tweak style

* 🩹 Fix MCU check for STM32H7-based BTT Octopus Pro V1

Co-authored-by: ellensp <530024+ellensp@users.noreply.github.com>

* Update Marlin/src/pins/stm32f4/pins_BTT_OCTOPUS_V1_common.h

---------

Co-authored-by: ellensp <530024+ellensp@users.noreply.github.com>

.devcontainer/Dockerfile

@@ -0,0 +1,29 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.187.0/containers/python-3/.devcontainer/base.Dockerfile
+
+# [Choice] Python version: 3, 3.9, 3.8, 3.7, 3.6
+ARG VARIANT="3.9.0-buster"
+FROM python:${VARIANT}
+
+# [Option] Install Node.js
+ARG INSTALL_NODE="true"
+ARG NODE_VERSION="lts/*"
+RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Optional] If your pip requirements rarely change, uncomment this section to add them to the image.
+# COPY requirements.txt /tmp/pip-tmp/
+# RUN pip3 --disable-pip-version-check --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \
+#    && rm -rf /tmp/pip-tmp
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1
+
+
+RUN pip install -U https://github.com/platformio/platformio-core/archive/develop.zip
+RUN platformio update
+# To get the test platforms
+RUN pip install PyYaml
+#ENV PATH /code/buildroot/bin/:/code/buildroot/tests/:${PATH}

.devcontainer/devcontainer.json

@@ -0,0 +1,51 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.187.0/containers/python-3
+{
+  "name": "Python 3",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": "..",
+    "args": {
+      // Update 'VARIANT' to pick a Python version: 3, 3.6, 3.7, 3.8, 3.9
+      "VARIANT": "3.9.0-buster",
+      // Options
+      "INSTALL_NODE": "false",
+      "NODE_VERSION": "lts/*"
+    }
+  },
+
+  // Set *default* container specific settings.json values on container create.
+  "settings": {
+    "python.pythonPath": "/usr/local/bin/python",
+    "python.languageServer": "Pylance",
+    "python.linting.enabled": true,
+    "python.linting.pylintEnabled": true,
+    "python.formatting.autopep8Path": "/usr/local/py-utils/bin/autopep8",
+    "python.formatting.blackPath": "/usr/local/py-utils/bin/black",
+    "python.formatting.yapfPath": "/usr/local/py-utils/bin/yapf",
+    "python.linting.banditPath": "/usr/local/py-utils/bin/bandit",
+    "python.linting.flake8Path": "/usr/local/py-utils/bin/flake8",
+    "python.linting.mypyPath": "/usr/local/py-utils/bin/mypy",
+    "python.linting.pycodestylePath": "/usr/local/py-utils/bin/pycodestyle",
+    "python.linting.pydocstylePath": "/usr/local/py-utils/bin/pydocstyle",
+    "python.linting.pylintPath": "/usr/local/py-utils/bin/pylint"
+  },
+
+  // Add the IDs of extensions you want installed when the container is created.
+  "extensions": [
+    "ms-python.python",
+    "ms-python.vscode-pylance",
+    "platformio.platformio-ide",
+    "marlinfirmware.auto-build",
+    "editorconfig.editorconfig"
+  ],
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  // "forwardPorts": [],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  // "postCreateCommand": "pip3 install --user -r requirements.txt",
+
+  // Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  // "remoteUser": "vscode"
+}

.editorconfig

@@ -1,19 +1,33 @@
 # editorconfig.org
 root = true
 
+[*]
+trim_trailing_whitespace = true
+insert_final_newline = true
+
 [{*.patch,syntax_test_*}]
 trim_trailing_whitespace = false
 
-[{*.c,*.cpp,*.h}]
-charset = utf-8
-
-[{*.c,*.cpp,*.h,Makefile}]
-trim_trailing_whitespace = true
-insert_final_newline = true
+[{*.c,*.cpp,*.h,*.ino,*.py,Makefile}]
 end_of_line = lf
+
+[{*.c,*.cpp,*.h,*.ino}]
+charset = utf-8
 indent_style = space
 indent_size = 2
 
-[{*.py,*.conf,*.sublime-project}]
+[{Makefile}]
+indent_style = tab
+indent_size = 2
+
+[*.md]
+# Two spaces at the end of the line means newline in Markdown
+trim_trailing_whitespace = false
+
+[{*.py}]
+indent_style = space
+indent_size = 4
+
+[{*.conf,*.sublime-project}]
 indent_style = tab
 indent_size = 4

.gitattributes

@@ -17,3 +17,5 @@
 *.png binary
 *.jpg binary
 *.fon binary
+*.bin binary
+*.woff binary

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,184 @@
+name: 🪲 Report a bug
+description: Create a bug report to help improve Marlin Firmware
+title: "[BUG] (bug summary)"
+labels: ["Bug: Potential ?"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Do you want to ask a question? Are you looking for support? Please use one of the [support links](https://github.com/MarlinFirmware/Marlin/issues/new/choose).
+
+  - type: markdown
+    attributes:
+      value: |
+        **Thank you for reporting a bug in Marlin Firmware!**
+
+        ## Before Reporting a Bug
+
+        - Read and understand Marlin's [Code of Conduct](https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/.github/code_of_conduct.md). You are expected to comply with it, including treating everyone with respect.
+
+        - Test with the [`bugfix-2.1.x` branch](https://github.com/MarlinFirmware/Marlin/archive/bugfix-2.1.x.zip) to see whether the issue still exists.
+
+        ## Instructions
+
+        Please follow the instructions below. Failure to do so may result in your issue being closed. See [Contributing to Marlin](https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/.github/contributing.md) for additional guidelines.
+
+        1. Provide a good title starting with [BUG].
+        2. Fill out all sections of this bug report form.
+        3. Always attach configuration files so we can build and test your setup.
+
+  - type: dropdown
+    attributes:
+      label: Did you test the latest `bugfix-2.1.x` code?
+      description: >-
+        Always try the latest code to make sure the issue you are reporting is not already fixed. To download
+        the latest code just [click this link](https://github.com/MarlinFirmware/Marlin/archive/bugfix-2.1.x.zip).
+      options:
+        - Yes, and the problem still exists.
+        - No, but I will test it now!
+    validations:
+      required: true
+
+  - type: markdown
+    attributes:
+      value: |
+        # Bug Details
+
+  - type: textarea
+    attributes:
+      label: Bug Description
+      description: >-
+        Describe the bug in this section. Tell us what you were trying to do and what
+        happened that you did not expect. Provide a clear and concise description of the
+        problem and include as many details as possible.
+
+        When pasting formatted text don't forget to put ` ``` ` (on its own line) before and after to make it readable.
+      placeholder: |
+        Marlin doesn't work.
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Bug Timeline
+      description: Is this a new bug or an old issue? When did it first start?
+
+  - type: textarea
+    attributes:
+      label: Expected behavior
+      description: >-
+        What did you expect to happen?
+      placeholder: I expected it to move left.
+
+  - type: textarea
+    attributes:
+      label: Actual behavior
+      description: What actually happened instead?
+      placeholder: It moved right instead of left.
+
+  - type: textarea
+    attributes:
+      label: Steps to Reproduce
+      description: >-
+        Please describe the steps needed to reproduce the issue.
+      placeholder: |
+        1. [First Step] ...
+        2. [Second Step] ...
+        3. [and so on] ...
+
+  - type: markdown
+    attributes:
+      value: |
+        # Your Setup
+
+  - type: input
+    attributes:
+      label: Version of Marlin Firmware
+      description: "See the About Menu on the LCD or the output of `M115`. NOTE: For older releases we only patch critical bugs."
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Printer model
+      description: Creality Ender-3, Prusa mini, or Kossel Delta?
+
+  - type: input
+    attributes:
+      label: Electronics
+      description: Stock electronics, upgrade board, or something else?
+
+  - type: input
+    attributes:
+      label: LCD/Controller
+      description: Some Marlin behaviors are determined by the controller. Describe your LCD/Controller model and version.
+
+  - type: input
+    attributes:
+      label: Other add-ons
+      description: Please list any other hardware add-ons that could be involved.
+
+  - type: dropdown
+    attributes:
+      label: Bed Leveling
+      description: What kind of bed leveling compensation are you using?
+      options:
+        - UBL Bilinear mesh
+        - ABL Bilinear mesh
+        - ABL Linear grid
+        - ABL 3-point
+        - MBL Manual Bed Leveling
+        - No Bed Leveling
+
+  - type: dropdown
+    attributes:
+      label: Your Slicer
+      description: Do you use Slic3r, Prusa Slicer, Simplify3D, IdeaMaker...?
+      options:
+        - Slic3r
+        - Simplify3D
+        - Prusa Slicer
+        - IdeaMaker
+        - Cura
+        - Other (explain below)
+
+  - type: dropdown
+    attributes:
+      label: Host Software
+      description: Do you use OctoPrint, Repetier Host, Pronterface...?
+      options:
+        - SD Card (headless)
+        - Repetier Host
+        - OctoPrint
+        - Pronterface
+        - Cura
+        - Same as my slicer
+        - Other (explain below)
+
+  - type: markdown
+    attributes:
+      value: |
+        # Attachments
+
+  - type: checkboxes
+    attributes:
+      label: Don't forget to include
+      options:
+        - label: A ZIP file containing your `Configuration.h` and `Configuration_adv.h`.
+          required: true
+
+  - type: markdown
+    attributes:
+      value: |
+        ### Optional items to include:
+        - 'Log output from the host. (`M111 S247` for maximum logging.)'
+        - Images or videos demonstrating the problem, if it helps to make it clear.
+        - A G-Code file that exposes the problem, if not affecting _all_ G-code.
+
+  - type: textarea
+    attributes:
+      label: Additional information & file uploads
+      description: >-
+        If you've made any other modifications to the firmware, please describe them in detail.
+
+        When pasting formatted text don't forget to put ` ``` ` (on its own line) before and after to make it readable.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,20 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 📖 Marlin Documentation
+    url: https://marlinfw.org/
+    about: Lots of documentation on installing and using Marlin.
+  - name: 👤 MarlinFirmware Facebook group
+    url: https://www.facebook.com/groups/1049718498464482
+    about: Please ask and answer questions here.
+  - name: 🕹 Marlin on Discord
+    url: https://discord.gg/n5NJ59y
+    about: Join the Discord server for support and discussion.
+  - name: 🔗 Marlin Discussion Forum
+    url: https://reprap.org/forum/list.php?415
+    about: A searchable web forum hosted by RepRap dot org.
+  - name: 📺 Marlin Videos on YouTube
+    url: https://www.youtube.com/results?search_query=marlin+firmware
+    about: Tutorials and more from Marlin users all around the world. Great for new users!
+  - name: 💸 Want to donate?
+    url: https://www.thinkyhead.com/donate-to-marlin
+    about: Please take a look at the various options to support Marlin Firmware's development financially!

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,44 @@
+name: ✨ Request a feature
+description: Request a new Marlin Firmware feature
+title: "[FR] (feature summary)"
+labels: ["T: Feature Request"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Do you want to ask a question? Are you looking for support? Please use one of the [support links](https://github.com/MarlinFirmware/Marlin/issues/new/choose).
+
+  - type: markdown
+    attributes:
+      value: >
+        **Thank you for requesting a new Marlin Firmware feature!**
+
+        ## Before Requesting a Feature
+
+        - Read and understand Marlin's [Code of Conduct](https://github.com/MarlinFirmware/Marlin/blob/master/.github/code_of_conduct.md). You are expected to comply with it, including treating everyone with respect.
+
+        - Check the latest [`bugfix-2.1.x` branch](https://github.com/MarlinFirmware/Marlin/archive/bugfix-2.1.x.zip) to see if the feature already exists.
+
+        - Before you proceed with your request, please consider if it is necessary to make it into a firmware feature, or if it may be better suited for a slicer or host feature.
+
+  - type: textarea
+    attributes:
+      label: Is your feature request related to a problem? Please describe.
+      description: A clear description of the problem (e.g., "I need X but Marlin can't do it [...]").
+
+  - type: textarea
+    attributes:
+      label: Are you looking for hardware support?
+      description: Tell us the printer, board, or peripheral that needs support.
+
+  - type: textarea
+    attributes:
+      label: Describe the feature you want
+      description: A clear description of the feature and how you think it should work.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add any other context or screenshots about the feature request here.

.github/code_of_conduct.md

@@ -28,15 +28,9 @@ Project maintainers are responsible for clarifying the standards of acceptable b
 
 Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
 
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
-
 ## Enforcement
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at [marlinfirmware@github.com](mailto:marlinfirmware@github.com). All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by following GitHub's [reporting abuse or spam article](https://docs.github.com/en/communities/maintaining-your-safety-on-github/reporting-abuse-or-spam). All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances.
 
 ## Attribution
 

.github/contributing.md

@@ -26,16 +26,20 @@ The following is a set of guidelines for contributing to Marlin, hosted by the [
 
 ## Code of Conduct
 
-This project and everyone participating in it is governed by the [Marlin Code of Conduct](code_of_conduct.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to [marlinfirmware@github.com](mailto:marlinfirmware@github.com).
+This project and everyone participating in it is governed by the [Marlin Code of Conduct](code_of_conduct.md). By participating, you are expected to uphold this code. Please report unacceptable behavior by following GitHub's [reporting abuse or spam article](https://docs.github.com/en/communities/maintaining-your-safety-on-github/reporting-abuse-or-spam).
 
 ## I don't want to read this whole thing I just have a question!!!
 
-> **Note:** Please don't file an issue to ask a question. You'll get faster results by using the resources below.
+> [!NOTE]
+> Please don't file an issue to ask a question. You'll get faster results by using the resources below.
 
 We have a Message Board and a Facebook group where our knowledgable user community can provide helpful advice if you have questions.
 
-* [Marlin RepRap forum](https://reprap.org/forum/list.php?415)
-* [MarlinFirmware on Facebook](https://www.facebook.com/groups/1049718498464482/)
+- [Marlin Documentation](https://marlinfw.org) - Official Marlin documentation
+- Facebook Group ["Marlin Firmware"](https://www.facebook.com/groups/1049718498464482/)
+- RepRap.org [Marlin Forum](https://forums.reprap.org/list.php?415)
+- Facebook Group ["Marlin Firmware for 3D Printers"](https://www.facebook.com/groups/3Dtechtalk/)
+- [Marlin Configuration](https://www.youtube.com/results?search_query=marlin+configuration) on YouTube
 
 If chat is more your speed, you can join the MarlinFirmware Discord server:
 
@@ -50,13 +54,14 @@ If chat is more your speed, you can join the MarlinFirmware Discord server:
 
 This section guides you through submitting a Bug Report for Marlin. Following these guidelines helps maintainers and the community understand your report, reproduce the behavior, and find related reports.
 
-Before creating a Bug Report, please test the "nightly" development branch, as you might find out that you don't need to create one. When you are creating a Bug Report, please [include as many details as possible](#how-do-i-submit-a-good-bug-report). Fill out [the required template](issue_template.md), the information it asks for helps us resolve issues faster.
+Before creating a Bug Report, please test the "nightly" development branch, as you might find out that you don't need to create one. When you are creating a Bug Report, please [include as many details as possible](#how-do-i-submit-a-good-bug-report). Fill out [the required template](ISSUE_TEMPLATE/bug_report.yml), the information it asks for helps us resolve issues faster.
 
-> **Note:** Regressions can happen. If you find a **Closed** issue that seems like your issue, go ahead and open a new issue and include a link to the original issue in the body of your new one. All you need to create a link is the issue number, preceded by #. For example, #8888.
+> [!NOTE]
+> Regressions can happen. If you find a **Closed** issue that seems like your issue, go ahead and open a new issue and include a link to the original issue in the body of your new one. All you need to create a link is the issue number, preceded by #. For example, #8888.
 
 #### How Do I Submit A (Good) Bug Report?
 
-Bugs are tracked as [GitHub issues](https://guides.github.com/features/issues/). Use the New Issue button to create an issue and provide the following information by filling in [the template](issue_template.md).
+Bugs are tracked as [GitHub issues](https://guides.github.com/features/issues/). Use the New Issue button to create an issue and provide the following information by filling in [the template](ISSUE_TEMPLATE/bug_report.yml).
 
 Explain the problem and include additional details to help maintainers reproduce the problem:
 
@@ -88,12 +93,12 @@ Include details about your configuration and environment:
 
 This section guides you through submitting a suggestion for Marlin, including completely new features and minor improvements to existing functionality. Following these guidelines helps maintainers and the community understand your suggestion and find related suggestions.
 
-Before creating a suggestion, please check [this list](#before-submitting-a-suggestion) as you might find out that you don't need to create one. When you are creating an enhancement suggestion, please [include as many details as possible](#how-do-i-submit-a-good-enhancement-suggestion). Fill in [the template](issue_template.md), including the steps that you imagine you would take if the feature you're requesting existed.
+Before creating a suggestion, please check [this list](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aopen+is%3Aissue+label%3A%22T%3A+Feature+Request%22) as you might find out that you don't need to create one. When you are creating an enhancement suggestion, please [include as many details as possible](#how-do-i-submit-a-good-feature-request). Fill in [the template](ISSUE_TEMPLATE/feature_request.yml), including the steps that you imagine you would take if the feature you're requesting existed.
 
 #### Before Submitting a Feature Request
 
 * **Check the [Marlin website](https://marlinfw.org/)** for tips — you might discover that the feature is already included. Most importantly, check if you're using [the latest version of Marlin](https://github.com/MarlinFirmware/Marlin/releases) and if you can get the desired behavior by changing [Marlin's config settings](https://marlinfw.org/docs/configuration/configuration.html).
-* **Perform a [cursory search](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aissue)** to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.
+* **Perform a [cursory search](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aopen+is%3Aissue+label%3A%22T%3A+Feature+Request%22)** to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.
 
 #### How Do I Submit A (Good) Feature Request?
 
@@ -116,7 +121,7 @@ Unsure where to begin contributing to Marlin? You can start by looking through t
 
 ### Pull Requests
 
-Pull Requests should always be targeted to working branches (e.g., `bugfix-1.1.x` and/or `bugfix-2.0.x`) and never to release branches (e.g., `1.1.x`). If this is your first Pull Request, please read our [Guide to Pull Requests](https://marlinfw.org/docs/development/getting_started_pull_requests.html) and Github's [Pull Request](https://help.github.com/articles/creating-a-pull-request/) documentation.
+Pull Requests should always be targeted to working branches (e.g., `bugfix-2.1.x` and/or `bugfix-1.1.x`) and never to release branches (e.g., `2.0.x` and/or `1.1.x`). If this is your first Pull Request, please read our [Guide to Pull Requests](https://marlinfw.org/docs/development/getting_started_pull_requests.html) and Github's [Pull Request](https://help.github.com/articles/creating-a-pull-request/) documentation.
 
 * Fill in [the required template](pull_request_template.md).
 * Don't include issue numbers in the PR title.

.github/issue_template.md

@@ -1,35 +0,0 @@
-<!--
-
-Have you read Marlin's Code of Conduct? By filing an Issue, you are expected to comply with it, including treating everyone with respect: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/.github/code_of_conduct.md
-
-Do you want to ask a question? Are you looking for support? Please don't post here. Instead use one of the following options:
-
-- The Marlin Firmware forum at https://reprap.org/forum/list.php?415
-- The MarlinFirmware Facebook Group at https://www.facebook.com/groups/1049718498464482/
-- The MarlinFirmware Discord Server at https://discord.gg/n5NJ59y.
-
-Before filing an issue be sure to test the latest "bugfix" branch to see whether the issue is already addressed.
-
--->
-
-### Description
-
-<!-- Description of the bug or requested feature -->
-
-### Steps to Reproduce
-
-<!-- If this is a Bug Report, please describe the steps needed to reproduce the issue -->
-
-1. [First Step]
-2. [Second Step]
-3. [and so on...]
-
-**Expected behavior:** [What you expect to happen]
-
-**Actual behavior:** [What actually happens]
-
-#### Additional Information
-
-* Include a ZIP file containing your `Configuration.h` and `Configuration_adv.h` files.
-* Provide pictures or links to videos that clearly demonstrate the issue.
-* See [How Can I Contribute](#how-can-i-contribute) for additional guidelines.

.github/lock.yml

@@ -1,40 +0,0 @@
-#
-# Configuration for Lock Threads - https://github.com/dessant/lock-threads-app
-#
-
-# Number of days of inactivity before a closed issue or pull request is locked
-daysUntilLock: 60
-
-# Skip issues and pull requests created before a given timestamp. Timestamp must
-# follow ISO 8601 (`YYYY-MM-DD`). Set to `false` to disable
-skipCreatedBefore: false
-
-# Issues and pull requests with these labels will be ignored. Set to `[]` to disable
-exemptLabels: [ 'no-locking' ]
-
-# Label to add before locking, such as `outdated`. Set to `false` to disable
-lockLabel: false
-
-# Comment to post before locking. Set to `false` to disable
-lockComment: >
-  This thread has been automatically locked since there has not been
-  any recent activity after it was closed. Please open a new issue for
-  related bugs.
-
-# Assign `resolved` as the reason for locking. Set to `false` to disable
-setLockReason: true
-
-# Limit to only `issues` or `pulls`
-# only: issues
-
-# Optionally, specify configuration settings just for `issues` or `pulls`
-# issues:
-#   exemptLabels:
-#     - help-wanted
-#   lockLabel: outdated
-
-# pulls:
-#   daysUntilLock: 30
-
-# Repository to extend settings from
-# _extends: repo

.github/pull_request_template.md

@@ -1,23 +1,33 @@
-### Requirements
+<!--
 
-* Filling out this template is required. Pull Requests without a clear description may be closed at the maintainers' discretion.
+Submitting a Pull Request
+
+- Please fill out all sections of this form. You can delete the helpful comments.
+- Pull Requests without clear information will take longer and may even be rejected.
+- We get a high volume of submissions so please be patient during review.
+
+-->
 
 ### Description
 
 <!--
 
-We must be able to understand your proposed change from this description. If we can't understand what the code will do from this description, the Pull Request may be closed at the maintainers' discretion. Keep in mind that the maintainer reviewing this PR may not be familiar with or have worked with the code recently, so please walk us through the concepts.
+Clearly describe the submitted changes with lots of details. Include images where helpful. Initial reviewers may not be familiar with the subject, so be as thorough as possible. You can use MarkDown syntax to improve readability with bullet lists, code blocks, and so on. PREVIEW and fix up formatting before submitting.
 
 -->
 
+### Requirements
+
+<!-- Does this PR require a specific board, LCD, etc.? -->
+
 ### Benefits
 
-<!-- What does this fix or improve? -->
+<!-- What does this PR fix or improve? -->
 
 ### Configurations
 
-<!-- Attach any Configuration.h, Configuration_adv.h, or platformio.ini files needed to compile/test your Pull Request. -->
+<!-- Attach Configurations ZIP and any other files needed to test this PR. -->
 
 ### Related Issues
 
-<!-- Whether this fixes a bug or fulfills a feature request, please list any related Issues here. -->
+<!-- Does this PR fix a bug or fulfill a Feature Request? Link related Issues here. -->

.github/workflows/auto-label.yml

@@ -0,0 +1,41 @@
+#
+# auto-label.yml
+# - Find all open issues without a label and a title containing "[BUG]".
+# - Apply the label "Bug: Potential ?" to these issues.
+#
+
+name: Label Old Bugs
+
+on:
+  schedule:
+  - cron: "30 8 * * *"
+
+jobs:
+  autolabel:
+    name: Auto Label
+    if: github.repository == 'MarlinFirmware/Marlin'
+    runs-on: ubuntu-latest
+    steps:
+    - name: Auto Label for [BUG]
+      uses: actions/github-script@v7
+      with:
+        script: |
+          // Get all open issues in this repository
+          const issueList = await github.rest.issues.listForRepo({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            state: 'open'
+          });
+          // Filter issues without labels that have a title containing '[BUG]'.
+          const matchingIssues = issueList.data.filter(
+            issue => issue.title.includes('[BUG]') && issue.labels.length === 0
+          );
+          // Process the first 50
+          for (const issue of matchingIssues.slice(0, 50)) {
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: issue.number,
+              labels: ['Bug: Potential ?']
+            });
+          }

.github/workflows/bump-date.yml

@@ -0,0 +1,59 @@
+#
+# bump-date.yml
+# Bump the distribution date once per day
+#
+
+name: Bump Distribution Date
+
+on:
+  schedule:
+    - cron: '0 */6 * * *'
+
+jobs:
+  bump_date:
+    name: Bump Distribution Date
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Check out bugfix-2.0.x
+      uses: actions/checkout@v4
+      with:
+        ref: bugfix-2.0.x
+
+    - name: Bump Date (bugfix-2.0.x)
+      run: |
+        # Inline Bump Script
+        if [[ ! "$( git log -1 --pretty=%B )" =~ ^\[cron\] ]]; then
+          DIST=$( date +"%Y-%m-%d" )
+          eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/src/inc/Version.h" && \
+          eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/Version.h" && \
+          git config user.name "${GITHUB_ACTOR}" && \
+          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com" && \
+          git add . && \
+          git commit -m "[cron] Bump distribution date ($DIST)" && \
+          git push
+        fi
+        exit 0
+
+    - name: Check out bugfix-2.1.x
+      uses: actions/checkout@v4
+      with:
+        ref: bugfix-2.1.x
+
+    - name: Bump Date (bugfix-2.1.x)
+      run: |
+        # Inline Bump Script
+        if [[ ! "$( git log -1 --pretty=%B )" =~ ^\[cron\] ]]; then
+          DIST=$( date +"%Y-%m-%d" )
+          eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/src/inc/Version.h" && \
+          eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/Version.h" && \
+          git config user.name "${GITHUB_ACTOR}" && \
+          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com" && \
+          git add . && \
+          git commit -m "[cron] Bump distribution date ($DIST)" && \
+          git push
+        fi
+        exit 0

.github/workflows/check-pr.yml

@@ -0,0 +1,33 @@
+#
+# check-pr.yml
+# Close PRs directed at release branches
+#
+
+name: PR Bad Target
+
+on:
+  pull_request_target:
+    types: [opened]
+    branches:
+    - 1.0.x
+    - 1.1.x
+    - 2.0.x
+
+jobs:
+  bad_target:
+    name: PR Bad Target
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: superbrothers/close-pull-request@v3
+      with:
+        comment: >
+          Thanks for your contribution! Unfortunately we can't accept PRs directed at release branches. We make patches to the bugfix branches and only later do we push them out as releases.
+
+          Please redo this PR starting with the `bugfix-2.1.x` branch and be careful to target `bugfix-2.1.x` when resubmitting the PR. Patches may also target `bugfix-2.0.x` if they are specifically for 2.0.9.x.
+
+          It may help to set your fork's default branch to `bugfix-2.1.x`.
+
+          See [this page](https://marlinfw.org/docs/development/getting_started_pull_requests.html) for full instructions.

.github/workflows/clean-closed.yml

@@ -0,0 +1,40 @@
+#
+# clean-closed.yml
+# Remove obsolete labels when an Issue or PR is closed
+#
+
+name: Clean Closed
+
+on:
+  pull_request:
+    types: [closed]
+  issues:
+    types: [closed]
+
+jobs:
+  remove_label:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        label:
+          - "S: Don't Merge"
+          - "S: Hold for 2.1"
+          - "S: Please Merge"
+          - "S: Please Test"
+          - "help wanted"
+          - "Bug: Potential ?"
+          - "Needs: Discussion"
+          - "Needs: Documentation"
+          - "Needs: More Data"
+          - "Needs: Patch"
+          - "Needs: Testing"
+          - "Needs: Work"
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Remove Labels
+        uses: actions-ecosystem/action-remove-labels@v1
+        with:
+          github_token: ${{ github.token }}
+          labels: ${{ matrix.label }}

.github/workflows/close-stale.yml

@@ -0,0 +1,40 @@
+#
+# close-stale.yml
+# Close open issues after a period of inactivity
+#
+
+name: Close Stale Issues
+
+on:
+  schedule:
+  - cron: "22 1 * * *"
+
+jobs:
+  stale:
+    name: Close Stale Issues
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v9
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: |
+          Greetings from the Marlin AutoBot!
+          This issue has had no activity for the last 90 days.
+          Do you still see this issue with the latest `bugfix-2.1.x` code?
+          Please add a reply within 14 days or this issue will be automatically closed.
+          To keep a confirmed issue open we can also add a "Bug: Confirmed" tag.
+
+          Disclaimer: This is an open community project with lots of activity and limited
+          resources. The main project contributors will do a bug sweep ahead of the next
+          release, but any skilled member of the community may jump in at any time to fix
+          this issue. That can take a while depending on our busy lives so please be patient,
+          and take advantage of other resources such as the MarlinFirmware Discord to help
+          solve the issue.
+        days-before-stale: 90
+        days-before-close: 14
+        stale-issue-label: 'stale-closing-soon'
+        exempt-all-assignees: true
+        exempt-issue-labels: 'Bug: Confirmed !,T: Feature Request,Needs: More Data,Needs: Discussion,Needs: Documentation,Needs: Patch,Needs: Work,Needs: Testing,help wanted,no-locking'

.github/workflows/lock-closed.yml

@@ -0,0 +1,32 @@
+#
+# lock-closed.yml
+# Lock closed issues after a period of inactivity
+#
+
+name: Lock Closed Issues
+
+on:
+  schedule:
+    - cron: '0 1/13 * * *'
+
+jobs:
+  lock:
+    name: Lock Closed Issues
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: dessant/lock-threads@v5
+      with:
+        github-token: ${{ github.token }}
+        process-only: 'issues'
+        issue-inactive-days: '60'
+        exclude-issue-created-before: ''
+        exclude-any-issue-labels: 'no-locking'
+        add-issue-labels: ''
+        issue-comment: >
+          This issue has been automatically locked since there
+          has not been any recent activity after it was closed.
+          Please open a new issue for related bugs.
+        issue-lock-reason: ''

.github/workflows/test-builds.yml

@@ -8,7 +8,8 @@ name: CI
 on:
   pull_request:
     branches:
-    - bugfix-2.0.x
+    - bugfix-2.1.x
+    - 2.1.x
     paths-ignore:
     - config/**
     - data/**
@@ -16,7 +17,8 @@ on:
     - '**/*.md'
   push:
     branches:
-    - bugfix-2.0.x
+    - bugfix-2.1.x
+    - 2.1.x
     paths-ignore:
     - config/**
     - data/**
@@ -33,91 +35,148 @@ jobs:
     strategy:
       matrix:
         test-platform:
-        # Base Environments
 
-        - DUE
-        - esp32
+        # Native
         - linux_native
+
+        # AVR
         - mega2560
-        - teensy31
-        - teensy35
-        - teensy41
-        - SAMD51_grandcentral_m4
-
-        # Extended AVR Environments
-
-        - FYSETC_F6_13
         - mega1280
+        - at90usb1286_dfu
+
+        # AVR Extended
+        - FYSETC_F6
+        - melzi_optiboot
         - rambo
         - sanguino1284p
         - sanguino644p
 
-        # Extended STM32 Environments
+        # SAM3X8E
+        - DUE
+        - DUE_archim
 
-        - STM32F103RC_btt
-        - STM32F103RC_btt_USB
-        - STM32F103RE_btt
-        - STM32F103RE_btt_USB
-        - STM32F103RC_fysetc
-        - STM32F103RC_meeb
-        - jgaurora_a5s_a1
-        - STM32F103VE_longer
-        - STM32F407VE_black
-        - STM32F401VE_STEVAL
-        - BIGTREE_BTT002
-        - BIGTREE_SKR_PRO
-        - BIGTREE_GTR_V1_0
-        - mks_robin
-        - mks_robin_stm32
-        - ARMED
-        - FYSETC_S6
+        # SAMD21
+        - SAMD51_grandcentral_m4
+        - SAMD21_minitronics20
+
+        # ESP32
+        - esp32
+        - mks_tinybee
+
+        # Teensy 2
+        #- at90usb1286_cdc
+
+        # Teensy MK20DX256
+        - teensy31
+
+        # Teensy MK64FX512, MK66FX1M0
+        - teensy35
+
+        # Teensy IMXRT1062DVx6A
+        - teensy41
+
+        # STM32F0
+        - malyan_M300
         - STM32F070CB_malyan
         - STM32F070RB_malyan
-        - malyan_M300
-        - mks_robin_lite
+
+        # STM32F1
+        - chitu_f103
+        - mks_robin
+        - mks_robin_nano_v1v2
+        - PANDA_PI_V29
+        - STM32F103RC_btt
+        - STM32F103RC_fysetc
+        - STM32F103RE_btt
+        - STM32F103RE_btt_USB
+        - STM32F103RE_creality
+        - STM32F103VE_longer
+        #- mks_robin_mini
+        #- mks_robin_nano_v1_3_f4_usbmod
+        #- mks_robin_nano_v1v2_usbmod
+        #- STM32F103CB_malyan
+        #- STM32F103RC_btt_USB
+        #- STM32F103RE
+
+        # STM32F4
+        - ARMED
+        - BIGTREE_BTT002
+        - BIGTREE_GTR_V1_0
+        - BIGTREE_SKR_PRO
         - FLYF407ZG
-        - rumba32
-        - mks_robin_pro
-        - STM32F103RET6_creality
+        - FYSETC_S6
+        - LERDGEK
         - LERDGEX
-        - mks_robin_nano35
+        - mks_robin_pro2
+        - Opulo_Lumen_REV3
+        - rumba32
+        - STM32F401RC_creality
+        - STM32F407VE_black
+        - I3DBEEZ9_V1
 
-        # Put lengthy tests last
+        # STM32F7
+        - NUCLEO_F767ZI
+        - REMRAM_V1
 
+        # STM32H7
+        - BTT_SKR_SE_BX
+        - STM32H743VI_btt
+
+        # STM32F1 (Maple)
+        - jgaurora_a5s_a1_maple
+        - mks_robin_lite_maple
+        - mks_robin_pro_maple
+        - STM32F103RC_btt_USB_maple
+        - STM32F103RC_fysetc_maple
+        - STM32F103RC_meeb_maple
+        - STM32F103VE_longer_maple
+        - STM32F103VE_ZM3E4V2_USB_maple
+        #- mks_robin_maple
+        #- mks_robin_nano_v1v2_maple
+        #- STM32F103RC_btt_maple
+        #- STM32F103RE_creality_maple
+
+        # STM32G0
+        - STM32G0B1RE_btt
+
+        # HC32
+        - HC32F460C_aquila_101
+
+        # LPC176x - Lengthy tests
         - LPC1768
         - LPC1769
 
-        # STM32 with non-STM framework. both broken for now. they should use HAL_STM32 which is working.
-
-        #- STM32F4
-        #- STM32F7
-
-        # Non-working environment tests
-        #- at90usb1286_cdc
-        #- at90usb1286_dfu
-        #- STM32F103CB_malyan
-        #- mks_robin_mini
-
     steps:
 
-    - name: Select Python 3.7
-      uses: actions/setup-python@v1
+    - name: Check out the PR
+      uses: actions/checkout@v4
+
+    - name: Cache pip
+      uses: actions/cache@v4
       with:
-        python-version: '3.7' # Version range or exact version of a Python version to use, using semvers version range syntax.
-        architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+
+    - name: Cache PlatformIO
+      uses: actions/cache@v4
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
+    - name: Select Python 3.9
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.9'
+        architecture: 'x64'
 
     - name: Install PlatformIO
       run: |
-        pip install -U https://github.com/platformio/platformio-core/archive/develop.zip
-        platformio update
-
-    - name: Check out the PR
-      uses: actions/checkout@v2
+        pip install -U platformio
+        pio upgrade --dev
+        pio pkg update --global
 
     - name: Run ${{ matrix.test-platform }} Tests
       run: |
-        # Inline tests script
-        chmod +x buildroot/bin/*
-        chmod +x buildroot/tests/*
-        export PATH=./buildroot/bin/:./buildroot/tests/:${PATH}
-        run_tests . ${{ matrix.test-platform }}
+        make tests-single-ci TEST_TARGET=${{ matrix.test-platform }}

.github/workflows/unlock-reopened.yml

@@ -0,0 +1,22 @@
+#
+# unlock-reopened.yml
+# Unlock an issue whenever it is re-opened
+#
+
+name: "Unlock reopened issue"
+
+on:
+  issues:
+    types: [reopened]
+
+jobs:
+  unlock:
+    name: Unlock Reopened
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: OSDKDev/unlock-issues@v1.1
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"

.gitignore

@@ -19,34 +19,23 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 
-# Our automatic versioning scheme generates the following file
-# NEVER put it in the repository
+# Generated files
 _Version.h
+bdf2u8g.exe
+genpages.exe
+marlin_config.json
+mczip.h
+language*.csv
+out-csv/
+out-language/
+*.gen
+*.sublime-workspace
 
-#
 # OS
-#
 applet/
-*.DS_Store
+.DS_Store
 
-#
-# Misc
-#
-*~
-*.orig
-*.rej
-*.bak
-*.idea
-*.s
-*.i
-*.ii
-*.swp
-tags
-
-#
-# C++
-#
-# Compiled Object files
+# Compiled C++ Object files
 *.slo
 *.lo
 *.o
@@ -77,11 +66,7 @@ tags
 *.out
 *.app
 
-
-#
-# C
-#
-# Object files
+# Compiled C Object files
 *.o
 *.ko
 *.obj
@@ -123,33 +108,10 @@ tags
 .gcc-flags.json
 /lib/
 
-# Workaround for Deviot+platformio quirks
-Marlin/lib
-Marlin/platformio.ini
-Marlin/*/platformio.ini
-Marlin/*/*/platformio.ini
-Marlin/*/*/*/platformio.ini
-Marlin/*/*/*/*/platformio.ini
-Marlin/.travis.yml
-Marlin/*/.travis.yml
-Marlin/*/*/.travis.yml
-Marlin/*/*/*/.travis.yml
-Marlin/*/*/*/*/.travis.yml
-Marlin/.gitignore
-Marlin/*/.gitignore
-Marlin/*/*/.gitignore
-Marlin/*/*/*/.gitignore
-Marlin/*/*/*/*/.gitignore
-Marlin/readme.txt
-Marlin/*/readme.txt
-Marlin/*/*/readme.txt
-Marlin/*/*/*/readme.txt
-Marlin/*/*/*/*/readme.txt
-
 # Secure Credentials
 Configuration_Secure.h
 
-#Visual Studio
+# Visual Studio
 *.sln
 *.vcxproj
 *.vcxproj.user
@@ -160,27 +122,49 @@ __vm/
 .vs/
 vc-fileutils.settings
 
-#Visual Studio Code
-.vscode
-.vscode/.browse.c_cpp.db*
-.vscode/c_cpp_properties.json
-.vscode/launch.json
-.vscode/*.db
+# Visual Studio Code
+.vscode/*
+!.vscode/extensions.json
 
-#cmake
+# Simulation files
+imgui.ini
+eeprom.dat
+spi_flash.bin
+fs.img
+
+# CMake
+buildroot/share/cmake/*
 CMakeLists.txt
+!buildroot/share/cmake/CMakeLists.txt
 src/CMakeLists.txt
 CMakeListsPrivate.txt
+build/
 
-#CLion
+# CLion
 cmake-build-*
 
-#Eclipse
+# Eclipse
 .project
 .cproject
 .pydevproject
 .settings
 .classpath
 
-#Python
+# Python
 __pycache__
+
+# IOLogger logs
+*_log.csv
+
+# Misc.
+*~
+*.orig
+*.rej
+*.bak
+*.idea
+*.i
+*.ii
+*.swp
+tags
+*.logs
+*.bak

.vscode/extensions.json

@@ -0,0 +1,12 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "marlinfirmware.auto-build",
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode-remote.remote-containers",
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

Makefile

@@ -0,0 +1,65 @@
+SCRIPTS_DIR := buildroot/share/scripts
+CONTAINER_RT_BIN := docker
+CONTAINER_RT_OPTS := --rm -v $(PWD):/code -v platformio-cache:/root/.platformio
+CONTAINER_IMAGE := marlin-dev
+
+help:
+	@echo "Tasks for local development:"
+	@echo "make marlin                    : Build marlin for the configured board"
+	@echo "make format-pins               : Reformat all pins files"
+	@echo "make tests-single-ci           : Run a single test from inside the CI"
+	@echo "make tests-single-local        : Run a single test locally"
+	@echo "make tests-single-local-docker : Run a single test locally, using docker"
+	@echo "make tests-all-local           : Run all tests locally"
+	@echo "make tests-all-local-docker    : Run all tests locally, using docker"
+	@echo "make setup-local-docker        : Build the local docker image"
+	@echo ""
+	@echo "Options for testing:"
+	@echo "  TEST_TARGET          Set when running tests-single-*, to select the"
+	@echo "                       test. If you set it to ALL it will run all "
+	@echo "                       tests, but some of them are broken: use "
+	@echo "                       tests-all-* instead to run only the ones that "
+	@echo "                       run on GitHub CI"
+	@echo "  ONLY_TEST            Limit tests to only those that contain this, or"
+	@echo "                       the index of the test (1-based)"
+	@echo "  VERBOSE_PLATFORMIO   If you want the full PIO output, set any value"
+	@echo "  GIT_RESET_HARD       Used by CI: reset all local changes. WARNING:"
+	@echo "                       THIS WILL UNDO ANY CHANGES YOU'VE MADE!"
+
+marlin:
+	./buildroot/bin/mftest -a
+.PHONY: marlin
+
+tests-single-ci:
+	export GIT_RESET_HARD=true
+	$(MAKE) tests-single-local TEST_TARGET=$(TEST_TARGET) PLATFORMIO_BUILD_FLAGS=-DGITHUB_ACTION
+
+tests-single-local:
+	@if ! test -n "$(TEST_TARGET)" ; then echo "***ERROR*** Set TEST_TARGET=<your-module> or use make tests-all-local" ; return 1; fi
+	export PATH="./buildroot/bin/:./buildroot/tests/:${PATH}" \
+	  && export VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) \
+	  && run_tests . $(TEST_TARGET) "$(ONLY_TEST)"
+
+tests-single-local-docker:
+	@if ! test -n "$(TEST_TARGET)" ; then echo "***ERROR*** Set TEST_TARGET=<your-module> or use make tests-all-local-docker" ; return 1; fi
+	@if ! $(CONTAINER_RT_BIN) images -q $(CONTAINER_IMAGE) > /dev/null ; then $(MAKE) setup-local-docker ; fi
+	$(CONTAINER_RT_BIN) run $(CONTAINER_RT_OPTS) $(CONTAINER_IMAGE) $(MAKE) tests-single-local TEST_TARGET=$(TEST_TARGET) VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) GIT_RESET_HARD=$(GIT_RESET_HARD) ONLY_TEST="$(ONLY_TEST)"
+
+tests-all-local:
+	export PATH="./buildroot/bin/:./buildroot/tests/:${PATH}" \
+	  && export VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) \
+	  && for TEST_TARGET in $$($(SCRIPTS_DIR)/get_test_targets.py) ; do echo "Running tests for $$TEST_TARGET" ; run_tests . $$TEST_TARGET ; done
+
+tests-all-local-docker:
+	@if ! $(CONTAINER_RT_BIN) images -q $(CONTAINER_IMAGE) > /dev/null ; then $(MAKE) setup-local-docker ; fi
+	$(CONTAINER_RT_BIN) run $(CONTAINER_RT_OPTS) $(CONTAINER_IMAGE) $(MAKE) tests-all-local VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) GIT_RESET_HARD=$(GIT_RESET_HARD)
+
+setup-local-docker:
+	$(CONTAINER_RT_BIN) build -t $(CONTAINER_IMAGE) -f docker/Dockerfile .
+
+PINS := $(shell find Marlin/src/pins -mindepth 2 -name '*.h')
+
+$(PINS): %:
+	@echo "Formatting $@" && node $(SCRIPTS_DIR)/pinsformat.js $@
+
+format-pins: $(PINS)

Marlin/Makefile

@@ -22,8 +22,10 @@
 #     (e.g. UPLOAD_PORT = /dev/tty.USB0).  If the exact name of this file
 #     changes, you can use * as a wild card (e.g. UPLOAD_PORT = /dev/tty.usb*).
 #
-#  3. Set the line containing "MCU" to match your board's processor.
-#     Older one's are atmega8 based, newer ones like Arduino Mini, Bluetooth
+#  3. Set the line containing "MCU" to match your board's processor. Set
+#     "PROG_MCU" as the AVR part name corresponding to "MCU". You can use the
+#     following command to get a list of correspondences: `avrdude -c alf -p x`
+#     Older boards are atmega8 based, newer ones like Arduino Mini, Bluetooth
 #     or Diecimila have the atmega168.  If you're using a LilyPad Arduino,
 #     change F_CPU to 8000000. If you are using Gen7 electronics, you
 #     probably need to use 20000000. Either way, you must regenerate
@@ -34,18 +36,18 @@
 #  5. Type "make upload", reset your Arduino board, and press enter to
 #     upload your program to the Arduino board.
 #
-# Note that all settings at the top of this file can be overriden from
+# Note that all settings at the top of this file can be overridden from
 # the command line with, for example, "make HARDWARE_MOTHERBOARD=71"
 #
 # To compile for RAMPS (atmega2560) with Arduino 1.6.9 at root/arduino you would use...
 #
 #   make ARDUINO_VERSION=10609 AVR_TOOLS_PATH=/root/arduino/hardware/tools/avr/bin/ \
-#   HARDWARE_MOTHERBOARD=33 ARDUINO_INSTALL_DIR=/root/arduino
+#   HARDWARE_MOTHERBOARD=1200 ARDUINO_INSTALL_DIR=/root/arduino
 #
 # To compile and upload simply add "upload" to the end of the line...
 #
 #   make ARDUINO_VERSION=10609 AVR_TOOLS_PATH=/root/arduino/hardware/tools/avr/bin/ \
-#   HARDWARE_MOTHERBOARD=33 ARDUINO_INSTALL_DIR=/root/arduino upload
+#   HARDWARE_MOTHERBOARD=1200 ARDUINO_INSTALL_DIR=/root/arduino upload
 #
 # If uploading doesn't work try adding the parameter "AVRDUDE_PROGRAMMER=wiring" or
 # start upload manually (using stk500) like so:
@@ -57,42 +59,67 @@
 #
 
 # This defines the board to compile for (see boards.h for your board's ID)
-HARDWARE_MOTHERBOARD ?= 11
+HARDWARE_MOTHERBOARD ?= 1020
+
+ifeq ($(OS),Windows_NT)
+  # Windows
+  ARDUINO_INSTALL_DIR ?= ${HOME}/AppData/Local/Arduino
+  ARDUINO_USER_DIR ?= ${HOME}/Documents/Arduino
+else
+  UNAME_S := $(shell uname -s)
+  ifeq ($(UNAME_S),Linux)
+    # Linux
+    ARDUINO_INSTALL_DIR ?= /usr/share/arduino
+    ARDUINO_USER_DIR ?= ${HOME}/Arduino
+  endif
+  ifeq ($(UNAME_S),Darwin)
+    # Darwin (macOS)
+    ARDUINO_INSTALL_DIR ?= /Applications/Arduino.app/Contents/Java
+    ARDUINO_USER_DIR ?= ${HOME}/Documents/Arduino
+    AVR_TOOLS_PATH ?= /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/
+  endif
+endif
 
 # Arduino source install directory, and version number
 # On most linuxes this will be /usr/share/arduino
-ARDUINO_INSTALL_DIR  ?= ${HOME}/Arduino
-ARDUINO_VERSION      ?= 106
+ARDUINO_INSTALL_DIR  ?= ${HOME}/AppData/Local/Arduino       # C:/Users/${USERNAME}/AppData/Local/Arduino
+ARDUINO_VERSION      ?= 10819
 
 # The installed Libraries are in the User folder
-ARDUINO_USER_DIR ?= ${HOME}/Arduino
+ARDUINO_USER_DIR ?= ${HOME}/Documents/Arduino
 
-# You can optionally set a path to the avr-gcc tools. Requires a trailing slash. (ex: /usr/local/avr-gcc/bin)
+# You can optionally set a path to the avr-gcc tools.
+# Requires a trailing slash. For example, /usr/local/avr-gcc/bin/
 AVR_TOOLS_PATH ?=
 
-#Programmer configuration
+# Programmer configuration
 UPLOAD_RATE        ?= 57600
 AVRDUDE_PROGRAMMER ?= arduino
-# on most linuxes this will be /dev/ttyACM0 or /dev/ttyACM1
+# On most linuxes this will be /dev/ttyACM0 or /dev/ttyACM1
 UPLOAD_PORT        ?= /dev/ttyUSB0
 
-#Directory used to build files in, contains all the build files, from object files to the final hex file
-#on linux it is best to put an absolute path like /home/username/tmp .
+# Directory used to build files in, contains all the build files, from object
+# files to the final hex file on linux it is best to put an absolute path
+# like /home/username/tmp .
 BUILD_DIR          ?= applet
 
 # This defines whether Liquid_TWI2 support will be built
 LIQUID_TWI2        ?= 0
 
-# this defines if Wire is needed
+# This defines if Wire is needed
 WIRE               ?= 0
 
-# this defines if U8GLIB is needed (may require RELOC_WORKAROUND)
-U8GLIB             ?= 1
+# This defines if Tone is needed (i.e., SPEAKER is defined in Configuration.h)
+# Disabling this (and SPEAKER) saves approximately 350 bytes of memory.
+TONE               ?= 1
 
-# this defines whether to include the Trinamic TMCStepper library
-TMC                ?= 1
+# This defines if U8GLIB is needed (may require RELOC_WORKAROUND)
+U8GLIB             ?= 0
 
-# this defines whether to include the AdaFruit NeoPixel library
+# This defines whether to include the Trinamic TMCStepper library
+TMC                ?= 0
+
+# This defines whether to include the AdaFruit NeoPixel library
 NEOPIXEL           ?= 0
 
 ############
@@ -105,7 +132,7 @@ CC_MIN:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_MINOR__ | cut -f3 -d\ )
 CC_PATCHLEVEL:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_PATCHLEVEL__ | cut -f3 -d\ )
 CC_VER:=$(shell echo $$(( $(CC_MAJ) * 10000 + $(CC_MIN) * 100 + $(CC_PATCHLEVEL) )))
 ifeq ($(shell test $(CC_VER) -lt 40901 && echo 1),1)
-  @echo This version of GCC is likely broken. Enabling relocation workaround.
+  $(warning This GCC version $(CC_VER) is likely broken. Enabling relocation workaround.)
   RELOC_WORKAROUND = 1
 endif
 
@@ -180,11 +207,11 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1105)
 else ifeq ($(HARDWARE_MOTHERBOARD),1106)
 # MKS BASE v1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1107)
-# MKS v1.4 with A4982 stepper drivers
+# MKS BASE v1.4 with Allegro A4982 stepper drivers
 else ifeq ($(HARDWARE_MOTHERBOARD),1108)
-# MKS v1.5 with Allegro A4982 stepper drivers
+# MKS BASE v1.5 with Allegro A4982 stepper drivers
 else ifeq ($(HARDWARE_MOTHERBOARD),1109)
-# MKS v1.6 with Allegro A4982 stepper drivers
+# MKS BASE v1.6 with Allegro A4982 stepper drivers
 else ifeq ($(HARDWARE_MOTHERBOARD),1110)
 # MKS BASE 1.0 with Heroic HR4982 stepper drivers
 else ifeq ($(HARDWARE_MOTHERBOARD),1111)
@@ -192,92 +219,110 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1111)
 else ifeq ($(HARDWARE_MOTHERBOARD),1112)
 # MKS GEN L
 else ifeq ($(HARDWARE_MOTHERBOARD),1113)
-# zrib V2.0 control board (Chinese knock off RAMPS replica)
-else ifeq ($(HARDWARE_MOTHERBOARD),1114)
 # BigTreeTech or BIQU KFB2.0
+else ifeq ($(HARDWARE_MOTHERBOARD),1114)
+# zrib V2.0 (Chinese RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1115)
-# Felix 2.0+ Electronics Board (RAMPS like)
+# zrib V5.2 (Chinese RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1116)
-# Invent-A-Part RigidBoard
+# Felix 2.0+ Electronics Board (RAMPS like)
 else ifeq ($(HARDWARE_MOTHERBOARD),1117)
-# Invent-A-Part RigidBoard V2
+# Invent-A-Part RigidBoard
 else ifeq ($(HARDWARE_MOTHERBOARD),1118)
-# Sainsmart 2-in-1 board
+# Invent-A-Part RigidBoard V2
 else ifeq ($(HARDWARE_MOTHERBOARD),1119)
-# Ultimaker
+# Sainsmart 2-in-1 board
 else ifeq ($(HARDWARE_MOTHERBOARD),1120)
-# Ultimaker (Older electronics. Pre 1.5.4. This is rare)
+# Ultimaker
 else ifeq ($(HARDWARE_MOTHERBOARD),1121)
-  MCU ?= atmega1280
-
-# Azteeg X3
+# Ultimaker (Older electronics. Pre 1.5.4. This is rare)
 else ifeq ($(HARDWARE_MOTHERBOARD),1122)
-# Azteeg X3 Pro
+  MCU              ?= atmega1280
+  PROG_MCU         ?= m1280
+# Azteeg X3
 else ifeq ($(HARDWARE_MOTHERBOARD),1123)
-# Ultimainboard 2.x (Uses TEMP_SENSOR 20)
+# Azteeg X3 Pro
 else ifeq ($(HARDWARE_MOTHERBOARD),1124)
-# Rumba
+# Ultimainboard 2.x (Uses TEMP_SENSOR 20)
 else ifeq ($(HARDWARE_MOTHERBOARD),1125)
-# Raise3D Rumba
+# Rumba
 else ifeq ($(HARDWARE_MOTHERBOARD),1126)
-# Rapide Lite RL200 Rumba
+# Raise3D N series Rumba derivative
 else ifeq ($(HARDWARE_MOTHERBOARD),1127)
-# Formbot T-Rex 2 Plus
+# Rapide Lite 200 (v1, low-cost RUMBA clone with drv)
 else ifeq ($(HARDWARE_MOTHERBOARD),1128)
-# Formbot T-Rex 3
+# Formbot T-Rex 2 Plus
 else ifeq ($(HARDWARE_MOTHERBOARD),1129)
-# Formbot Raptor
+# Formbot T-Rex 3
 else ifeq ($(HARDWARE_MOTHERBOARD),1130)
-# Formbot Raptor 2
+# Formbot Raptor
 else ifeq ($(HARDWARE_MOTHERBOARD),1131)
-# bq ZUM Mega 3D
+# Formbot Raptor 2
 else ifeq ($(HARDWARE_MOTHERBOARD),1132)
-# MakeBoard Mini v2.1.2 is a control board sold by MicroMake
+# bq ZUM Mega 3D
 else ifeq ($(HARDWARE_MOTHERBOARD),1133)
-# TriGorilla Anycubic version 1.3 based on RAMPS EFB
+# MakeBoard Mini v2.1.2 by MicroMake
 else ifeq ($(HARDWARE_MOTHERBOARD),1134)
-# TriGorilla Anycubic version 1.4 based on RAMPS EFB
+# TriGorilla Anycubic version 1.3-based on RAMPS EFB
 else ifeq ($(HARDWARE_MOTHERBOARD),1135)
-# TriGorilla Anycubic version 1.4 Rev 1.1
+#   ... Ver 1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1136)
-# Creality: Ender-4, CR-8
+#   ... Rev 1.1 (new servo pin order)
 else ifeq ($(HARDWARE_MOTHERBOARD),1137)
-# Creality: CR10S, CR20, CR-X
+# Creality: Ender-4, CR-8
 else ifeq ($(HARDWARE_MOTHERBOARD),1138)
-# Dagoma F5
+# Creality: CR10S, CR20, CR-X
 else ifeq ($(HARDWARE_MOTHERBOARD),1139)
-# FYSETC F6 1.3
+# Dagoma F5
 else ifeq ($(HARDWARE_MOTHERBOARD),1140)
-# FYSETC F6 1.5
+# FYSETC F6 1.3
 else ifeq ($(HARDWARE_MOTHERBOARD),1141)
-# Duplicator i3 Plus
+# FYSETC F6 1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1142)
-# VORON
+# Wanhao Duplicator i3 Plus
 else ifeq ($(HARDWARE_MOTHERBOARD),1143)
-# TRONXY V3 1.0
+# VORON Design
 else ifeq ($(HARDWARE_MOTHERBOARD),1144)
-# Z-Bolt X Series
+# Tronxy TRONXY-V3-1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1145)
-# TT OSCAR
+# Z-Bolt X Series
 else ifeq ($(HARDWARE_MOTHERBOARD),1146)
-# Overlord/Overlord Pro
+# TT OSCAR
 else ifeq ($(HARDWARE_MOTHERBOARD),1147)
-# ADIMLab Gantry v1
+# Overlord/Overlord Pro
 else ifeq ($(HARDWARE_MOTHERBOARD),1148)
-# ADIMLab Gantry v2
+# ADIMLab Gantry v1
 else ifeq ($(HARDWARE_MOTHERBOARD),1149)
-# BIQU Tango V1
+# ADIMLab Gantry v2
 else ifeq ($(HARDWARE_MOTHERBOARD),1150)
-# MKS GEN L V2
+# BIQU Tango V1
 else ifeq ($(HARDWARE_MOTHERBOARD),1151)
-# MKS GEN L V2.1
+# MKS GEN L V2
 else ifeq ($(HARDWARE_MOTHERBOARD),1152)
-# Copymaster 3D
+# MKS GEN L V2.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1153)
-# Ortur 4
+# Copymaster 3D
 else ifeq ($(HARDWARE_MOTHERBOARD),1154)
-# Tenlog D3 Hero
+# Ortur 4
 else ifeq ($(HARDWARE_MOTHERBOARD),1155)
+# Tenlog D3 Hero IDEX printer
+else ifeq ($(HARDWARE_MOTHERBOARD),1156)
+# Tenlog D3,5,6 Pro IDEX printers
+else ifeq ($(HARDWARE_MOTHERBOARD),1157)
+# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend0, Hotend1, Fan, Bed)
+else ifeq ($(HARDWARE_MOTHERBOARD),1158)
+# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend0, Hotend1, Hotend2, Bed)
+else ifeq ($(HARDWARE_MOTHERBOARD),1159)
+# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend, Fan0, Fan1, Bed)
+else ifeq ($(HARDWARE_MOTHERBOARD),1160)
+# Longer LK1 PRO / Alfawise U20 Pro (PRO version)
+else ifeq ($(HARDWARE_MOTHERBOARD),1161)
+# Longer LKx PRO / Alfawise Uxx Pro (PRO version)
+else ifeq ($(HARDWARE_MOTHERBOARD),1162)
+# Zonestar zrib V5.3 (Chinese RAMPS replica)
+else ifeq ($(HARDWARE_MOTHERBOARD),1163)
+# Pxmalion Core I3
+else ifeq ($(HARDWARE_MOTHERBOARD),1164)
 
 #
 # RAMBo and derivatives
@@ -295,6 +340,8 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1203)
 else ifeq ($(HARDWARE_MOTHERBOARD),1204)
 # abee Scoovo X9H
 else ifeq ($(HARDWARE_MOTHERBOARD),1205)
+# Rambo ThinkerV2
+else ifeq ($(HARDWARE_MOTHERBOARD),1206)
 
 #
 # Other ATmega1280, ATmega2560
@@ -328,20 +375,38 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1311)
 else ifeq ($(HARDWARE_MOTHERBOARD),1312)
 # Mega controller
 else ifeq ($(HARDWARE_MOTHERBOARD),1313)
-# Geeetech GT2560 Rev B for Mecreator2
+# Geeetech GT2560 Rev A
 else ifeq ($(HARDWARE_MOTHERBOARD),1314)
-# Geeetech GT2560 Rev. A
+# Geeetech GT2560 Rev A+ (with auto level probe)
 else ifeq ($(HARDWARE_MOTHERBOARD),1315)
-# Geeetech GT2560 Rev. A+ (with auto level probe)
+# Geeetech GT2560 Rev B
 else ifeq ($(HARDWARE_MOTHERBOARD),1316)
-# Geeetech GT2560 Rev B for A10(M/D)
+# Geeetech GT2560 Rev B for A10(M/T/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),1317)
-# Geeetech GT2560 Rev B for A20(M/D)
+# Geeetech GT2560 Rev B for A10(M/T/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),1318)
-# Einstart retrofit
+# Geeetech GT2560 Rev B for Mecreator2
 else ifeq ($(HARDWARE_MOTHERBOARD),1319)
-# Wanhao 0ne+ i3 Mini
+# Geeetech GT2560 Rev B for A20(M/T/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),1320)
+# Einstart retrofit
+else ifeq ($(HARDWARE_MOTHERBOARD),1321)
+# Wanhao 0ne+ i3 Mini
+else ifeq ($(HARDWARE_MOTHERBOARD),1322)
+# Leapfrog Xeed 2015
+else ifeq ($(HARDWARE_MOTHERBOARD),1323)
+# PICA Shield (original version)
+else ifeq ($(HARDWARE_MOTHERBOARD),1324)
+# PICA Shield (rev C or later)
+else ifeq ($(HARDWARE_MOTHERBOARD),1325)
+# Intamsys 4.0 (Funmat HT)
+else ifeq ($(HARDWARE_MOTHERBOARD),1326)
+# Malyan M180 Mainboard Version 2 (no display function, direct G-code only)
+else ifeq ($(HARDWARE_MOTHERBOARD),1327)
+# Geeetech GT2560 Rev B for A20(M/T/D)
+else ifeq ($(HARDWARE_MOTHERBOARD),1328)
+# Mega controller & Protoneer CNC Shield V3.00
+else ifeq ($(HARDWARE_MOTHERBOARD),1329)
 
 #
 # ATmega1281, ATmega2561
@@ -350,9 +415,11 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1320)
 # Minitronics v1.0/1.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1400)
   MCU              ?= atmega1281
+  PROG_MCU         ?= m1281
 # Silvergate v1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1401)
   MCU              ?= atmega1281
+  PROG_MCU         ?= m1281
 
 #
 # Sanguinololu and Derivatives - ATmega644P, ATmega1284P
@@ -362,46 +429,62 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1401)
 else ifeq ($(HARDWARE_MOTHERBOARD),1500)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Sanguinololu 1.2 and above
 else ifeq ($(HARDWARE_MOTHERBOARD),1501)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Melzi
 else ifeq ($(HARDWARE_MOTHERBOARD),1502)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Melzi V2.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1503)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Melzi with ATmega1284 (MaKr3d version)
 else ifeq ($(HARDWARE_MOTHERBOARD),1504)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Melzi Creality3D board (for CR-10 etc)
 else ifeq ($(HARDWARE_MOTHERBOARD),1505)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Melzi Malyan M150 board
 else ifeq ($(HARDWARE_MOTHERBOARD),1506)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Tronxy X5S
 else ifeq ($(HARDWARE_MOTHERBOARD),1507)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # STB V1.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1508)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Azteeg X1
 else ifeq ($(HARDWARE_MOTHERBOARD),1509)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 # Anet 1.0 (Melzi clone)
 else ifeq ($(HARDWARE_MOTHERBOARD),1510)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
+# ZoneStar ZMIB V2
+else ifeq ($(HARDWARE_MOTHERBOARD),1511)
+  HARDWARE_VARIANT ?= Sanguino
+  MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 
 #
 # Other ATmega644P, ATmega644, ATmega1284P
@@ -411,50 +494,61 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1510)
 else ifeq ($(HARDWARE_MOTHERBOARD),1600)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Gen3+
 else ifeq ($(HARDWARE_MOTHERBOARD),1601)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Gen6
 else ifeq ($(HARDWARE_MOTHERBOARD),1602)
   HARDWARE_VARIANT ?= Gen6
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Gen6 deluxe
 else ifeq ($(HARDWARE_MOTHERBOARD),1603)
   HARDWARE_VARIANT ?= Gen6
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Gen7 custom (Alfons3 Version)
 else ifeq ($(HARDWARE_MOTHERBOARD),1604)
   HARDWARE_VARIANT ?= Gen7
   MCU              ?= atmega644
+  PROG_MCU         ?= m644
   F_CPU            ?= 20000000
 # Gen7 v1.1, v1.2
 else ifeq ($(HARDWARE_MOTHERBOARD),1605)
   HARDWARE_VARIANT ?= Gen7
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
   F_CPU            ?= 20000000
 # Gen7 v1.3
 else ifeq ($(HARDWARE_MOTHERBOARD),1606)
   HARDWARE_VARIANT ?= Gen7
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
   F_CPU            ?= 20000000
 # Gen7 v1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1607)
   HARDWARE_VARIANT ?= Gen7
   MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
   F_CPU            ?= 20000000
 # Alpha OMCA board
 else ifeq ($(HARDWARE_MOTHERBOARD),1608)
   HARDWARE_VARIANT ?= SanguinoA
   MCU              ?= atmega644
+  PROG_MCU         ?= m644
 # Final OMCA board
 else ifeq ($(HARDWARE_MOTHERBOARD),1609)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 # Sethi 3D_1
 else ifeq ($(HARDWARE_MOTHERBOARD),1610)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
+  PROG_MCU         ?= m644p
 
 #
 # Teensyduino - AT90USB1286, AT90USB1286P
@@ -464,51 +558,60 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1610)
 else ifeq ($(HARDWARE_MOTHERBOARD),1700)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # Printrboard (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1701)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # Printrboard Revision F (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1702)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # Brainwave (AT90USB646)
 else ifeq ($(HARDWARE_MOTHERBOARD),1703)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb646
+  PROG_MCU         ?= usb646
 # Brainwave Pro (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1704)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # SAV Mk-I (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1705)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # Teensy++2.0 (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1706)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 # 5DPrint D8 Driver Board
 else ifeq ($(HARDWARE_MOTHERBOARD),1707)
   HARDWARE_VARIANT ?= Teensy
   MCU              ?= at90usb1286
+  PROG_MCU         ?= usb1286
 
 # UltiMachine Archim1 (with DRV8825 drivers)
 else ifeq ($(HARDWARE_MOTHERBOARD),3023)
   HARDWARE_VARIANT ?= archim
   MCPU              = cortex-m3
-  F_CPU             = 84000000L
+  F_CPU             = 84000000
   IS_MCU            = 0
 # UltiMachine Archim2 (with TMC2130 drivers)
 else ifeq ($(HARDWARE_MOTHERBOARD),3024)
   HARDWARE_VARIANT ?= archim
   MCPU              = cortex-m3
-  F_CPU             = 84000000L
+  F_CPU             = 84000000
   IS_MCU            = 0
 endif
 
 # Be sure to regenerate speed_lookuptable.h with create_speed_lookuptable.py
 # if you are setting this to something other than 16MHz
+# Do not put the UL suffix, it's done later on.
 # Set to 16Mhz if not yet set.
 F_CPU ?= 16000000
 
@@ -518,7 +621,8 @@ IS_MCU ?= 1
 ifeq ($(IS_MCU),1)
   # Set to arduino, ATmega2560 if not yet set.
   HARDWARE_VARIANT ?= arduino
-  MCU ?= atmega2560
+  MCU              ?= atmega2560
+  PROG_MCU         ?= m2560
 
   TOOL_PREFIX = avr
   MCU_FLAGS   = -mmcu=$(MCU)
@@ -549,36 +653,45 @@ VPATH += $(BUILD_DIR)
 VPATH += $(HARDWARE_SRC)
 
 ifeq ($(HARDWARE_VARIANT), $(filter $(HARDWARE_VARIANT),arduino Teensy Sanguino))
-VPATH += $(ARDUINO_INSTALL_DIR)/hardware/marlin/avr/libraries/LiquidCrystal/src
-VPATH += $(ARDUINO_INSTALL_DIR)/hardware/marlin/avr/libraries/SPI
+  # Old libraries (avr-core 1.6.21 < / Arduino < 1.6.8)
+  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI
+  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/arduino/avr/1.8.6/libraries/SPI/src
 endif
 
 ifeq ($(IS_MCU),1)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/cores/arduino
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/arduino/avr/1.8.6/cores/arduino
 
+  # Old libraries (avr-core 1.6.21 < / Arduino < 1.6.8)
   VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI/src
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SoftwareSerial/src
+  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SoftwareSerial
+  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/arduino/avr/1.8.6/libraries/SPI/src
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/arduino/avr/1.8.6/libraries/SoftwareSerial/src
 endif
 
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidCrystal/src
+
 ifeq ($(LIQUID_TWI2), 1)
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire/utility
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidTWI2
+  WIRE   = 1
+  VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidTWI2
 endif
 ifeq ($(WIRE), 1)
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire/utility
+  # Old libraries (avr-core 1.6.21 / Arduino < 1.6.8)
+  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire
+  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire/utility
+  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/avr/1.8.6/libraries/Wire/src
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/avr/1.8.6/libraries/Wire/src/utility
 endif
 ifeq ($(NEOPIXEL), 1)
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Adafruit_NeoPixel
 endif
 ifeq ($(U8GLIB), 1)
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib/csrc
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib/cppsrc
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib/fntsrc
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib-HAL
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib-HAL/src
+# VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib
+# VPATH += $(ARDUINO_INSTALL_DIR)/libraries/U8glib/src
 endif
 ifeq ($(TMC), 1)
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/TMCStepper/src
@@ -587,9 +700,9 @@ endif
 
 ifeq ($(HARDWARE_VARIANT), arduino)
   HARDWARE_SUB_VARIANT ?= mega
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/variants/$(HARDWARE_SUB_VARIANT)
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/avr/1.8.6/variants/$(HARDWARE_SUB_VARIANT)
 else ifeq ($(HARDWARE_VARIANT), Sanguino)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/marlin/avr/variants/sanguino
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/avr/1.8.6/variants/sanguino
 else ifeq ($(HARDWARE_VARIANT), archim)
   VPATH   += $(ARDUINO_INSTALL_DIR)/packages/ultimachine/hardware/sam/1.6.9-b/system/libsam
   VPATH   += $(ARDUINO_INSTALL_DIR)/packages/ultimachine/hardware/sam/1.6.9-b/system/CMSIS/CMSIS/Include/
@@ -605,7 +718,7 @@ else ifeq ($(HARDWARE_VARIANT), archim)
   LDLIBS   = $(ARDUINO_INSTALL_DIR)/packages/ultimachine/hardware/sam/1.6.9-b/variants/archim/libsam_sam3x8e_gcc_rel.a
 else
   HARDWARE_SUB_VARIANT ?= standard
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/$(HARDWARE_VARIANT)/variants/$(HARDWARE_SUB_VARIANT)
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/avr/1.8.6/variants/$(HARDWARE_SUB_VARIANT)
 endif
 
 LIB_SRC = wiring.c \
@@ -620,7 +733,7 @@ endif
 
 ifeq ($(HARDWARE_VARIANT), Teensy)
   LIB_SRC = wiring.c
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/teensy/cores/teensy
+  VPATH += $(ARDUINO_INSTALL_DIR)/packages/arduino/hardware/teensy/cores/teensy
 endif
 
 LIB_CXXSRC = WMath.cpp WString.cpp Print.cpp SPI.cpp
@@ -641,13 +754,23 @@ ifeq ($(WIRE), 1)
   LIB_CXXSRC += Wire.cpp
 endif
 
+ifeq ($(TONE), 1)
+  LIB_CXXSRC += Tone.cpp
+endif
+
 ifeq ($(U8GLIB), 1)
   LIB_CXXSRC += U8glib.cpp
-  LIB_SRC += u8g_ll_api.c u8g_bitmap.c u8g_clip.c u8g_com_null.c u8g_delay.c u8g_page.c u8g_pb.c u8g_pb16h1.c u8g_rect.c u8g_state.c u8g_font.c u8g_font_6x13.c u8g_font_04b_03.c u8g_font_5x8.c
+  LIB_SRC += u8g_ll_api.c u8g_bitmap.c u8g_clip.c u8g_com_null.c u8g_delay.c \
+    u8g_page.c u8g_pb.c u8g_pb16h1.c u8g_rect.c u8g_state.c u8g_font.c \
+    u8g_font_6x13.c u8g_font_04b_03.c u8g_font_5x8.c
 endif
 
 ifeq ($(TMC), 1)
-  LIB_CXXSRC += TMCStepper.cpp COOLCONF.cpp DRV_STATUS.cpp IHOLD_IRUN.cpp CHOPCONF.cpp GCONF.cpp PWMCONF.cpp DRV_CONF.cpp DRVCONF.cpp DRVCTRL.cpp DRVSTATUS.cpp ENCMODE.cpp RAMP_STAT.cpp SGCSCONF.cpp SHORT_CONF.cpp SMARTEN.cpp SW_MODE.cpp SW_SPI.cpp TMC2130Stepper.cpp TMC2208Stepper.cpp TMC2209Stepper.cpp TMC2660Stepper.cpp TMC5130Stepper.cpp TMC5160Stepper.cpp
+  LIB_CXXSRC += TMCStepper.cpp COOLCONF.cpp DRV_STATUS.cpp IHOLD_IRUN.cpp \
+    CHOPCONF.cpp GCONF.cpp PWMCONF.cpp DRV_CONF.cpp DRVCONF.cpp DRVCTRL.cpp \
+    DRVSTATUS.cpp ENCMODE.cpp RAMP_STAT.cpp SGCSCONF.cpp SHORT_CONF.cpp \
+    SMARTEN.cpp SW_MODE.cpp SW_SPI.cpp TMC2130Stepper.cpp TMC2208Stepper.cpp \
+    TMC2209Stepper.cpp TMC2660Stepper.cpp TMC5130Stepper.cpp TMC5160Stepper.cpp
 endif
 
 ifeq ($(RELOC_WORKAROUND), 1)
@@ -689,17 +812,23 @@ REMOVE = rm -f
 MV = mv -f
 
 # Place -D or -U options here
-CDEFS    = -DF_CPU=$(F_CPU) ${addprefix -D , $(DEFINES)} -DARDUINO=$(ARDUINO_VERSION)
+CDEFS    = -DF_CPU=$(F_CPU)UL ${addprefix -D , $(DEFINES)} -DARDUINO=$(ARDUINO_VERSION)
 CXXDEFS  = $(CDEFS)
 
 ifeq ($(HARDWARE_VARIANT), Teensy)
-  CDEFS  += -DUSB_SERIAL
+  CDEFS      += -DUSB_SERIAL
   LIB_SRC    += usb.c pins_teensy.c
   LIB_CXXSRC += usb_api.cpp
 
 else ifeq ($(HARDWARE_VARIANT), archim)
-  CDEFS      += -DARDUINO_SAM_ARCHIM -DARDUINO_ARCH_SAM -D__SAM3X8E__ -DUSB_VID=0x27b1 -DUSB_PID=0x0001 -DUSBCON '-DUSB_MANUFACTURER="UltiMachine"' '-DUSB_PRODUCT_STRING="Archim"'
-  LIB_CXXSRC += variant.cpp IPAddress.cpp Reset.cpp RingBuffer.cpp Stream.cpp UARTClass.cpp  USARTClass.cpp abi.cpp new.cpp watchdog.cpp CDC.cpp PluggableUSB.cpp USBCore.cpp
+  CDEFS      += -DARDUINO_SAM_ARCHIM -DARDUINO_ARCH_SAM -D__SAM3X8E__
+  CDEFS      += -DUSB_VID=0x27B1 -DUSB_PID=0x0001 -DUSBCON
+  CDEFS      += '-DUSB_MANUFACTURER="UltiMachine"' '-DUSB_PRODUCT_STRING="Archim"'
+
+  LIB_CXXSRC += variant.cpp IPAddress.cpp Reset.cpp RingBuffer.cpp Stream.cpp \
+    UARTClass.cpp  USARTClass.cpp abi.cpp new.cpp watchdog.cpp CDC.cpp \
+    PluggableUSB.cpp USBCore.cpp
+
   LIB_SRC    += cortex_handlers.c iar_calls_sam3.c syscalls_sam3.c dtostrf.c itoa.c
 
   ifeq ($(U8GLIB), 1)
@@ -725,16 +854,20 @@ CTUNING = -fsigned-char -funsigned-bitfields -fno-exceptions \
 ifneq ($(HARDWARE_MOTHERBOARD),)
   CTUNING += -DMOTHERBOARD=${HARDWARE_MOTHERBOARD}
 endif
+
 #CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
 CXXEXTRA = -fno-use-cxa-atexit -fno-threadsafe-statics -fno-rtti
 CFLAGS := $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CEXTRA)   $(CTUNING) $(CSTANDARD)
 CXXFLAGS :=         $(CDEFS) $(CINCS) -O$(OPT) $(CXXEXTRA) $(CTUNING) $(CXXSTANDARD)
 ASFLAGS :=          $(CDEFS)
 #ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
+
 ifeq ($(HARDWARE_VARIANT), archim)
   LD_PREFIX = -Wl,--gc-sections,-Map,Marlin.ino.map,--cref,--check-sections,--entry=Reset_Handler,--unresolved-symbols=report-all,--warn-common,--warn-section-align
   LD_SUFFIX = $(LDLIBS)
-  LDFLAGS   = -lm -T$(LDSCRIPT) -u _sbrk -u link -u _close -u _fstat -u _isatty -u _lseek -u _read -u _write -u _exit -u kill -u _getpid
+
+  LDFLAGS   = -lm -T$(LDSCRIPT) -u _sbrk -u link -u _close -u _fstat -u _isatty
+  LDFLAGS  += -u _lseek -u _read -u _write -u _exit -u kill -u _getpid
 else
   LD_PREFIX = -Wl,--gc-sections,--relax
   LDFLAGS   = -lm
@@ -747,10 +880,10 @@ AVRDUDE_WRITE_FLASH = -Uflash:w:$(BUILD_DIR)/$(TARGET).hex:i
 ifeq ($(shell uname -s), Linux)
   AVRDUDE_CONF = /etc/avrdude/avrdude.conf
 else
-  AVRDUDE_CONF = $(ARDUINO_INSTALL_DIR)/hardware/tools/avr/etc/avrdude.conf
+  AVRDUDE_CONF = $(ARDUINO_INSTALL_DIR)/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf
 endif
 AVRDUDE_FLAGS = -D -C$(AVRDUDE_CONF) \
-  -p$(MCU) -P$(AVRDUDE_PORT) -c$(AVRDUDE_PROGRAMMER) \
+  -p$(PROG_MCU) -P$(AVRDUDE_PORT) -c$(AVRDUDE_PROGRAMMER) \
   -b$(UPLOAD_RATE)
 
 # Since Marlin 2.0, the source files may be distributed into several
@@ -851,7 +984,7 @@ extcoff: $(TARGET).elf
 
 .elf.eep:
 	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
-    --change-section-lma .eeprom=0 -O $(FORMAT) $< $@
+	  --change-section-lma .eeprom=0 -O $(FORMAT) $< $@
 
 # Create extended listing file from ELF output file.
 .elf.lss:
@@ -865,7 +998,7 @@ extcoff: $(TARGET).elf
 
 $(BUILD_DIR)/$(TARGET).elf: $(OBJ) Configuration.h
 	$(Pecho) "  CXX   $@"
-	$P $(CC) $(LD_PREFIX) $(ALL_CXXFLAGS) -o $@ -L. $(OBJ) $(LDFLAGS) $(LD_SUFFIX)
+	$P $(CXX) $(LD_PREFIX) $(ALL_CXXFLAGS) -o $@ -L. $(OBJ) $(LDFLAGS) $(LD_SUFFIX)
 
 # Object files that were found in "src" will be stored in $(BUILD_DIR)
 # in directories that mirror the structure of "src"
@@ -900,5 +1033,5 @@ clean:
 
 .PHONY: all build elf hex eep lss sym program coff extcoff clean depend sizebefore sizeafter
 
-# Automaticaly include the dependency files created by gcc
+# Automatically include the dependency files created by gcc
 -include ${patsubst %.o, %.d, ${OBJ}}

Marlin/Marlin.ino

@@ -2,7 +2,7 @@
 
   Marlin Firmware
 
-  (c) 2011-2020 MarlinFirmware
+  (c) 2011-2024 MarlinFirmware
   Portions of Marlin are (c) by their respective authors.
   All code complies with GPLv2 and/or GPLv3
 
@@ -27,7 +27,7 @@ Configuration
   - https://github.com/MarlinFirmware/Configurations
     Example configurations for several printer models.
 
-  - https://www.youtube.com/watch?v=3gwWVFtdg-4
+  - https://youtu.be/3gwWVFtdg-4
     A good 20-minute overview of Marlin configuration by Tom Sanladerer.
     (Applies to Marlin 1.0.x, so Jerk and Acceleration should be halved.)
     Also... https://www.google.com/search?tbs=vid%3A1&q=configure+marlin

Marlin/Version.h

@@ -28,7 +28,7 @@
 /**
  * Marlin release version identifier
  */
-//#define SHORT_BUILD_VERSION "bugfix-2.0.x"
+//#define SHORT_BUILD_VERSION "bugfix-2.1.x"
 
 /**
  * Verbose version identifier which should contain a reference to the location
@@ -41,7 +41,7 @@
  * here we define this default string as the date where the latest release
  * version was tagged.
  */
-//#define STRING_DISTRIBUTION_DATE "2019-07-10"
+//#define STRING_DISTRIBUTION_DATE "2024-04-08"
 
 /**
  * Defines a generic printer name to be output to the LCD after booting Marlin.
@@ -54,7 +54,7 @@
  * has a distinct Github fork— the Source Code URL should just be the main
  * Marlin repository.
  */
-//#define SOURCE_CODE_URL "https://github.com/MarlinFirmware/Marlin"
+//#define SOURCE_CODE_URL "github.com/MarlinFirmware/Marlin"
 
 /**
  * Default generic printer UUID.
@@ -65,7 +65,7 @@
  * The WEBSITE_URL is the location where users can get more information such as
  * documentation about a specific Marlin release.
  */
-//#define WEBSITE_URL "https://marlinfw.org"
+//#define WEBSITE_URL "marlinfw.org"
 
 /**
  * Set the vendor info the serial USB interface, if changable

Marlin/config.ini

@@ -0,0 +1,247 @@
+#
+# Marlin Firmware
+# config.ini - Options to apply before the build
+#
+[config:base]
+#
+# ini_use_config - A comma-separated list of actions to apply to the Configuration files.
+#                  The actions will be applied in the listed order.
+#  - none
+#    Ignore this file and don't apply any configuration options
+#
+#  - base
+#    Just apply the options in config:base to the configuration
+#
+#  - minimal
+#    Just apply the options in config:minimal to the configuration
+#
+#  - all
+#    Apply all 'config:*' sections in this file to the configuration
+#
+#  - another.ini
+#    Load another INI file with a path relative to this config.ini file (i.e., within Marlin/)
+#
+#  - https://me.myserver.com/path/to/configs
+#    Fetch configurations from any URL.
+#
+#  - example/Creality/Ender-5 Plus @ bugfix-2.1.x
+#    Fetch example configuration files from the MarlinFirmware/Configurations repository
+#    https://raw.githubusercontent.com/MarlinFirmware/Configurations/bugfix-2.1.x/config/examples/Creality/Ender-5%20Plus/
+#
+#  - example/default @ release-2.0.9.7
+#    Fetch default configuration files from the MarlinFirmware/Configurations repository
+#    https://raw.githubusercontent.com/MarlinFirmware/Configurations/release-2.0.9.7/config/default/
+#
+#  - [disable]
+#    Comment out all #defines in both Configuration.h and Configuration_adv.h. This is useful
+#    to start with a clean slate before applying any config: options, so only the options explicitly
+#    set in config.ini will be enabled in the configuration.
+#
+#  - [flatten] (Not yet implemented)
+#    Produce a flattened set of Configuration.h and Configuration_adv.h files with only the enabled
+#    #defines and no comments. A clean look, but context-free.
+#
+ini_use_config                           = none
+
+# Load all config: sections in this file
+;ini_use_config                          = all
+# Disable everything and apply subsequent config:base options
+;ini_use_config                          = [disable], base
+# Load config file relative to Marlin/
+;ini_use_config                          = another.ini
+# Download configurations from GitHub
+;ini_use_config                          = example/Creality/Ender-5 Plus @ bugfix-2.1.x
+# Download configurations from your server
+;ini_use_config                          = https://me.myserver.com/path/to/configs
+# Evaluate config:base and do a config dump
+;ini_use_config                          = base
+;config_export                           = 2
+
+[config:minimal]
+motherboard                              = BOARD_RAMPS_14_EFB
+serial_port                              = 0
+baudrate                                 = 250000
+
+use_watchdog                             = on
+thermal_protection_hotends               = on
+thermal_protection_hysteresis            = 4
+thermal_protection_period                = 40
+
+bufsize                                  = 4
+block_buffer_size                        = 16
+max_cmd_size                             = 96
+
+extruders                                = 1
+temp_sensor_0                            = 1
+
+temp_hysteresis                          = 3
+heater_0_mintemp                         = 5
+heater_0_maxtemp                         = 275
+preheat_1_temp_hotend                    = 180
+
+bang_max                                 = 255
+pidtemp                                  = on
+pid_k1                                   = 0.95
+pid_max                                  = 255
+pid_functional_range                     = 10
+
+default_kp                               = 22.20
+default_ki                               = 1.08
+default_kd                               = 114.00
+
+x_driver_type                            = A4988
+y_driver_type                            = A4988
+z_driver_type                            = A4988
+e0_driver_type                           = A4988
+
+x_bed_size                               = 200
+x_min_pos                                = 0
+x_max_pos                                = X_BED_SIZE
+
+y_bed_size                               = 200
+y_min_pos                                = 0
+y_max_pos                                = Y_BED_SIZE
+
+z_min_pos                                = 0
+z_max_pos                                = 200
+
+x_home_dir                               = -1
+y_home_dir                               = -1
+z_home_dir                               = -1
+
+x_min_endstop_hit_state                  = HIGH
+y_min_endstop_hit_state                  = HIGH
+z_min_endstop_hit_state                  = HIGH
+
+default_axis_steps_per_unit              = { 80, 80, 400, 500 }
+axis_relative_modes                      = { false, false, false, false }
+default_max_feedrate                     = { 300, 300, 5, 25 }
+default_max_acceleration                 = { 3000, 3000, 100, 10000 }
+
+homing_feedrate_mm_m                     = { (50*60), (50*60), (4*60) }
+homing_bump_divisor                      = { 2, 2, 4 }
+
+x_enable_on                              = 0
+y_enable_on                              = 0
+z_enable_on                              = 0
+e_enable_on                              = 0
+
+invert_x_dir                             = false
+invert_y_dir                             = true
+invert_z_dir                             = false
+invert_e0_dir                            = false
+
+step_state_e                             = HIGH
+step_state_x                             = HIGH
+step_state_y                             = HIGH
+step_state_z                             = HIGH
+
+disable_x                                = off
+disable_y                                = off
+disable_z                                = off
+disable_e                                = off
+
+proportional_font_ratio                  = 1.0
+default_nominal_filament_dia             = 1.75
+
+junction_deviation_mm                    = 0.013
+
+default_acceleration                     = 3000
+default_travel_acceleration              = 3000
+default_retract_acceleration             = 3000
+
+default_minimumfeedrate                  = 0.0
+default_mintravelfeedrate                = 0.0
+
+minimum_planner_speed                    = 0.05
+min_steps_per_segment                    = 6
+default_minsegmenttime                   = 20000
+
+[config:basic]
+bed_overshoot                            = 10
+busy_while_heating                       = on
+default_ejerk                            = 5.0
+default_keepalive_interval               = 2
+default_leveling_fade_height             = 0.0
+disable_other_extruders                  = on
+display_charset_hd44780                  = JAPANESE
+eeprom_boot_silent                       = on
+eeprom_chitchat                          = on
+endstoppullups                           = on
+extrude_maxlength                        = 200
+extrude_mintemp                          = 170
+host_keepalive_feature                   = on
+hotend_overshoot                         = 15
+jd_handle_small_segments                 = on
+lcd_info_screen_style                    = 0
+lcd_language                             = en
+max_bed_power                            = 255
+mesh_inset                               = 0
+min_software_endstops                    = on
+max_software_endstops                    = on
+min_software_endstop_x                   = on
+min_software_endstop_y                   = on
+min_software_endstop_z                   = on
+max_software_endstop_x                   = on
+max_software_endstop_y                   = on
+max_software_endstop_z                   = on
+preheat_1_fan_speed                      = 0
+preheat_1_label                          = "PLA"
+preheat_1_temp_bed                       = 70
+prevent_cold_extrusion                   = on
+prevent_lengthy_extrude                  = on
+printjob_timer_autostart                 = on
+probing_margin                           = 10
+show_bootscreen                          = on
+soft_pwm_scale                           = 0
+string_config_h_author                   = "(none, default config)"
+temp_bed_hysteresis                      = 3
+temp_bed_residency_time                  = 10
+temp_bed_window                          = 1
+temp_residency_time                      = 10
+temp_window                              = 1
+validate_homing_endstops                 = on
+xy_probe_feedrate                        = (133*60)
+z_clearance_between_probes               = 5
+z_clearance_deploy_probe                 = 10
+z_clearance_multi_probe                  = 5
+
+[config:advanced]
+arc_support                              = on
+auto_report_temperatures                 = on
+autotemp                                 = on
+autotemp_oldweight                       = 0.98
+bed_check_interval                       = 5000
+default_stepper_timeout_sec              = 120
+default_volumetric_extruder_limit        = 0.00
+disable_idle_x                           = on
+disable_idle_y                           = on
+disable_idle_z                           = on
+disable_idle_e                           = on
+e0_auto_fan_pin                          = -1
+encoder_100x_steps_per_sec               = 80
+encoder_10x_steps_per_sec                = 30
+encoder_rate_multiplier                  = on
+extended_capabilities_report             = on
+extruder_auto_fan_speed                  = 255
+extruder_auto_fan_temperature            = 50
+fanmux0_pin                              = -1
+fanmux1_pin                              = -1
+fanmux2_pin                              = -1
+faster_gcode_parser                      = on
+homing_bump_mm                           = { 5, 5, 2 }
+max_arc_segment_mm                       = 1.0
+min_arc_segment_mm                       = 0.1
+min_circle_segments                      = 72
+n_arc_correction                         = 25
+serial_overrun_protection                = on
+slowdown                                 = on
+slowdown_divisor                         = 2
+temp_sensor_bed                          = 0
+thermal_protection_bed_hysteresis        = 2
+thermocouple_max_errors                  = 15
+tx_buffer_size                           = 0
+watch_bed_temp_increase                  = 2
+watch_bed_temp_period                    = 60
+watch_temp_increase                      = 2
+watch_temp_period                        = 20

Marlin/src/HAL/AVR/HAL.cpp

@@ -23,56 +23,173 @@
 
 #include "../../inc/MarlinConfig.h"
 #include "HAL.h"
+#include <avr/wdt.h>
+
+#ifdef USBCON
+  DefaultSerial1 MSerial0(false, Serial);
+  #ifdef BLUETOOTH
+    BTSerial btSerial(false, bluetoothSerial);
+  #endif
+#endif
 
 // ------------------------
 // Public Variables
 // ------------------------
 
-//uint8_t MCUSR;
+// Don't initialize/override variable (which would happen in .init4)
+uint8_t MarlinHAL::reset_reason __attribute__((section(".noinit")));
 
 // ------------------------
 // Public functions
 // ------------------------
 
-void HAL_init() {
+__attribute__((naked))             // Don't output function pro- and epilogue
+__attribute__((used))              // Output the function, even if "not used"
+__attribute__((section(".init3"))) // Put in an early user definable section
+void save_reset_reason() {
+  #if ENABLED(OPTIBOOT_RESET_REASON)
+    __asm__ __volatile__(
+      A("STS %0, r2")
+      : "=m"(hal.reset_reason)
+    );
+  #else
+    hal.reset_reason = MCUSR;
+  #endif
+
+  // Clear within 16ms since WDRF bit enables a 16ms watchdog timer -> Boot loop
+  hal.clear_reset_source();
+  wdt_disable();
+}
+
+#include "registers.h"
+
+MarlinHAL::MarlinHAL() {
+  TERN_(HAL_AVR_DIRTY_INIT, _ATmega_resetperipherals()); // Clean-wipe the device state.
+}
+
+void MarlinHAL::init() {
   // Init Servo Pins
-  #define INIT_SERVO(N) OUT_WRITE(SERVO##N##_PIN, LOW)
   #if HAS_SERVO_0
-    INIT_SERVO(0);
+    OUT_WRITE(SERVO0_PIN, LOW);
   #endif
   #if HAS_SERVO_1
-    INIT_SERVO(1);
+    OUT_WRITE(SERVO1_PIN, LOW);
   #endif
   #if HAS_SERVO_2
-    INIT_SERVO(2);
+    OUT_WRITE(SERVO2_PIN, LOW);
   #endif
   #if HAS_SERVO_3
-    INIT_SERVO(3);
+    OUT_WRITE(SERVO3_PIN, LOW);
+  #endif
+  #if HAS_SERVO_4
+    OUT_WRITE(SERVO4_PIN, LOW);
+  #endif
+  #if HAS_SERVO_5
+    OUT_WRITE(SERVO5_PIN, LOW);
+  #endif
+
+  init_pwm_timers();   // Init user timers to default frequency - 1000HZ
+
+  #if PIN_EXISTS(BEEPER) && ENABLED(HAL_AVR_DIRTY_INIT) && DISABLED(ATMEGA_NO_BEEPFIX)
+    // Make sure no alternative is locked onto the BEEPER.
+    // This fixes the issue where the ATmega is constantly beeping.
+    // Might disable other peripherals using the pin; to circumvent that please undefine one of the above things!
+    // The true culprit is the AVR ArduinoCore that enables peripherals redundantly.
+    // (USART1 on the GeeeTech GT2560)
+    // https://www.youtube.com/watch?v=jMgCvRXkexk
+    _ATmega_savePinAlternate(BEEPER_PIN);
+
+    OUT_WRITE(BEEPER_PIN, LOW);
   #endif
 }
 
-#if ENABLED(SDSUPPORT)
+void MarlinHAL::reboot() {
+  #if ENABLED(USE_WATCHDOG)
+    while (1) { /* run out the watchdog */ }
+  #else
+    void (*resetFunc)() = 0;  // Declare resetFunc() at address 0
+    resetFunc();              // Jump to address 0
+  #endif
+}
+
+// ------------------------
+// Watchdog Timer
+// ------------------------
+
+#if ENABLED(USE_WATCHDOG)
+
+  #include <avr/wdt.h>
+  #include "../../MarlinCore.h"
+
+  // Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
+  void MarlinHAL::watchdog_init() {
+    #if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
+      #define WDTO_NS WDTO_8S
+    #else
+      #define WDTO_NS WDTO_4S
+    #endif
+    #if ENABLED(WATCHDOG_RESET_MANUAL)
+      // Enable the watchdog timer, but only for the interrupt.
+      // Take care, as this requires the correct order of operation, with interrupts disabled.
+      // See the datasheet of any AVR chip for details.
+      wdt_reset();
+      cli();
+      _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
+      _WD_CONTROL_REG = _BV(WDIE) | (WDTO_NS & 0x07) | ((WDTO_NS & 0x08) << 2); // WDTO_NS directly does not work. bit 0-2 are consecutive in the register but the highest value bit is at bit 5
+                                                                                // So worked for up to WDTO_2S
+      sei();
+      wdt_reset();
+    #else
+      wdt_enable(WDTO_NS); // The function handles the upper bit correct.
+    #endif
+    //delay(10000); // test it!
+  }
+
+  //===========================================================================
+  //=================================== ISR ===================================
+  //===========================================================================
+
+  // Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
+  #if ENABLED(WATCHDOG_RESET_MANUAL)
+    ISR(WDT_vect) {
+      sei();  // With the interrupt driven serial we need to allow interrupts.
+      SERIAL_ERROR_MSG(STR_WATCHDOG_FIRED);
+      minkill();  // interrupt-safe final kill and infinite loop
+    }
+  #endif
+
+  // Reset watchdog. MUST be called at least every 4 seconds after the
+  // first watchdog_init or AVR will go into emergency procedures.
+  void MarlinHAL::watchdog_refresh() { wdt_reset(); }
+
+#endif // USE_WATCHDOG
+
+// ------------------------
+// Free Memory Accessor
+// ------------------------
+
+#if HAS_MEDIA
 
   #include "../../sd/SdFatUtil.h"
   int freeMemory() { return SdFatUtil::FreeRam(); }
 
-#else // !SDSUPPORT
+#else // !HAS_MEDIA
 
-extern "C" {
-  extern char __bss_end;
-  extern char __heap_start;
-  extern void* __brkval;
+  extern "C" {
+    extern char __bss_end;
+    extern char __heap_start;
+    extern void* __brkval;
 
-  int freeMemory() {
-    int free_memory;
-    if ((int)__brkval == 0)
-      free_memory = ((int)&free_memory) - ((int)&__bss_end);
-    else
-      free_memory = ((int)&free_memory) - ((int)__brkval);
-    return free_memory;
+    int freeMemory() {
+      int free_memory;
+      if ((int)__brkval == 0)
+        free_memory = ((int)&free_memory) - ((int)&__bss_end);
+      else
+        free_memory = ((int)&free_memory) - ((int)__brkval);
+      return free_memory;
+    }
   }
-}
 
-#endif // !SDSUPPORT
+#endif // !HAS_MEDIA
 
 #endif // __AVR__

Marlin/src/HAL/AVR/HAL.h

@@ -1,7 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,17 +21,20 @@
  */
 #pragma once
 
+/**
+ * HAL for Arduino AVR
+ */
+
 #include "../shared/Marduino.h"
 #include "../shared/HAL_SPI.h"
 #include "fastio.h"
-#include "watchdog.h"
 #include "math.h"
 
 #ifdef USBCON
   #include <HardwareSerial.h>
 #else
-  #define HardwareSerial_h // Hack to prevent HardwareSerial.h header inclusion
   #include "MarlinSerial.h"
+  #define BOARD_NO_NATIVE_USB
 #endif
 
 #include <stdint.h>
@@ -39,6 +44,19 @@
 #include <avr/interrupt.h>
 #include <avr/io.h>
 
+//
+// Default graphical display delays
+//
+#if F_CPU >= 20000000
+  #define CPU_ST7920_DELAY_1 150
+  #define CPU_ST7920_DELAY_2   0
+  #define CPU_ST7920_DELAY_3 150
+#elif F_CPU == 16000000
+  #define CPU_ST7920_DELAY_1 125
+  #define CPU_ST7920_DELAY_2   0
+  #define CPU_ST7920_DELAY_3 188
+#endif
+
 #ifndef pgm_read_ptr
   // Compatibility for avr-libc 1.8.0-4.1 included with Ubuntu for
   // Windows Subsystem for Linux on Windows 10 as of 10/18/2019
@@ -61,9 +79,9 @@
   #define CRITICAL_SECTION_START()  unsigned char _sreg = SREG; cli()
   #define CRITICAL_SECTION_END()    SREG = _sreg
 #endif
-#define ISRS_ENABLED() TEST(SREG, SREG_I)
-#define ENABLE_ISRS()  sei()
-#define DISABLE_ISRS() cli()
+
+#define HAL_CAN_SET_PWM_FREQ   // This HAL supports PWM Frequency adjustment
+#define PWM_FREQUENCY 1000     // Default PWM frequency when set_pwm_duty() is called without set_pwm_frequency()
 
 // ------------------------
 // Types
@@ -71,94 +89,77 @@
 
 typedef int8_t pin_t;
 
-#define SHARED_SERVOS HAS_SERVOS
-#define HAL_SERVO_LIB Servo
+#define SHARED_SERVOS HAS_SERVOS  // Use shared/servos.cpp
+
+class Servo;
+typedef Servo hal_servo_t;
 
 // ------------------------
-// Public Variables
-// ------------------------
-
-//extern uint8_t MCUSR;
-
 // Serial ports
+// ------------------------
+
 #ifdef USBCON
-  #define MYSERIAL0 TERN(BLUETOOTH, bluetoothSerial, Serial)
-#else
-  #if !WITHIN(SERIAL_PORT, -1, 3)
-    #error "SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #include "../../core/serial_hook.h"
+  typedef ForwardSerial1Class< decltype(Serial) > DefaultSerial1;
+  extern DefaultSerial1 MSerial0;
+  #ifdef BLUETOOTH
+    typedef ForwardSerial1Class< decltype(bluetoothSerial) > BTSerial;
+    extern BTSerial btSerial;
   #endif
-  #define MYSERIAL0 customizedSerial1
+
+  #define MYSERIAL1 TERN(BLUETOOTH, btSerial, MSerial0)
+#else
+  #if !WITHIN(SERIAL_PORT, 0, 3)
+    #error "SERIAL_PORT must be from 0 to 3."
+  #endif
+  #define MYSERIAL1 customizedSerial1
 
   #ifdef SERIAL_PORT_2
-    #if !WITHIN(SERIAL_PORT_2, -1, 3)
-      #error "SERIAL_PORT_2 must be from -1 to 3. Please update your configuration."
+    #if !WITHIN(SERIAL_PORT_2, 0, 3)
+      #error "SERIAL_PORT_2 must be from 0 to 3."
     #endif
-    #define MYSERIAL1 customizedSerial2
+    #define MYSERIAL2 customizedSerial2
   #endif
+
+  #ifdef SERIAL_PORT_3
+    #if !WITHIN(SERIAL_PORT_3, 0, 3)
+      #error "SERIAL_PORT_3 must be from 0 to 3."
+    #endif
+    #define MYSERIAL3 customizedSerial3
+  #endif
+#endif
+
+#ifdef MMU2_SERIAL_PORT
+  #if !WITHIN(MMU2_SERIAL_PORT, 0, 3)
+    #error "MMU2_SERIAL_PORT must be from 0 to 3"
+  #endif
+  #define MMU2_SERIAL mmuSerial
 #endif
 
 #ifdef LCD_SERIAL_PORT
-  #if !WITHIN(LCD_SERIAL_PORT, -1, 3)
-    #error "LCD_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #if !WITHIN(LCD_SERIAL_PORT, 0, 3)
+    #error "LCD_SERIAL_PORT must be from 0 to 3."
   #endif
   #define LCD_SERIAL lcdSerial
   #if HAS_DGUS_LCD
-    #define SERIAL_GET_TX_BUFFER_FREE() LCD_SERIAL.get_tx_buffer_free()
+    #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.get_tx_buffer_free()
   #endif
 #endif
 
-// ------------------------
-// Public functions
-// ------------------------
-
-void HAL_init();
-
-//void cli();
-
-//void _delay_ms(const int delay);
-
-inline void HAL_clear_reset_source() { MCUSR = 0; }
-inline uint8_t HAL_get_reset_source() { return MCUSR; }
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-function"
-extern "C" {
-  int freeMemory();
-}
-#pragma GCC diagnostic pop
-
+//
 // ADC
-#ifdef DIDR2
-  #define HAL_ANALOG_SELECT(ind) do{ if (ind < 8) SBI(DIDR0, ind); else SBI(DIDR2, ind & 0x07); }while(0)
-#else
-  #define HAL_ANALOG_SELECT(ind) SBI(DIDR0, ind);
-#endif
-
-inline void HAL_adc_init() {
-  ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
-  DIDR0 = 0;
-  #ifdef DIDR2
-    DIDR2 = 0;
-  #endif
-}
-
-#define SET_ADMUX_ADCSRA(ch) ADMUX = _BV(REFS0) | (ch & 0x07); SBI(ADCSRA, ADSC)
-#ifdef MUX5
-  #define HAL_START_ADC(ch) if (ch > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
-#else
-  #define HAL_START_ADC(ch) ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
-#endif
-
-#define HAL_ADC_VREF        5.0
-#define HAL_ADC_RESOLUTION 10
-#define HAL_READ_ADC()  ADC
-#define HAL_ADC_READY() !TEST(ADCSRA, ADSC)
+//
+#define HAL_ADC_VREF_MV   5000
+#define HAL_ADC_RESOLUTION  10
 
+//
+// Pin Mapping for M42, M43, M226
+//
 #define GET_PIN_MAP_PIN(index) index
 #define GET_PIN_MAP_INDEX(pin) pin
 #define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
 
-#define HAL_SENSITIVE_PINS 0, 1
+#define HAL_SENSITIVE_PINS 0, 1,
 
 #ifdef __AVR_AT90USB1286__
   #define JTAG_DISABLE() do{ MCUCR = 0x80; MCUCR = 0x80; }while(0)
@@ -167,23 +168,113 @@ inline void HAL_adc_init() {
 // AVR compatibility
 #define strtof strtod
 
-#define HAL_CAN_SET_PWM_FREQ   // This HAL supports PWM Frequency adjustment
+// ------------------------
+// Free Memory Accessor
+// ------------------------
 
-/**
- *  set_pwm_frequency
- *  Sets the frequency of the timer corresponding to the provided pin
- *  as close as possible to the provided desired frequency. Internally
- *  calculates the required waveform generation mode, prescaler and
- *  resolution values required and sets the timer registers accordingly.
- *  NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
- *  NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST FAN PWM Settings)
- */
-void set_pwm_frequency(const pin_t pin, int f_desired);
+#pragma GCC diagnostic push
+#if GCC_VERSION <= 50000
+  #pragma GCC diagnostic ignored "-Wunused-function"
+#endif
 
-/**
- * set_pwm_duty
- *  Sets the PWM duty cycle of the provided pin to the provided value
- *  Optionally allows inverting the duty cycle [default = false]
- *  Optionally allows changing the maximum size of the provided value to enable finer PWM duty control [default = 255]
- */
-void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
+extern "C" int freeMemory();
+
+#pragma GCC diagnostic pop
+
+// ------------------------
+// MarlinHAL Class
+// ------------------------
+
+class MarlinHAL {
+public:
+
+  // Earliest possible init, before setup()
+  MarlinHAL();
+
+  // Watchdog
+  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
+  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
+
+  static void init();          // Called early in setup()
+  static void init_board() {}  // Called less early in setup()
+  static void reboot();        // Restart the firmware from 0x0
+
+  // Interrupts
+  static bool isr_state() { return TEST(SREG, SREG_I); }
+  static void isr_on()  { sei(); }
+  static void isr_off() { cli(); }
+
+  static void delay_ms(const int ms) { _delay_ms(ms); }
+
+  // Tasks, called from idle()
+  static void idletask() {}
+
+  // Reset
+  static uint8_t reset_reason;
+  static uint8_t get_reset_source() { return reset_reason; }
+  static void clear_reset_source() { MCUSR = 0; }
+
+  // Free SRAM
+  static int freeMemory() { return ::freeMemory(); }
+
+  //
+  // ADC Methods
+  //
+
+  // Called by Temperature::init once at startup
+  static void adc_init() {
+    ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
+    DIDR0 = 0;
+    #ifdef DIDR2
+      DIDR2 = 0;
+    #endif
+  }
+
+  // Called by Temperature::init for each sensor at startup
+  static void adc_enable(const uint8_t ch) {
+    #ifdef DIDR2
+      if (ch > 7) { SBI(DIDR2, ch & 0x07); return; }
+    #endif
+    SBI(DIDR0, ch);
+  }
+
+  // Begin ADC sampling on the given channel. Called from Temperature::isr!
+  static void adc_start(const uint8_t ch) {
+    #ifdef MUX5
+      ADCSRB = ch > 7 ? _BV(MUX5) : 0;
+    #else
+      ADCSRB = 0;
+    #endif
+    ADMUX = _BV(REFS0) | (ch & 0x07);
+    SBI(ADCSRA, ADSC);
+  }
+
+  // Is the ADC ready for reading?
+  static bool adc_ready() { return !TEST(ADCSRA, ADSC); }
+
+  // The current value of the ADC register
+  static __typeof__(ADC) adc_value() { return ADC; }
+
+  /**
+   * init_pwm_timers
+   * Set the default frequency for timers 2-5 to 1000HZ
+   */
+  static void init_pwm_timers();
+
+  /**
+   * Set the PWM duty cycle for the pin to the given value.
+   * Optionally invert the duty cycle [default = false]
+   * Optionally change the scale of the provided value to enable finer PWM duty control [default = 255]
+   */
+  static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
+
+  /**
+   * Set the frequency of the timer for the given pin as close as
+   * possible to the provided desired frequency. Internally calculate
+   * the required waveform generation mode, prescaler, and resolution
+   * values and set timer registers accordingly.
+   * NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
+   * NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST_PWM_FAN Settings)
+   */
+  static void set_pwm_frequency(const pin_t pin, const uint16_t f_desired);
+};

Marlin/src/HAL/AVR/HAL_SPI.cpp

@@ -34,21 +34,21 @@
 #include "../../inc/MarlinConfig.h"
 
 void spiBegin() {
-  OUT_WRITE(SS_PIN, HIGH);
-  SET_OUTPUT(SCK_PIN);
-  SET_INPUT(MISO_PIN);
-  SET_OUTPUT(MOSI_PIN);
-
-  #if DISABLED(SOFTWARE_SPI)
-    // SS must be in output mode even it is not chip select
-    //SET_OUTPUT(SS_PIN);
-    // set SS high - may be chip select for another SPI device
-    //#if SET_SPI_SS_HIGH
-      //WRITE(SS_PIN, HIGH);
-    //#endif
-    // set a default rate
-    spiInit(1);
+  #if PIN_EXISTS(SD_SS)
+    // Do not init HIGH for boards with pin 4 used as Fans or Heaters or otherwise, not likely to have multiple SPI devices anyway.
+    #if defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
+      // SS must be in output mode even it is not chip select
+      SET_OUTPUT(SD_SS_PIN);
+    #else
+      // set SS high - may be chip select for another SPI device
+      OUT_WRITE(SD_SS_PIN, HIGH);
+    #endif
   #endif
+  SET_OUTPUT(SD_SCK_PIN);
+  SET_INPUT(SD_MISO_PIN);
+  SET_OUTPUT(SD_MOSI_PIN);
+
+  IF_DISABLED(SOFTWARE_SPI, spiInit(SPI_HALF_SPEED));
 }
 
 #if NONE(SOFTWARE_SPI, FORCE_SOFT_SPI)
@@ -74,7 +74,8 @@ void spiBegin() {
       #elif defined(PRR0)
         PRR0
       #endif
-        , PRSPI);
+      , PRSPI
+    );
 
     SPCR = _BV(SPE) | _BV(MSTR) | (spiRate >> 1);
     SPSR = spiRate & 1 || spiRate == 6 ? 0 : _BV(SPI2X);
@@ -88,7 +89,7 @@ void spiBegin() {
   }
 
   /** SPI read data  */
-  void spiRead(uint8_t* buf, uint16_t nbyte) {
+  void spiRead(uint8_t *buf, uint16_t nbyte) {
     if (nbyte-- == 0) return;
     SPDR = 0xFF;
     for (uint16_t i = 0; i < nbyte; i++) {
@@ -107,7 +108,7 @@ void spiBegin() {
   }
 
   /** SPI send block  */
-  void spiSendBlock(uint8_t token, const uint8_t* buf) {
+  void spiSendBlock(uint8_t token, const uint8_t *buf) {
     SPDR = token;
     for (uint16_t i = 0; i < 512; i += 2) {
       while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
@@ -118,7 +119,6 @@ void spiBegin() {
     while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
   }
 
-
   /** begin spi transaction */
   void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
     // Based on Arduino SPI library
@@ -174,7 +174,6 @@ void spiBegin() {
     SPSR = clockDiv | 0x01;
   }
 
-
 #else // SOFTWARE_SPI || FORCE_SOFT_SPI
 
   // ------------------------
@@ -195,19 +194,19 @@ void spiBegin() {
     // no interrupts during byte receive - about 8µs
     cli();
     // output pin high - like sending 0xFF
-    WRITE(MOSI_PIN, HIGH);
+    WRITE(SD_MOSI_PIN, HIGH);
 
-    LOOP_L_N(i, 8) {
-      WRITE(SCK_PIN, HIGH);
+    for (uint8_t i = 0; i < 8; ++i) {
+      WRITE(SD_SCK_PIN, HIGH);
 
       nop; // adjust so SCK is nice
       nop;
 
       data <<= 1;
 
-      if (READ(MISO_PIN)) data |= 1;
+      if (READ(SD_MISO_PIN)) data |= 1;
 
-      WRITE(SCK_PIN, LOW);
+      WRITE(SD_SCK_PIN, LOW);
     }
 
     sei();
@@ -215,7 +214,7 @@ void spiBegin() {
   }
 
   // Soft SPI read data
-  void spiRead(uint8_t* buf, uint16_t nbyte) {
+  void spiRead(uint8_t *buf, uint16_t nbyte) {
     for (uint16_t i = 0; i < nbyte; i++)
       buf[i] = spiRec();
   }
@@ -224,11 +223,11 @@ void spiBegin() {
   void spiSend(uint8_t data) {
     // no interrupts during byte send - about 8µs
     cli();
-    LOOP_L_N(i, 8) {
-      WRITE(SCK_PIN, LOW);
-      WRITE(MOSI_PIN, data & 0x80);
+    for (uint8_t i = 0; i < 8; ++i) {
+      WRITE(SD_SCK_PIN, LOW);
+      WRITE(SD_MOSI_PIN, data & 0x80);
       data <<= 1;
-      WRITE(SCK_PIN, HIGH);
+      WRITE(SD_SCK_PIN, HIGH);
     }
 
     nop; // hold SCK high for a few ns
@@ -236,13 +235,13 @@ void spiBegin() {
     nop;
     nop;
 
-    WRITE(SCK_PIN, LOW);
+    WRITE(SD_SCK_PIN, LOW);
 
     sei();
   }
 
   // Soft SPI send block
-  void spiSendBlock(uint8_t token, const uint8_t* buf) {
+  void spiSendBlock(uint8_t token, const uint8_t *buf) {
     spiSend(token);
     for (uint16_t i = 0; i < 512; i++)
       spiSend(buf[i]);

Marlin/src/HAL/AVR/MarlinSPI.h

@@ -1,6 +1,6 @@
 /**
  * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
  * Based on Sprinter and grbl.
  * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -21,5 +21,6 @@
  */
 #pragma once
 
-void watchdog_init();
-void HAL_watchdog_refresh();
+#include <SPI.h>
+
+using MarlinSPI = SPIClass;

Marlin/src/HAL/AVR/MarlinSerial.cpp

@@ -486,7 +486,7 @@ void MarlinSerial<Cfg>::write(const uint8_t c) {
     const uint8_t i = (tx_buffer.head + 1) & (Cfg::TX_SIZE - 1);
 
     // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!ISRS_ENABLED()) {
+    if (!hal.isr_state()) {
 
       // Make room by polling if it is possible to transmit, and do so!
       while (i == tx_buffer.tail) {
@@ -534,7 +534,7 @@ void MarlinSerial<Cfg>::flushTX() {
     if (!_written) return;
 
     // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!ISRS_ENABLED()) {
+    if (!hal.isr_state()) {
 
       // Wait until everything was transmitted - We must do polling, as interrupts are disabled
       while (tx_buffer.head != tx_buffer.tail || !B_TXC) {
@@ -556,161 +556,6 @@ void MarlinSerial<Cfg>::flushTX() {
   }
 }
 
-/**
- * Imports from print.h
- */
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(char c, int base) {
-  print((long)c, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned char b, int base) {
-  print((unsigned long)b, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(int n, int base) {
-  print((long)n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned int n, int base) {
-  print((unsigned long)n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(long n, int base) {
-  if (base == 0) write(n);
-  else if (base == 10) {
-    if (n < 0) { print('-'); n = -n; }
-    printNumber(n, 10);
-  }
-  else
-    printNumber(n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned long n, int base) {
-  if (base == 0) write(n);
-  else printNumber(n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(double n, int digits) {
-  printFloat(n, digits);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println() {
-  print('\r');
-  print('\n');
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(const String& s) {
-  print(s);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(const char c[]) {
-  print(c);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(char c, int base) {
-  print(c, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned char b, int base) {
-  print(b, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(int n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned int n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(long n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned long n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(double n, int digits) {
-  print(n, digits);
-  println();
-}
-
-// Private Methods
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::printNumber(unsigned long n, uint8_t base) {
-  if (n) {
-    unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
-    int8_t i = 0;
-    while (n) {
-      buf[i++] = n % base;
-      n /= base;
-    }
-    while (i--)
-      print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
-  }
-  else
-    print('0');
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::printFloat(double number, uint8_t digits) {
-  // Handle negative numbers
-  if (number < 0.0) {
-    print('-');
-    number = -number;
-  }
-
-  // Round correctly so that print(1.999, 2) prints as "2.00"
-  double rounding = 0.5;
-  LOOP_L_N(i, digits) rounding *= 0.1;
-  number += rounding;
-
-  // Extract the integer part of the number and print it
-  unsigned long int_part = (unsigned long)number;
-  double remainder = number - (double)int_part;
-  print(int_part);
-
-  // Print the decimal point, but only if there are digits beyond
-  if (digits) {
-    print('.');
-    // Extract digits from the remainder one at a time
-    while (digits--) {
-      remainder *= 10.0;
-      int toPrint = int(remainder);
-      print(toPrint);
-      remainder -= toPrint;
-    }
-  }
-}
-
 // Hookup ISR handlers
 ISR(SERIAL_REGNAME(USART, SERIAL_PORT, _RX_vect)) {
   MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::store_rxd_char();
@@ -720,11 +565,9 @@ ISR(SERIAL_REGNAME(USART, SERIAL_PORT, _UDRE_vect)) {
   MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::_tx_udr_empty_irq();
 }
 
-// Preinstantiate
-template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;
-
-// Instantiate
-MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+// Because of the template definition above, it's required to instantiate the template to have all methods generated
+template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT> >;
+MSerialT1 customizedSerial1(MSerialT1::HasEmergencyParser);
 
 #ifdef SERIAL_PORT_2
 
@@ -737,13 +580,26 @@ MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
     MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>::_tx_udr_empty_irq();
   }
 
-  // Preinstantiate
-  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;
+  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> >;
+  MSerialT2 customizedSerial2(MSerialT2::HasEmergencyParser);
 
-  // Instantiate
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
+#endif // SERIAL_PORT_2
 
-#endif
+#ifdef SERIAL_PORT_3
+
+  // Hookup ISR handlers
+  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_3, _RX_vect)) {
+    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_3>>::store_rxd_char();
+  }
+
+  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_3, _UDRE_vect)) {
+    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_3>>::_tx_udr_empty_irq();
+  }
+
+  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> >;
+  MSerialT3 customizedSerial3(MSerialT3::HasEmergencyParser);
+
+#endif // SERIAL_PORT_3
 
 #ifdef MMU2_SERIAL_PORT
 
@@ -755,13 +611,10 @@ MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
     MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::_tx_udr_empty_irq();
   }
 
-  // Preinstantiate
-  template class MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>;
+  template class MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> >;
+  MSerialMMU2 mmuSerial(MSerialMMU2::HasEmergencyParser);
 
-  // Instantiate
-  MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>> mmuSerial;
-
-#endif
+#endif // MMU2_SERIAL_PORT
 
 #ifdef LCD_SERIAL_PORT
 
@@ -773,11 +626,8 @@ MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
     MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>>::_tx_udr_empty_irq();
   }
 
-  // Preinstantiate
-  template class MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>>;
-
-  // Instantiate
-  MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>> lcdSerial;
+  template class MarlinSerial< LCDSerialCfg<LCD_SERIAL_PORT> >;
+  MSerialLCD lcdSerial(MSerialLCD::HasEmergencyParser);
 
   #if HAS_DGUS_LCD
     template<typename Cfg>
@@ -790,13 +640,13 @@ MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
     }
   #endif
 
-#endif
+#endif // LCD_SERIAL_PORT
 
 #endif // !USBCON && (UBRRH || UBRR0H || UBRR1H || UBRR2H || UBRR3H)
 
 // For AT90USB targets use the UART for BT interfacing
 #if defined(USBCON) && ENABLED(BLUETOOTH)
-  HardwareSerial bluetoothSerial;
+  MSerialBT bluetoothSerial(false);
 #endif
 
 #endif // __AVR__

Marlin/src/HAL/AVR/MarlinSerial.h

@@ -34,10 +34,8 @@
 #include <WString.h>
 
 #include "../../inc/MarlinConfigPre.h"
-
-#ifndef SERIAL_PORT
-  #define SERIAL_PORT 0
-#endif
+#include "../../core/types.h"
+#include "../../core/serial_hook.h"
 
 #ifndef USBCON
 
@@ -135,16 +133,8 @@
     UART_DECL(3);
   #endif
 
-  #define DEC 10
-  #define HEX 16
-  #define OCT 8
-  #define BIN 2
   #define BYTE 0
 
-  // Templated type selector
-  template<bool b, typename T, typename F> struct TypeSelector { typedef T type;} ;
-  template<typename T, typename F> struct TypeSelector<false, T, F> { typedef F type; };
-
   template<typename Cfg>
   class MarlinSerial {
   protected:
@@ -167,7 +157,7 @@
     static constexpr B_U2Xx<Cfg::PORT>   B_U2X   = 0;
 
     // Base size of type on buffer size
-    typedef typename TypeSelector<(Cfg::RX_SIZE>256), uint16_t, uint8_t>::type ring_buffer_pos_t;
+    typedef uvalue_t(Cfg::RX_SIZE - 1) ring_buffer_pos_t;
 
     struct ring_buffer_r {
       volatile ring_buffer_pos_t head, tail;
@@ -194,68 +184,38 @@
                    rx_framing_errors;
     static ring_buffer_pos_t rx_max_enqueued;
 
-    static FORCE_INLINE ring_buffer_pos_t atomic_read_rx_head();
+    FORCE_INLINE static ring_buffer_pos_t atomic_read_rx_head();
 
     static volatile bool rx_tail_value_not_stable;
     static volatile uint16_t rx_tail_value_backup;
 
-    static FORCE_INLINE void atomic_set_rx_tail(ring_buffer_pos_t value);
-    static FORCE_INLINE ring_buffer_pos_t atomic_read_rx_tail();
-
-    public:
+    FORCE_INLINE static void atomic_set_rx_tail(ring_buffer_pos_t value);
+    FORCE_INLINE static ring_buffer_pos_t atomic_read_rx_tail();
 
+  public:
     FORCE_INLINE static void store_rxd_char();
     FORCE_INLINE static void _tx_udr_empty_irq();
 
-    public:
-      MarlinSerial() {};
-      static void begin(const long);
-      static void end();
-      static int peek();
-      static int read();
-      static void flush();
-      static ring_buffer_pos_t available();
-      static void write(const uint8_t c);
-      static void flushTX();
-      #if HAS_DGUS_LCD
-        static ring_buffer_pos_t get_tx_buffer_free();
-      #endif
+  public:
+    static void begin(const long);
+    static void end();
+    static int peek();
+    static int read();
+    static void flush();
+    static ring_buffer_pos_t available();
+    static void write(const uint8_t c);
+    static void flushTX();
+    #if HAS_DGUS_LCD
+      static ring_buffer_pos_t get_tx_buffer_free();
+    #endif
 
-      static inline bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
+    enum { HasEmergencyParser = Cfg::EMERGENCYPARSER };
+    static bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
 
-      FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
-      FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
-      FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
-      FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
-
-      FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
-      FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
-      FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
-      FORCE_INLINE static void print(const char* str) { write(str); }
-
-      static void print(char, int = BYTE);
-      static void print(unsigned char, int = BYTE);
-      static void print(int, int = DEC);
-      static void print(unsigned int, int = DEC);
-      static void print(long, int = DEC);
-      static void print(unsigned long, int = DEC);
-      static void print(double, int = 2);
-
-      static void println(const String& s);
-      static void println(const char[]);
-      static void println(char, int = BYTE);
-      static void println(unsigned char, int = BYTE);
-      static void println(int, int = DEC);
-      static void println(unsigned int, int = DEC);
-      static void println(long, int = DEC);
-      static void println(unsigned long, int = DEC);
-      static void println(double, int = 2);
-      static void println();
-      operator bool() { return true; }
-
-    private:
-      static void printNumber(unsigned long, const uint8_t);
-      static void printFloat(double, uint8_t);
+    FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
+    FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
+    FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
+    FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
   };
 
   template <uint8_t serial>
@@ -270,12 +230,18 @@
     static constexpr bool RX_FRAMING_ERRORS = ENABLED(SERIAL_STATS_RX_FRAMING_ERRORS);
     static constexpr bool MAX_RX_QUEUED     = ENABLED(SERIAL_STATS_MAX_RX_QUEUED);
   };
-  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+
+  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT> > > MSerialT1;
+  extern MSerialT1 customizedSerial1;
 
   #ifdef SERIAL_PORT_2
+    typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> > > MSerialT2;
+    extern MSerialT2 customizedSerial2;
+  #endif
 
-    extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
-
+  #ifdef SERIAL_PORT_3
+    typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> > > MSerialT3;
+    extern MSerialT3 customizedSerial3;
   #endif
 
 #endif // !USBCON
@@ -284,49 +250,41 @@
   template <uint8_t serial>
   struct MMU2SerialCfg {
     static constexpr int PORT               = serial;
+    static constexpr unsigned int RX_SIZE   = 32;
+    static constexpr unsigned int TX_SIZE   = 32;
     static constexpr bool XONOFF            = false;
     static constexpr bool EMERGENCYPARSER   = false;
     static constexpr bool DROPPED_RX        = false;
     static constexpr bool RX_FRAMING_ERRORS = false;
     static constexpr bool MAX_RX_QUEUED     = false;
-    static constexpr unsigned int RX_SIZE   = 32;
-    static constexpr unsigned int TX_SIZE   = 32;
     static constexpr bool RX_OVERRUNS       = false;
   };
 
-  extern MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>> mmuSerial;
+  typedef Serial1Class< MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> > > MSerialMMU2;
+  extern MSerialMMU2 mmuSerial;
 #endif
 
 #ifdef LCD_SERIAL_PORT
 
   template <uint8_t serial>
   struct LCDSerialCfg {
-    static constexpr int PORT                 = serial;
-    static constexpr bool XONOFF              = false;
-    static constexpr bool EMERGENCYPARSER     = ENABLED(EMERGENCY_PARSER);
-    static constexpr bool DROPPED_RX          = false;
-    static constexpr bool RX_FRAMING_ERRORS   = false;
-    static constexpr bool MAX_RX_QUEUED       = false;
-    #if HAS_DGUS_LCD
-      static constexpr unsigned int RX_SIZE   = DGUS_RX_BUFFER_SIZE;
-      static constexpr unsigned int TX_SIZE   = DGUS_TX_BUFFER_SIZE;
-      static constexpr bool RX_OVERRUNS       = ENABLED(SERIAL_STATS_RX_BUFFER_OVERRUNS);
-    #elif EITHER(ANYCUBIC_LCD_I3MEGA, ANYCUBIC_LCD_CHIRON)
-      static constexpr unsigned int RX_SIZE   = 64;
-      static constexpr unsigned int TX_SIZE   = 128;
-      static constexpr bool RX_OVERRUNS       = false;
-    #else
-      static constexpr unsigned int RX_SIZE   = 64;
-      static constexpr unsigned int TX_SIZE   = 128;
-      static constexpr bool RX_OVERRUNS       = false
-    #endif
+    static constexpr int PORT               = serial;
+    static constexpr unsigned int RX_SIZE   = TERN(HAS_DGUS_LCD, DGUS_RX_BUFFER_SIZE,  64);
+    static constexpr unsigned int TX_SIZE   = TERN(HAS_DGUS_LCD, DGUS_TX_BUFFER_SIZE, 128);
+    static constexpr bool XONOFF            = false;
+    static constexpr bool EMERGENCYPARSER   = ENABLED(EMERGENCY_PARSER);
+    static constexpr bool DROPPED_RX        = false;
+    static constexpr bool RX_FRAMING_ERRORS = false;
+    static constexpr bool MAX_RX_QUEUED     = false;
+    static constexpr bool RX_OVERRUNS       = ALL(HAS_DGUS_LCD, SERIAL_STATS_RX_BUFFER_OVERRUNS);
   };
 
-  extern MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>> lcdSerial;
-
+  typedef Serial1Class< MarlinSerial< LCDSerialCfg<LCD_SERIAL_PORT> > > MSerialLCD;
+  extern MSerialLCD lcdSerial;
 #endif
 
 // Use the UART for Bluetooth in AT90USB configurations
 #if defined(USBCON) && ENABLED(BLUETOOTH)
-  extern HardwareSerial bluetoothSerial;
+  typedef Serial1Class<HardwareSerial> MSerialBT;
+  extern MSerialBT bluetoothSerial;
 #endif

Marlin/src/HAL/AVR/Servo.cpp

@@ -63,30 +63,28 @@
 
 static volatile int8_t Channel[_Nbr_16timers];              // counter for the servo being pulsed for each timer (or -1 if refresh interval)
 
-
 /************ static functions common to all instances ***********************/
 
-static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t* TCNTn, volatile uint16_t* OCRnA) {
-  if (Channel[timer] < 0)
-    *TCNTn = 0; // channel set to -1 indicated that refresh interval completed so reset the timer
-  else {
-    if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && SERVO(timer, Channel[timer]).Pin.isActive)
-      extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, LOW); // pulse this channel low if activated
-  }
+static inline void handle_interrupts(const timer16_Sequence_t timer, volatile uint16_t* TCNTn, volatile uint16_t* OCRnA) {
+  int8_t cho = Channel[timer];                                        // Handle the prior Channel[timer] first
+  if (cho < 0)                                                        // Channel -1 indicates the refresh interval completed...
+    *TCNTn = 0;                                                       // ...so reset the timer
+  else if (SERVO_INDEX(timer, cho) < ServoCount)                      // prior channel handled?
+    extDigitalWrite(SERVO(timer, cho).Pin.nbr, LOW);                  // pulse the prior channel LOW
 
-  Channel[timer]++;    // increment to the next channel
-  if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && Channel[timer] < SERVOS_PER_TIMER) {
-    *OCRnA = *TCNTn + SERVO(timer, Channel[timer]).ticks;
-    if (SERVO(timer, Channel[timer]).Pin.isActive)    // check if activated
-      extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, HIGH); // it's an active channel so pulse it high
+  Channel[timer] = ++cho;                                             // Handle the next channel (or 0)
+  if (cho < SERVOS_PER_TIMER && SERVO_INDEX(timer, cho) < ServoCount) {
+    *OCRnA = *TCNTn + SERVO(timer, cho).ticks;                        // set compare to current ticks plus duration
+    if (SERVO(timer, cho).Pin.isActive)                               // activated?
+      extDigitalWrite(SERVO(timer, cho).Pin.nbr, HIGH);               // yes: pulse HIGH
   }
   else {
     // finished all channels so wait for the refresh period to expire before starting over
-    if (((unsigned)*TCNTn) + 4 < usToTicks(REFRESH_INTERVAL))    // allow a few ticks to ensure the next OCR1A not missed
-      *OCRnA = (unsigned int)usToTicks(REFRESH_INTERVAL);
-    else
-      *OCRnA = *TCNTn + 4;  // at least REFRESH_INTERVAL has elapsed
-    Channel[timer] = -1; // this will get incremented at the end of the refresh period to start again at the first channel
+    const unsigned int cval = ((unsigned)*TCNTn) + 32 / (SERVO_TIMER_PRESCALER), // allow 32 cycles to ensure the next OCR1A not missed
+                       ival = (unsigned int)usToTicks(REFRESH_INTERVAL); // at least REFRESH_INTERVAL has elapsed
+    *OCRnA = max(cval, ival);
+
+    Channel[timer] = -1;                                              // reset the timer counter to 0 on the next call
   }
 }
 
@@ -123,91 +121,102 @@ static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t
 
 /****************** end of static functions ******************************/
 
-void initISR(timer16_Sequence_t timer) {
-  #ifdef _useTimer1
-    if (timer == _timer1) {
-      TCCR1A = 0;             // normal counting mode
-      TCCR1B = _BV(CS11);     // set prescaler of 8
-      TCNT1 = 0;              // clear the timer count
-      #if defined(__AVR_ATmega8__) || defined(__AVR_ATmega128__)
-        SBI(TIFR, OCF1A);      // clear any pending interrupts;
-        SBI(TIMSK, OCIE1A);    // enable the output compare interrupt
-      #else
-        // here if not ATmega8 or ATmega128
-        SBI(TIFR1, OCF1A);     // clear any pending interrupts;
-        SBI(TIMSK1, OCIE1A);   // enable the output compare interrupt
-      #endif
-      #ifdef WIRING
-        timerAttach(TIMER1OUTCOMPAREA_INT, Timer1Service);
-      #endif
-    }
-  #endif
+void initISR(const timer16_Sequence_t timer_index) {
+  switch (timer_index) {
+    default: break;
 
-  #ifdef _useTimer3
-    if (timer == _timer3) {
-      TCCR3A = 0;             // normal counting mode
-      TCCR3B = _BV(CS31);     // set prescaler of 8
-      TCNT3 = 0;              // clear the timer count
-      #ifdef __AVR_ATmega128__
-        SBI(TIFR, OCF3A);     // clear any pending interrupts;
-        SBI(ETIMSK, OCIE3A);  // enable the output compare interrupt
-      #else
-        SBI(TIFR3, OCF3A);   // clear any pending interrupts;
-        SBI(TIMSK3, OCIE3A); // enable the output compare interrupt
-      #endif
-      #ifdef WIRING
-        timerAttach(TIMER3OUTCOMPAREA_INT, Timer3Service);  // for Wiring platform only
-      #endif
-    }
-  #endif
+    #ifdef _useTimer1
+      case _timer1:
+        TCCR1A = 0;             // normal counting mode
+        TCCR1B = _BV(CS11);     // set prescaler of 8
+        TCNT1 = 0;              // clear the timer count
+        #if defined(__AVR_ATmega8__) || defined(__AVR_ATmega128__)
+          SBI(TIFR, OCF1A);      // clear any pending interrupts;
+          SBI(TIMSK, OCIE1A);    // enable the output compare interrupt
+        #else
+          // here if not ATmega8 or ATmega128
+          SBI(TIFR1, OCF1A);     // clear any pending interrupts;
+          SBI(TIMSK1, OCIE1A);   // enable the output compare interrupt
+        #endif
+        #ifdef WIRING
+          timerAttach(TIMER1OUTCOMPAREA_INT, Timer1Service);
+        #endif
+        break;
+    #endif
 
-  #ifdef _useTimer4
-    if (timer == _timer4) {
-      TCCR4A = 0;             // normal counting mode
-      TCCR4B = _BV(CS41);     // set prescaler of 8
-      TCNT4 = 0;              // clear the timer count
-      TIFR4 = _BV(OCF4A);     // clear any pending interrupts;
-      TIMSK4 = _BV(OCIE4A);   // enable the output compare interrupt
-    }
-  #endif
+    #ifdef _useTimer3
+      case _timer3:
+        TCCR3A = 0;             // normal counting mode
+        TCCR3B = _BV(CS31);     // set prescaler of 8
+        TCNT3 = 0;              // clear the timer count
+        #ifdef __AVR_ATmega128__
+          SBI(TIFR, OCF3A);     // clear any pending interrupts;
+          SBI(ETIMSK, OCIE3A);  // enable the output compare interrupt
+        #else
+          SBI(TIFR3, OCF3A);   // clear any pending interrupts;
+          SBI(TIMSK3, OCIE3A); // enable the output compare interrupt
+        #endif
+        #ifdef WIRING
+          timerAttach(TIMER3OUTCOMPAREA_INT, Timer3Service);  // for Wiring platform only
+        #endif
+        break;
+    #endif
 
-  #ifdef _useTimer5
-    if (timer == _timer5) {
-      TCCR5A = 0;             // normal counting mode
-      TCCR5B = _BV(CS51);     // set prescaler of 8
-      TCNT5 = 0;              // clear the timer count
-      TIFR5 = _BV(OCF5A);     // clear any pending interrupts;
-      TIMSK5 = _BV(OCIE5A);   // enable the output compare interrupt
-    }
-  #endif
+    #ifdef _useTimer4
+      case _timer4:
+        TCCR4A = 0;             // normal counting mode
+        TCCR4B = _BV(CS41);     // set prescaler of 8
+        TCNT4 = 0;              // clear the timer count
+        TIFR4 = _BV(OCF4A);     // clear any pending interrupts;
+        TIMSK4 = _BV(OCIE4A);   // enable the output compare interrupt
+        break;
+    #endif
+
+    #ifdef _useTimer5
+      case _timer5:
+        TCCR5A = 0;             // normal counting mode
+        TCCR5B = _BV(CS51);     // set prescaler of 8
+        TCNT5 = 0;              // clear the timer count
+        TIFR5 = _BV(OCF5A);     // clear any pending interrupts;
+        TIMSK5 = _BV(OCIE5A);   // enable the output compare interrupt
+        break;
+    #endif
+  }
 }
 
-void finISR(timer16_Sequence_t timer) {
+void finISR(const timer16_Sequence_t timer_index) {
   // Disable use of the given timer
   #ifdef WIRING
-    if (timer == _timer1) {
-      CBI(
-        #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
-          TIMSK1
-        #else
-          TIMSK
-        #endif
-          , OCIE1A);    // disable timer 1 output compare interrupt
-      timerDetach(TIMER1OUTCOMPAREA_INT);
-    }
-    else if (timer == _timer3) {
-      CBI(
-        #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
-          TIMSK3
-        #else
-          ETIMSK
-        #endif
-          , OCIE3A);    // disable the timer3 output compare A interrupt
-      timerDetach(TIMER3OUTCOMPAREA_INT);
+    switch (timer_index) {
+      default: break;
+
+      case _timer1:
+        CBI(
+          #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
+            TIMSK1
+          #else
+            TIMSK
+          #endif
+          , OCIE1A    // disable timer 1 output compare interrupt
+        );
+        timerDetach(TIMER1OUTCOMPAREA_INT);
+        break;
+
+      case _timer3:
+        CBI(
+          #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
+            TIMSK3
+          #else
+            ETIMSK
+          #endif
+          , OCIE3A    // disable the timer3 output compare A interrupt
+        );
+        timerDetach(TIMER3OUTCOMPAREA_INT);
+        break;
     }
   #else // !WIRING
     // For arduino - in future: call here to a currently undefined function to reset the timer
-    UNUSED(timer);
+    UNUSED(timer_index);
   #endif
 }
 

Marlin/src/HAL/AVR/eeprom.cpp

@@ -23,7 +23,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
+#if ANY(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
 
 /**
  * PersistentStore for Arduino-style EEPROM interface
@@ -35,18 +35,18 @@
 #ifndef MARLIN_EEPROM_SIZE
   #define MARLIN_EEPROM_SIZE size_t(E2END + 1)
 #endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
+size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE - eeprom_exclude_size; }
 bool PersistentStore::access_start()  { return true; }
 bool PersistentStore::access_finish() { return true; }
 
 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  uint16_t written = 0;
   while (size--) {
-    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t * const p = (uint8_t * const)REAL_EEPROM_ADDR(pos);
     uint8_t v = *value;
-    // EEPROM has only ~100,000 write cycles,
-    // so only write bytes that have changed!
-    if (v != eeprom_read_byte(p)) {
+    if (v != eeprom_read_byte(p)) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
       eeprom_write_byte(p, v);
+      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
       if (eeprom_read_byte(p) != v) {
         SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
         return true;
@@ -59,9 +59,9 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
   return false;
 }
 
-bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
   do {
-    uint8_t c = eeprom_read_byte((uint8_t*)pos);
+    const uint8_t c = eeprom_read_byte((uint8_t*)REAL_EEPROM_ADDR(pos));
     if (writing) *value = c;
     crc16(crc, &c, 1);
     pos++;

Marlin/src/HAL/AVR/endstop_interrupts.h

@@ -91,7 +91,6 @@ void endstop_ISR() { endstops.update(); }
 
 #endif
 
-
 // Install Pin change interrupt for a pin. Can be called multiple times.
 void pciSetup(const int8_t pin) {
   if (digitalPinHasPCICR(pin)) {
@@ -120,139 +119,229 @@ void pciSetup(const int8_t pin) {
 
 void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
-  #if HAS_X_MAX
+  #if USE_X_MAX
     #if (digitalPinToInterrupt(X_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(X_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(X_MAX_PIN), "X_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(X_MAX_PIN), "X_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(X_MAX_PIN);
     #endif
   #endif
-  #if HAS_X_MIN
+  #if USE_X_MIN
     #if (digitalPinToInterrupt(X_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(X_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(X_MIN_PIN), "X_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(X_MIN_PIN), "X_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(X_MIN_PIN);
     #endif
   #endif
-  #if HAS_Y_MAX
+  #if USE_Y_MAX
     #if (digitalPinToInterrupt(Y_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Y_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Y_MAX_PIN), "Y_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Y_MAX_PIN), "Y_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Y_MAX_PIN);
     #endif
   #endif
-  #if HAS_Y_MIN
+  #if USE_Y_MIN
     #if (digitalPinToInterrupt(Y_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Y_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Y_MIN_PIN), "Y_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Y_MIN_PIN), "Y_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Y_MIN_PIN);
     #endif
   #endif
-  #if HAS_Z_MAX
+  #if USE_Z_MAX
     #if (digitalPinToInterrupt(Z_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z_MAX_PIN), "Z_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z_MAX_PIN), "Z_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z_MAX_PIN);
     #endif
   #endif
-  #if HAS_Z_MIN
+  #if USE_Z_MIN
     #if (digitalPinToInterrupt(Z_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z_MIN_PIN), "Z_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z_MIN_PIN), "Z_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z_MIN_PIN);
     #endif
   #endif
-  #if HAS_X2_MAX
+  #if USE_I_MAX
+    #if (digitalPinToInterrupt(I_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(I_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(I_MAX_PIN), "I_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(I_MAX_PIN);
+    #endif
+  #elif USE_I_MIN
+    #if (digitalPinToInterrupt(I_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(I_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(I_MIN_PIN), "I_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(I_MIN_PIN);
+    #endif
+  #endif
+  #if USE_J_MAX
+    #if (digitalPinToInterrupt(J_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(J_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(J_MAX_PIN), "J_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(J_MAX_PIN);
+    #endif
+  #elif USE_J_MIN
+    #if (digitalPinToInterrupt(J_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(J_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(J_MIN_PIN), "J_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(J_MIN_PIN);
+    #endif
+  #endif
+  #if USE_K_MAX
+    #if (digitalPinToInterrupt(K_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(K_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(K_MAX_PIN), "K_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(K_MAX_PIN);
+    #endif
+  #elif USE_K_MIN
+    #if (digitalPinToInterrupt(K_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(K_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(K_MIN_PIN), "K_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(K_MIN_PIN);
+    #endif
+  #endif
+  #if USE_U_MAX
+    #if (digitalPinToInterrupt(U_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(U_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(U_MAX_PIN), "U_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(U_MAX_PIN);
+    #endif
+  #elif USE_U_MIN
+    #if (digitalPinToInterrupt(U_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(U_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(U_MIN_PIN), "U_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(U_MIN_PIN);
+    #endif
+  #endif
+  #if USE_V_MAX
+    #if (digitalPinToInterrupt(V_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(V_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(V_MAX_PIN), "V_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(V_MAX_PIN);
+    #endif
+  #elif USE_V_MIN
+    #if (digitalPinToInterrupt(V_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(V_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(V_MIN_PIN), "V_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(V_MIN_PIN);
+    #endif
+  #endif
+  #if USE_W_MAX
+    #if (digitalPinToInterrupt(W_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(W_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(W_MAX_PIN), "W_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(W_MAX_PIN);
+    #endif
+  #elif USE_W_MIN
+    #if (digitalPinToInterrupt(W_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(W_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(W_MIN_PIN), "W_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      pciSetup(W_MIN_PIN);
+    #endif
+  #endif
+  #if USE_X2_MAX
     #if (digitalPinToInterrupt(X2_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(X2_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(X2_MAX_PIN), "X2_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(X2_MAX_PIN), "X2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(X2_MAX_PIN);
     #endif
   #endif
-  #if HAS_X2_MIN
+  #if USE_X2_MIN
     #if (digitalPinToInterrupt(X2_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(X2_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(X2_MIN_PIN), "X2_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(X2_MIN_PIN), "X2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(X2_MIN_PIN);
     #endif
   #endif
-  #if HAS_Y2_MAX
+  #if USE_Y2_MAX
     #if (digitalPinToInterrupt(Y2_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Y2_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Y2_MAX_PIN), "Y2_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Y2_MAX_PIN), "Y2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Y2_MAX_PIN);
     #endif
   #endif
-  #if HAS_Y2_MIN
+  #if USE_Y2_MIN
     #if (digitalPinToInterrupt(Y2_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Y2_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Y2_MIN_PIN), "Y2_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Y2_MIN_PIN), "Y2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Y2_MIN_PIN);
     #endif
   #endif
-  #if HAS_Z2_MAX
+  #if USE_Z2_MAX
     #if (digitalPinToInterrupt(Z2_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z2_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z2_MAX_PIN), "Z2_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z2_MAX_PIN), "Z2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z2_MAX_PIN);
     #endif
   #endif
-  #if HAS_Z2_MIN
+  #if USE_Z2_MIN
     #if (digitalPinToInterrupt(Z2_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z2_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z2_MIN_PIN), "Z2_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z2_MIN_PIN), "Z2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z2_MIN_PIN);
     #endif
   #endif
-  #if HAS_Z3_MAX
+  #if USE_Z3_MAX
     #if (digitalPinToInterrupt(Z3_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z3_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z3_MAX_PIN), "Z3_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z3_MAX_PIN), "Z3_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z3_MAX_PIN);
     #endif
   #endif
-  #if HAS_Z3_MIN
+  #if USE_Z3_MIN
     #if (digitalPinToInterrupt(Z3_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z3_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z3_MIN_PIN), "Z3_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z3_MIN_PIN), "Z3_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z3_MIN_PIN);
     #endif
   #endif
-  #if HAS_Z4_MAX
+  #if USE_Z4_MAX
     #if (digitalPinToInterrupt(Z4_MAX_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z4_MAX_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z4_MAX_PIN), "Z4_MAX_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z4_MAX_PIN), "Z4_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z4_MAX_PIN);
     #endif
   #endif
-  #if HAS_Z4_MIN
+  #if USE_Z4_MIN
     #if (digitalPinToInterrupt(Z4_MIN_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z4_MIN_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z4_MIN_PIN), "Z4_MIN_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z4_MIN_PIN), "Z4_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z4_MIN_PIN);
     #endif
   #endif
-  #if HAS_Z_MIN_PROBE_PIN
+  #if USE_Z_MIN_PROBE
     #if (digitalPinToInterrupt(Z_MIN_PROBE_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z_MIN_PROBE_PIN);
     #else
-      static_assert(digitalPinHasPCICR(Z_MIN_PROBE_PIN), "Z_MIN_PROBE_PIN is not interrupt-capable");
+      static_assert(digitalPinHasPCICR(Z_MIN_PROBE_PIN), "Z_MIN_PROBE_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
       pciSetup(Z_MIN_PROBE_PIN);
     #endif
   #endif

Marlin/src/HAL/AVR/fast_pwm.cpp

@@ -21,11 +21,11 @@
  */
 #ifdef __AVR__
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../inc/MarlinConfig.h"
 
-#if NEEDS_HARDWARE_PWM // Specific meta-flag for features that mandate PWM
-
-#include "HAL.h"
+//#define DEBUG_AVR_FAST_PWM
+#define DEBUG_OUT ENABLED(DEBUG_AVR_FAST_PWM)
+#include "../../core/debug_out.h"
 
 struct Timer {
   volatile uint8_t* TCCRnQ[3];  // max 3 TCCR registers per timer
@@ -33,250 +33,207 @@ struct Timer {
   volatile uint16_t* ICRn;      // max 1 ICR register per timer
   uint8_t n;                    // the timer number [0->5]
   uint8_t q;                    // the timer output [0->2] (A->C)
+  bool isPWM;                   // True if pin is a "hardware timer"
+  bool isProtected;             // True if timer is protected
 };
 
+// Macros for the Timer structure
+#define _SET_WGMnQ(T, V) do{ \
+    *(T.TCCRnQ)[0] = (*(T.TCCRnQ)[0] & ~(0x3 << 0)) | (( int(V)       & 0x3) << 0); \
+    *(T.TCCRnQ)[1] = (*(T.TCCRnQ)[1] & ~(0x3 << 3)) | (((int(V) >> 2) & 0x3) << 3); \
+  }while(0)
+
+// Set TCCR CS bits
+#define _SET_CSn(T, V) (*(T.TCCRnQ)[1] = (*(T.TCCRnQ[1]) & ~(0x7 << 0)) | ((int(V) & 0x7) << 0))
+
+// Set TCCR COM bits
+#define _SET_COMnQ(T, Q, V) (*(T.TCCRnQ)[0] = (*(T.TCCRnQ)[0] & ~(0x3 << (6-2*(Q)))) | (int(V) << (6-2*(Q))))
+
+// Set OCRnQ register
+#define _SET_OCRnQ(T, Q, V) (*(T.OCRnQ)[Q] = int(V) & 0xFFFF)
+
+// Set ICRn register (one per timer)
+#define _SET_ICRn(T, V) (*(T.ICRn) = int(V) & 0xFFFF)
+
 /**
- * get_pwm_timer
- *  Get the timer information and register of the provided pin.
- *  Return a Timer struct containing this information.
- *  Used by set_pwm_frequency, set_pwm_duty
+ * Return a Timer struct describing a pin's timer.
  */
-Timer get_pwm_timer(const pin_t pin) {
+const Timer get_pwm_timer(const pin_t pin) {
+
   uint8_t q = 0;
+
   switch (digitalPinToTimer(pin)) {
-    // Protect reserved timers (TIMER0 & TIMER1)
     #ifdef TCCR0A
-      #if !AVR_AT90USB1286_FAMILY
-        case TIMER0A:
-      #endif
-      case TIMER0B:
+      IF_DISABLED(AVR_AT90USB1286_FAMILY, case TIMER0A:)
     #endif
     #ifdef TCCR1A
       case TIMER1A: case TIMER1B:
     #endif
-                                        break;
-    #if defined(TCCR2) || defined(TCCR2A)
-      #ifdef TCCR2
-        case TIMER2: {
-          Timer timer = {
-            /*TCCRnQ*/  { &TCCR2, nullptr, nullptr },
-            /*OCRnQ*/   { (uint16_t*)&OCR2, nullptr, nullptr },
-            /*ICRn*/      nullptr,
-            /*n, q*/      2, 0
-          };
-        }
-      #elif defined(TCCR2A)
-        #if ENABLED(USE_OCR2A_AS_TOP)
-          case TIMER2A:   break; // protect TIMER2A
-          case TIMER2B: {
-            Timer timer = {
-              /*TCCRnQ*/  { &TCCR2A,  &TCCR2B,  nullptr },
-              /*OCRnQ*/   { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr },
-              /*ICRn*/      nullptr,
-              /*n, q*/      2, 1
-            };
-            return timer;
-          }
-        #else
-          case TIMER2B:   ++q;
-          case TIMER2A: {
-            Timer timer = {
-              /*TCCRnQ*/  { &TCCR2A,  &TCCR2B,  nullptr },
-              /*OCRnQ*/   { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr },
-              /*ICRn*/      nullptr,
-                            2, q
-            };
-            return timer;
-          }
-        #endif
-      #endif
+
+    break;    // Protect reserved timers (TIMER0 & TIMER1)
+
+    #ifdef TCCR0A
+      case TIMER0B:   // Protected timer, but allow setting the duty cycle on OCR0B for pin D4 only
+        return Timer({ { &TCCR0A, nullptr, nullptr }, { (uint16_t*)&OCR0A, (uint16_t*)&OCR0B, nullptr }, nullptr, 0, 1, true, true });
     #endif
+
+    #if HAS_TCCR2
+      case TIMER2:
+        return Timer({ { &TCCR2, nullptr, nullptr }, { (uint16_t*)&OCR2, nullptr, nullptr }, nullptr, 2, 0, true, false });
+    #elif ENABLED(USE_OCR2A_AS_TOP)
+      case TIMER2A: break; // Protect TIMER2A since its OCR is used by TIMER2B
+      case TIMER2B:
+        return Timer({ { &TCCR2A, &TCCR2B, nullptr }, { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr }, nullptr, 2, 1, true, false });
+    #elif defined(TCCR2A)
+      case TIMER2B: ++q; case TIMER2A:
+        return Timer({ { &TCCR2A, &TCCR2B, nullptr }, { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr }, nullptr, 2, q, true, false });
+    #endif
+
     #ifdef OCR3C
-      case TIMER3C:   ++q;
-      case TIMER3B:   ++q;
-      case TIMER3A: {
-        Timer timer = {
-          /*TCCRnQ*/  { &TCCR3A,  &TCCR3B,  &TCCR3C },
-          /*OCRnQ*/   { &OCR3A,   &OCR3B,   &OCR3C },
-          /*ICRn*/      &ICR3,
-          /*n, q*/      3, q
-        };
-        return timer;
-      }
+      case TIMER3C: ++q; case TIMER3B: ++q; case TIMER3A:
+        return Timer({ { &TCCR3A, &TCCR3B, &TCCR3C }, { &OCR3A, &OCR3B, &OCR3C  }, &ICR3, 3, q, true, false });
     #elif defined(OCR3B)
-      case TIMER3B:   ++q;
-      case TIMER3A: {
-        Timer timer = {
-          /*TCCRnQ*/  { &TCCR3A,  &TCCR3B,  nullptr },
-          /*OCRnQ*/   { &OCR3A,   &OCR3B,  nullptr },
-          /*ICRn*/      &ICR3,
-          /*n, q*/      3, q
-        };
-        return timer;
-      }
+      case TIMER3B: ++q; case TIMER3A:
+        return Timer({ { &TCCR3A, &TCCR3B, nullptr }, { &OCR3A, &OCR3B, nullptr }, &ICR3, 3, q, true, false });
     #endif
+
     #ifdef TCCR4A
-      case TIMER4C:   ++q;
-      case TIMER4B:   ++q;
-      case TIMER4A: {
-        Timer timer = {
-          /*TCCRnQ*/  { &TCCR4A,  &TCCR4B,  &TCCR4C },
-          /*OCRnQ*/   { &OCR4A,   &OCR4B,   &OCR4C },
-          /*ICRn*/      &ICR4,
-          /*n, q*/      4, q
-        };
-        return timer;
-      }
+      case TIMER4C: ++q; case TIMER4B: ++q; case TIMER4A:
+        return Timer({ { &TCCR4A, &TCCR4B, &TCCR4C }, { &OCR4A, &OCR4B, &OCR4C }, &ICR4, 4, q, true, false });
     #endif
+
     #ifdef TCCR5A
-      case TIMER5C:   ++q;
-      case TIMER5B:   ++q;
-      case TIMER5A: {
-        Timer timer = {
-          /*TCCRnQ*/  { &TCCR5A,  &TCCR5B,  &TCCR5C },
-          /*OCRnQ*/   { &OCR5A,   &OCR5B,   &OCR5C },
-          /*ICRn*/      &ICR5,
-          /*n, q*/      5, q
-        };
-        return timer;
-      }
+      case TIMER5C: ++q; case TIMER5B: ++q; case TIMER5A:
+        return Timer({ { &TCCR5A, &TCCR5B, &TCCR5C }, { &OCR5A, &OCR5B, &OCR5C }, &ICR5, 5, q, true, false });
     #endif
   }
-  Timer timer = {
-      /*TCCRnQ*/  { nullptr, nullptr, nullptr },
-      /*OCRnQ*/   { nullptr, nullptr, nullptr },
-      /*ICRn*/      nullptr,
-                    0, 0
-  };
-  return timer;
+
+  return Timer();
 }
 
-void set_pwm_frequency(const pin_t pin, int f_desired) {
-  Timer timer = get_pwm_timer(pin);
-  if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
-  uint16_t size;
-  if (timer.n == 2) size = 255; else size = 65535;
+void MarlinHAL::set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {
+  DEBUG_ECHOLNPGM("set_pwm_frequency(pin=", pin, ", freq=", f_desired, ")");
+  const Timer timer = get_pwm_timer(pin);
+  if (timer.isProtected || !timer.isPWM) return; // Don't proceed if protected timer or not recognized
 
-  uint16_t res = 255;   // resolution (TOP value)
-  uint8_t j = 0;        // prescaler index
-  uint8_t wgm = 1;      // waveform generation mode
+  const bool is_timer2 = timer.n == 2;
+  const uint16_t maxtop = is_timer2 ? 0xFF : 0xFFFF;
+
+  DEBUG_ECHOLNPGM("maxtop=", maxtop);
+
+  uint16_t res = 0xFF;        // resolution (TOP value)
+  uint8_t j = CS_NONE;        // prescaler index
+  uint8_t wgm = WGM_PWM_PC_8; // waveform generation mode
 
   // Calculating the prescaler and resolution to use to achieve closest frequency
   if (f_desired != 0) {
-    int f = (F_CPU) / (2 * 1024 * size) + 1; // Initialize frequency as lowest (non-zero) achievable
-    uint16_t prescaler[] = { 0, 1, 8, /*TIMER2 ONLY*/32, 64, /*TIMER2 ONLY*/128, 256, 1024 };
+    constexpr uint16_t prescaler[] = { 1, 8, (32), 64, (128), 256, 1024 };  // (*) are Timer 2 only
+    uint16_t f = (F_CPU) / (uint32_t(maxtop) << 11) + 1;      // Start with the lowest non-zero frequency achievable (for 16MHz, 1 or 31)
 
-    // loop over prescaler values
-    LOOP_S_L_N(i, 1, 8) {
-      uint16_t res_temp_fast = 255, res_temp_phase_correct = 255;
-      if (timer.n == 2) {
-        // No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
-        #if ENABLED(USE_OCR2A_AS_TOP)
-          const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
-          res_temp_fast = rtf - 1;
-          res_temp_phase_correct = rtf / 2;
+    DEBUG_ECHOLNPGM("f=", f);
+    DEBUG_ECHOLNPGM("(prescaler loop)");
+    for (uint8_t i = 0; i < COUNT(prescaler); ++i) {          // Loop through all prescaler values
+      const uint32_t p = prescaler[i];                        // Extend to 32 bits for calculations
+      DEBUG_ECHOLNPGM("prescaler[", i, "]=", p);
+      uint16_t res_fast_temp, res_pc_temp;
+      if (is_timer2) {
+        #if ENABLED(USE_OCR2A_AS_TOP)                         // No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
+          const uint16_t rft = (F_CPU) / (p * f_desired);
+          res_fast_temp = rft - 1;
+          res_pc_temp = rft / 2;
+          DEBUG_ECHOLNPGM("(Timer2) res_fast_temp=", res_fast_temp, " res_pc_temp=", res_pc_temp);
+        #else
+          res_fast_temp = res_pc_temp = maxtop;
+          DEBUG_ECHOLNPGM("(Timer2) res_fast_temp=", maxtop, " res_pc_temp=", maxtop);
         #endif
       }
       else {
-        // Skip TIMER2 specific prescalers when not TIMER2
-        if (i == 3 || i == 5) continue;
-        const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
-        res_temp_fast = rtf - 1;
-        res_temp_phase_correct = rtf / 2;
+        if (p == 32 || p == 128) continue;                    // Skip TIMER2 specific prescalers when not TIMER2
+        const uint16_t rft = (F_CPU) / (p * f_desired);
+        DEBUG_ECHOLNPGM("(Not Timer 2) F_CPU=" STRINGIFY(F_CPU), " prescaler=", p, " f_desired=", f_desired);
+        res_fast_temp = rft - 1;
+        res_pc_temp = rft / 2;
       }
 
-      LIMIT(res_temp_fast, 1u, size);
-      LIMIT(res_temp_phase_correct, 1u, size);
+      LIMIT(res_fast_temp, 1U, maxtop);
+      LIMIT(res_pc_temp, 1U, maxtop);
+
       // Calculate frequencies of test prescaler and resolution values
-      const int f_temp_fast = (F_CPU) / (prescaler[i] * (1 + res_temp_fast)),
-                f_temp_phase_correct = (F_CPU) / (2 * prescaler[i] * res_temp_phase_correct),
-                f_diff = ABS(f - f_desired),
-                f_fast_diff = ABS(f_temp_fast - f_desired),
-                f_phase_diff = ABS(f_temp_phase_correct - f_desired);
+      const uint16_t f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
+                     f_pc_temp   = (F_CPU) / ((p * res_pc_temp) << 1),
+                     f_diff      = _MAX(f, f_desired) - _MIN(f, f_desired),
+                     f_fast_diff = _MAX(f_fast_temp, f_desired) - _MIN(f_fast_temp, f_desired),
+                     f_pc_diff   = _MAX(f_pc_temp, f_desired) - _MIN(f_pc_temp, f_desired);
 
-      // If FAST values are closest to desired f
-      if (f_fast_diff < f_diff && f_fast_diff <= f_phase_diff) {
-        // Remember this combination
-        f = f_temp_fast;
-        res = res_temp_fast;
-        j = i;
+      DEBUG_ECHOLNPGM("f_fast_temp=", f_fast_temp, " f_pc_temp=", f_pc_temp, " f_diff=", f_diff, " f_fast_diff=", f_fast_diff, " f_pc_diff=", f_pc_diff);
+
+      if (f_fast_diff < f_diff && f_fast_diff <= f_pc_diff) { // FAST values are closest to desired f
         // Set the Wave Generation Mode to FAST PWM
-        if (timer.n == 2) {
-          wgm = (
-            #if ENABLED(USE_OCR2A_AS_TOP)
-              WGM2_FAST_PWM_OCR2A
-            #else
-              WGM2_FAST_PWM
-            #endif
-          );
-        }
-        else wgm = WGM_FAST_PWM_ICRn;
+        wgm = is_timer2 ? uint8_t(TERN(USE_OCR2A_AS_TOP, WGM2_FAST_PWM_OCR2A, WGM2_FAST_PWM)) : uint8_t(WGM_FAST_PWM_ICRn);
+        // Remember this combination
+        f = f_fast_temp; res = res_fast_temp; j = i + 1;
+        DEBUG_ECHOLNPGM("(FAST) updated f=", f);
       }
-      // If PHASE CORRECT values are closes to desired f
-      else if (f_phase_diff < f_diff) {
-        f = f_temp_phase_correct;
-        res = res_temp_phase_correct;
-        j = i;
+      else if (f_pc_diff < f_diff) {                          // PHASE CORRECT values are closes to desired f
         // Set the Wave Generation Mode to PWM PHASE CORRECT
-        if (timer.n == 2) {
-          wgm = (
-            #if ENABLED(USE_OCR2A_AS_TOP)
-              WGM2_PWM_PC_OCR2A
-            #else
-              WGM2_PWM_PC
-            #endif
-          );
-        }
-        else wgm = WGM_PWM_PC_ICRn;
+        wgm = is_timer2 ? uint8_t(TERN(USE_OCR2A_AS_TOP, WGM2_PWM_PC_OCR2A, WGM2_PWM_PC)) : uint8_t(WGM_PWM_PC_ICRn);
+        f = f_pc_temp; res = res_pc_temp; j = i + 1;
+        DEBUG_ECHOLNPGM("(PHASE) updated f=", f);
       }
-    }
+    } // prescaler loop
   }
-  _SET_WGMnQ(timer.TCCRnQ, wgm);
-  _SET_CSn(timer.TCCRnQ, j);
 
-  if (timer.n == 2) {
-    #if ENABLED(USE_OCR2A_AS_TOP)
-      _SET_OCRnQ(timer.OCRnQ, 0, res);  // Set OCR2A value (TOP) = res
-    #endif
+  _SET_WGMnQ(timer, wgm);
+  _SET_CSn(timer, j);
+
+  if (is_timer2) {
+    TERN_(USE_OCR2A_AS_TOP, _SET_OCRnQ(timer, 0, res)); // Set OCR2A value (TOP) = res
   }
   else
-    _SET_ICRn(timer.ICRn, res);         // Set ICRn value (TOP) = res
+    _SET_ICRn(timer, res);                              // Set ICRn value (TOP) = res
 }
 
-void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
+void MarlinHAL::set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
   // If v is 0 or v_size (max), digitalWrite to LOW or HIGH.
-  // Note that digitalWrite also disables pwm output for us (sets COM bit to 0)
+  // Note that digitalWrite also disables PWM output for us (sets COM bit to 0)
   if (v == 0)
     digitalWrite(pin, invert);
   else if (v == v_size)
     digitalWrite(pin, !invert);
   else {
-    Timer timer = get_pwm_timer(pin);
-    if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
-    // Set compare output mode to CLEAR -> SET or SET -> CLEAR (if inverted)
-    _SET_COMnQ(timer.TCCRnQ, (timer.q
-        #ifdef TCCR2
-          + (timer.q == 2) // COM20 is on bit 4 of TCCR2, thus requires q + 1 in the macro
-        #endif
-      ), COM_CLEAR_SET + invert
-    );
-
-    uint16_t top;
-    if (timer.n == 2) { // if TIMER2
-      top = (
-        #if ENABLED(USE_OCR2A_AS_TOP)
-          *timer.OCRnQ[0] // top = OCR2A
-        #else
-          255 // top = 0xFF (max)
-        #endif
-      );
+    const Timer timer = get_pwm_timer(pin);
+    if (timer.isPWM) {
+      if (timer.n == 0) {
+        _SET_COMnQ(timer, timer.q, COM_CLEAR_SET);  // Only allow a TIMER0B select...
+        _SET_OCRnQ(timer, timer.q, v);              // ...and OCR0B duty update. For output pin D4 no frequency changes are permitted.
+      }
+      else if (!timer.isProtected) {
+        const uint16_t top = timer.n == 2 ? TERN(USE_OCR2A_AS_TOP, *timer.OCRnQ[0], 255) : *timer.ICRn;
+        _SET_COMnQ(timer, SUM_TERN(HAS_TCCR2, timer.q, timer.q == 2), COM_CLEAR_SET + invert);   // COM20 is on bit 4 of TCCR2, so +1 for q==2
+        _SET_OCRnQ(timer, timer.q, uint16_t(uint32_t(v) * top / v_size)); // Scale 8/16-bit v to top value
+      }
     }
     else
-      top = *timer.ICRn; // top = ICRn
-
-    _SET_OCRnQ(timer.OCRnQ, timer.q, v * float(top) / float(v_size)); // Scale 8/16-bit v to top value
+      digitalWrite(pin, v < v_size / 2 ? LOW : HIGH);
   }
 }
 
-#endif // NEEDS_HARDWARE_PWM
+void MarlinHAL::init_pwm_timers() {
+  // Init some timer frequencies to a default 1KHz
+  const pin_t pwm_pin[] = {
+    #ifdef __AVR_ATmega2560__
+      10, 5, 6, 46
+    #elif defined(__AVR_ATmega1280__)
+      12, 31
+    #elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega1284__)
+      15, 6
+    #elif defined(__AVR_AT90USB1286__) || defined(__AVR_mega64) || defined(__AVR_mega128)
+      16, 24
+    #endif
+  };
+
+  for (uint8_t i = 0; i < COUNT(pwm_pin); ++i)
+    set_pwm_frequency(pwm_pin[i], 1000);
+}
+
 #endif // __AVR__

Marlin/src/HAL/AVR/fastio.cpp

@@ -241,11 +241,11 @@ uint8_t extDigitalRead(const int8_t pin) {
  *
  * DC values -1.0 to 1.0. Negative duty cycle inverts the pulse.
  */
-uint16_t set_pwm_frequency_hz(const float &hz, const float dca, const float dcb, const float dcc) {
+uint16_t set_pwm_frequency_hz(const_float_t hz, const float dca, const float dcb, const float dcc) {
   float count = 0;
   if (hz > 0 && (dca || dcb || dcc)) {
     count = float(F_CPU) / hz;            // 1x prescaler, TOP for 16MHz base freq.
-    uint16_t prescaler;                   // Range of 30.5Hz (65535) 64.5KHz (>31)
+    uint16_t prescaler;                   // Range of 30.5Hz (65535) 64.5kHz (>31)
 
          if (count >= 255. * 256.) { prescaler = 1024; SET_CS(5, PRESCALER_1024); }
     else if (count >= 255. * 64.)  { prescaler = 256;  SET_CS(5,  PRESCALER_256); }
@@ -257,7 +257,7 @@ uint16_t set_pwm_frequency_hz(const float &hz, const float dca, const float dcb,
     const float pwm_top = round(count);   // Get the rounded count
 
     ICR5 = (uint16_t)pwm_top - 1;         // Subtract 1 for TOP
-    OCR5A = pwm_top * ABS(dca);          // Update and scale DCs
+    OCR5A = pwm_top * ABS(dca);           // Update and scale DCs
     OCR5B = pwm_top * ABS(dcb);
     OCR5C = pwm_top * ABS(dcc);
     _SET_COM(5, A, dca ? (dca < 0 ? COM_SET_CLEAR : COM_CLEAR_SET) : COM_NORMAL); // Set compare modes
@@ -267,17 +267,17 @@ uint16_t set_pwm_frequency_hz(const float &hz, const float dca, const float dcb,
     SET_WGM(5, FAST_PWM_ICRn);            // Fast PWM with ICR5 as TOP
 
     //SERIAL_ECHOLNPGM("Timer 5 Settings:");
-    //SERIAL_ECHOLNPAIR("  Prescaler=", prescaler);
-    //SERIAL_ECHOLNPAIR("        TOP=", ICR5);
-    //SERIAL_ECHOLNPAIR("      OCR5A=", OCR5A);
-    //SERIAL_ECHOLNPAIR("      OCR5B=", OCR5B);
-    //SERIAL_ECHOLNPAIR("      OCR5C=", OCR5C);
+    //SERIAL_ECHOLNPGM("  Prescaler=", prescaler);
+    //SERIAL_ECHOLNPGM("        TOP=", ICR5);
+    //SERIAL_ECHOLNPGM("      OCR5A=", OCR5A);
+    //SERIAL_ECHOLNPGM("      OCR5B=", OCR5B);
+    //SERIAL_ECHOLNPGM("      OCR5C=", OCR5C);
   }
   else {
     // Restore the default for Timer 5
     SET_WGM(5, PWM_PC_8);                 // PWM 8-bit (Phase Correct)
     SET_COMS(5, NORMAL, NORMAL, NORMAL);  // Do nothing
-    SET_CS(5, PRESCALER_64);              // 16MHz / 64 = 250KHz
+    SET_CS(5, PRESCALER_64);              // 16MHz / 64 = 250kHz
     OCR5A = OCR5B = OCR5C = 0;
   }
   return round(count);

Marlin/src/HAL/AVR/fastio.h

@@ -118,7 +118,7 @@
  */
 
 // Waveform Generation Modes
-enum WaveGenMode : char {
+enum WaveGenMode : uint8_t {
   WGM_NORMAL,          //  0
   WGM_PWM_PC_8,        //  1
   WGM_PWM_PC_9,        //  2
@@ -138,19 +138,19 @@ enum WaveGenMode : char {
 };
 
 // Wavefore Generation Modes (Timer 2 only)
-enum WaveGenMode2 : char {
-  WGM2_NORMAL,          // 0
-  WGM2_PWM_PC,          // 1
-  WGM2_CTC_OCR2A,       // 2
-  WGM2_FAST_PWM,        // 3
-  WGM2_reserved_1,      // 4
-  WGM2_PWM_PC_OCR2A,    // 5
-  WGM2_reserved_2,      // 6
-  WGM2_FAST_PWM_OCR2A,  // 7
+enum WaveGenMode2 : uint8_t {
+  WGM2_NORMAL,         // 0
+  WGM2_PWM_PC,         // 1
+  WGM2_CTC_OCR2A,      // 2
+  WGM2_FAST_PWM,       // 3
+  WGM2_reserved_1,     // 4
+  WGM2_PWM_PC_OCR2A,   // 5
+  WGM2_reserved_2,     // 6
+  WGM2_FAST_PWM_OCR2A, // 7
 };
 
 // Compare Modes
-enum CompareMode : char {
+enum CompareMode : uint8_t {
   COM_NORMAL,          //  0
   COM_TOGGLE,          //  1  Non-PWM: OCnx ... Both PWM (WGM 9,11,14,15): OCnA only ... else NORMAL
   COM_CLEAR_SET,       //  2  Non-PWM: OCnx ... Fast PWM: OCnx/Bottom ... PF-FC: OCnx Up/Down
@@ -158,7 +158,7 @@ enum CompareMode : char {
 };
 
 // Clock Sources
-enum ClockSource : char {
+enum ClockSource : uint8_t {
   CS_NONE,             //  0
   CS_PRESCALER_1,      //  1
   CS_PRESCALER_8,      //  2
@@ -170,7 +170,7 @@ enum ClockSource : char {
 };
 
 // Clock Sources (Timer 2 only)
-enum ClockSource2 : char {
+enum ClockSource2 : uint8_t {
   CS2_NONE,            //  0
   CS2_PRESCALER_1,     //  1
   CS2_PRESCALER_8,     //  2
@@ -203,40 +203,33 @@ enum ClockSource2 : char {
     TCCR##T##B = (TCCR##T##B & ~(0x3 << WGM##T##2)) | (((int(V) >> 2) & 0x3) << WGM##T##2); \
   }while(0)
 #define SET_WGM(T,V) _SET_WGM(T,WGM_##V)
-// Runtime (see set_pwm_frequency):
-#define _SET_WGMnQ(TCCRnQ, V) do{ \
-    *(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << 0)) | (( int(V)       & 0x3) << 0); \
-    *(TCCRnQ)[1] = (*(TCCRnQ)[1] & ~(0x3 << 3)) | (((int(V) >> 2) & 0x3) << 3); \
-  }while(0)
 
 // Set Clock Select bits
 // Ex: SET_CS3(PRESCALER_64);
+#ifdef TCCR2
+  #define HAS_TCCR2 1
+#endif
 #define _SET_CS(T,V) (TCCR##T##B = (TCCR##T##B & ~(0x7 << CS##T##0)) | ((int(V) & 0x7) << CS##T##0))
 #define _SET_CS0(V) _SET_CS(0,V)
 #define _SET_CS1(V) _SET_CS(1,V)
-#ifdef TCCR2
-  #define _SET_CS2(V) (TCCR2 = (TCCR2 & ~(0x7 << CS20)) | (int(V) << CS20))
-#else
-  #define _SET_CS2(V) _SET_CS(2,V)
-#endif
 #define _SET_CS3(V) _SET_CS(3,V)
 #define _SET_CS4(V) _SET_CS(4,V)
 #define _SET_CS5(V) _SET_CS(5,V)
 #define SET_CS0(V) _SET_CS0(CS_##V)
 #define SET_CS1(V) _SET_CS1(CS_##V)
-#ifdef TCCR2
+
+#if HAS_TCCR2
+  #define _SET_CS2(V) (TCCR2 = (TCCR2 & ~(0x7 << CS20)) | (int(V) << CS20))
   #define SET_CS2(V) _SET_CS2(CS2_##V)
 #else
+  #define _SET_CS2(V) _SET_CS(2,V)
   #define SET_CS2(V) _SET_CS2(CS_##V)
 #endif
+
 #define SET_CS3(V) _SET_CS3(CS_##V)
 #define SET_CS4(V) _SET_CS4(CS_##V)
 #define SET_CS5(V) _SET_CS5(CS_##V)
 #define SET_CS(T,V) SET_CS##T(V)
-// Runtime (see set_pwm_frequency)
-#define _SET_CSn(TCCRnQ, V) do{ \
-    (*(TCCRnQ)[1] = (*(TCCRnQ[1]) & ~(0x7 << 0)) | ((int(V) & 0x7) << 0)); \
-  }while(0)
 
 // Set Compare Mode bits
 // Ex: SET_COMS(4,CLEAR_SET,CLEAR_SET,CLEAR_SET);
@@ -246,22 +239,6 @@ enum ClockSource2 : char {
 #define SET_COMB(T,V) SET_COM(T,B,V)
 #define SET_COMC(T,V) SET_COM(T,C,V)
 #define SET_COMS(T,V1,V2,V3) do{ SET_COMA(T,V1); SET_COMB(T,V2); SET_COMC(T,V3); }while(0)
-// Runtime (see set_pwm_duty)
-#define _SET_COMnQ(TCCRnQ, Q, V) do{ \
-    (*(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << (6-2*(Q)))) | (int(V) << (6-2*(Q)))); \
-  }while(0)
-
-// Set OCRnQ register
-// Runtime (see set_pwm_duty):
-#define _SET_OCRnQ(OCRnQ, Q, V) do{ \
-    (*(OCRnQ)[(Q)] = (0x0000) | (int(V) & 0xFFFF)); \
-  }while(0)
-
-// Set ICRn register (one per timer)
-// Runtime (see set_pwm_frequency)
-#define _SET_ICRn(ICRn, V) do{ \
-    (*(ICRn) = (0x0000) | (int(V) & 0xFFFF)); \
-  }while(0)
 
 // Set Noise Canceler bit
 // Ex: SET_ICNC(2,1)
@@ -278,84 +255,6 @@ enum ClockSource2 : char {
 #define SET_FOCB(T,V) SET_FOC(T,B,V)
 #define SET_FOCC(T,V) SET_FOC(T,C,V)
 
-#if 0
-
-/**
- * PWM availability macros
- */
-
-// Determine which harware PWMs are already in use
-#define _PWM_CHK_FAN_B(P) (P == E0_AUTO_FAN_PIN || P == E1_AUTO_FAN_PIN || P == E2_AUTO_FAN_PIN || P == E3_AUTO_FAN_PIN || P == E4_AUTO_FAN_PIN || P == E5_AUTO_FAN_PIN || P == E6_AUTO_FAN_PIN || P == E7_AUTO_FAN_PIN || P == CHAMBER_AUTO_FAN_PIN)
-#if PIN_EXISTS(CONTROLLER_FAN)
-  #define PWM_CHK_FAN_B(P) (_PWM_CHK_FAN_B(P) || P == CONTROLLER_FAN_PIN)
-#else
-  #define PWM_CHK_FAN_B(P) _PWM_CHK_FAN_B(P)
-#endif
-
-#if ANY_PIN(FAN, FAN1, FAN2, FAN3, FAN4, FAN5, FAN6, FAN7)
-  #if PIN_EXISTS(FAN7)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN || P == FAN6_PIN || P == FAN7_PIN)
-  #elif PIN_EXISTS(FAN6)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN || P == FAN6_PIN)
-  #elif PIN_EXISTS(FAN5)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN)
-  #elif PIN_EXISTS(FAN4)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN)
-  #elif PIN_EXISTS(FAN3)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN)
-  #elif PIN_EXISTS(FAN2)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN)
-  #elif PIN_EXISTS(FAN1)
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN)
-  #else
-    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN)
-  #endif
-#else
-  #define PWM_CHK_FAN_A(P) false
-#endif
-
-#if HAS_MOTOR_CURRENT_PWM
-  #if PIN_EXISTS(MOTOR_CURRENT_PWM_XY)
-    #define PWM_CHK_MOTOR_CURRENT(P) (P == MOTOR_CURRENT_PWM_E || P == MOTOR_CURRENT_PWM_Z || P == MOTOR_CURRENT_PWM_XY)
-  #elif PIN_EXISTS(MOTOR_CURRENT_PWM_Z)
-    #define PWM_CHK_MOTOR_CURRENT(P) (P == MOTOR_CURRENT_PWM_E || P == MOTOR_CURRENT_PWM_Z)
-  #else
-    #define PWM_CHK_MOTOR_CURRENT(P) (P == MOTOR_CURRENT_PWM_E)
-  #endif
-#else
-  #define PWM_CHK_MOTOR_CURRENT(P) false
-#endif
-
-#ifdef NUM_SERVOS
-  #if AVR_ATmega2560_FAMILY
-    #define PWM_CHK_SERVO(P) (P == 5 || (NUM_SERVOS > 12 && P == 6) || (NUM_SERVOS > 24 && P == 46))  // PWMS 3A, 4A & 5A
-  #elif AVR_ATmega2561_FAMILY
-    #define PWM_CHK_SERVO(P)   (P == 5)  // PWM3A
-  #elif AVR_ATmega1284_FAMILY
-    #define PWM_CHK_SERVO(P)   false
-  #elif AVR_AT90USB1286_FAMILY
-    #define PWM_CHK_SERVO(P)   (P == 16) // PWM3A
-  #elif AVR_ATmega328_FAMILY
-    #define PWM_CHK_SERVO(P)   false
-  #endif
-#else
-  #define PWM_CHK_SERVO(P) false
-#endif
-
-#if ENABLED(BARICUDA)
-  #if HAS_HEATER_1 && HAS_HEATER_2
-    #define PWM_CHK_HEATER(P) (P == HEATER_1_PIN || P == HEATER_2_PIN)
-  #elif HAS_HEATER_1
-    #define PWM_CHK_HEATER(P) (P == HEATER_1_PIN)
-  #endif
-#else
-    #define PWM_CHK_HEATER(P) false
-#endif
-
-#define PWM_CHK(P) (PWM_CHK_HEATER(P) || PWM_CHK_SERVO(P) || PWM_CHK_MOTOR_CURRENT(P) || PWM_CHK_FAN_A(P) || PWM_CHK_FAN_B(P))
-
-#endif // PWM_CHK is not used in Marlin
-
 // define which hardware PWMs are available for the current CPU
 // all timer 1 PWMS deleted from this list because they are never available
 #if AVR_ATmega2560_FAMILY

Marlin/src/HAL/AVR/fastio/fastio_1280.h

@@ -27,43 +27,44 @@
  *   Hardware Pin  : 02 03 06 07 01 05 15 16 17 18 23 24 25 26 64 63 13 12 46 45 44 43 78 77 76 75 74 73 72 71 60 59 58 57 56 55 54 53 50 70 52 51 42 41 40 39 38 37 36 35 22 21 20 19 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 | 04 08 09 10 11 14 27 28 29 30 31 32 33 34 47 48 49 61 62 65 66 67 68 69 79 80 81 98 99 100
  *   Port          : E0 E1 E4 E5 G5 E3 H3 H4 H5 H6 B4 B5 B6 B7 J1 J0 H1 H0 D3 D2 D1 D0 A0 A1 A2 A3 A4 A5 A6 A7 C7 C6 C5 C4 C3 C2 C1 C0 D7 G2 G1 G0 L7 L6 L5 L4 L3 L2 L1 L0 B3 B2 B1 B0 F0 F1 F2 F3 F4 F5 F6 F7 K0 K1 K2 K3 K4 K5 K6 K7 | E2 E6 E7 xx xx H2 H7 G3 G4 xx xx xx xx xx D4 D5 D6 xx xx J2 J3 J4 J5 J6 J7 xx xx xx xx xx
  *   Logical Pin   : 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | 78 79 80 xx xx 84 85 71 70 xx xx xx xx xx 81 82 83 xx xx 72 73 75 76 77 74 xx xx xx xx xx
+ *   Analog Input  :                                                                                                                                                                    0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
+ *
+ * Arduino Pin Layout video: https://youtu.be/rIqeVCX09FA
+ * AVR alternate pin function overview video: https://youtu.be/1yd8wuI5Plg
  */
 
 #include "../fastio.h"
 
-// change for your board
-#define DEBUG_LED   DIO21
-
 // UART
-#define RXD         DIO0
-#define TXD         DIO1
+#define RXD         0
+#define TXD         1
 
 // SPI
-#define SCK         DIO52
-#define MISO        DIO50
-#define MOSI        DIO51
-#define SS          DIO53
+#define MISO        50
+#define MOSI        51
+#define SCK         52
+#define SS          53
 
 // TWI (I2C)
-#define SCL         DIO21
-#define SDA         DIO20
+#define SCL         21
+#define SDA         20
 
 // Timers and PWM
-#define OC0A        DIO13
-#define OC0B        DIO4
-#define OC1A        DIO11
-#define OC1B        DIO12
-#define OC2A        DIO10
-#define OC2B        DIO9
-#define OC3A        DIO5
-#define OC3B        DIO2
-#define OC3C        DIO3
-#define OC4A        DIO6
-#define OC4B        DIO7
-#define OC4C        DIO8
-#define OC5A        DIO46
-#define OC5B        DIO45
-#define OC5C        DIO44
+#define OC0A        13
+#define OC0B        4
+#define OC1A        11
+#define OC1B        12
+#define OC2A        10
+#define OC2B        9
+#define OC3A        5
+#define OC3B        2
+#define OC3C        3
+#define OC4A        6
+#define OC4B        7
+#define OC4C        8
+#define OC5A        46
+#define OC5B        45
+#define OC5C        44
 
 // Digital I/O
 

Marlin/src/HAL/AVR/fastio/fastio_1281.h

@@ -26,36 +26,36 @@
  *
  *   Logical Pin: 38 39 40 41 42 43 44 45 16 10 11 12 06 07 08 09 30 31 32 33 34 35 36 37 17 18 19 20 21 22 23 24 00 01 13 05 02 03 14 15 46 47 48 49 50 51 52 53 25 26 27 28 29 04
  *   Port:        A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 E0 E1 E2 E3 E4 E5 E6 E7 F0 F1 F2 F3 F4 F5 F6 F7 G0 G1 G2 G3 G4 G5
+ *
+ * Arduino Pin Layout video: https://youtu.be/rIqeVCX09FA
+ * AVR alternate pin function overview video: https://youtu.be/1yd8wuI5Plg
  */
 
 #include "../fastio.h"
 
-// change for your board
-#define DEBUG_LED   DIO46
-
 // UART
-#define RXD         DIO0
-#define TXD         DIO1
+#define RXD         0
+#define TXD         1
 
 // SPI
-#define SCK         DIO10
-#define MISO        DIO12
-#define MOSI        DIO11
-#define SS          DIO16
+#define SCK         10
+#define MISO        12
+#define MOSI        11
+#define SS          16
 
 // TWI (I2C)
-#define SCL         DIO17
-#define SDA         DIO18
+#define SCL         17
+#define SDA         18
 
 // Timers and PWM
-#define OC0A        DIO9
-#define OC0B        DIO4
-#define OC1A        DIO7
-#define OC1B        DIO8
-#define OC2A        DIO6
-#define OC3A        DIO5
-#define OC3B        DIO2
-#define OC3C        DIO3
+#define OC0A        9
+#define OC0B        4
+#define OC1A        7
+#define OC1B        8
+#define OC2A        6
+#define OC3A        5
+#define OC3B        2
+#define OC3C        3
 
 // Digital I/O
 

Marlin/src/HAL/AVR/fastio/fastio_168.h

@@ -26,33 +26,34 @@
  *
  *   Logical Pin: 08 09 10 11 12 13 14 15 16 17 18 19 20 21 00 01 02 03 04 05 06 07
  *   Port:        B0 B1 B2 B3 B4 B5 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7
+ *
+ * Arduino Pin Layout video: https://youtu.be/rIqeVCX09FA
+ * AVR alternate pin function overview video: https://youtu.be/1yd8wuI5Plg
  */
 
 #include "../fastio.h"
 
-#define DEBUG_LED   AIO5
-
 // UART
-#define RXD         DIO0
-#define TXD         DIO1
+#define RXD         0
+#define TXD         1
 
 // SPI
-#define SCK         DIO13
-#define MISO        DIO12
-#define MOSI        DIO11
-#define SS          DIO10
+#define SS          10
+#define MOSI        11
+#define MISO        12
+#define SCK         13
 
 // TWI (I2C)
 #define SCL         AIO5
 #define SDA         AIO4
 
 // Timers and PWM
-#define OC0A        DIO6
-#define OC0B        DIO5
-#define OC1A        DIO9
-#define OC1B        DIO10
-#define OC2A        DIO11
-#define OC2B        DIO3
+#define OC0A        6
+#define OC0B        5
+#define OC1A        9
+#define OC1B        10
+#define OC2A        11
+#define OC2B        3
 
 // Digital I/O
 

Marlin/src/HAL/AVR/fastio/fastio_644.h

@@ -26,6 +26,9 @@
  *
  *   Logical Pin: 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
  *   Port:        B0 B1 B2 B3 B4 B5 B6 B7 D0 D1 D2 D3 D4 D5 D6 D7 C0 C1 C2 C3 C4 C5 C6 C7 A7 A6 A5 A4 A3 A2 A1 A0
+ *
+ * Arduino Pin Layout video: https://youtu.be/rIqeVCX09FA
+ * AVR alternate pin function overview video: https://youtu.be/1yd8wuI5Plg
  */
 
 /**                        ATMega644
@@ -56,34 +59,32 @@
 
 #include "../fastio.h"
 
-#define DEBUG_LED   DIO0
-
 // UART
-#define RXD         DIO8
-#define TXD         DIO9
-#define RXD0        DIO8
-#define TXD0        DIO9
+#define RXD         8
+#define TXD         9
+#define RXD0        8
+#define TXD0        9
 
-#define RXD1        DIO10
-#define TXD1        DIO11
+#define RXD1        10
+#define TXD1        11
 
 // SPI
-#define SCK         DIO7
-#define MISO        DIO6
-#define MOSI        DIO5
-#define SS          DIO4
+#define SS          4
+#define MOSI        5
+#define MISO        6
+#define SCK         7
 
 // TWI (I2C)
-#define SCL         DIO16
-#define SDA         DIO17
+#define SCL         16
+#define SDA         17
 
 // Timers and PWM
-#define OC0A        DIO3
-#define OC0B        DIO4
-#define OC1A        DIO13
-#define OC1B        DIO12
-#define OC2A        DIO15
-#define OC2B        DIO14
+#define OC0A        3
+#define OC0B        4
+#define OC1A        13
+#define OC1B        12
+#define OC2A        15
+#define OC2B        14
 
 // Digital I/O
 

Marlin/src/HAL/AVR/fastio/fastio_AT90USB.h

@@ -27,18 +27,18 @@
  *   Logical Pin: 28 29 30 31 32 33 34 35 20 21 22 23 24 25 26 27 10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07 08 09(46*47)36 37 18 19 38 39 40 41 42 43 44 45
  *   Port:        A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 E0 E1 E2 E3 E4 E5 E6 E7 F0 F1 F2 F3 F4 F5 F6 F7
  *            The logical pins 46 and 47 are not supported by Teensyduino, but are supported below as E2 and E3
+ *
+ * Arduino Pin Layout video: https://youtu.be/rIqeVCX09FA
+ * AVR alternate pin function overview video: https://youtu.be/1yd8wuI5Plg
  */
 
 #include "../fastio.h"
 
-// change for your board
-#define DEBUG_LED   DIO31 /* led D5 red */
-
 // SPI
-#define SCK         DIO21  //  9
-#define MISO        DIO23  // 11
-#define MOSI        DIO22  // 10
-#define SS          DIO20  //  8
+#define SS          20  //  8
+#define SCK         21  //  9
+#define MOSI        22  // 10
+#define MISO        23  // 11
 
 // Digital I/O
 
@@ -679,7 +679,6 @@
 #define PF7_PWM     0
 #define PF7_DDR     DDRF
 
-
 /**
  * Some of the pin mapping functions of the Teensduino extension to the Arduino IDE
  * do not function the same as the other Arduino extensions.

Marlin/src/HAL/AVR/inc/Conditionals_LCD.h

@@ -21,6 +21,6 @@
  */
 #pragma once
 
-#if HAS_SPI_TFT || HAS_FSMC_TFT
-  #error "Sorry! TFT displays are not available for HAL/AVR."
+#ifndef SERIAL_PORT
+  #define SERIAL_PORT 0
 #endif

Marlin/src/HAL/AVR/inc/Conditionals_type.h

@@ -1,6 +1,6 @@
 /**
  * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2024 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
  * Based on Sprinter and grbl.
  * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm

Marlin/src/HAL/AVR/inc/SanityCheck.h

@@ -25,34 +25,91 @@
  * Test AVR-specific configuration values for errors at compile-time.
  */
 
+#if HAS_SPI_TFT || HAS_FSMC_TFT
+  #error "Sorry! TFT displays are not available for HAL/AVR."
+#endif
+
+/**
+ * Check for common serial pin conflicts
+ */
+#define CHECK_SERIAL_PIN(N) ( \
+     X_STOP_PIN == N || Y_STOP_PIN == N || Z_STOP_PIN  == N \
+  || X_MIN_PIN  == N || Y_MIN_PIN  == N || Z_MIN_PIN   == N \
+  || X_MAX_PIN  == N || Y_MAX_PIN  == N || Z_MAX_PIN   == N \
+  || X_STEP_PIN == N || Y_STEP_PIN == N || Z_STEP_PIN  == N \
+  || X_DIR_PIN  == N || Y_DIR_PIN  == N || Z_DIR_PIN   == N \
+  || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN   == N \
+  || BTN_EN1    == N || BTN_EN2    == N || LCD_PINS_EN == N \
+)
+#if SERIAL_IN_USE(0)
+  // D0-D1. No known conflicts.
+#endif
+#if SERIAL_IN_USE(1)
+  #if NOT_TARGET(__AVR_ATmega644P__, __AVR_ATmega1284P__)
+    #if CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19)
+      #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
+    #endif
+  #else
+    #if CHECK_SERIAL_PIN(10) || CHECK_SERIAL_PIN(11)
+      #error "Serial Port 1 pin D10 and/or D11 conflicts with another pin on the board."
+    #endif
+  #endif
+#endif
+#if SERIAL_IN_USE(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
+  #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
+#endif
+#if SERIAL_IN_USE(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
+  #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
+#endif
+#undef CHECK_SERIAL_PIN
+
 /**
  * Checks for FAST PWM
  */
-#if ENABLED(FAST_PWM_FAN) && (ENABLED(USE_OCR2A_AS_TOP) && defined(TCCR2))
-  #error "USE_OCR2A_AS_TOP does not apply to devices with a single output TIMER2"
+#if ALL(FAST_PWM_FAN, USE_OCR2A_AS_TOP, HAS_TCCR2)
+  #error "USE_OCR2A_AS_TOP does not apply to devices with a single output TIMER2."
+#endif
+
+/**
+ * Checks for SOFT PWM
+ */
+#if HAS_FAN0 && FAN0_PIN == 9 && DISABLED(FAN_SOFT_PWM) && ENABLED(SPEAKER)
+  #error "FAN0_PIN 9 Hardware PWM uses Timer 2 which conflicts with Arduino AVR Tone Timer (for SPEAKER)."
+  #error "Disable SPEAKER or enable FAN_SOFT_PWM."
 #endif
 
 /**
  * Sanity checks for Spindle / Laser PWM
  */
-#if ENABLED(SPINDLE_LASER_PWM)
+#if ENABLED(SPINDLE_LASER_USE_PWM)
   #include "../ServoTimers.h"   // Needed to check timer availability (_useTimer3)
   #if SPINDLE_LASER_PWM_PIN == 4 || WITHIN(SPINDLE_LASER_PWM_PIN, 11, 13)
     #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by a system interrupt."
   #elif NUM_SERVOS > 0 && defined(_useTimer3) && (WITHIN(SPINDLE_LASER_PWM_PIN, 2, 3) || SPINDLE_LASER_PWM_PIN == 5)
     #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by the servo system."
   #endif
-#elif defined(SPINDLE_LASER_FREQUENCY)
-  #error "SPINDLE_LASER_FREQUENCY requires SPINDLE_LASER_PWM."
+#elif SPINDLE_LASER_FREQUENCY
+  #error "SPINDLE_LASER_FREQUENCY requires SPINDLE_LASER_USE_PWM."
 #endif
 
 /**
  * The Trinamic library includes SoftwareSerial.h, leading to a compile error.
  */
-#if BOTH(HAS_TRINAMIC_CONFIG, ENDSTOP_INTERRUPTS_FEATURE)
+#if ALL(HAS_TRINAMIC_CONFIG, ENDSTOP_INTERRUPTS_FEATURE)
   #error "TMCStepper includes SoftwareSerial.h which is incompatible with ENDSTOP_INTERRUPTS_FEATURE. Disable ENDSTOP_INTERRUPTS_FEATURE to continue."
 #endif
 
-#if BOTH(HAS_TMC_SW_SERIAL, MONITOR_DRIVER_STATUS)
+#if ALL(HAS_TMC_SW_SERIAL, MONITOR_DRIVER_STATUS)
   #error "MONITOR_DRIVER_STATUS causes performance issues when used with SoftwareSerial-connected drivers. Disable MONITOR_DRIVER_STATUS or use hardware serial to continue."
 #endif
+
+/**
+ * Postmortem debugging
+ */
+#if ENABLED(POSTMORTEM_DEBUGGING)
+  #error "POSTMORTEM_DEBUGGING is not supported on AVR boards."
+#endif
+
+#if USING_PULLDOWNS
+  #error "PULLDOWN pin mode is not available on AVR boards."
+#endif

Marlin/src/HAL/AVR/math.h

@@ -27,15 +27,16 @@
 
 // intRes = longIn1 * longIn2 >> 24
 // uses:
-// A[tmp] to store 0
-// B[tmp] to store bits 16-23 of the 48bit result. The top bit is used to round the two byte result.
-// note that the lower two bytes and the upper byte of the 48bit result are not calculated.
-// this can cause the result to be out by one as the lower bytes may cause carries into the upper ones.
-// B A are bits 24-39 and are the returned value
-// C B A is longIn1
-// D C B A is longIn2
+// r1, r0 for the result of mul.
+// [tmp1] to store 0.
+// [tmp2] to store bits 16-23 of the 56 bit result. The top bit of [tmp2] is used for rounding.
+// Note that the lower two bytes and the upper two bytes of the 56 bit result are not calculated.
+// This can cause the result to be out by one as the lower bytes may cause carries into the upper ones.
+// [intRes] (A B) is bits 24-39 and is the returned value.
+// [longIn1] (C B A) is a 24 bit parameter.
+// [longIn2] (D C B A) is a 32 bit parameter.
 //
-static FORCE_INLINE uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2) {
+FORCE_INLINE static uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2) {
   uint8_t tmp1;
   uint8_t tmp2;
   uint16_t intRes;
@@ -66,11 +67,9 @@ static FORCE_INLINE uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2
     A("add %[tmp2], r1")
     A("adc %A[intRes], %[tmp1]")
     A("adc %B[intRes], %[tmp1]")
-    A("lsr %[tmp2]")
-    A("adc %A[intRes], %[tmp1]")
-    A("adc %B[intRes], %[tmp1]")
     A("mul %D[longIn2], %A[longIn1]")
-    A("add %A[intRes], r0")
+    A("lsl %[tmp2]")
+    A("adc %A[intRes], r0")
     A("adc %B[intRes], r1")
     A("mul %D[longIn2], %B[longIn1]")
     A("add %B[intRes], r0")
@@ -85,29 +84,26 @@ static FORCE_INLINE uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2
   return intRes;
 }
 
-// intRes = intIn1 * intIn2 >> 16
+// charRes = charIn1 * charIn2 >> 8
 // uses:
-// r26 to store 0
-// r27 to store the byte 1 of the 24 bit result
-static FORCE_INLINE uint16_t MultiU16X8toH16(uint8_t charIn1, uint16_t intIn2) {
-  uint8_t tmp;
-  uint16_t intRes;
+// r1, r0 for the result of mul. After the mul, r0 holds bits 0-7 of the 16 bit result,
+//        and the top bit of r0 is used for rounding.
+// [charRes] is bits 8-15 and is the returned value.
+// [charIn1] is an 8 bit parameter.
+// [charIn2] is an 8 bit parameter.
+//
+FORCE_INLINE static uint8_t MultiU8X8toH8(uint8_t charIn1, uint8_t charIn2) {
+  uint8_t charRes;
   __asm__ __volatile__ (
-    A("clr %[tmp]")
-    A("mul %[charIn1], %B[intIn2]")
-    A("movw %A[intRes], r0")
-    A("mul %[charIn1], %A[intIn2]")
-    A("add %A[intRes], r1")
-    A("adc %B[intRes], %[tmp]")
-    A("lsr r0")
-    A("adc %A[intRes], %[tmp]")
-    A("adc %B[intRes], %[tmp]")
+    A("mul %[charIn1], %[charIn2]")
+    A("mov %[charRes], r1")
     A("clr r1")
-      : [intRes] "=&r" (intRes),
-        [tmp] "=&r" (tmp)
+    A("lsl r0")
+    A("adc %[charRes], r1")
+      : [charRes] "=&r" (charRes)
       : [charIn1] "d" (charIn1),
-        [intIn2] "d" (intIn2)
+        [charIn2] "d" (charIn2)
       : "cc"
   );
-  return intRes;
+  return charRes;
 }

Marlin/src/HAL/AVR/pinsDebug.h

@@ -2,6 +2,9 @@
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -38,7 +41,7 @@
   // portModeRegister takes a different argument
   #define digitalPinToTimer_DEBUG(p) digitalPinToTimer(p)
   #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(p)
-  #define digitalPinToPort_DEBUG(p) digitalPinToPort_Teensy(p)
+  #define digitalPinToPort_DEBUG(p) digitalPinToPort(p)
   #define GET_PINMODE(pin) (*portModeRegister(pin) & digitalPinToBitMask_DEBUG(pin))
 
 #elif AVR_ATmega2560_FAMILY_PLUS_70   // So we can access/display all the pins on boards using more than 70
@@ -61,23 +64,25 @@
 
 #define VALID_PIN(pin) (pin >= 0 && pin < NUM_DIGITAL_PINS ? 1 : 0)
 #if AVR_ATmega1284_FAMILY
-  #define DIGITAL_PIN_TO_ANALOG_PIN(P) int(analogInputToDigitalPin(0) - (P))
-  #define IS_ANALOG(P) ((P) >= analogInputToDigitalPin(7) && (P) <= analogInputToDigitalPin(0))
+  #define IS_ANALOG(P) WITHIN(P, analogInputToDigitalPin(7), analogInputToDigitalPin(0))
+  #define DIGITAL_PIN_TO_ANALOG_PIN(P) int(IS_ANALOG(P) ? (P) - analogInputToDigitalPin(7) : -1)
 #else
-  #define DIGITAL_PIN_TO_ANALOG_PIN(P) int((P) - analogInputToDigitalPin(0))
-  #define IS_ANALOG(P) ((P) >= analogInputToDigitalPin(0) && ((P) <= analogInputToDigitalPin(15) || (P) <= analogInputToDigitalPin(7)))
+  #define _ANALOG1(P) WITHIN(P, analogInputToDigitalPin(0), analogInputToDigitalPin(7))
+  #define _ANALOG2(P) WITHIN(P, analogInputToDigitalPin(8), analogInputToDigitalPin(15))
+  #define IS_ANALOG(P) (_ANALOG1(P) || _ANALOG2(P))
+  #define DIGITAL_PIN_TO_ANALOG_PIN(P) int(_ANALOG1(P) ? (P) - analogInputToDigitalPin(0) : _ANALOG2(P) ? (P) - analogInputToDigitalPin(8) + 8 : -1)
 #endif
 #define GET_ARRAY_PIN(p) pgm_read_byte(&pin_array[p].pin)
 #define MULTI_NAME_PAD 26 // space needed to be pretty if not first name assigned to a pin
 
 void PRINT_ARRAY_NAME(uint8_t x) {
-  char *name_mem_pointer = (char*)pgm_read_ptr(&pin_array[x].name);
-  LOOP_L_N(y, MAX_NAME_LENGTH) {
+  PGM_P const name_mem_pointer = (PGM_P)pgm_read_ptr(&pin_array[x].name);
+  for (uint8_t y = 0; y < MAX_NAME_LENGTH; ++y) {
     char temp_char = pgm_read_byte(name_mem_pointer + y);
     if (temp_char != 0)
       SERIAL_CHAR(temp_char);
     else {
-      LOOP_L_N(i, MAX_NAME_LENGTH - y) SERIAL_CHAR(' ');
+      for (uint8_t i = 0; i < MAX_NAME_LENGTH - y; ++i) SERIAL_CHAR(' ');
       break;
     }
   }
@@ -85,7 +90,6 @@ void PRINT_ARRAY_NAME(uint8_t x) {
 
 #define GET_ARRAY_IS_DIGITAL(x)   pgm_read_byte(&pin_array[x].is_digital)
 
-
 #if defined(__AVR_ATmega1284P__)  // 1284 IDE extensions set this to the number of
   #undef NUM_DIGITAL_PINS         // digital only pins while all other CPUs have it
   #define NUM_DIGITAL_PINS 32     // set to digital only + digital/analog
@@ -99,18 +103,18 @@ void PRINT_ARRAY_NAME(uint8_t x) {
       return true;                                              \
     } else return false
 
-
+#define ABTEST(N) defined(TCCR##N##A) && defined(COM##N##A1)
 
 /**
  * Print a pin's PWM status.
  * Return true if it's currently a PWM pin.
  */
-static bool pwm_status(uint8_t pin) {
+bool pwm_status(uint8_t pin) {
   char buffer[20];   // for the sprintf statements
 
   switch (digitalPinToTimer_DEBUG(pin)) {
 
-    #if defined(TCCR0A) && defined(COM0A1)
+    #if ABTEST(0)
       #ifdef TIMER0A
         #if !AVR_AT90USB1286_FAMILY  // not available in Teensyduino type IDEs
           PWM_CASE(0, A);
@@ -119,20 +123,20 @@ static bool pwm_status(uint8_t pin) {
       PWM_CASE(0, B);
     #endif
 
-    #if defined(TCCR1A) && defined(COM1A1)
+    #if ABTEST(1)
       PWM_CASE(1, A);
       PWM_CASE(1, B);
-     #if defined(COM1C1) && defined(TIMER1C)
-      PWM_CASE(1, C);
-     #endif
+      #if defined(COM1C1) && defined(TIMER1C)
+        PWM_CASE(1, C);
+      #endif
     #endif
 
-    #if defined(TCCR2A) && defined(COM2A1)
+    #if ABTEST(2)
       PWM_CASE(2, A);
       PWM_CASE(2, B);
     #endif
 
-    #if defined(TCCR3A) && defined(COM3A1)
+    #if ABTEST(3)
       PWM_CASE(3, A);
       PWM_CASE(3, B);
       #ifdef COM3C1
@@ -146,7 +150,7 @@ static bool pwm_status(uint8_t pin) {
       PWM_CASE(4, C);
     #endif
 
-    #if defined(TCCR5A) && defined(COM5A1)
+    #if ABTEST(5)
       PWM_CASE(5, A);
       PWM_CASE(5, B);
       PWM_CASE(5, C);
@@ -159,25 +163,23 @@ static bool pwm_status(uint8_t pin) {
   SERIAL_ECHO_SP(2);
 } // pwm_status
 
-
 const volatile uint8_t* const PWM_other[][3] PROGMEM = {
     { &TCCR0A, &TCCR0B, &TIMSK0 },
     { &TCCR1A, &TCCR1B, &TIMSK1 },
-  #if defined(TCCR2A) && defined(COM2A1)
+  #if ABTEST(2)
     { &TCCR2A, &TCCR2B, &TIMSK2 },
   #endif
-  #if defined(TCCR3A) && defined(COM3A1)
+  #if ABTEST(3)
     { &TCCR3A, &TCCR3B, &TIMSK3 },
   #endif
   #ifdef TCCR4A
     { &TCCR4A, &TCCR4B, &TIMSK4 },
   #endif
-  #if defined(TCCR5A) && defined(COM5A1)
+  #if ABTEST(5)
     { &TCCR5A, &TCCR5B, &TIMSK5 },
   #endif
 };
 
-
 const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
 
   #ifdef TIMER0A
@@ -192,11 +194,11 @@ const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
    { (const uint8_t*)&OCR1A, (const uint8_t*)&OCR1B, 0 },
   #endif
 
-  #if defined(TCCR2A) && defined(COM2A1)
+  #if ABTEST(2)
     { &OCR2A, &OCR2B, 0 },
   #endif
 
-  #if defined(TCCR3A) && defined(COM3A1)
+  #if ABTEST(3)
     #ifdef COM3C1
       { (const uint8_t*)&OCR3A, (const uint8_t*)&OCR3B, (const uint8_t*)&OCR3C },
     #else
@@ -208,12 +210,11 @@ const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
     { (const uint8_t*)&OCR4A, (const uint8_t*)&OCR4B, (const uint8_t*)&OCR4C },
   #endif
 
-  #if defined(TCCR5A) && defined(COM5A1)
+  #if ABTEST(5)
     { (const uint8_t*)&OCR5A, (const uint8_t*)&OCR5B, (const uint8_t*)&OCR5C },
   #endif
 };
 
-
 #define TCCR_A(T)   pgm_read_word(&PWM_other[T][0])
 #define TCCR_B(T)   pgm_read_word(&PWM_other[T][1])
 #define TIMSK(T)    pgm_read_word(&PWM_other[T][2])
@@ -228,16 +229,16 @@ const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
 
 #define OCR_VAL(T, L)   pgm_read_word(&PWM_OCR[T][L])
 
-static void err_is_counter()     { SERIAL_ECHOPGM("   non-standard PWM mode"); }
-static void err_is_interrupt()   { SERIAL_ECHOPGM("   compare interrupt enabled"); }
-static void err_prob_interrupt() { SERIAL_ECHOPGM("   overflow interrupt enabled"); }
-static void print_is_also_tied() { SERIAL_ECHOPGM(" is also tied to this pin"); SERIAL_ECHO_SP(14); }
+void err_is_counter()     { SERIAL_ECHOPGM("   non-standard PWM mode"); }
+void err_is_interrupt()   { SERIAL_ECHOPGM("   compare interrupt enabled"); }
+void err_prob_interrupt() { SERIAL_ECHOPGM("   overflow interrupt enabled"); }
+void print_is_also_tied() { SERIAL_ECHOPGM(" is also tied to this pin"); SERIAL_ECHO_SP(14); }
 
-inline void com_print(const uint8_t N, const uint8_t Z) {
+void com_print(const uint8_t N, const uint8_t Z) {
   const uint8_t *TCCRA = (uint8_t*)TCCR_A(N);
-  SERIAL_ECHOPGM("    COM");
-  SERIAL_CHAR('0' + N, Z);
-  SERIAL_ECHOPAIR(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
+  SERIAL_ECHOPGM("    COM", AS_DIGIT(N));
+  SERIAL_CHAR(Z);
+  SERIAL_ECHOPGM(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
 }
 
 void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N - WGM bit layout
@@ -247,8 +248,8 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   uint8_t WGM = (((*TCCRB & _BV(WGM_2)) >> 1) | (*TCCRA & (_BV(WGM_0) | _BV(WGM_1))));
   if (N == 4) WGM |= ((*TCCRB & _BV(WGM_3)) >> 1);
 
-  SERIAL_ECHOPGM("    TIMER");
-  SERIAL_CHAR(T + '0', L);
+  SERIAL_ECHOPGM("    TIMER", AS_DIGIT(T));
+  SERIAL_CHAR(L);
   SERIAL_ECHO_SP(3);
 
   if (N == 3) {
@@ -259,22 +260,14 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
     const uint16_t *OCRVAL16 = (uint16_t*)OCR_VAL(T, L - 'A');
     PWM_PRINT(*OCRVAL16);
   }
-  SERIAL_ECHOPAIR("    WGM: ", WGM);
+  SERIAL_ECHOPGM("    WGM: ", WGM);
   com_print(T,L);
-  SERIAL_ECHOPAIR("    CS: ", (*TCCRB & (_BV(CS_0) | _BV(CS_1) | _BV(CS_2)) ));
-
-  SERIAL_ECHOPGM("    TCCR");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR("A: ", *TCCRA);
-
-  SERIAL_ECHOPGM("    TCCR");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR("B: ", *TCCRB);
+  SERIAL_ECHOPGM("    CS: ", (*TCCRB & (_BV(CS_0) | _BV(CS_1) | _BV(CS_2)) ));
+  SERIAL_ECHOPGM("    TCCR", AS_DIGIT(T), "A: ", *TCCRA);
+  SERIAL_ECHOPGM("    TCCR", AS_DIGIT(T), "B: ", *TCCRB);
 
   const uint8_t *TMSK = (uint8_t*)TIMSK(T);
-  SERIAL_ECHOPGM("    TIMSK");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR(": ", *TMSK);
+  SERIAL_ECHOPGM("    TIMSK", AS_DIGIT(T), ": ", *TMSK);
 
   const uint8_t OCIE = L - 'A' + 1;
   if (N == 3) { if (WGM == 0 || WGM == 2 || WGM ==  4 || WGM ==  6) err_is_counter(); }
@@ -283,10 +276,10 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   if (TEST(*TMSK, TOIE)) err_prob_interrupt();
 }
 
-static void pwm_details(uint8_t pin) {
+void pwm_details(uint8_t pin) {
   switch (digitalPinToTimer_DEBUG(pin)) {
 
-    #if defined(TCCR0A) && defined(COM0A1)
+    #if ABTEST(0)
       #ifdef TIMER0A
         #if !AVR_AT90USB1286_FAMILY  // not available in Teensyduino type IDEs
           case TIMER0A: timer_prefix(0, 'A', 3); break;
@@ -295,7 +288,7 @@ static void pwm_details(uint8_t pin) {
       case TIMER0B: timer_prefix(0, 'B', 3); break;
     #endif
 
-    #if defined(TCCR1A) && defined(COM1A1)
+    #if ABTEST(1)
       case TIMER1A: timer_prefix(1, 'A', 4); break;
       case TIMER1B: timer_prefix(1, 'B', 4); break;
       #if defined(COM1C1) && defined(TIMER1C)
@@ -303,12 +296,12 @@ static void pwm_details(uint8_t pin) {
       #endif
     #endif
 
-    #if defined(TCCR2A) && defined(COM2A1)
+    #if ABTEST(2)
       case TIMER2A: timer_prefix(2, 'A', 3); break;
       case TIMER2B: timer_prefix(2, 'B', 3); break;
     #endif
 
-    #if defined(TCCR3A) && defined(COM3A1)
+    #if ABTEST(3)
       case TIMER3A: timer_prefix(3, 'A', 4); break;
       case TIMER3B: timer_prefix(3, 'B', 4); break;
       #ifdef COM3C1
@@ -322,7 +315,7 @@ static void pwm_details(uint8_t pin) {
       case TIMER4C: timer_prefix(4, 'C', 4); break;
     #endif
 
-    #if defined(TCCR5A) && defined(COM5A1)
+    #if ABTEST(5)
       case TIMER5A: timer_prefix(5, 'A', 4); break;
       case TIMER5B: timer_prefix(5, 'B', 4); break;
       case TIMER5C: timer_prefix(5, 'C', 4); break;
@@ -356,48 +349,44 @@ static void pwm_details(uint8_t pin) {
   #endif
 } // pwm_details
 
-
 #ifndef digitalRead_mod                   // Use Teensyduino's version of digitalRead - it doesn't disable the PWMs
-  int digitalRead_mod(const int8_t pin) { // same as digitalRead except the PWM stop section has been removed
+  int digitalRead_mod(const pin_t pin) {  // same as digitalRead except the PWM stop section has been removed
     const uint8_t port = digitalPinToPort_DEBUG(pin);
     return (port != NOT_A_PIN) && (*portInputRegister(port) & digitalPinToBitMask_DEBUG(pin)) ? HIGH : LOW;
   }
 #endif
 
-#ifndef PRINT_PORT
+void print_port(const pin_t pin) {   // print port number
+  #ifdef digitalPinToPort_DEBUG
+    uint8_t x;
+    SERIAL_ECHOPGM("  Port: ");
+    #if AVR_AT90USB1286_FAMILY
+      x = (pin == 46 || pin == 47) ? 'E' : digitalPinToPort_DEBUG(pin) + 64;
+    #else
+      x = digitalPinToPort_DEBUG(pin) + 64;
+    #endif
+    SERIAL_CHAR(x);
 
-  void print_port(int8_t pin) {   // print port number
-    #ifdef digitalPinToPort_DEBUG
-      uint8_t x;
-      SERIAL_ECHOPGM("  Port: ");
-      #if AVR_AT90USB1286_FAMILY
-        x = (pin == 46 || pin == 47) ? 'E' : digitalPinToPort_DEBUG(pin) + 64;
-      #else
-        x = digitalPinToPort_DEBUG(pin) + 64;
-      #endif
-      SERIAL_CHAR(x);
-
-      #if AVR_AT90USB1286_FAMILY
-        if (pin == 46)
-          x = '2';
-        else if (pin == 47)
-          x = '3';
-        else {
-          uint8_t temp = digitalPinToBitMask_DEBUG(pin);
-          for (x = '0'; x < '9' && temp != 1; x++) temp >>= 1;
-        }
-      #else
+    #if AVR_AT90USB1286_FAMILY
+      if (pin == 46)
+        x = '2';
+      else if (pin == 47)
+        x = '3';
+      else {
         uint8_t temp = digitalPinToBitMask_DEBUG(pin);
         for (x = '0'; x < '9' && temp != 1; x++) temp >>= 1;
-      #endif
-      SERIAL_CHAR(x);
+      }
     #else
-      SERIAL_ECHO_SP(10);
+      uint8_t temp = digitalPinToBitMask_DEBUG(pin);
+      for (x = '0'; x < '9' && temp != 1; x++) temp >>= 1;
     #endif
-  }
-
-  #define PRINT_PORT(p) print_port(p)
-
-#endif
+    SERIAL_CHAR(x);
+  #else
+    SERIAL_ECHO_SP(10);
+  #endif
+}
 
 #define PRINT_PIN(p) do{ sprintf_P(buffer, PSTR("%3d "), p); SERIAL_ECHO(buffer); }while(0)
+#define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
+
+#undef ABTEST

Marlin/src/HAL/AVR/pinsDebug_Teensyduino.h

@@ -2,6 +2,9 @@
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -19,11 +22,10 @@
 #pragma once
 
 //
-//  some of the pin mapping functions of the Teensduino extension to the Arduino IDE
-//  do not function the same as the other Arduino extensions
+// Some of the pin mapping functions of the Arduino IDE Teensduino extension
+// function differently from other Arduino extensions.
 //
 
-
 #define TEENSYDUINO_IDE
 
 //digitalPinToTimer(pin) function works like Arduino but Timers are not defined
@@ -45,8 +47,6 @@
 #define PE 5
 #define PF 6
 
-#undef digitalPinToPort
-
 const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
   PD, // 0  - PD0 - INT0 - PWM
   PD, // 1  - PD1 - INT1 - PWM
@@ -98,7 +98,7 @@ const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
   PE, // 47 - PE3 (not defined in teensyduino)
 };
 
-#define digitalPinToPort(P) ( pgm_read_byte( digital_pin_to_port_PGM + (P) ) )
+#define digitalPinToPort(P) pgm_read_byte(digital_pin_to_port_PGM[P])
 
 // digitalPinToBitMask(pin) is OK
 

Marlin/src/HAL/AVR/pinsDebug_plus_70.h

@@ -2,6 +2,9 @@
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -228,7 +231,6 @@ const uint8_t PROGMEM digital_pin_to_bit_mask_PGM_plus_70[] = {
 
 #define digitalPinToBitMask_plus_70(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM_plus_70 + (P) ) )
 
-
 const uint8_t PROGMEM digital_pin_to_timer_PGM_plus_70[] = {
   // TIMERS
   // ------------------------

Marlin/src/HAL/AVR/registers.cpp

@@ -0,0 +1,979 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __AVR__
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(HAL_AVR_DIRTY_INIT)
+
+#include "registers.h"
+
+// Since the compiler could be creating multiple copies of function code-graphs for each header inline-inclusion,
+// we want to off-load the function definitions that define static memory into this solitary compilation unit.
+// This way the ROM is NOT bloated (who knows if the compiler is optimizing same-content constant objects into one?)
+
+ATmegaPinFunctions _ATmega_getPinFunctions(int pin) {
+  if (pin < 0) return {};
+
+  ATmegaPinInfo info = _ATmega_getPinInfo((unsigned int)pin);
+
+  #ifdef __AVR_TRM01__
+    if (info.port == eATmegaPort::PORT_A) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_B) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC0A, eATmegaPinFunc::TOC1C, eATmegaPinFunc::PCI7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1B, eATmegaPinFunc::PCI6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1A, eATmegaPinFunc::PCI5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC2A, eATmegaPinFunc::PCI4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MISO, eATmegaPinFunc::PCI3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MOSI, eATmegaPinFunc::PCI2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_SCK, eATmegaPinFunc::PCI1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_CS, eATmegaPinFunc::PCI0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_C) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD15 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD14 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD13 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD12 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD11 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD9 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_D) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER0_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART1_CLK };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ICP };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT3, eATmegaPinFunc::USART1_TXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT2, eATmegaPinFunc::USART1_RXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT1, eATmegaPinFunc::TWI_SDA };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT0, eATmegaPinFunc::TWI_CLK };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_E) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT7, eATmegaPinFunc::TIMER3_ICP, eATmegaPinFunc::CLKO };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT6, eATmegaPinFunc::TIMER3_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT5, eATmegaPinFunc::TOC3C };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT4, eATmegaPinFunc::TOC3B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN1, eATmegaPinFunc::TOC3A };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN0, eATmegaPinFunc::USART0_CLK };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PDO, eATmegaPinFunc::USART0_TXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PDI, eATmegaPinFunc::USART0_RXD, eATmegaPinFunc::PCI8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_F) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_G) {
+      if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC0B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3 ) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_ALE };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_RD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_WR };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_H) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER4_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC2B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC4C };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC4B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC4A };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART2_CLK };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART2_TXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART2_RXD };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_J) {
+      if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI15 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI14 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI13 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI12 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART3_CLK, eATmegaPinFunc::PCI11 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART3_TXD, eATmegaPinFunc::PCI10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART3_RXD, eATmegaPinFunc::PCI9 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_K) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC15, eATmegaPinFunc::PCI23 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC14, eATmegaPinFunc::PCI22 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC13, eATmegaPinFunc::PCI21 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC12, eATmegaPinFunc::PCI20 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC11, eATmegaPinFunc::PCI19 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC10, eATmegaPinFunc::PCI18 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC9, eATmegaPinFunc::PCI17 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC8, eATmegaPinFunc::PCI16 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_L) {
+      if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC5C };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC5B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC5A };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER5_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER5_ICP };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER4_ICP };
+        return { funcs, countof(funcs) };
+      }
+    }
+  #elif defined(__AVR_TRM02__)
+    if (info.port == eATmegaPort::PORT_A) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI7, eATmegaPinFunc::ADC7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI6, eATmegaPinFunc::ADC6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI5, eATmegaPinFunc::ADC5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI4, eATmegaPinFunc::ADC4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI3, eATmegaPinFunc::ADC3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI2, eATmegaPinFunc::ADC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI1, eATmegaPinFunc::ADC1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI0, eATmegaPinFunc::ADC0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_B) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_SCK, eATmegaPinFunc::TOC3B, eATmegaPinFunc::PCI15 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MISO, eATmegaPinFunc::TOC3A, eATmegaPinFunc::PCI14 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MOSI, eATmegaPinFunc::TIMER3_ICP, eATmegaPinFunc::PCI13 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_CS, eATmegaPinFunc::TOC0B, eATmegaPinFunc::PCI12 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN1, eATmegaPinFunc::TOC0A, eATmegaPinFunc::PCI11 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN0, eATmegaPinFunc::EINT2, eATmegaPinFunc::PCI10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ECI, eATmegaPinFunc::CLKO, eATmegaPinFunc::PCI9 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER0_ECI, eATmegaPinFunc::USART0_CLK, eATmegaPinFunc::PCI8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_C) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC2, eATmegaPinFunc::PCI23 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC1, eATmegaPinFunc::PCI22 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI21 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI20 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI19 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI18 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI17, eATmegaPinFunc::TWI_SDA };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TWI_CLK, eATmegaPinFunc::PCI16 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_D) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC2A, eATmegaPinFunc::PCI31 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ICP, eATmegaPinFunc::TOC2B, eATmegaPinFunc::PCI30 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1A, eATmegaPinFunc::PCI29 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1B, eATmegaPinFunc::USART1_CLK, eATmegaPinFunc::PCI28 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT1, eATmegaPinFunc::USART1_TXD, eATmegaPinFunc::PCI27 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT0, eATmegaPinFunc::USART1_RXD, eATmegaPinFunc::PCI26 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART0_TXD, eATmegaPinFunc::PCI25 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART0_TXD, eATmegaPinFunc::PCI24, eATmegaPinFunc::TIMER3_ECI };
+        return { funcs, countof(funcs) };
+      }
+    }
+  #elif defined(__AVR_TRM03__)
+    if (info.port == eATmegaPort::PORT_B) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::XTAL2, eATmegaPinFunc::TOSC2, eATmegaPinFunc::PCI7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::XTAL1, eATmegaPinFunc::TOSC1, eATmegaPinFunc::PCI6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_SCK, eATmegaPinFunc::PCI5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MISO, eATmegaPinFunc::PCI4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MOSI, eATmegaPinFunc::TOC2A, eATmegaPinFunc::PCI3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_CS, eATmegaPinFunc::TOC1B, eATmegaPinFunc::PCI2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1A, eATmegaPinFunc::PCI1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ICP, eATmegaPinFunc::CLKO, eATmegaPinFunc::PCI0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_C) {
+      if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI14 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC5, eATmegaPinFunc::TWI_CLK, eATmegaPinFunc::PCI13 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC4, eATmegaPinFunc::TWI_SDA, eATmegaPinFunc::PCI12 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC3, eATmegaPinFunc::PCI11 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC2, eATmegaPinFunc::PCI10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC1, eATmegaPinFunc::PCI9 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC0, eATmegaPinFunc::PCI8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_D) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN1, eATmegaPinFunc::PCI23 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN0, eATmegaPinFunc::TOC0A, eATmegaPinFunc::PCI22 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ECI, eATmegaPinFunc::TOC0B, eATmegaPinFunc::PCI21 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART_CLK, eATmegaPinFunc::TIMER0_ECI, eATmegaPinFunc::PCI20 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT1, eATmegaPinFunc::TOC2B, eATmegaPinFunc::PCI19 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT0, eATmegaPinFunc::PCI18 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART_TXD, eATmegaPinFunc::PCI17 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART_RXD, eATmegaPinFunc::PCI16 };
+        return { funcs, countof(funcs) };
+      }
+    }
+  #elif defined(__AVR_TRM04__)
+    if (info.port == eATmegaPort::PORT_A) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_B) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC0A, eATmegaPinFunc::TOC1C, eATmegaPinFunc::PCI7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1B, eATmegaPinFunc::PCI6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1A, eATmegaPinFunc::PCI5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC2A, eATmegaPinFunc::PCI4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PDO, eATmegaPinFunc::SPI_MISO, eATmegaPinFunc::PCI3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PDI, eATmegaPinFunc::SPI_MOSI, eATmegaPinFunc::PCI2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_SCK, eATmegaPinFunc::PCI1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_CS, eATmegaPinFunc::PCI0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_C) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD15, eATmegaPinFunc::TIMER3_ICP, eATmegaPinFunc::CLKO };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD14, eATmegaPinFunc::TOC3A };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD13, eATmegaPinFunc::TOC3B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD12, eATmegaPinFunc::TOC3C };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD11, eATmegaPinFunc::TIMER3_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD9 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_AD8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_D) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER0_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_CLKI };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART1_CLK };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ICP };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT3, eATmegaPinFunc::USART1_TXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT2, eATmegaPinFunc::USART1_RXD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT1, eATmegaPinFunc::TWI_SDA, eATmegaPinFunc::TOC2B };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT0, eATmegaPinFunc::TWI_CLK, eATmegaPinFunc::TOC0B };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_E) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT7, eATmegaPinFunc::AIN1, eATmegaPinFunc::UVCON };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT6, eATmegaPinFunc::AIN0 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT5, eATmegaPinFunc::TOSC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT4, eATmegaPinFunc::TOSC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::UID };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_ALE };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_RD };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EXTMEM_WR };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_F) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+  #elif defined(__AVR_TRM05__)
+    if (info.port == eATmegaPort::PORT_A) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC7, eATmegaPinFunc::PCI7 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC6, eATmegaPinFunc::PCI6 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC5, eATmegaPinFunc::PCI5 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC4, eATmegaPinFunc::PCI4 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC3, eATmegaPinFunc::PCI3 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC2, eATmegaPinFunc::PCI2 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC1, eATmegaPinFunc::PCI1 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::ADC0, eATmegaPinFunc::PCI0 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_B) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_SCK, eATmegaPinFunc::PCI15 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MISO, eATmegaPinFunc::PCI14 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_MOSI, eATmegaPinFunc::PCI13 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::SPI_CS, eATmegaPinFunc::TOC0B, eATmegaPinFunc::PCI12 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN1, eATmegaPinFunc::TOC0A, eATmegaPinFunc::PCI11 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::AIN0, eATmegaPinFunc::EINT2, eATmegaPinFunc::PCI10 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ECI, eATmegaPinFunc::CLKO, eATmegaPinFunc::PCI9 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER0_ECI, eATmegaPinFunc::USART0_CLK, eATmegaPinFunc::PCI8 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_C) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC2, eATmegaPinFunc::PCI23 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOSC1, eATmegaPinFunc::PCI22 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI21 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI20 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI19 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::PCI18 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TWI_SDA, eATmegaPinFunc::PCI17 };
+        return { funcs, countof(funcs) };
+      }
+      else if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TWI_CLK, eATmegaPinFunc::PCI16 };
+        return { funcs, countof(funcs) };
+      }
+    }
+    else if (info.port == eATmegaPort::PORT_D) {
+      if (info.pinidx == 7) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC2A, eATmegaPinFunc::PCI31 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 6) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TIMER1_ICP, eATmegaPinFunc::TOC2B, eATmegaPinFunc::PCI30 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 5) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1A, eATmegaPinFunc::PCI29 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 4) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::TOC1B, eATmegaPinFunc::USART1_CLK, eATmegaPinFunc::PCI28 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 3) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT1, eATmegaPinFunc::USART1_TXD, eATmegaPinFunc::PCI27 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 2) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::EINT0, eATmegaPinFunc::USART1_RXD, eATmegaPinFunc::PCI26 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 1) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART0_TXD, eATmegaPinFunc::PCI25 };
+        return { funcs, countof(funcs) };
+      }
+      if (info.pinidx == 0) {
+        static const eATmegaPinFunc funcs[] = { eATmegaPinFunc::USART0_RXD, eATmegaPinFunc::PCI24 };
+        return { funcs, countof(funcs) };
+      }
+    }
+  #endif
+
+  return ATmegaPinFunctions();  // default and empty.
+}
+
+#endif // HAL_AVR_DIRTY_INIT
+#endif // __AVR__

Marlin/src/HAL/AVR/spi_pins.h

@@ -51,15 +51,15 @@
   #define AVR_SS_PIN   16
 #endif
 
-#ifndef SCK_PIN
-  #define SCK_PIN  AVR_SCK_PIN
+#ifndef SD_SCK_PIN
+  #define SD_SCK_PIN  AVR_SCK_PIN
 #endif
-#ifndef MISO_PIN
-  #define MISO_PIN AVR_MISO_PIN
+#ifndef SD_MISO_PIN
+  #define SD_MISO_PIN AVR_MISO_PIN
 #endif
-#ifndef MOSI_PIN
-  #define MOSI_PIN AVR_MOSI_PIN
+#ifndef SD_MOSI_PIN
+  #define SD_MOSI_PIN AVR_MOSI_PIN
 #endif
-#ifndef SS_PIN
-  #define SS_PIN   AVR_SS_PIN
+#ifndef SD_SS_PIN
+  #define SD_SS_PIN   AVR_SS_PIN
 #endif

Marlin/src/HAL/AVR/timers.h

@@ -1,7 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -34,37 +36,37 @@ typedef uint16_t hal_timer_t;
 
 #define HAL_TIMER_RATE          ((F_CPU) / 8)    // i.e., 2MHz or 2.5MHz
 
-#ifndef STEP_TIMER_NUM
-  #define STEP_TIMER_NUM        1
+#ifndef MF_TIMER_STEP
+  #define MF_TIMER_STEP         1
 #endif
-#ifndef PULSE_TIMER_NUM
-  #define PULSE_TIMER_NUM       STEP_TIMER_NUM
+#ifndef MF_TIMER_PULSE
+  #define MF_TIMER_PULSE        MF_TIMER_STEP
 #endif
-#ifndef TEMP_TIMER_NUM
-  #define TEMP_TIMER_NUM        0
+#ifndef MF_TIMER_TEMP
+  #define MF_TIMER_TEMP         0
 #endif
 
-#define TEMP_TIMER_FREQUENCY    ((F_CPU) / 64.0 / 256.0)
+#define TEMP_TIMER_FREQUENCY    (((F_CPU) + 0x2000) / 0x4000)
 
 #define STEPPER_TIMER_RATE      HAL_TIMER_RATE
 #define STEPPER_TIMER_PRESCALE  8
-#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // Cannot be of type double
+#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000)
 
-#define PULSE_TIMER_RATE       STEPPER_TIMER_RATE   // frequency of pulse timer
-#define PULSE_TIMER_PRESCALE   STEPPER_TIMER_PRESCALE
+#define PULSE_TIMER_RATE         STEPPER_TIMER_RATE
+#define PULSE_TIMER_PRESCALE     STEPPER_TIMER_PRESCALE
 #define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT()  SBI(TIMSK1, OCIE1A)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() CBI(TIMSK1, OCIE1A)
 #define STEPPER_ISR_ENABLED()             TEST(TIMSK1, OCIE1A)
 
-#define ENABLE_TEMPERATURE_INTERRUPT()     SBI(TIMSK0, OCIE0B)
-#define DISABLE_TEMPERATURE_INTERRUPT()    CBI(TIMSK0, OCIE0B)
-#define TEMPERATURE_ISR_ENABLED()         TEST(TIMSK0, OCIE0B)
+#define ENABLE_TEMPERATURE_INTERRUPT()     SBI(TIMSK0, OCIE0A)
+#define DISABLE_TEMPERATURE_INTERRUPT()    CBI(TIMSK0, OCIE0A)
+#define TEMPERATURE_ISR_ENABLED()         TEST(TIMSK0, OCIE0A)
 
 FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
   switch (timer_num) {
-    case STEP_TIMER_NUM:
+    case MF_TIMER_STEP:
       // waveform generation = 0100 = CTC
       SET_WGM(1, CTC_OCRnA);
 
@@ -84,10 +86,10 @@ FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
       TCNT1 = 0;
       break;
 
-    case TEMP_TIMER_NUM:
+    case MF_TIMER_TEMP:
       // Use timer0 for temperature measurement
       // Interleave temperature interrupt with millies interrupt
-      OCR0B = 128;
+      OCR0A = 128;
       break;
   }
 }
@@ -109,12 +111,12 @@ FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
  * (otherwise, characters will be lost due to UART overflow).
  * Then: Stepper, Endstops, Temperature, and -finally- all others.
  */
-#define HAL_timer_isr_prologue(TIMER_NUM)
-#define HAL_timer_isr_epilogue(TIMER_NUM)
+#define HAL_timer_isr_prologue(T) NOOP
+#define HAL_timer_isr_epilogue(T) NOOP
 
-/* 18 cycles maximum latency */
 #ifndef HAL_STEP_TIMER_ISR
 
+/* 18 cycles maximum latency */
 #define HAL_STEP_TIMER_ISR() \
 extern "C" void TIMER1_COMPA_vect() __attribute__ ((signal, naked, used, externally_visible)); \
 extern "C" void TIMER1_COMPA_vect_bottom() asm ("TIMER1_COMPA_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
@@ -180,7 +182,7 @@ void TIMER1_COMPA_vect() { \
     :                                   \
     : [timsk0] "i" ((uint16_t)&TIMSK0), \
       [timsk1] "i" ((uint16_t)&TIMSK1), \
-      [msk0] "M" ((uint8_t)(1<<OCIE0B)),\
+      [msk0] "M" ((uint8_t)(1<<OCIE0A)),\
       [msk1] "M" ((uint8_t)(1<<OCIE1A)) \
     : \
   ); \
@@ -193,9 +195,9 @@ void TIMER1_COMPA_vect_bottom()
 
 /* 14 cycles maximum latency */
 #define HAL_TEMP_TIMER_ISR() \
-extern "C" void TIMER0_COMPB_vect() __attribute__ ((signal, naked, used, externally_visible)); \
-extern "C" void TIMER0_COMPB_vect_bottom()  asm ("TIMER0_COMPB_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
-void TIMER0_COMPB_vect() { \
+extern "C" void TIMER0_COMPA_vect() __attribute__ ((signal, naked, used, externally_visible)); \
+extern "C" void TIMER0_COMPA_vect_bottom()  asm ("TIMER0_COMPA_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
+void TIMER0_COMPA_vect() { \
   __asm__ __volatile__ ( \
     A("push r16")                       /* 2 Save R16 */ \
     A("in r16, __SREG__")               /* 1 Get SREG */ \
@@ -223,7 +225,7 @@ void TIMER0_COMPB_vect() { \
     A("push r30")                       \
     A("push r31")                       \
     A("clr r1")                         /* C runtime expects this register to be 0 */ \
-    A("call TIMER0_COMPB_vect_bottom")  /* Call the bottom handler - No inlining allowed, otherwise registers used are not saved */   \
+    A("call TIMER0_COMPA_vect_bottom")  /* Call the bottom handler - No inlining allowed, otherwise registers used are not saved */   \
     A("pop r31")                        \
     A("pop r30")                        \
     A("pop r27")                        \
@@ -251,10 +253,10 @@ void TIMER0_COMPB_vect() { \
     A("reti")                           /* 4 Return from interrupt */ \
     :                                   \
     : [timsk0] "i"((uint16_t)&TIMSK0),  \
-      [msk0] "M" ((uint8_t)(1<<OCIE0B)) \
+      [msk0] "M" ((uint8_t)(1<<OCIE0A)) \
     : \
   ); \
 } \
-void TIMER0_COMPB_vect_bottom()
+void TIMER0_COMPA_vect_bottom()
 
 #endif // HAL_TEMP_TIMER_ISR

Marlin/src/HAL/AVR/u8g/LCD_defines.h

@@ -0,0 +1,29 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * AVR LCD-specific defines
+ */
+
+uint8_t u8g_com_HAL_AVR_sw_sp_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+#define U8G_COM_HAL_SW_SPI_FN u8g_com_HAL_AVR_sw_sp_fn

Marlin/src/HAL/AVR/u8g_com_HAL_AVR_sw_spi.cpp

@@ -62,10 +62,10 @@
 #include "../shared/Marduino.h"
 #include "../shared/Delay.h"
 
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
-uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
-volatile uint8_t *u8g_outData, *u8g_outClock;
+static uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
+static volatile uint8_t *u8g_outData, *u8g_outClock;
 
 static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin) {
   u8g_outData = portOutputRegister(digitalPinToPort(dataPin));
@@ -88,7 +88,7 @@ void u8g_spiSend_sw_AVR_mode_0(uint8_t val) {
   volatile uint8_t *outData = u8g_outData,
                    *outClock = u8g_outClock;
   U8G_ATOMIC_START();
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; ++i) {
     if (val & 0x80)
       *outData |= bitData;
     else
@@ -108,7 +108,7 @@ void u8g_spiSend_sw_AVR_mode_3(uint8_t val) {
   volatile uint8_t *outData = u8g_outData,
                    *outClock = u8g_outClock;
   U8G_ATOMIC_START();
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; ++i) {
     *outClock &= bitNotClock;
     if (val & 0x80)
       *outData |= bitData;
@@ -120,7 +120,6 @@ void u8g_spiSend_sw_AVR_mode_3(uint8_t val) {
   U8G_ATOMIC_END();
 }
 
-
 #if ENABLED(FYSETC_MINI_12864)
   #define SPISEND_SW_AVR u8g_spiSend_sw_AVR_mode_3
 #else

Marlin/src/HAL/AVR/watchdog.cpp

@@ -1,70 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef __AVR__
-
-#include "../../inc/MarlinConfig.h"
-
-#if ENABLED(USE_WATCHDOG)
-
-#include "watchdog.h"
-
-#include "../../MarlinCore.h"
-
-// Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
-void watchdog_init() {
-  #if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
-    #define WDTO_NS WDTO_8S
-  #else
-    #define WDTO_NS WDTO_4S
-  #endif
-  #if ENABLED(WATCHDOG_RESET_MANUAL)
-    // Enable the watchdog timer, but only for the interrupt.
-    // Take care, as this requires the correct order of operation, with interrupts disabled.
-    // See the datasheet of any AVR chip for details.
-    wdt_reset();
-    cli();
-    _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
-    _WD_CONTROL_REG = _BV(WDIE) | (WDTO_NS & 0x07) | ((WDTO_NS & 0x08) << 2); // WDTO_NS directly does not work. bit 0-2 are consecutive in the register but the highest value bit is at bit 5
-                                                                              // So worked for up to WDTO_2S
-    sei();
-    wdt_reset();
-  #else
-    wdt_enable(WDTO_NS); // The function handles the upper bit correct.
-  #endif
-  //delay(10000); // test it!
-}
-
-//===========================================================================
-//=================================== ISR ===================================
-//===========================================================================
-
-// Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
-#if ENABLED(WATCHDOG_RESET_MANUAL)
-  ISR(WDT_vect) {
-    sei();  // With the interrupt driven serial we need to allow interrupts.
-    SERIAL_ERROR_MSG(STR_WATCHDOG_FIRED);
-    minkill();  // interrupt-safe final kill and infinite loop
-  }
-#endif
-
-#endif // USE_WATCHDOG
-#endif // __AVR__

Marlin/src/HAL/DUE/DebugMonitor.cpp

@@ -1,342 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_SAM
-
-#include "../../core/macros.h"
-#include "../../core/serial.h"
-
-#include "../shared/backtrace/unwinder.h"
-#include "../shared/backtrace/unwmemaccess.h"
-
-#include <stdarg.h>
-
-// Debug monitor that dumps to the Programming port all status when
-// an exception or WDT timeout happens - And then resets the board
-
-// All the Monitor routines must run with interrupts disabled and
-// under an ISR execution context. That is why we cannot reuse the
-// Serial interrupt routines or any C runtime, as we don't know the
-// state we are when running them
-
-// A SW memory barrier, to ensure GCC does not overoptimize loops
-#define sw_barrier() __asm__ volatile("": : :"memory");
-
-// (re)initialize UART0 as a monitor output to 250000,n,8,1
-static void TXBegin() {
-
-  // Disable UART interrupt in NVIC
-  NVIC_DisableIRQ( UART_IRQn );
-
-  // We NEED memory barriers to ensure Interrupts are actually disabled!
-  // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
-  __DSB();
-  __ISB();
-
-  // Disable clock
-  pmc_disable_periph_clk( ID_UART );
-
-  // Configure PMC
-  pmc_enable_periph_clk( ID_UART );
-
-  // Disable PDC channel
-  UART->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
-
-  // Reset and disable receiver and transmitter
-  UART->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX | UART_CR_RXDIS | UART_CR_TXDIS;
-
-  // Configure mode: 8bit, No parity, 1 bit stop
-  UART->UART_MR = UART_MR_CHMODE_NORMAL | US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_NO;
-
-  // Configure baudrate (asynchronous, no oversampling) to BAUDRATE bauds
-  UART->UART_BRGR = (SystemCoreClock / (BAUDRATE << 4));
-
-  // Enable receiver and transmitter
-  UART->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
-}
-
-// Send character through UART with no interrupts
-static void TX(char c) {
-  while (!(UART->UART_SR & UART_SR_TXRDY)) { WDT_Restart(WDT); sw_barrier(); };
-  UART->UART_THR = c;
-}
-
-// Send String through UART
-static void TX(const char* s) {
-  while (*s) TX(*s++);
-}
-
-static void TXDigit(uint32_t d) {
-  if (d < 10) TX((char)(d+'0'));
-  else if (d < 16) TX((char)(d+'A'-10));
-  else TX('?');
-}
-
-// Send Hex number thru UART
-static void TXHex(uint32_t v) {
-  TX("0x");
-  for (uint8_t i = 0; i < 8; i++, v <<= 4)
-    TXDigit((v >> 28) & 0xF);
-}
-
-// Send Decimal number thru UART
-static void TXDec(uint32_t v) {
-  if (!v) {
-    TX('0');
-    return;
-  }
-
-  char nbrs[14];
-  char *p = &nbrs[0];
-  while (v != 0) {
-    *p++ = '0' + (v % 10);
-    v /= 10;
-  }
-  do {
-    p--;
-    TX(*p);
-  } while (p != &nbrs[0]);
-}
-
-// Dump a backtrace entry
-static bool UnwReportOut(void* ctx, const UnwReport* bte) {
-  int* p = (int*)ctx;
-
-  (*p)++;
-  TX('#'); TXDec(*p); TX(" : ");
-  TX(bte->name?bte->name:"unknown"); TX('@'); TXHex(bte->function);
-  TX('+'); TXDec(bte->address - bte->function);
-  TX(" PC:");TXHex(bte->address); TX('\n');
-  return true;
-}
-
-#ifdef UNW_DEBUG
-  void UnwPrintf(const char* format, ...) {
-    char dest[256];
-    va_list argptr;
-    va_start(argptr, format);
-    vsprintf(dest, format, argptr);
-    va_end(argptr);
-    TX(&dest[0]);
-  }
-#endif
-
-/* Table of function pointers for passing to the unwinder */
-static const UnwindCallbacks UnwCallbacks = {
-  UnwReportOut,
-  UnwReadW,
-  UnwReadH,
-  UnwReadB
-  #ifdef UNW_DEBUG
-   , UnwPrintf
-  #endif
-};
-
-/**
- * HardFaultHandler_C:
- * This is called from the HardFault_HandlerAsm with a pointer the Fault stack
- * as the parameter. We can then read the values from the stack and place them
- * into local variables for ease of reading.
- * We then read the various Fault Status and Address Registers to help decode
- * cause of the fault.
- * The function ends with a BKPT instruction to force control back into the debugger
- */
-extern "C"
-void HardFault_HandlerC(unsigned long *sp, unsigned long lr, unsigned long cause) {
-
-  static const char* causestr[] = {
-    "NMI","Hard","Mem","Bus","Usage","Debug","WDT","RSTC"
-  };
-
-  UnwindFrame btf;
-
-  // Dump report to the Programming port (interrupts are DISABLED)
-  TXBegin();
-  TX("\n\n## Software Fault detected ##\n");
-  TX("Cause: "); TX(causestr[cause]); TX('\n');
-
-  TX("R0   : "); TXHex(((unsigned long)sp[0])); TX('\n');
-  TX("R1   : "); TXHex(((unsigned long)sp[1])); TX('\n');
-  TX("R2   : "); TXHex(((unsigned long)sp[2])); TX('\n');
-  TX("R3   : "); TXHex(((unsigned long)sp[3])); TX('\n');
-  TX("R12  : "); TXHex(((unsigned long)sp[4])); TX('\n');
-  TX("LR   : "); TXHex(((unsigned long)sp[5])); TX('\n');
-  TX("PC   : "); TXHex(((unsigned long)sp[6])); TX('\n');
-  TX("PSR  : "); TXHex(((unsigned long)sp[7])); TX('\n');
-
-  // Configurable Fault Status Register
-  // Consists of MMSR, BFSR and UFSR
-  TX("CFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED28)))); TX('\n');
-
-  // Hard Fault Status Register
-  TX("HFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED2C)))); TX('\n');
-
-  // Debug Fault Status Register
-  TX("DFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED30)))); TX('\n');
-
-  // Auxiliary Fault Status Register
-  TX("AFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED3C)))); TX('\n');
-
-  // Read the Fault Address Registers. These may not contain valid values.
-  // Check BFARVALID/MMARVALID to see if they are valid values
-  // MemManage Fault Address Register
-  TX("MMAR : "); TXHex((*((volatile unsigned long *)(0xE000ED34)))); TX('\n');
-
-  // Bus Fault Address Register
-  TX("BFAR : "); TXHex((*((volatile unsigned long *)(0xE000ED38)))); TX('\n');
-
-  TX("ExcLR: "); TXHex(lr); TX('\n');
-  TX("ExcSP: "); TXHex((unsigned long)sp); TX('\n');
-
-  btf.sp = ((unsigned long)sp) + 8*4; // The original stack pointer
-  btf.fp = btf.sp;
-  btf.lr = ((unsigned long)sp[5]);
-  btf.pc = ((unsigned long)sp[6]) | 1; // Force Thumb, as CORTEX only support it
-
-  // Perform a backtrace
-  TX("\nBacktrace:\n\n");
-  int ctr = 0;
-  UnwindStart(&btf, &UnwCallbacks, &ctr);
-
-  // Disable all NVIC interrupts
-  NVIC->ICER[0] = 0xFFFFFFFF;
-  NVIC->ICER[1] = 0xFFFFFFFF;
-
-  // Relocate VTOR table to default position
-  SCB->VTOR = 0;
-
-  // Disable USB
-  otg_disable();
-
-  // Restart watchdog
-  WDT_Restart(WDT);
-
-  // Reset controller
-  NVIC_SystemReset();
-  for (;;) WDT_Restart(WDT);
-}
-
-__attribute__((naked)) void NMI_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#0")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void HardFault_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#1")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void MemManage_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#2")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void BusFault_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#3")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void UsageFault_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#4")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void DebugMon_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#5")
-    A("b HardFault_HandlerC")
-  );
-}
-
-/* This is NOT an exception, it is an interrupt handler - Nevertheless, the framing is the same */
-__attribute__((naked)) void WDT_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#6")
-    A("b HardFault_HandlerC")
-  );
-}
-
-__attribute__((naked)) void RSTC_Handler() {
-  __asm__ __volatile__ (
-    ".syntax unified" "\n\t"
-    A("tst lr, #4")
-    A("ite eq")
-    A("mrseq r0, msp")
-    A("mrsne r0, psp")
-    A("mov r1,lr")
-    A("mov r2,#7")
-    A("b HardFault_HandlerC")
-  );
-}
-
-#endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/HAL.cpp

@@ -1,7 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,7 +27,7 @@
 #ifdef ARDUINO_ARCH_SAM
 
 #include "../../inc/MarlinConfig.h"
-#include "HAL.h"
+#include "../../MarlinCore.h"
 
 #include <Wire.h>
 #include "usb/usb_task.h"
@@ -34,36 +36,33 @@
 // Public Variables
 // ------------------------
 
-uint16_t HAL_adc_result;
+uint16_t MarlinHAL::adc_result;
 
 // ------------------------
 // Public functions
 // ------------------------
 
-// HAL initialization task
-void HAL_init() {
-  // Initialize the USB stack
-  #if ENABLED(SDSUPPORT)
+#if ENABLED(POSTMORTEM_DEBUGGING)
+  extern void install_min_serial();
+#endif
+
+void MarlinHAL::init() {
+  #if HAS_MEDIA
     OUT_WRITE(SDSS, HIGH);  // Try to set SDSS inactive before any other SPI users start up
   #endif
-  usb_task_init();
+  usb_task_init();          // Initialize the USB stack
+  TERN_(POSTMORTEM_DEBUGGING, install_min_serial()); // Install the min serial handler
 }
 
-// HAL idle task
-void HAL_idletask() {
-  // Perform USB stack housekeeping
-  usb_task_idle();
+void MarlinHAL::init_board() {
+  #ifdef BOARD_INIT
+    BOARD_INIT();
+  #endif
 }
 
-// Disable interrupts
-void cli() { noInterrupts(); }
+void MarlinHAL::idletask() { usb_task_idle(); } // Perform USB stack housekeeping
 
-// Enable interrupts
-void sei() { interrupts(); }
-
-void HAL_clear_reset_source() { }
-
-uint8_t HAL_get_reset_source() {
+uint8_t MarlinHAL::get_reset_source() {
   switch ((RSTC->RSTC_SR >> 8) & 0x07) {
     case 0: return RST_POWER_ON;
     case 1: return RST_BACKUP;
@@ -74,11 +73,105 @@ uint8_t HAL_get_reset_source() {
   }
 }
 
-void _delay_ms(const int delay_ms) {
-  // Todo: port for Due?
-  delay(delay_ms);
+void MarlinHAL::reboot() { rstc_start_software_reset(RSTC); }
+
+// ------------------------
+// Watchdog Timer
+// ------------------------
+
+#if ENABLED(USE_WATCHDOG)
+
+  // Initialize watchdog - On SAM3X, Watchdog was already configured
+  //  and enabled or disabled at startup, so no need to reconfigure it
+  //  here.
+  void MarlinHAL::watchdog_init() { WDT_Restart(WDT); } // Reset watchdog to start clean
+
+  // Reset watchdog. MUST be called at least every 4 seconds after the
+  // first watchdog_init or AVR will go into emergency procedures.
+  void MarlinHAL::watchdog_refresh() { watchdogReset(); }
+
+#endif
+
+// Override Arduino runtime to either config or disable the watchdog
+//
+// We need to configure the watchdog as soon as possible in the boot
+// process, because watchdog initialization at hardware reset on SAM3X8E
+// is unreliable, and there is risk of unintended resets if we delay
+// that initialization to a later time.
+void watchdogSetup() {
+
+  #if ENABLED(USE_WATCHDOG)
+
+    // 4 seconds timeout
+    uint32_t timeout = TERN(WATCHDOG_DURATION_8S, 8000, 4000);
+
+    // Calculate timeout value in WDT counter ticks: This assumes
+    // the slow clock is running at 32.768 kHz watchdog
+    // frequency is therefore 32768 / 128 = 256 Hz
+    timeout = (timeout << 8) / 1000;
+    if (timeout == 0)
+      timeout = 1;
+    else if (timeout > 0xFFF)
+      timeout = 0xFFF;
+
+    // We want to enable the watchdog with the specified timeout
+    uint32_t value =
+      WDT_MR_WDV(timeout) |               // With the specified timeout
+      WDT_MR_WDD(timeout) |               // and no invalid write window
+    #if !(SAMV70 || SAMV71 || SAME70 || SAMS70)
+      WDT_MR_WDRPROC   |                  // WDT fault resets processor only - We want
+                                          // to keep PIO controller state
+    #endif
+      WDT_MR_WDDBGHLT  |                  // WDT stops in debug state.
+      WDT_MR_WDIDLEHLT;                   // WDT stops in idle state.
+
+    #if ENABLED(WATCHDOG_RESET_MANUAL)
+      // We enable the watchdog timer, but only for the interrupt.
+
+      // Configure WDT to only trigger an interrupt
+      value |= WDT_MR_WDFIEN;             // Enable WDT fault interrupt.
+
+      // Disable WDT interrupt (just in case, to avoid triggering it!)
+      NVIC_DisableIRQ(WDT_IRQn);
+
+      // We NEED memory barriers to ensure Interrupts are actually disabled!
+      // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
+      __DSB();
+      __ISB();
+
+      // Initialize WDT with the given parameters
+      WDT_Enable(WDT, value);
+
+      // Configure and enable WDT interrupt.
+      NVIC_ClearPendingIRQ(WDT_IRQn);
+      NVIC_SetPriority(WDT_IRQn, 0); // Use highest priority, so we detect all kinds of lockups
+      NVIC_EnableIRQ(WDT_IRQn);
+
+    #else
+
+      // a WDT fault triggers a reset
+      value |= WDT_MR_WDRSTEN;
+
+      // Initialize WDT with the given parameters
+      WDT_Enable(WDT, value);
+
+    #endif
+
+    // Reset the watchdog
+    WDT_Restart(WDT);
+
+  #else
+
+    // Make sure to completely disable the Watchdog
+    WDT_Disable(WDT);
+
+  #endif
 }
 
+// ------------------------
+// Free Memory Accessor
+// ------------------------
+
 extern "C" {
   extern unsigned int _ebss; // end of bss section
 }
@@ -90,16 +183,21 @@ int freeMemory() {
 }
 
 // ------------------------
-// ADC
+// Serial Ports
 // ------------------------
 
-void HAL_adc_start_conversion(const uint8_t ch) {
-  HAL_adc_result = analogRead(ch);
-}
-
-uint16_t HAL_adc_get_result() {
-  // nop
-  return HAL_adc_result;
-}
+// Forward the default serial ports
+#if USING_HW_SERIAL0
+  DefaultSerial1 MSerial0(false, Serial);
+#endif
+#if USING_HW_SERIAL1
+  DefaultSerial2 MSerial1(false, Serial1);
+#endif
+#if USING_HW_SERIAL2
+  DefaultSerial3 MSerial2(false, Serial2);
+#endif
+#if USING_HW_SERIAL3
+  DefaultSerial4 MSerial3(false, Serial3);
+#endif
 
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/HAL.h

@@ -1,9 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
- *
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,103 +32,106 @@
 #include "../shared/math_32bit.h"
 #include "../shared/HAL_SPI.h"
 #include "fastio.h"
-#include "watchdog.h"
 
 #include <stdint.h>
 
-#define _MSERIAL(X) Serial##X
-#define MSERIAL(X) _MSERIAL(X)
-#define Serial0 Serial
+#include "../../core/serial_hook.h"
+
+// ------------------------
+// Serial ports
+// ------------------------
+
+typedef ForwardSerial1Class< decltype(Serial) > DefaultSerial1;
+typedef ForwardSerial1Class< decltype(Serial1) > DefaultSerial2;
+typedef ForwardSerial1Class< decltype(Serial2) > DefaultSerial3;
+typedef ForwardSerial1Class< decltype(Serial3) > DefaultSerial4;
+extern DefaultSerial1 MSerial0;
+extern DefaultSerial2 MSerial1;
+extern DefaultSerial3 MSerial2;
+extern DefaultSerial4 MSerial3;
+
+#define _MSERIAL(X) MSerial##X
+#define MSERIAL(X) _MSERIAL(X)
 
-// Define MYSERIAL0/1 before MarlinSerial includes!
 #if SERIAL_PORT == -1 || ENABLED(EMERGENCY_PARSER)
-  #define MYSERIAL0 customizedSerial1
+  #define MYSERIAL1 customizedSerial1
 #elif WITHIN(SERIAL_PORT, 0, 3)
-  #define MYSERIAL0 MSERIAL(SERIAL_PORT)
+  #define MYSERIAL1 MSERIAL(SERIAL_PORT)
 #else
-  #error "The required SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #error "The required SERIAL_PORT must be from 0 to 3, or -1 for USB Serial."
 #endif
 
 #ifdef SERIAL_PORT_2
   #if SERIAL_PORT_2 == -1 || ENABLED(EMERGENCY_PARSER)
-    #define MYSERIAL1 customizedSerial2
+    #define MYSERIAL2 customizedSerial2
   #elif WITHIN(SERIAL_PORT_2, 0, 3)
-    #define MYSERIAL1 MSERIAL(SERIAL_PORT_2)
+    #define MYSERIAL2 MSERIAL(SERIAL_PORT_2)
   #else
-    #error "SERIAL_PORT_2 must be from -1 to 3. Please update your configuration."
+    #error "SERIAL_PORT_2 must be from 0 to 3, or -1 for USB Serial."
+  #endif
+#endif
+
+#ifdef SERIAL_PORT_3
+  #if SERIAL_PORT_3 == -1 || ENABLED(EMERGENCY_PARSER)
+    #define MYSERIAL3 customizedSerial3
+  #elif WITHIN(SERIAL_PORT_3, 0, 3)
+    #define MYSERIAL3 MSERIAL(SERIAL_PORT_3)
+  #else
+    #error "SERIAL_PORT_3 must be from 0 to 3, or -1 for USB Serial."
+  #endif
+#endif
+
+#ifdef MMU2_SERIAL_PORT
+  #if WITHIN(MMU2_SERIAL_PORT, 0, 3)
+    #define MMU2_SERIAL MSERIAL(MMU2_SERIAL_PORT)
+  #else
+    #error "MMU2_SERIAL_PORT must be from 0 to 3."
   #endif
 #endif
 
 #ifdef LCD_SERIAL_PORT
-  #if LCD_SERIAL_PORT == -1
-    #define LCD_SERIAL lcdSerial
-  #elif WITHIN(LCD_SERIAL_PORT, 0, 3)
+  #if WITHIN(LCD_SERIAL_PORT, 0, 3)
     #define LCD_SERIAL MSERIAL(LCD_SERIAL_PORT)
   #else
-    #error "LCD_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+    #error "LCD_SERIAL_PORT must be from 0 to 3."
   #endif
 #endif
 
 #include "MarlinSerial.h"
 #include "MarlinSerialUSB.h"
 
-// On AVR this is in math.h?
-#define square(x) ((x)*(x))
-
-#ifndef strncpy_P
-  #define strncpy_P(dest, src, num) strncpy((dest), (src), (num))
-#endif
-
-// Fix bug in pgm_read_ptr
-#undef pgm_read_ptr
-#define pgm_read_ptr(addr) (*((void**)(addr)))
-#undef pgm_read_word
-#define pgm_read_word(addr) (*((uint16_t*)(addr)))
+// ------------------------
+// Types
+// ------------------------
 
 typedef int8_t pin_t;
 
-#define SHARED_SERVOS HAS_SERVOS
-#define HAL_SERVO_LIB Servo
+#define SHARED_SERVOS HAS_SERVOS  // Use shared/servos.cpp
+
+class Servo;
+typedef Servo hal_servo_t;
 
 //
 // Interrupts
 //
-#define CRITICAL_SECTION_START()  uint32_t primask = __get_PRIMASK(); __disable_irq()
-#define CRITICAL_SECTION_END()    if (!primask) __enable_irq()
-#define ISRS_ENABLED() (!__get_PRIMASK())
-#define ENABLE_ISRS()  __enable_irq()
-#define DISABLE_ISRS() __disable_irq()
+#define sei() interrupts()
+#define cli() noInterrupts()
 
-void cli();                     // Disable interrupts
-void sei();                     // Enable interrupts
-
-void HAL_clear_reset_source();  // clear reset reason
-uint8_t HAL_get_reset_source(); // get reset reason
+#define CRITICAL_SECTION_START()  const bool _irqon = hal.isr_state(); hal.isr_off()
+#define CRITICAL_SECTION_END()    if (_irqon) hal.isr_on()
 
 //
 // ADC
 //
-extern uint16_t HAL_adc_result;     // result of last ADC conversion
+#define HAL_ADC_VREF_MV   3300
+#define HAL_ADC_RESOLUTION  10
 
 #ifndef analogInputToDigitalPin
-  #define analogInputToDigitalPin(p) ((p < 12u) ? (p) + 54u : -1)
+  #define analogInputToDigitalPin(p) ((p < 12U) ? (p) + 54U : -1)
 #endif
 
-#define HAL_ANALOG_SELECT(ch)
-
-inline void HAL_adc_init() {}//todo
-
-#define HAL_ADC_VREF         3.3
-#define HAL_ADC_RESOLUTION  10
-#define HAL_START_ADC(ch)   HAL_adc_start_conversion(ch)
-#define HAL_READ_ADC()      HAL_adc_result
-#define HAL_ADC_READY()     true
-
-void HAL_adc_start_conversion(const uint8_t ch);
-uint16_t HAL_adc_get_result();
-
 //
-// Pin Map
+// Pin Mapping for M42, M43, M226
 //
 #define GET_PIN_MAP_PIN(index) index
 #define GET_PIN_MAP_INDEX(pin) pin
@@ -137,23 +140,18 @@ uint16_t HAL_adc_get_result();
 //
 // Tone
 //
-void toneInit();
 void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration=0);
 void noTone(const pin_t _pin);
 
-// Enable hooks into idle and setup for HAL
-#define HAL_IDLETASK 1
-void HAL_idletask();
-void HAL_init();
-
-//
-// Utility functions
-//
-void _delay_ms(const int delay);
+// ------------------------
+// Class Utilities
+// ------------------------
 
 #pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory();
+#if GCC_VERSION <= 50000
+  #pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
 #pragma GCC diagnostic pop
 
 #ifdef __cplusplus
@@ -163,3 +161,73 @@ char *dtostrf(double __val, signed char __width, unsigned char __prec, char *__s
 #ifdef __cplusplus
   }
 #endif
+
+// Return free RAM between end of heap (or end bss) and whatever is current
+int freeMemory();
+
+// ------------------------
+// MarlinHAL Class
+// ------------------------
+
+class MarlinHAL {
+public:
+
+  // Earliest possible init, before setup()
+  MarlinHAL() {}
+
+  // Watchdog
+  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
+  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
+
+  static void init();          // Called early in setup()
+  static void init_board();    // Called less early in setup()
+  static void reboot();        // Restart the firmware
+
+  // Interrupts
+  static bool isr_state() { return !__get_PRIMASK(); }
+  static void isr_on()  { __enable_irq(); }
+  static void isr_off() { __disable_irq(); }
+
+  static void delay_ms(const int ms) { delay(ms); }
+
+  // Tasks, called from idle()
+  static void idletask();
+
+  // Reset
+  static uint8_t get_reset_source();
+  static void clear_reset_source() {}
+
+  // Free SRAM
+  static int freeMemory() { return ::freeMemory(); }
+
+  //
+  // ADC Methods
+  //
+
+  static uint16_t adc_result;
+
+  // Called by Temperature::init once at startup
+  static void adc_init() {}
+
+  // Called by Temperature::init for each sensor at startup
+  static void adc_enable(const uint8_t /*ch*/) {}
+
+  // Begin ADC sampling on the given channel. Called from Temperature::isr!
+  static void adc_start(const uint8_t ch) { adc_result = analogRead(ch); }
+
+  // Is the ADC ready for reading?
+  static bool adc_ready() { return true; }
+
+  // The current value of the ADC register
+  static uint16_t adc_value() { return adc_result; }
+
+  /**
+   * Set the PWM duty cycle for the pin to the given value.
+   * No inverting the duty cycle in this HAL.
+   * No changing the maximum size of the provided value to enable finer PWM duty control in this HAL.
+   */
+  static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t=255, const bool=false) {
+    analogWrite(pin, v);
+  }
+
+};

Marlin/src/HAL/DUE/HAL_SPI.cpp

@@ -31,8 +31,6 @@
 
 /**
  * HAL for Arduino Due and compatible (SAM3X8E)
- *
- * For ARDUINO_ARCH_SAM
  */
 
 #ifdef ARDUINO_ARCH_SAM
@@ -44,7 +42,7 @@
 // Public functions
 // ------------------------
 
-#if EITHER(DUE_SOFTWARE_SPI, FORCE_SOFT_SPI)
+#if ANY(SOFTWARE_SPI, FORCE_SOFT_SPI)
 
   // ------------------------
   // Software SPI
@@ -56,8 +54,8 @@
   #pragma GCC optimize (3)
 
   typedef uint8_t (*pfnSpiTransfer)(uint8_t b);
-  typedef void    (*pfnSpiRxBlock)(uint8_t* buf, uint32_t nbyte);
-  typedef void    (*pfnSpiTxBlock)(const uint8_t* buf, uint32_t nbyte);
+  typedef void    (*pfnSpiRxBlock)(uint8_t *buf, uint32_t nbyte);
+  typedef void    (*pfnSpiTxBlock)(const uint8_t *buf, uint32_t nbyte);
 
   /* ---------------- Macros to be able to access definitions from asm */
   #define _PORT(IO) DIO ##  IO ## _WPORT
@@ -69,10 +67,10 @@
 
   // run at ~8 .. ~10Mhz - Tx version (Rx data discarded)
   static uint8_t spiTransferTx0(uint8_t bout) { // using Mode 0
-    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(MOSI_PIN)) + 0x30;  /* SODR of port */
-    uint32_t MOSI_MASK = PIN_MASK(MOSI_PIN);
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
+    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(SD_MOSI_PIN)) + 0x30;  /* SODR of port */
+    uint32_t MOSI_MASK = PIN_MASK(SD_MOSI_PIN);
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
     uint32_t idx = 0;
 
     /* Negate bout, as the assembler requires a negated value */
@@ -154,9 +152,9 @@
   static uint8_t spiTransferRx0(uint8_t) { // using Mode 0
     uint32_t bin = 0;
     uint32_t work = 0;
-    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(MISO_PIN))+0x3C, PIN_SHIFT(MISO_PIN));  /* PDSR of port in bitband area */
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
+    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(SD_MISO_PIN))+0x3C, PIN_SHIFT(SD_MISO_PIN));  /* PDSR of port in bitband area */
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
 
     /* The software SPI routine */
     __asm__ __volatile__(
@@ -225,36 +223,36 @@
   static uint8_t spiTransfer1(uint8_t b) { // using Mode 0
     int bits = 8;
     do {
-      WRITE(MOSI_PIN, b & 0x80);
+      WRITE(SD_MOSI_PIN, b & 0x80);
       b <<= 1;        // little setup time
 
-      WRITE(SCK_PIN, HIGH);
+      WRITE(SD_SCK_PIN, HIGH);
       DELAY_NS(125);  // 10 cycles @ 84mhz
 
-      b |= (READ(MISO_PIN) != 0);
+      b |= (READ(SD_MISO_PIN) != 0);
 
-      WRITE(SCK_PIN, LOW);
+      WRITE(SD_SCK_PIN, LOW);
       DELAY_NS(125);  // 10 cycles @ 84mhz
     } while (--bits);
     return b;
   }
 
   // all the others
-  static uint32_t spiDelayCyclesX4 = (F_CPU) / 1000000; // 4µs => 125khz
+  static uint16_t spiDelayNS = 4000; // 4000ns => 125khz
 
   static uint8_t spiTransferX(uint8_t b) { // using Mode 0
     int bits = 8;
     do {
-      WRITE(MOSI_PIN, b & 0x80);
+      WRITE(SD_MOSI_PIN, b & 0x80);
       b <<= 1; // little setup time
 
-      WRITE(SCK_PIN, HIGH);
-      __delay_4cycles(spiDelayCyclesX4);
+      WRITE(SD_SCK_PIN, HIGH);
+      DELAY_NS_VAR(spiDelayNS);
 
-      b |= (READ(MISO_PIN) != 0);
+      b |= (READ(SD_MISO_PIN) != 0);
 
-      WRITE(SCK_PIN, LOW);
-      __delay_4cycles(spiDelayCyclesX4);
+      WRITE(SD_SCK_PIN, LOW);
+      DELAY_NS_VAR(spiDelayNS);
     } while (--bits);
     return b;
   }
@@ -270,11 +268,11 @@
   static pfnSpiTransfer spiTransferTx = (pfnSpiTransfer)spiTransferX;
 
   // Block transfers run at ~8 .. ~10Mhz - Tx version (Rx data discarded)
-  static void spiTxBlock0(const uint8_t* ptr, uint32_t todo) {
-    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(MOSI_PIN)) + 0x30;  /* SODR of port */
-    uint32_t MOSI_MASK = PIN_MASK(MOSI_PIN);
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
+  static void spiTxBlock0(const uint8_t *ptr, uint32_t todo) {
+    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(SD_MOSI_PIN)) + 0x30;  /* SODR of port */
+    uint32_t MOSI_MASK = PIN_MASK(SD_MOSI_PIN);
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
     uint32_t work = 0;
     uint32_t txval = 0;
 
@@ -349,12 +347,12 @@
     );
   }
 
-  static void spiRxBlock0(uint8_t* ptr, uint32_t todo) {
+  static void spiRxBlock0(uint8_t *ptr, uint32_t todo) {
     uint32_t bin = 0;
     uint32_t work = 0;
-    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(MISO_PIN))+0x3C, PIN_SHIFT(MISO_PIN));  /* PDSR of port in bitband area */
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
+    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(SD_MISO_PIN))+0x3C, PIN_SHIFT(SD_MISO_PIN));  /* PDSR of port in bitband area */
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
 
     /* The software SPI routine */
     __asm__ __volatile__(
@@ -425,48 +423,48 @@
     );
   }
 
-  static void spiTxBlockX(const uint8_t* buf, uint32_t todo) {
+  static void spiTxBlockX(const uint8_t *buf, uint32_t todo) {
     do {
       (void)spiTransferTx(*buf++);
     } while (--todo);
   }
 
-  static void spiRxBlockX(uint8_t* buf, uint32_t todo) {
+  static void spiRxBlockX(uint8_t *buf, uint32_t todo) {
     do {
       *buf++ = spiTransferRx(0xFF);
     } while (--todo);
   }
 
-  // Pointers to generic functions for block tranfers
+  // Pointers to generic functions for block transfers
   static pfnSpiTxBlock spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;
   static pfnSpiRxBlock spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;
 
   #if MB(ALLIGATOR)
-    #define _SS_WRITE(S) WRITE(SS_PIN, S)
+    #define _SS_WRITE(S) WRITE(SD_SS_PIN, S)
   #else
     #define _SS_WRITE(S) NOOP
   #endif
 
   void spiBegin() {
-    SET_OUTPUT(SS_PIN);
+    SET_OUTPUT(SD_SS_PIN);
     _SS_WRITE(HIGH);
-    SET_OUTPUT(SCK_PIN);
-    SET_INPUT(MISO_PIN);
-    SET_OUTPUT(MOSI_PIN);
+    SET_OUTPUT(SD_SCK_PIN);
+    SET_INPUT(SD_MISO_PIN);
+    SET_OUTPUT(SD_MOSI_PIN);
   }
 
   uint8_t spiRec() {
     _SS_WRITE(LOW);
-    WRITE(MOSI_PIN, HIGH); // Output 1s 1
+    WRITE(SD_MOSI_PIN, HIGH); // Output 1s 1
     uint8_t b = spiTransferRx(0xFF);
     _SS_WRITE(HIGH);
     return b;
   }
 
-  void spiRead(uint8_t* buf, uint16_t nbyte) {
+  void spiRead(uint8_t *buf, uint16_t nbyte) {
     if (nbyte) {
       _SS_WRITE(LOW);
-      WRITE(MOSI_PIN, HIGH); // Output 1s 1
+      WRITE(SD_MOSI_PIN, HIGH); // Output 1s 1
       spiRxBlock(buf, nbyte);
       _SS_WRITE(HIGH);
     }
@@ -478,7 +476,7 @@
     _SS_WRITE(HIGH);
   }
 
-  void spiSendBlock(uint8_t token, const uint8_t* buf) {
+  void spiSendBlock(uint8_t token, const uint8_t *buf) {
     _SS_WRITE(LOW);
     (void)spiTransferTx(token);
     spiTxBlock(buf, 512);
@@ -510,7 +508,7 @@
         spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;
         break;
       default:
-        spiDelayCyclesX4 = ((F_CPU) / 1000000) >> (6 - spiRate);
+        spiDelayNS = 4000 >> (6 - spiRate); // spiRate of 2 gives the maximum error with current CPU
         spiTransferTx = (pfnSpiTransfer)spiTransferX;
         spiTransferRx = (pfnSpiTransfer)spiTransferX;
         spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;
@@ -519,8 +517,8 @@
     }
 
     _SS_WRITE(HIGH);
-    WRITE(MOSI_PIN, HIGH);
-    WRITE(SCK_PIN, LOW);
+    WRITE(SD_MOSI_PIN, HIGH);
+    WRITE(SD_SCK_PIN, LOW);
   }
 
   /** Begin SPI transaction, set clock, bit order, data mode */
@@ -575,38 +573,34 @@
 
       // Configure SPI pins
       PIO_Configure(
-         g_APinDescription[SCK_PIN].pPort,
-         g_APinDescription[SCK_PIN].ulPinType,
-         g_APinDescription[SCK_PIN].ulPin,
-         g_APinDescription[SCK_PIN].ulPinConfiguration);
+         g_APinDescription[SD_SCK_PIN].pPort,
+         g_APinDescription[SD_SCK_PIN].ulPinType,
+         g_APinDescription[SD_SCK_PIN].ulPin,
+         g_APinDescription[SD_SCK_PIN].ulPinConfiguration);
       PIO_Configure(
-         g_APinDescription[MOSI_PIN].pPort,
-         g_APinDescription[MOSI_PIN].ulPinType,
-         g_APinDescription[MOSI_PIN].ulPin,
-         g_APinDescription[MOSI_PIN].ulPinConfiguration);
+         g_APinDescription[SD_MOSI_PIN].pPort,
+         g_APinDescription[SD_MOSI_PIN].ulPinType,
+         g_APinDescription[SD_MOSI_PIN].ulPin,
+         g_APinDescription[SD_MOSI_PIN].ulPinConfiguration);
       PIO_Configure(
-         g_APinDescription[MISO_PIN].pPort,
-         g_APinDescription[MISO_PIN].ulPinType,
-         g_APinDescription[MISO_PIN].ulPin,
-         g_APinDescription[MISO_PIN].ulPinConfiguration);
+         g_APinDescription[SD_MISO_PIN].pPort,
+         g_APinDescription[SD_MISO_PIN].ulPinType,
+         g_APinDescription[SD_MISO_PIN].ulPin,
+         g_APinDescription[SD_MISO_PIN].ulPinConfiguration);
 
       // set master mode, peripheral select, fault detection
       SPI_Configure(SPI0, ID_SPI0, SPI_MR_MSTR | SPI_MR_MODFDIS | SPI_MR_PS);
       SPI_Enable(SPI0);
 
-      SET_OUTPUT(DAC0_SYNC);
+      SET_OUTPUT(DAC0_SYNC_PIN);
       #if HAS_MULTI_EXTRUDER
-        SET_OUTPUT(DAC1_SYNC);
-        WRITE(DAC1_SYNC, HIGH);
+        OUT_WRITE(DAC1_SYNC_PIN, HIGH);
       #endif
-      SET_OUTPUT(SPI_EEPROM1_CS);
-      SET_OUTPUT(SPI_EEPROM2_CS);
-      SET_OUTPUT(SPI_FLASH_CS);
-      WRITE(DAC0_SYNC, HIGH);
-      WRITE(SPI_EEPROM1_CS, HIGH);
-      WRITE(SPI_EEPROM2_CS, HIGH);
-      WRITE(SPI_FLASH_CS, HIGH);
-      WRITE(SS_PIN, HIGH);
+      WRITE(DAC0_SYNC_PIN, HIGH);
+      OUT_WRITE(SPI_EEPROM1_CS_PIN, HIGH);
+      OUT_WRITE(SPI_EEPROM2_CS_PIN, HIGH);
+      OUT_WRITE(SPI_FLASH_CS_PIN, HIGH);
+      WRITE(SD_SS_PIN, HIGH);
 
       OUT_WRITE(SDSS, LOW);
 
@@ -645,7 +639,7 @@
     }
 
     // Read from SPI into buffer
-    void spiRead(uint8_t* buf, uint16_t nbyte) {
+    void spiRead(uint8_t *buf, uint16_t nbyte) {
       if (!nbyte) return;
       --nbyte;
       for (int i = 0; i < nbyte; i++) {
@@ -668,7 +662,7 @@
       //DELAY_US(1U);
     }
 
-    void spiSend(const uint8_t* buf, size_t nbyte) {
+    void spiSend(const uint8_t *buf, size_t nbyte) {
       if (!nbyte) return;
       --nbyte;
       for (size_t i = 0; i < nbyte; i++) {
@@ -689,7 +683,7 @@
       FLUSH_RX();
     }
 
-    void spiSend(uint32_t chan, const uint8_t* buf, size_t nbyte) {
+    void spiSend(uint32_t chan, const uint8_t *buf, size_t nbyte) {
       if (!nbyte) return;
       --nbyte;
       for (size_t i = 0; i < nbyte; i++) {
@@ -702,7 +696,7 @@
     }
 
     // Write from buffer to SPI
-    void spiSendBlock(uint8_t token, const uint8_t* buf) {
+    void spiSendBlock(uint8_t token, const uint8_t *buf) {
       SPI0->SPI_TDR = (uint32_t)token | SPI_PCS(SPI_CHAN);
       WHILE_TX(0);
       //WHILE_RX(0);
@@ -801,19 +795,19 @@
 
     uint8_t spiRec() { return (uint8_t)spiTransfer(0xFF); }
 
-    void spiRead(uint8_t* buf, uint16_t nbyte) {
+    void spiRead(uint8_t *buf, uint16_t nbyte) {
       for (int i = 0; i < nbyte; i++)
         buf[i] = spiTransfer(0xFF);
     }
 
     void spiSend(uint8_t data) { spiTransfer(data); }
 
-    void spiSend(const uint8_t* buf, size_t nbyte) {
+    void spiSend(const uint8_t *buf, size_t nbyte) {
       for (uint16_t i = 0; i < nbyte; i++)
         spiTransfer(buf[i]);
     }
 
-    void spiSendBlock(uint8_t token, const uint8_t* buf) {
+    void spiSendBlock(uint8_t token, const uint8_t *buf) {
       spiTransfer(token);
       for (uint16_t i = 0; i < 512; i++)
         spiTransfer(buf[i]);

Marlin/src/HAL/DUE/InterruptVectors.cpp

@@ -41,7 +41,7 @@
    practice, we need alignment to 256 bytes to make this work in all
    cases */
 __attribute__ ((aligned(256)))
-static DeviceVectors ram_tab = { nullptr };
+static DeviceVectors ram_tab[61] = { nullptr };
 
 /**
  * This function checks if the exception/interrupt table is already in SRAM or not.

Marlin/src/HAL/DUE/MarlinSPI.h

@@ -0,0 +1,26 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include <SPI.h>
+
+using MarlinSPI = SPIClass;

Marlin/src/HAL/DUE/MarlinSerial.cpp

@@ -382,7 +382,7 @@ void MarlinSerial<Cfg>::flush() {
 }
 
 template<typename Cfg>
-void MarlinSerial<Cfg>::write(const uint8_t c) {
+size_t MarlinSerial<Cfg>::write(const uint8_t c) {
   _written = true;
 
   if (Cfg::TX_SIZE == 0) {
@@ -400,13 +400,13 @@ void MarlinSerial<Cfg>::write(const uint8_t c) {
     // XOFF char at the RX isr, but it is properly handled there
     if (!(HWUART->UART_IMR & UART_IMR_TXRDY) && (HWUART->UART_SR & UART_SR_TXRDY)) {
       HWUART->UART_THR = c;
-      return;
+      return 1;
     }
 
     const uint8_t i = (tx_buffer.head + 1) & (Cfg::TX_SIZE - 1);
 
     // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!ISRS_ENABLED()) {
+    if (!hal.isr_state()) {
 
       // Make room by polling if it is possible to transmit, and do so!
       while (i == tx_buffer.tail) {
@@ -428,6 +428,7 @@ void MarlinSerial<Cfg>::write(const uint8_t c) {
     // Enable TX isr - Non atomic, but it will eventually enable TX isr
     HWUART->UART_IER = UART_IER_TXRDY;
   }
+  return 1;
 }
 
 template<typename Cfg>
@@ -453,7 +454,7 @@ void MarlinSerial<Cfg>::flushTX() {
     if (!_written) return;
 
     // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!ISRS_ENABLED()) {
+    if (!hal.isr_state()) {
 
       // Wait until everything was transmitted - We must do polling, as interrupts are disabled
       while (tx_buffer.head != tx_buffer.tail || !(HWUART->UART_SR & UART_SR_TXEMPTY)) {
@@ -473,169 +474,20 @@ void MarlinSerial<Cfg>::flushTX() {
   }
 }
 
-/**
- * Imports from print.h
- */
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(char c, int base) {
-  print((long)c, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned char b, int base) {
-  print((unsigned long)b, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(int n, int base) {
-  print((long)n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned int n, int base) {
-  print((unsigned long)n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(long n, int base) {
-  if (base == 0) write(n);
-  else if (base == 10) {
-    if (n < 0) { print('-'); n = -n; }
-    printNumber(n, 10);
-  }
-  else
-    printNumber(n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(unsigned long n, int base) {
-  if (base == 0) write(n);
-  else printNumber(n, base);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::print(double n, int digits) {
-  printFloat(n, digits);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println() {
-  print('\r');
-  print('\n');
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(const String& s) {
-  print(s);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(const char c[]) {
-  print(c);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(char c, int base) {
-  print(c, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned char b, int base) {
-  print(b, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(int n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned int n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(long n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(unsigned long n, int base) {
-  print(n, base);
-  println();
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::println(double n, int digits) {
-  print(n, digits);
-  println();
-}
-
-// Private Methods
-template<typename Cfg>
-void MarlinSerial<Cfg>::printNumber(unsigned long n, uint8_t base) {
-  if (n) {
-    unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
-    int8_t i = 0;
-    while (n) {
-      buf[i++] = n % base;
-      n /= base;
-    }
-    while (i--)
-      print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
-  }
-  else
-    print('0');
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::printFloat(double number, uint8_t digits) {
-  // Handle negative numbers
-  if (number < 0.0) {
-    print('-');
-    number = -number;
-  }
-
-  // Round correctly so that print(1.999, 2) prints as "2.00"
-  double rounding = 0.5;
-  LOOP_L_N(i, digits) rounding *= 0.1;
-  number += rounding;
-
-  // Extract the integer part of the number and print it
-  unsigned long int_part = (unsigned long)number;
-  double remainder = number - (double)int_part;
-  print(int_part);
-
-  // Print the decimal point, but only if there are digits beyond
-  if (digits) {
-    print('.');
-    // Extract digits from the remainder one at a time
-    while (digits--) {
-      remainder *= 10.0;
-      int toPrint = int(remainder);
-      print(toPrint);
-      remainder -= toPrint;
-    }
-  }
-}
-
 // If not using the USB port as serial port
-#if SERIAL_PORT >= 0
-  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;      // Define
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;   // Instantiate
+#if defined(SERIAL_PORT) && SERIAL_PORT >= 0
+  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT> >;
+  MSerialT1 customizedSerial1(MarlinSerialCfg<SERIAL_PORT>::EMERGENCYPARSER);
 #endif
 
 #if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
-  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;    // Define
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2; // Instantiate
+  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> >;
+  MSerialT2 customizedSerial2(MarlinSerialCfg<SERIAL_PORT_2>::EMERGENCYPARSER);
+#endif
+
+#if defined(SERIAL_PORT_3) && SERIAL_PORT_3 >= 0
+  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> >;
+  MSerialT3 customizedSerial3(MarlinSerialCfg<SERIAL_PORT_3>::EMERGENCYPARSER);
 #endif
 
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/MarlinSerial.h

@@ -30,11 +30,8 @@
 #include <WString.h>
 
 #include "../../inc/MarlinConfigPre.h"
-
-#define DEC 10
-#define HEX 16
-#define OCT 8
-#define BIN 2
+#include "../../core/types.h"
+#include "../../core/serial_hook.h"
 
 // Define constants and variables for buffering incoming serial data.  We're
 // using a ring buffer (I think), in which rx_buffer_head is the index of the
@@ -56,10 +53,6 @@
 //  #error "TX_BUFFER_SIZE must be 0, a power of 2 greater than 1, and no greater than 256."
 //#endif
 
-// Templated type selector
-template<bool b, typename T, typename F> struct TypeSelector { typedef T type;} ;
-template<typename T, typename F> struct TypeSelector<false, T, F> { typedef F type; };
-
 // Templated structure wrapper
 template<typename S, unsigned int addr> struct StructWrapper {
   constexpr StructWrapper(int) {}
@@ -80,7 +73,7 @@ protected:
   static constexpr int HWUART_IRQ_ID = IRQ_IDS[Cfg::PORT];
 
   // Base size of type on buffer size
-  typedef typename TypeSelector<(Cfg::RX_SIZE>256), uint16_t, uint8_t>::type ring_buffer_pos_t;
+  typedef uvalue_t(Cfg::RX_SIZE - 1) ring_buffer_pos_t;
 
   struct ring_buffer_r {
     volatile ring_buffer_pos_t head, tail;
@@ -119,44 +112,15 @@ public:
   static int read();
   static void flush();
   static ring_buffer_pos_t available();
-  static void write(const uint8_t c);
+  static size_t write(const uint8_t c);
   static void flushTX();
 
-  static inline bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
+  static bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
 
   FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
   FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
   FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
   FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
-
-  FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
-  FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
-  FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
-  FORCE_INLINE static void print(const char* str) { write(str); }
-
-  static void print(char, int = 0);
-  static void print(unsigned char, int = 0);
-  static void print(int, int = DEC);
-  static void print(unsigned int, int = DEC);
-  static void print(long, int = DEC);
-  static void print(unsigned long, int = DEC);
-  static void print(double, int = 2);
-
-  static void println(const String& s);
-  static void println(const char[]);
-  static void println(char, int = 0);
-  static void println(unsigned char, int = 0);
-  static void println(int, int = DEC);
-  static void println(unsigned int, int = DEC);
-  static void println(long, int = DEC);
-  static void println(unsigned long, int = DEC);
-  static void println(double, int = 2);
-  static void println();
-  operator bool() { return true; }
-
-private:
-  static void printNumber(unsigned long, const uint8_t);
-  static void printFloat(double, uint8_t);
 };
 
 // Serial port configuration
@@ -173,10 +137,17 @@ struct MarlinSerialCfg {
   static constexpr bool MAX_RX_QUEUED     = ENABLED(SERIAL_STATS_MAX_RX_QUEUED);
 };
 
-#if SERIAL_PORT >= 0
-  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+#if defined(SERIAL_PORT) && SERIAL_PORT >= 0
+  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT> > > MSerialT1;
+  extern MSerialT1 customizedSerial1;
 #endif
 
 #if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
-  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
+  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> > > MSerialT2;
+  extern MSerialT2 customizedSerial2;
+#endif
+
+#if defined(SERIAL_PORT_3) && SERIAL_PORT_3 >= 0
+  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> > > MSerialT3;
+  extern MSerialT3 customizedSerial3;
 #endif

Marlin/src/HAL/DUE/MarlinSerialUSB.cpp

@@ -19,13 +19,13 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  *
  */
+#ifdef ARDUINO_ARCH_SAM
 
 /**
  * MarlinSerial_Due.cpp - Hardware serial library for Arduino DUE
  * Copyright (c) 2017 Eduardo José Tagle. All right reserved
  * Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti.  All right reserved.
  */
-#ifdef ARDUINO_ARCH_SAM
 
 #include "../../inc/MarlinConfig.h"
 
@@ -33,10 +33,6 @@
 
 #include "MarlinSerialUSB.h"
 
-#if ENABLED(EMERGENCY_PARSER)
-  #include "../../feature/e_parser.h"
-#endif
-
 // Imports from Atmel USB Stack/CDC implementation
 extern "C" {
   bool usb_task_cdc_isenabled();
@@ -45,15 +41,11 @@ extern "C" {
   int udi_cdc_getc();
   bool udi_cdc_is_tx_ready();
   int udi_cdc_putc(int value);
-};
+}
 
 // Pending character
 static int pending_char = -1;
 
-#if ENABLED(EMERGENCY_PARSER)
-  static EmergencyParser::State emergency_state; // = EP_RESET
-#endif
-
 // Public Methods
 void MarlinSerialUSB::begin(const long) {}
 
@@ -73,7 +65,7 @@ int MarlinSerialUSB::peek() {
 
   pending_char = udi_cdc_getc();
 
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(emergency_state, (char)pending_char));
+  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)pending_char));
 
   return pending_char;
 }
@@ -95,29 +87,27 @@ int MarlinSerialUSB::read() {
 
   int c = udi_cdc_getc();
 
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(emergency_state, (char)c));
+  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)c));
 
   return c;
 }
 
-bool MarlinSerialUSB::available() {
-    /* If Pending chars */
-  return pending_char >= 0 ||
-    /* or USB CDC enumerated and configured on the PC side and some
-       bytes where sent to us */
-      (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
+int MarlinSerialUSB::available() {
+  if (pending_char > 0) return pending_char;
+  return pending_char == 0 ||
+    // or USB CDC enumerated and configured on the PC side and some bytes where sent to us */
+    (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
 }
 
 void MarlinSerialUSB::flush() { }
-void MarlinSerialUSB::flushTX() { }
 
-void MarlinSerialUSB::write(const uint8_t c) {
+size_t MarlinSerialUSB::write(const uint8_t c) {
 
   /* Do not even bother sending anything if USB CDC is not enumerated
      or not configured on the PC side or there is no program on the PC
      listening to our messages */
   if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
-    return;
+    return 0;
 
   /* Wait until the PC has read the pending to be sent data */
   while (usb_task_cdc_isenabled() &&
@@ -129,161 +119,23 @@ void MarlinSerialUSB::write(const uint8_t c) {
      or not configured on the PC side or there is no program on the PC
      listening to our messages at this point */
   if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
-    return;
+    return 0;
 
   // Fifo full
   //  udi_cdc_signal_overrun();
   udi_cdc_putc(c);
-}
-
-/**
- * Imports from print.h
- */
-
-void MarlinSerialUSB::print(char c, int base) {
-  print((long)c, base);
-}
-
-void MarlinSerialUSB::print(unsigned char b, int base) {
-  print((unsigned long)b, base);
-}
-
-void MarlinSerialUSB::print(int n, int base) {
-  print((long)n, base);
-}
-
-void MarlinSerialUSB::print(unsigned int n, int base) {
-  print((unsigned long)n, base);
-}
-
-void MarlinSerialUSB::print(long n, int base) {
-  if (base == 0)
-    write(n);
-  else if (base == 10) {
-    if (n < 0) {
-      print('-');
-      n = -n;
-    }
-    printNumber(n, 10);
-  }
-  else
-    printNumber(n, base);
-}
-
-void MarlinSerialUSB::print(unsigned long n, int base) {
-  if (base == 0) write(n);
-  else printNumber(n, base);
-}
-
-void MarlinSerialUSB::print(double n, int digits) {
-  printFloat(n, digits);
-}
-
-void MarlinSerialUSB::println() {
-  print('\r');
-  print('\n');
-}
-
-void MarlinSerialUSB::println(const String& s) {
-  print(s);
-  println();
-}
-
-void MarlinSerialUSB::println(const char c[]) {
-  print(c);
-  println();
-}
-
-void MarlinSerialUSB::println(char c, int base) {
-  print(c, base);
-  println();
-}
-
-void MarlinSerialUSB::println(unsigned char b, int base) {
-  print(b, base);
-  println();
-}
-
-void MarlinSerialUSB::println(int n, int base) {
-  print(n, base);
-  println();
-}
-
-void MarlinSerialUSB::println(unsigned int n, int base) {
-  print(n, base);
-  println();
-}
-
-void MarlinSerialUSB::println(long n, int base) {
-  print(n, base);
-  println();
-}
-
-void MarlinSerialUSB::println(unsigned long n, int base) {
-  print(n, base);
-  println();
-}
-
-void MarlinSerialUSB::println(double n, int digits) {
-  print(n, digits);
-  println();
-}
-
-// Private Methods
-
-void MarlinSerialUSB::printNumber(unsigned long n, uint8_t base) {
-  if (n) {
-    unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
-    int8_t i = 0;
-    while (n) {
-      buf[i++] = n % base;
-      n /= base;
-    }
-    while (i--)
-      print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
-  }
-  else
-    print('0');
-}
-
-void MarlinSerialUSB::printFloat(double number, uint8_t digits) {
-  // Handle negative numbers
-  if (number < 0.0) {
-    print('-');
-    number = -number;
-  }
-
-  // Round correctly so that print(1.999, 2) prints as "2.00"
-  double rounding = 0.5;
-  LOOP_L_N(i, digits)
-    rounding *= 0.1;
-
-  number += rounding;
-
-  // Extract the integer part of the number and print it
-  unsigned long int_part = (unsigned long)number;
-  double remainder = number - (double)int_part;
-  print(int_part);
-
-  // Print the decimal point, but only if there are digits beyond
-  if (digits) {
-    print('.');
-    // Extract digits from the remainder one at a time
-    while (digits--) {
-      remainder *= 10.0;
-      int toPrint = int(remainder);
-      print(toPrint);
-      remainder -= toPrint;
-    }
-  }
+  return 1;
 }
 
 // Preinstantiate
 #if SERIAL_PORT == -1
-  MarlinSerialUSB customizedSerial1;
+  MSerialT1 customizedSerial1(TERN0(EMERGENCY_PARSER, true));
 #endif
 #if SERIAL_PORT_2 == -1
-  MarlinSerialUSB customizedSerial2;
+  MSerialT2 customizedSerial2(TERN0(EMERGENCY_PARSER, true));
+#endif
+#if SERIAL_PORT_3 == -1
+  MSerialT3 customizedSerial3(TERN0(EMERGENCY_PARSER, true));
 #endif
 
 #endif // HAS_USB_SERIAL

Marlin/src/HAL/DUE/MarlinSerialUSB.h

@@ -27,73 +27,39 @@
  */
 
 #include "../../inc/MarlinConfig.h"
-
-#if HAS_USB_SERIAL
+#include "../../core/serial_hook.h"
 
 #include <WString.h>
 
-#define DEC 10
-#define HEX 16
-#define OCT 8
-#define BIN 2
-
-class MarlinSerialUSB {
-
-public:
-  MarlinSerialUSB() {};
-  static void begin(const long);
-  static void end();
-  static int peek();
-  static int read();
-  static void flush();
-  static void flushTX();
-  static bool available();
-  static void write(const uint8_t c);
+struct MarlinSerialUSB {
+  void begin(const long);
+  void end();
+  int peek();
+  int read();
+  void flush();
+  int available();
+  size_t write(const uint8_t c);
 
   #if ENABLED(SERIAL_STATS_DROPPED_RX)
-    FORCE_INLINE static uint32_t dropped() { return 0; }
+    FORCE_INLINE uint32_t dropped() { return 0; }
   #endif
 
   #if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
-    FORCE_INLINE static int rxMaxEnqueued() { return 0; }
+    FORCE_INLINE int rxMaxEnqueued() { return 0; }
   #endif
-
-  FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
-  FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
-  FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
-  FORCE_INLINE static void print(const char* str) { write(str); }
-
-  static void print(char, int = 0);
-  static void print(unsigned char, int = 0);
-  static void print(int, int = DEC);
-  static void print(unsigned int, int = DEC);
-  static void print(long, int = DEC);
-  static void print(unsigned long, int = DEC);
-  static void print(double, int = 2);
-
-  static void println(const String& s);
-  static void println(const char[]);
-  static void println(char, int = 0);
-  static void println(unsigned char, int = 0);
-  static void println(int, int = DEC);
-  static void println(unsigned int, int = DEC);
-  static void println(long, int = DEC);
-  static void println(unsigned long, int = DEC);
-  static void println(double, int = 2);
-  static void println();
-  operator bool() { return true; }
-
-private:
-  static void printNumber(unsigned long, const uint8_t);
-  static void printFloat(double, uint8_t);
 };
 
 #if SERIAL_PORT == -1
-  extern MarlinSerialUSB customizedSerial1;
+  typedef Serial1Class<MarlinSerialUSB> MSerialT1;
+  extern MSerialT1 customizedSerial1;
 #endif
 
 #if SERIAL_PORT_2 == -1
-  extern MarlinSerialUSB customizedSerial2;
+  typedef Serial1Class<MarlinSerialUSB> MSerialT2;
+  extern MSerialT2 customizedSerial2;
 #endif
 
-#endif // HAS_USB_SERIAL
+#if SERIAL_PORT_3 == -1
+  typedef Serial1Class<MarlinSerialUSB> MSerialT3;
+  extern MSerialT3 customizedSerial3;
+#endif

Marlin/src/HAL/DUE/MinSerial.cpp

@@ -0,0 +1,91 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(POSTMORTEM_DEBUGGING)
+
+#include "../shared/MinSerial.h"
+
+#include <stdarg.h>
+
+static void TXBegin() {
+  // Disable UART interrupt in NVIC
+  NVIC_DisableIRQ( UART_IRQn );
+
+  // We NEED memory barriers to ensure Interrupts are actually disabled!
+  // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
+  __DSB();
+  __ISB();
+
+  // Disable clock
+  pmc_disable_periph_clk( ID_UART );
+
+  // Configure PMC
+  pmc_enable_periph_clk( ID_UART );
+
+  // Disable PDC channel
+  UART->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
+
+  // Reset and disable receiver and transmitter
+  UART->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX | UART_CR_RXDIS | UART_CR_TXDIS;
+
+  // Configure mode: 8bit, No parity, 1 bit stop
+  UART->UART_MR = UART_MR_CHMODE_NORMAL | US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_NO;
+
+  // Configure baudrate (asynchronous, no oversampling) to BAUDRATE bauds
+  UART->UART_BRGR = (SystemCoreClock / (BAUDRATE << 4));
+
+  // Enable receiver and transmitter
+  UART->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
+}
+
+// A SW memory barrier, to ensure GCC does not overoptimize loops
+#define sw_barrier() __asm__ volatile("": : :"memory");
+static void TX(char c) {
+  while (!(UART->UART_SR & UART_SR_TXRDY)) { WDT_Restart(WDT); sw_barrier(); };
+  UART->UART_THR = c;
+}
+
+void install_min_serial() {
+  HAL_min_serial_init = &TXBegin;
+  HAL_min_serial_out = &TX;
+}
+
+#if DISABLED(DYNAMIC_VECTORTABLE)
+  extern "C" {
+    __attribute__((naked)) void JumpHandler_ASM() {
+      __asm__ __volatile__ (
+        "b CommonHandler_ASM\n"
+      );
+    }
+    void __attribute__((naked, alias("JumpHandler_ASM"))) HardFault_Handler();
+    void __attribute__((naked, alias("JumpHandler_ASM"))) BusFault_Handler();
+    void __attribute__((naked, alias("JumpHandler_ASM"))) UsageFault_Handler();
+    void __attribute__((naked, alias("JumpHandler_ASM"))) MemManage_Handler();
+    void __attribute__((naked, alias("JumpHandler_ASM"))) NMI_Handler();
+  }
+#endif
+
+#endif // POSTMORTEM_DEBUGGING
+#endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/Servo.cpp

@@ -47,12 +47,12 @@
 #include "../shared/servo.h"
 #include "../shared/servo_private.h"
 
-static volatile int8_t Channel[_Nbr_16timers];              // counter for the servo being pulsed for each timer (or -1 if refresh interval)
+static Flags<_Nbr_16timers> DisablePending; // ISR should disable the timer at the next timer reset
 
 // ------------------------
 /// Interrupt handler for the TC0 channel 1.
 // ------------------------
-void Servo_Handler(timer16_Sequence_t timer, Tc *pTc, uint8_t channel);
+void Servo_Handler(const timer16_Sequence_t, Tc*, const uint8_t);
 
 #ifdef _useTimer1
   void HANDLER_FOR_TIMER1() { Servo_Handler(_timer1, TC_FOR_TIMER1, CHANNEL_FOR_TIMER1); }
@@ -70,88 +70,92 @@ void Servo_Handler(timer16_Sequence_t timer, Tc *pTc, uint8_t channel);
   void HANDLER_FOR_TIMER5() { Servo_Handler(_timer5, TC_FOR_TIMER5, CHANNEL_FOR_TIMER5); }
 #endif
 
-void Servo_Handler(timer16_Sequence_t timer, Tc *tc, uint8_t channel) {
-  // clear interrupt
-  tc->TC_CHANNEL[channel].TC_SR;
-  if (Channel[timer] < 0)
-    tc->TC_CHANNEL[channel].TC_CCR |= TC_CCR_SWTRG; // channel set to -1 indicated that refresh interval completed so reset the timer
-  else if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && SERVO(timer, Channel[timer]).Pin.isActive)
-    extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, LOW); // pulse this channel low if activated
+void Servo_Handler(const timer16_Sequence_t timer, Tc *tc, const uint8_t channel) {
+  static int8_t Channel[_Nbr_16timers];                               // Servo counters to pulse (or -1 for refresh interval)
+  int8_t cho = Channel[timer];                                        // Handle the prior Channel[timer] first
+  if (cho < 0) {                                                      // Channel -1 indicates the refresh interval completed...
+    tc->TC_CHANNEL[channel].TC_CCR |= TC_CCR_SWTRG;                   // ...so reset the timer
+    if (DisablePending[timer]) {
+      // Disabling only after the full servo period expires prevents
+      // pulses being too close together if immediately re-enabled.
+      DisablePending.clear(timer);
+      TC_Stop(tc, channel);
+      tc->TC_CHANNEL[channel].TC_SR;                                  // clear interrupt
+      return;
+    }
+  }
+  else if (SERVO_INDEX(timer, cho) < ServoCount)                      // prior channel handled?
+    extDigitalWrite(SERVO(timer, cho).Pin.nbr, LOW);                  // pulse the prior channel LOW
 
-  Channel[timer]++;    // increment to the next channel
-  if (SERVO_INDEX(timer, Channel[timer]) < ServoCount && Channel[timer] < SERVOS_PER_TIMER) {
-    tc->TC_CHANNEL[channel].TC_RA = tc->TC_CHANNEL[channel].TC_CV + SERVO(timer,Channel[timer]).ticks;
-    if (SERVO(timer,Channel[timer]).Pin.isActive)    // check if activated
-      extDigitalWrite(SERVO(timer, Channel[timer]).Pin.nbr, HIGH); // its an active channel so pulse it high
+  Channel[timer] = ++cho;                                             // go to the next channel (or 0)
+  if (cho < SERVOS_PER_TIMER && SERVO_INDEX(timer, cho) < ServoCount) {
+    tc->TC_CHANNEL[channel].TC_RA = tc->TC_CHANNEL[channel].TC_CV + SERVO(timer, cho).ticks;
+    if (SERVO(timer, cho).Pin.isActive)                               // activated?
+      extDigitalWrite(SERVO(timer, cho).Pin.nbr, HIGH);               // yes: pulse HIGH
   }
   else {
     // finished all channels so wait for the refresh period to expire before starting over
-    tc->TC_CHANNEL[channel].TC_RA =
-      tc->TC_CHANNEL[channel].TC_CV < usToTicks(REFRESH_INTERVAL) - 4
-        ? (unsigned int)usToTicks(REFRESH_INTERVAL) // allow a few ticks to ensure the next OCR1A not missed
-        : tc->TC_CHANNEL[channel].TC_CV + 4;        // at least REFRESH_INTERVAL has elapsed
-    Channel[timer] = -1; // this will get incremented at the end of the refresh period to start again at the first channel
+    const unsigned int cval = tc->TC_CHANNEL[channel].TC_CV + 128 / (SERVO_TIMER_PRESCALER), // allow 128 cycles to ensure the next CV not missed
+                       ival = (unsigned int)usToTicks(REFRESH_INTERVAL); // at least REFRESH_INTERVAL has elapsed
+    tc->TC_CHANNEL[channel].TC_RA = max(cval, ival);
+
+    Channel[timer] = -1;                                              // reset the timer CCR on the next call
   }
+
+  tc->TC_CHANNEL[channel].TC_SR;                                      // clear interrupt
 }
 
 static void _initISR(Tc *tc, uint32_t channel, uint32_t id, IRQn_Type irqn) {
   pmc_enable_periph_clk(id);
   TC_Configure(tc, channel,
-    TC_CMR_TCCLKS_TIMER_CLOCK3 | // MCK/32
-    TC_CMR_WAVE |                // Waveform mode
-    TC_CMR_WAVSEL_UP_RC );       // Counter running up and reset when equals to RC
+      TC_CMR_WAVE                   // Waveform mode
+    | TC_CMR_WAVSEL_UP_RC           // Counter running up and reset when equal to RC
+    | (SERVO_TIMER_PRESCALER ==   2 ? TC_CMR_TCCLKS_TIMER_CLOCK1 : 0) // MCK/2
+    | (SERVO_TIMER_PRESCALER ==   8 ? TC_CMR_TCCLKS_TIMER_CLOCK2 : 0) // MCK/8
+    | (SERVO_TIMER_PRESCALER ==  32 ? TC_CMR_TCCLKS_TIMER_CLOCK3 : 0) // MCK/32
+    | (SERVO_TIMER_PRESCALER == 128 ? TC_CMR_TCCLKS_TIMER_CLOCK4 : 0) // MCK/128
+  );
 
-  /* 84MHz, MCK/32, for 1.5ms: 3937 */
-  TC_SetRA(tc, channel, 2625); // 1ms
+  // Wait 1ms before the first ISR
+  TC_SetRA(tc, channel, (F_CPU) / (SERVO_TIMER_PRESCALER) / 1000UL); // 1ms
 
-  /* Configure and enable interrupt */
+  // Configure and enable interrupt
   NVIC_EnableIRQ(irqn);
-  // TC_IER_CPAS: RA Compare
-  tc->TC_CHANNEL[channel].TC_IER = TC_IER_CPAS;
+  tc->TC_CHANNEL[channel].TC_IER = TC_IER_CPAS; // TC_IER_CPAS: RA Compare
 
   // Enables the timer clock and performs a software reset to start the counting
   TC_Start(tc, channel);
 }
 
-void initISR(timer16_Sequence_t timer) {
-  #ifdef _useTimer1
-    if (timer == _timer1)
-      _initISR(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1, ID_TC_FOR_TIMER1, IRQn_FOR_TIMER1);
-  #endif
-  #ifdef _useTimer2
-    if (timer == _timer2)
-      _initISR(TC_FOR_TIMER2, CHANNEL_FOR_TIMER2, ID_TC_FOR_TIMER2, IRQn_FOR_TIMER2);
-  #endif
-  #ifdef _useTimer3
-    if (timer == _timer3)
-      _initISR(TC_FOR_TIMER3, CHANNEL_FOR_TIMER3, ID_TC_FOR_TIMER3, IRQn_FOR_TIMER3);
-  #endif
-  #ifdef _useTimer4
-    if (timer == _timer4)
-      _initISR(TC_FOR_TIMER4, CHANNEL_FOR_TIMER4, ID_TC_FOR_TIMER4, IRQn_FOR_TIMER4);
-  #endif
-  #ifdef _useTimer5
-    if (timer == _timer5)
-      _initISR(TC_FOR_TIMER5, CHANNEL_FOR_TIMER5, ID_TC_FOR_TIMER5, IRQn_FOR_TIMER5);
-  #endif
+void initISR(const timer16_Sequence_t timer_index) {
+  CRITICAL_SECTION_START();
+  const bool disable_soon = DisablePending[timer_index];
+  DisablePending.clear(timer_index);
+  CRITICAL_SECTION_END();
+
+  if (!disable_soon) switch (timer_index) {
+    default: break;
+    #ifdef _useTimer1
+      case _timer1: return _initISR(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1, ID_TC_FOR_TIMER1, IRQn_FOR_TIMER1);
+    #endif
+    #ifdef _useTimer2
+      case _timer2: return _initISR(TC_FOR_TIMER2, CHANNEL_FOR_TIMER2, ID_TC_FOR_TIMER2, IRQn_FOR_TIMER2);
+    #endif
+    #ifdef _useTimer3
+      case _timer3: return _initISR(TC_FOR_TIMER3, CHANNEL_FOR_TIMER3, ID_TC_FOR_TIMER3, IRQn_FOR_TIMER3);
+    #endif
+    #ifdef _useTimer4
+      case _timer4: return _initISR(TC_FOR_TIMER4, CHANNEL_FOR_TIMER4, ID_TC_FOR_TIMER4, IRQn_FOR_TIMER4);
+    #endif
+    #ifdef _useTimer5
+      case _timer5: return _initISR(TC_FOR_TIMER5, CHANNEL_FOR_TIMER5, ID_TC_FOR_TIMER5, IRQn_FOR_TIMER5);
+    #endif
+  }
 }
 
-void finISR(timer16_Sequence_t) {
-  #ifdef _useTimer1
-    TC_Stop(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1);
-  #endif
-  #ifdef _useTimer2
-    TC_Stop(TC_FOR_TIMER2, CHANNEL_FOR_TIMER2);
-  #endif
-  #ifdef _useTimer3
-    TC_Stop(TC_FOR_TIMER3, CHANNEL_FOR_TIMER3);
-  #endif
-  #ifdef _useTimer4
-    TC_Stop(TC_FOR_TIMER4, CHANNEL_FOR_TIMER4);
-  #endif
-  #ifdef _useTimer5
-    TC_Stop(TC_FOR_TIMER5, CHANNEL_FOR_TIMER5);
-  #endif
+void finISR(const timer16_Sequence_t timer_index) {
+  // Timer is disabled from the ISR, to ensure proper final pulse length.
+  DisablePending.set(timer_index);
 }
 
 #endif // HAS_SERVOS

Marlin/src/HAL/DUE/ServoTimers.h

@@ -37,7 +37,7 @@
 #define _useTimer5
 
 #define TRIM_DURATION             2   // compensation ticks to trim adjust for digitalWrite delays
-#define SERVO_TIMER_PRESCALER     32  // timer prescaler
+#define SERVO_TIMER_PRESCALER     2   // timer prescaler
 
 /*
   TC0, chan 0 => TC0_Handler

Marlin/src/HAL/DUE/Tone.cpp

@@ -35,20 +35,20 @@
 static pin_t tone_pin;
 volatile static int32_t toggles;
 
-void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration) {
+void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration/*=0*/) {
   tone_pin = _pin;
   toggles = 2 * frequency * duration / 1000;
-  HAL_timer_start(TONE_TIMER_NUM, 2 * frequency);
+  HAL_timer_start(MF_TIMER_TONE, 2 * frequency);
 }
 
 void noTone(const pin_t _pin) {
-  HAL_timer_disable_interrupt(TONE_TIMER_NUM);
+  HAL_timer_disable_interrupt(MF_TIMER_TONE);
   extDigitalWrite(_pin, LOW);
 }
 
 HAL_TONE_TIMER_ISR() {
   static uint8_t pin_state = 0;
-  HAL_timer_isr_prologue(TONE_TIMER_NUM);
+  HAL_timer_isr_prologue(MF_TIMER_TONE);
 
   if (toggles) {
     toggles--;

Marlin/src/HAL/DUE/eeprom_flash.cpp

@@ -1,10 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
- *
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
- * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -60,7 +59,7 @@
 #define EEPROMSize     4096
 #define PagesPerGroup   128
 #define GroupCount        2
-#define PageSize        256u
+#define PageSize        256U
 
  /* Flash storage */
 typedef struct FLASH_SECTOR {
@@ -135,11 +134,11 @@ static uint8_t buffer[256] = {0},   // The RAM buffer to accumulate writes
 #define DEBUG_OUT ENABLED(EE_EMU_DEBUG)
 #include "../../core/debug_out.h"
 
-static void ee_Dump(const int page, const void* data) {
+static void ee_Dump(const int page, const void *data) {
 
   #ifdef EE_EMU_DEBUG
 
-    const uint8_t* c = (const uint8_t*) data;
+    const uint8_t *c = (const uint8_t*) data;
     char buffer[80];
 
     sprintf_P(buffer, PSTR("Page: %d (0x%04x)\n"), page, page);
@@ -181,7 +180,7 @@ static void ee_Dump(const int page, const void* data) {
  * @param data    (pointer to the data buffer)
  */
 __attribute__ ((long_call, section (".ramfunc")))
-static bool ee_PageWrite(uint16_t page, const void* data) {
+static bool ee_PageWrite(uint16_t page, const void *data) {
 
   uint16_t i;
   uint32_t addrflash = uint32_t(getFlashStorage(page));
@@ -199,10 +198,9 @@ static bool ee_PageWrite(uint16_t page, const void* data) {
   for (i = 0; i <PageSize >> 2; i++)
     pageContents[i] = (((uint32_t*)data)[i]) | (~(pageContents[i] ^ ((uint32_t*)data)[i]));
 
-  DEBUG_ECHO_START();
-  DEBUG_ECHOLNPAIR("EEPROM PageWrite   ", page);
-  DEBUG_ECHOLNPAIR(" in FLASH address ", (uint32_t)addrflash);
-  DEBUG_ECHOLNPAIR(" base address     ", (uint32_t)getFlashStorage(0));
+  DEBUG_ECHO_MSG("EEPROM PageWrite   ", page);
+  DEBUG_ECHOLNPGM(" in FLASH address ", (uint32_t)addrflash);
+  DEBUG_ECHOLNPGM(" base address     ", (uint32_t)getFlashStorage(0));
   DEBUG_FLUSH();
 
   // Get the page relative to the start of the EFC controller, and the EFC controller to use
@@ -245,8 +243,7 @@ static bool ee_PageWrite(uint16_t page, const void* data) {
     // Reenable interrupts
     __enable_irq();
 
-    DEBUG_ECHO_START();
-    DEBUG_ECHOLNPAIR("EEPROM Unlock failure for page ", page);
+    DEBUG_ECHO_MSG("EEPROM Unlock failure for page ", page);
     return false;
   }
 
@@ -270,8 +267,7 @@ static bool ee_PageWrite(uint16_t page, const void* data) {
     // Reenable interrupts
     __enable_irq();
 
-    DEBUG_ECHO_START();
-    DEBUG_ECHOLNPAIR("EEPROM Write failure for page ", page);
+    DEBUG_ECHO_MSG("EEPROM Write failure for page ", page);
 
     return false;
   }
@@ -286,15 +282,14 @@ static bool ee_PageWrite(uint16_t page, const void* data) {
   if (memcmp(getFlashStorage(page),data,PageSize)) {
 
     #ifdef EE_EMU_DEBUG
-      DEBUG_ECHO_START();
-      DEBUG_ECHOLNPAIR("EEPROM Verify Write failure for page ", page);
+      DEBUG_ECHO_MSG("EEPROM Verify Write failure for page ", page);
 
       ee_Dump( page, (uint32_t *)addrflash);
       ee_Dump(-page, data);
 
       // Calculate count of changed bits
-      uint32_t* p1 = (uint32_t*)addrflash;
-      uint32_t* p2 = (uint32_t*)data;
+      uint32_t *p1 = (uint32_t*)addrflash;
+      uint32_t *p2 = (uint32_t*)data;
       int count = 0;
       for (i =0; i<PageSize >> 2; i++) {
         if (p1[i] != p2[i]) {
@@ -306,7 +301,7 @@ static bool ee_PageWrite(uint16_t page, const void* data) {
           }
         }
       }
-      DEBUG_ECHOLNPAIR("--> Differing bits: ", count);
+      DEBUG_ECHOLNPGM("--> Differing bits: ", count);
     #endif
 
     return false;
@@ -325,10 +320,9 @@ static bool ee_PageErase(uint16_t page) {
   uint16_t i;
   uint32_t addrflash = uint32_t(getFlashStorage(page));
 
-  DEBUG_ECHO_START();
-  DEBUG_ECHOLNPAIR("EEPROM PageErase  ", page);
-  DEBUG_ECHOLNPAIR(" in FLASH address ", (uint32_t)addrflash);
-  DEBUG_ECHOLNPAIR(" base address     ", (uint32_t)getFlashStorage(0));
+  DEBUG_ECHO_MSG("EEPROM PageErase  ", page);
+  DEBUG_ECHOLNPGM(" in FLASH address ", (uint32_t)addrflash);
+  DEBUG_ECHOLNPGM(" base address     ", (uint32_t)getFlashStorage(0));
   DEBUG_FLUSH();
 
   // Get the page relative to the start of the EFC controller, and the EFC controller to use
@@ -370,8 +364,7 @@ static bool ee_PageErase(uint16_t page) {
     // Reenable interrupts
     __enable_irq();
 
-    DEBUG_ECHO_START();
-    DEBUG_ECHOLNPAIR("EEPROM Unlock failure for page ",page);
+    DEBUG_ECHO_MSG("EEPROM Unlock failure for page ",page);
 
     return false;
   }
@@ -394,8 +387,7 @@ static bool ee_PageErase(uint16_t page) {
     // Reenable interrupts
     __enable_irq();
 
-    DEBUG_ECHO_START();
-    DEBUG_ECHOLNPAIR("EEPROM Erase failure for page ",page);
+    DEBUG_ECHO_MSG("EEPROM Erase failure for page ",page);
 
     return false;
   }
@@ -410,8 +402,7 @@ static bool ee_PageErase(uint16_t page) {
   uint32_t * aligned_src = (uint32_t *) addrflash;
   for (i = 0; i < PageSize >> 2; i++) {
     if (*aligned_src++ != 0xFFFFFFFF) {
-      DEBUG_ECHO_START();
-      DEBUG_ECHOLNPAIR("EEPROM Verify Erase failure for page ",page);
+      DEBUG_ECHO_MSG("EEPROM Verify Erase failure for page ",page);
       ee_Dump(page, (uint32_t *)addrflash);
       return false;
     }
@@ -470,7 +461,7 @@ static uint8_t ee_Read(uint32_t address, bool excludeRAMBuffer=false) {
   for (int page = curPage - 1; page >= 0; --page) {
 
     // Get a pointer to the flash page
-    uint8_t* pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
+    uint8_t *pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
 
     uint16_t i = 0;
     while (i <= (PageSize - 4)) { /* (PageSize - 4) because otherwise, there is not enough room for data and headers */
@@ -550,7 +541,7 @@ static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer=false) {
   for (int page = curPage - 1; page >= 0; --page) {
 
     // Get a pointer to the flash page
-    uint8_t* pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
+    uint8_t *pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
 
     uint16_t i = 0;
     while (i <= (PageSize - 4)) { /* (PageSize - 4) because otherwise, there is not enough room for data and headers */
@@ -589,7 +580,7 @@ static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer=false) {
 }
 
 static bool ee_IsPageClean(int page) {
-  uint32_t* pflash = (uint32_t*) getFlashStorage(page);
+  uint32_t *pflash = (uint32_t*) getFlashStorage(page);
   for (uint16_t i = 0; i < (PageSize >> 2); ++i)
     if (*pflash++ != 0xFFFFFFFF) return false;
   return true;
@@ -599,7 +590,7 @@ static bool ee_Flush(uint32_t overrideAddress = 0xFFFFFFFF, uint8_t overrideData
 
   // Check if RAM buffer has something to be written
   bool isEmpty = true;
-  uint32_t* p = (uint32_t*) &buffer[0];
+  uint32_t *p = (uint32_t*) &buffer[0];
   for (uint16_t j = 0; j < (PageSize >> 2); j++) {
     if (*p++ != 0xFFFFFFFF) {
       isEmpty = false;
@@ -921,8 +912,7 @@ static void ee_Init() {
   // If all groups seem to be used, default to first group
   if (curGroup >= GroupCount) curGroup = 0;
 
-  DEBUG_ECHO_START();
-  DEBUG_ECHOLNPAIR("EEPROM Current Group: ",curGroup);
+  DEBUG_ECHO_MSG("EEPROM Current Group: ",curGroup);
   DEBUG_FLUSH();
 
   // Now, validate that all the other group pages are empty
@@ -931,8 +921,7 @@ static void ee_Init() {
 
     for (int page = 0; page < PagesPerGroup; page++) {
       if (!ee_IsPageClean(grp * PagesPerGroup + page)) {
-        DEBUG_ECHO_START();
-        DEBUG_ECHOLNPAIR("EEPROM Page ", page, " not clean on group ", grp);
+        DEBUG_ECHO_MSG("EEPROM Page ", page, " not clean on group ", grp);
         DEBUG_FLUSH();
         ee_PageErase(grp * PagesPerGroup + page);
       }
@@ -948,15 +937,13 @@ static void ee_Init() {
     }
   }
 
-  DEBUG_ECHO_START();
-  DEBUG_ECHOLNPAIR("EEPROM Active page: ", curPage);
+  DEBUG_ECHO_MSG("EEPROM Active page: ", curPage);
   DEBUG_FLUSH();
 
   // Make sure the pages following the first clean one are also clean
   for (int page = curPage + 1; page < PagesPerGroup; page++) {
     if (!ee_IsPageClean(curGroup * PagesPerGroup + page)) {
-      DEBUG_ECHO_START();
-      DEBUG_ECHOLNPAIR("EEPROM Page ", page, " not clean on active group ", curGroup);
+      DEBUG_ECHO_MSG("EEPROM Page ", page, " not clean on active group ", curGroup);
       DEBUG_FLUSH();
       ee_Dump(curGroup * PagesPerGroup + page, getFlashStorage(curGroup * PagesPerGroup + page));
       ee_PageErase(curGroup * PagesPerGroup + page);
@@ -971,19 +958,18 @@ static void ee_Init() {
 #ifndef MARLIN_EEPROM_SIZE
   #define MARLIN_EEPROM_SIZE 0x1000 // 4KB
 #endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
+size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE - eeprom_exclude_size; }
 bool PersistentStore::access_start()  { ee_Init();  return true; }
 bool PersistentStore::access_finish() { ee_Flush(); return true; }
 
 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  uint16_t written = 0;
   while (size--) {
-    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t * const p = (uint8_t * const)REAL_EEPROM_ADDR(pos);
     uint8_t v = *value;
-    // EEPROM has only ~100,000 write cycles,
-    // so only write bytes that have changed!
-    if (v != ee_Read(uint32_t(p))) {
+    if (v != ee_Read(uint32_t(p))) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
       ee_Write(uint32_t(p), v);
-      delay(2);
+      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
       if (ee_Read(uint32_t(p)) != v) {
         SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
         return true;
@@ -996,9 +982,9 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
   return false;
 }
 
-bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
   do {
-    uint8_t c = ee_Read(uint32_t(pos));
+    uint8_t c = ee_Read(uint32_t(REAL_EEPROM_ADDR(pos)));
     if (writing) *value = c;
     crc16(crc, &c, 1);
     pos++;

Marlin/src/HAL/DUE/eeprom_wired.cpp

@@ -1,10 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
- *
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
- * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -37,19 +36,18 @@
 #ifndef MARLIN_EEPROM_SIZE
   #error "MARLIN_EEPROM_SIZE is required for I2C / SPI EEPROM."
 #endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
+size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE - eeprom_exclude_size; }
 bool PersistentStore::access_start()  { eeprom_init(); return true; }
 bool PersistentStore::access_finish() { return true; }
 
 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  uint16_t written = 0;
   while (size--) {
-    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t * const p = (uint8_t * const)REAL_EEPROM_ADDR(pos);
     uint8_t v = *value;
-    // EEPROM has only ~100,000 write cycles,
-    // so only write bytes that have changed!
-    if (v != eeprom_read_byte(p)) {
+    if (v != eeprom_read_byte(p)) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
       eeprom_write_byte(p, v);
-      delay(2);
+      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
       if (eeprom_read_byte(p) != v) {
         SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
         return true;
@@ -62,9 +60,9 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
   return false;
 }
 
-bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
   do {
-    uint8_t c = eeprom_read_byte((uint8_t*)pos);
+    const uint8_t c = eeprom_read_byte((uint8_t*)REAL_EEPROM_ADDR(pos));
     if (writing) *value = c;
     crc16(crc, &c, 1);
     pos++;

Marlin/src/HAL/DUE/endstop_interrupts.h

@@ -47,21 +47,33 @@ void endstop_ISR() { endstops.update(); }
 
 void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
-  TERN_(HAS_X_MAX, _ATTACH(X_MAX_PIN));
-  TERN_(HAS_X_MIN, _ATTACH(X_MIN_PIN));
-  TERN_(HAS_Y_MAX, _ATTACH(Y_MAX_PIN));
-  TERN_(HAS_Y_MIN, _ATTACH(Y_MIN_PIN));
-  TERN_(HAS_Z_MAX, _ATTACH(Z_MAX_PIN));
-  TERN_(HAS_Z_MIN, _ATTACH(Z_MIN_PIN));
-  TERN_(HAS_X2_MAX, _ATTACH(X2_MAX_PIN));
-  TERN_(HAS_X2_MIN, _ATTACH(X2_MIN_PIN));
-  TERN_(HAS_Y2_MAX, _ATTACH(Y2_MAX_PIN));
-  TERN_(HAS_Y2_MIN, _ATTACH(Y2_MIN_PIN));
-  TERN_(HAS_Z2_MAX, _ATTACH(Z2_MAX_PIN));
-  TERN_(HAS_Z2_MIN, _ATTACH(Z2_MIN_PIN));
-  TERN_(HAS_Z3_MAX, _ATTACH(Z3_MAX_PIN));
-  TERN_(HAS_Z3_MIN, _ATTACH(Z3_MIN_PIN));
-  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
-  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
-  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(USE_X_MAX,       _ATTACH(X_MAX_PIN));
+  TERN_(USE_X_MIN,       _ATTACH(X_MIN_PIN));
+  TERN_(USE_Y_MAX,       _ATTACH(Y_MAX_PIN));
+  TERN_(USE_Y_MIN,       _ATTACH(Y_MIN_PIN));
+  TERN_(USE_Z_MAX,       _ATTACH(Z_MAX_PIN));
+  TERN_(USE_Z_MIN,       _ATTACH(Z_MIN_PIN));
+  TERN_(USE_X2_MAX,      _ATTACH(X2_MAX_PIN));
+  TERN_(USE_X2_MIN,      _ATTACH(X2_MIN_PIN));
+  TERN_(USE_Y2_MAX,      _ATTACH(Y2_MAX_PIN));
+  TERN_(USE_Y2_MIN,      _ATTACH(Y2_MIN_PIN));
+  TERN_(USE_Z2_MAX,      _ATTACH(Z2_MAX_PIN));
+  TERN_(USE_Z2_MIN,      _ATTACH(Z2_MIN_PIN));
+  TERN_(USE_Z3_MAX,      _ATTACH(Z3_MAX_PIN));
+  TERN_(USE_Z3_MIN,      _ATTACH(Z3_MIN_PIN));
+  TERN_(USE_Z4_MAX,      _ATTACH(Z4_MAX_PIN));
+  TERN_(USE_Z4_MIN,      _ATTACH(Z4_MIN_PIN));
+  TERN_(USE_Z_MIN_PROBE, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(USE_I_MAX,       _ATTACH(I_MAX_PIN));
+  TERN_(USE_I_MIN,       _ATTACH(I_MIN_PIN));
+  TERN_(USE_J_MAX,       _ATTACH(J_MAX_PIN));
+  TERN_(USE_J_MIN,       _ATTACH(J_MIN_PIN));
+  TERN_(USE_K_MAX,       _ATTACH(K_MAX_PIN));
+  TERN_(USE_K_MIN,       _ATTACH(K_MIN_PIN));
+  TERN_(USE_U_MAX,       _ATTACH(U_MAX_PIN));
+  TERN_(USE_U_MIN,       _ATTACH(U_MIN_PIN));
+  TERN_(USE_V_MAX,       _ATTACH(V_MAX_PIN));
+  TERN_(USE_V_MIN,       _ATTACH(V_MIN_PIN));
+  TERN_(USE_W_MAX,       _ATTACH(W_MAX_PIN));
+  TERN_(USE_W_MIN,       _ATTACH(W_MIN_PIN));
 }

Marlin/src/HAL/DUE/fastio.h

@@ -33,7 +33,7 @@
  * For ARDUINO_ARCH_SAM
  * Note the code here was specifically crafted by disassembling what GCC produces
  * out of it, so GCC is able to optimize it out as much as possible to the least
- * amount of instructions. Be very carefull if you modify them, as "clean code"
+ * amount of instructions. Be very careful if you modify them, as "clean code"
  * leads to less efficient compiled code!!
  */
 
@@ -50,7 +50,7 @@
 #define PWM_PIN(P)              WITHIN(P, 2, 13)
 
 #ifndef MASK
-  #define MASK(PIN) (1 << PIN)
+  #define MASK(PIN) _BV(PIN)
 #endif
 
 /**
@@ -163,6 +163,9 @@
 #define SET_INPUT(IO)        _SET_INPUT(IO)
 // Set pin as input with pullup (wrapper)
 #define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
+// Set pin as input with pulldown (substitution)
+#define SET_INPUT_PULLDOWN   SET_INPUT
+
 // Set pin as output (wrapper) -  reads the pin and sets the output to that value
 #define SET_OUTPUT(IO)       _SET_OUTPUT(IO)
 // Set pin as PWM
@@ -186,12 +189,12 @@
  */
 
 // UART
-#define RXD        DIO0
-#define TXD        DIO1
+#define RXD        0
+#define TXD        1
 
 // TWI (I2C)
-#define SCL        DIO21
-#define SDA        DIO20
+#define SCL        21
+#define SDA        20
 
 /**
  * pins
@@ -477,7 +480,7 @@
 #define DIO91_PIN 15
 #define DIO91_WPORT PIOB
 
-#if ARDUINO_SAM_ARCHIM
+#ifdef ARDUINO_SAM_ARCHIM
 
   #define DIO92_PIN 11
   #define DIO92_WPORT PIOC

Marlin/src/HAL/DUE/fastio/G2_PWM.cpp

@@ -25,7 +25,7 @@
  * is NOT used to directly toggle pins. The ISR writes to the pin assigned to
  * that interrupt.
  *
- * All PWMs use the same repetition rate.  The G2 needs about 10KHz min in order to
+ * All PWMs use the same repetition rate.  The G2 needs about 10kHz min in order to
  * not have obvious ripple on the Vref signals.
  *
  * The data structures are setup to minimize the computation done by the ISR which
@@ -154,7 +154,7 @@ void Stepper::digipot_init() {
   NVIC_SetPriority(PWM_IRQn, NVIC_EncodePriority(0, 10, 0));  // normal priority for PWM module (can stand some jitter on the Vref signals)
 }
 
-void Stepper::digipot_current(const uint8_t driver, const int16_t current) {
+void Stepper::set_digipot_current(const uint8_t driver, const int16_t current) {
 
   if (!(PWM->PWM_CH_NUM[0].PWM_CPRD == PWM_PERIOD_US)) digipot_init();  // Init PWM system if needed
 

Marlin/src/HAL/DUE/fastio/G2_PWM.h

@@ -49,7 +49,6 @@ extern volatile uint32_t *SODR_A, *SODR_B, *CODR_A, *CODR_B;
 
 #define PWM_MAP_INIT_ROW(IO,ZZ) { ZZ == 'A' ? SODR_A : SODR_B,  ZZ == 'A' ? CODR_A : CODR_B, 1 << _PIN(IO) }
 
-
 #define PWM_MAP_INIT {  PWM_MAP_INIT_ROW(MOTOR_CURRENT_PWM_X_PIN, 'B'), \
                         PWM_MAP_INIT_ROW(MOTOR_CURRENT_PWM_Y_PIN, 'B'), \
                         PWM_MAP_INIT_ROW(MOTOR_CURRENT_PWM_Z_PIN, 'B'), \
@@ -63,7 +62,7 @@ extern PWM_map ISR_table[NUM_PWMS];
 extern uint32_t motor_current_setting[3];
 
 #define IR_BIT(p) (WITHIN(p, 0, 3) ? (p) : (p) + 4)
-#define COPY_ACTIVE_TABLE() do{ LOOP_L_N(i, 6) work_table[i] = active_table[i]; }while(0)
+#define COPY_ACTIVE_TABLE() do{ for (uint8_t i = 0; i < 6; ++i) work_table[i] = active_table[i]; }while(0)
 
 #define PWM_MR0 19999         // base repetition rate minus one count - 20mS
 #define PWM_PR 24             // prescaler value - prescaler divide by 24 + 1  -  1 MHz output

Marlin/src/HAL/DUE/fastio/G2_pins.h

@@ -168,7 +168,6 @@ const G2_PinDescription G2_g_APinDescription[] = {
   { PIOB, PIO_PB21,          ID_PIOB, PIO_OUTPUT_0, PIO_DEFAULT, PIN_ATTR_DIGITAL,                  NO_ADC, NO_ADC, NOT_ON_PWM,  NOT_ON_TIMER }, // PIN 52
   { PIOB, PIO_PB14,          ID_PIOB, PIO_OUTPUT_0, PIO_DEFAULT, PIN_ATTR_DIGITAL,                  NO_ADC, NO_ADC, NOT_ON_PWM,  NOT_ON_TIMER }, // PIN 53
 
-
   // 54 .. 65 - Analog pins
   // ----------------------
   { PIOA, PIO_PA16X1_AD7,    ID_PIOA, PIO_INPUT,    PIO_DEFAULT, PIN_ATTR_ANALOG,                   ADC0,   ADC7,   NOT_ON_PWM,  NOT_ON_TIMER }, // AD0

Marlin/src/HAL/DUE/inc/Conditionals_LCD.h

@@ -20,7 +20,3 @@
  *
  */
 #pragma once
-
-#if HAS_SPI_TFT || HAS_FSMC_TFT
-  #error "Sorry! TFT displays are not available for HAL/DUE."
-#endif

Marlin/src/HAL/DUE/inc/Conditionals_post.h

@@ -23,6 +23,6 @@
 
 #if USE_FALLBACK_EEPROM
   #define FLASH_EEPROM_EMULATION
-#elif EITHER(I2C_EEPROM, SPI_EEPROM)
+#elif ANY(I2C_EEPROM, SPI_EEPROM)
   #define USE_SHARED_EEPROM 1
 #endif

Marlin/src/HAL/DUE/inc/Conditionals_type.h

@@ -0,0 +1,22 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2024 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once

Marlin/src/HAL/DUE/inc/SanityCheck.h

@@ -25,6 +25,34 @@
  * Test Arduino Due specific configuration values for errors at compile-time.
  */
 
+#if HAS_SPI_TFT || HAS_FSMC_TFT
+  #error "Sorry! TFT displays are not available for HAL/DUE."
+#endif
+
+/**
+ * Check for common serial pin conflicts
+ */
+#define CHECK_SERIAL_PIN(N) ( \
+     X_STOP_PIN == N || Y_STOP_PIN == N || Z_STOP_PIN == N \
+  || X_MIN_PIN  == N || Y_MIN_PIN  == N || Z_MIN_PIN  == N \
+  || X_MAX_PIN  == N || Y_MAX_PIN  == N || Z_MAX_PIN  == N \
+  || X_STEP_PIN == N || Y_STEP_PIN == N || Z_STEP_PIN == N \
+  || X_DIR_PIN  == N || Y_DIR_PIN  == N || Z_DIR_PIN  == N \
+  || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN  == N \
+)
+#if SERIAL_IN_USE(0) // D0-D1. No known conflicts.
+#endif
+#if SERIAL_IN_USE(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
+  #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
+#endif
+#if SERIAL_IN_USE(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
+  #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
+#endif
+#if SERIAL_IN_USE(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
+  #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
+#endif
+#undef CHECK_SERIAL_PIN
+
 /**
  * HARDWARE VS. SOFTWARE SPI COMPATIBILITY
  *
@@ -40,22 +68,26 @@
  * Usually the hardware SPI pins are only available to the LCD. This makes the DUE hard SPI used at the same time
  * as the TMC2130 soft SPI the most common setup.
  */
-#define _IS_HW_SPI(P) (defined(TMC_SW_##P) && (TMC_SW_##P == MOSI_PIN || TMC_SW_##P == MISO_PIN || TMC_SW_##P == SCK_PIN))
+#define _IS_HW_SPI(P) (defined(TMC_SPI_##P) && (TMC_SPI_##P == SD_MOSI_PIN || TMC_SPI_##P == SD_MISO_PIN || TMC_SPI_##P == SD_SCK_PIN))
 
-#if ENABLED(SDSUPPORT) && HAS_DRIVER(TMC2130)
+#if HAS_MEDIA && HAS_DRIVER(TMC2130)
   #if ENABLED(TMC_USE_SW_SPI)
-    #if DISABLED(DUE_SOFTWARE_SPI) && (_IS_HW_SPI(MOSI) || _IS_HW_SPI(MISO) || _IS_HW_SPI(SCK))
+    #if DISABLED(SOFTWARE_SPI) && (_IS_HW_SPI(MOSI) || _IS_HW_SPI(MISO) || _IS_HW_SPI(SCK))
       #error "DUE hardware SPI is required but is incompatible with TMC2130 software SPI. Either disable TMC_USE_SW_SPI or use separate pins for the two SPIs."
     #endif
-  #elif ENABLED(DUE_SOFTWARE_SPI)
+  #elif ENABLED(SOFTWARE_SPI)
     #error "DUE software SPI is required but is incompatible with TMC2130 hardware SPI. Enable TMC_USE_SW_SPI to fix."
   #endif
 #endif
 
 #if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
-  #error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on DUE."
+  #error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported for HAL/DUE."
 #endif
 
 #if HAS_TMC_SW_SERIAL
-  #error "TMC220x Software Serial is not supported on this platform."
+  #error "TMC220x Software Serial is not supported on the DUE platform."
+#endif
+
+#if USING_PULLDOWNS
+  #error "PULLDOWN pin mode is not available on DUE boards."
 #endif

Marlin/src/HAL/DUE/pinsDebug.h

@@ -2,6 +2,9 @@
  * Marlin 3D Printer Firmware
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -50,7 +53,7 @@
  *     The net result is that both the g_pinStatus[pin] array and the PIO_OSR register
  *     needs to be looked at when determining if a pin is an input or an output.
  *
- * b) Due has only pins 6, 7, 8 & 9 enabled for PWMs.  FYI - they run at 1KHz
+ * b) Due has only pins 6, 7, 8 & 9 enabled for PWMs.  FYI - they run at 1kHz
  *
  * c) NUM_DIGITAL_PINS does not include the analog pins
  *
@@ -61,12 +64,12 @@
 #define NUMBER_PINS_TOTAL PINS_COUNT
 
 #define digitalRead_mod(p) extDigitalRead(p)  // AVR digitalRead disabled PWM before it read the pin
-#define PRINT_PORT(p)
 #define PRINT_ARRAY_NAME(x) do{ sprintf_P(buffer, PSTR("%-" STRINGIFY(MAX_NAME_LENGTH) "s"), pin_array[x].name); SERIAL_ECHO(buffer); }while(0)
 #define PRINT_PIN(p) do{ sprintf_P(buffer, PSTR("%02d"), p); SERIAL_ECHO(buffer); }while(0)
+#define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
 #define GET_ARRAY_PIN(p) pin_array[p].pin
 #define GET_ARRAY_IS_DIGITAL(p) pin_array[p].is_digital
-#define VALID_PIN(pin) (pin >= 0 && pin < (int8_t)NUMBER_PINS_TOTAL ? 1 : 0)
+#define VALID_PIN(pin) (pin >= 0 && pin < int8_t(NUMBER_PINS_TOTAL))
 #define DIGITAL_PIN_TO_ANALOG_PIN(p) int(p - analogInputToDigitalPin(0))
 #define IS_ANALOG(P) WITHIN(P, char(analogInputToDigitalPin(0)), char(analogInputToDigitalPin(NUM_ANALOG_INPUTS - 1)))
 #define pwm_status(pin) (((g_pinStatus[pin] & 0xF) == PIN_STATUS_PWM) && \
@@ -82,14 +85,15 @@ bool GET_PINMODE(int8_t pin) {  // 1: output, 0: input
           || pwm_status(pin));
 }
 
-
 void pwm_details(int32_t pin) {
   if (pwm_status(pin)) {
     uint32_t chan = g_APinDescription[pin].ulPWMChannel;
-    SERIAL_ECHOPAIR("PWM = ", PWM_INTERFACE->PWM_CH_NUM[chan].PWM_CDTY);
+    SERIAL_ECHOPGM("PWM = ", PWM_INTERFACE->PWM_CH_NUM[chan].PWM_CDTY);
   }
 }
 
+void print_port(const pin_t) {}
+
 /**
  * DUE Board pin   |  PORT  | Label
  * ----------------+--------+-------

Marlin/src/HAL/DUE/spi_pins.h

@@ -43,22 +43,22 @@
     #define SPI_PIN         87
     #define SPI_CHAN         1
   #endif
-  #define SCK_PIN           76
-  #define MISO_PIN          74
-  #define MOSI_PIN          75
+  #define SD_SCK_PIN        76
+  #define SD_MISO_PIN       74
+  #define SD_MOSI_PIN       75
 #else
   // defaults
-  #define DUE_SOFTWARE_SPI
-  #ifndef SCK_PIN
-    #define SCK_PIN           52
+  #define SOFTWARE_SPI
+  #ifndef SD_SCK_PIN
+    #define SD_SCK_PIN      52
   #endif
-  #ifndef MISO_PIN
-    #define MISO_PIN          50
+  #ifndef SD_MISO_PIN
+    #define SD_MISO_PIN     50
   #endif
-  #ifndef MOSI_PIN
-    #define MOSI_PIN          51
+  #ifndef SD_MOSI_PIN
+    #define SD_MOSI_PIN     51
   #endif
 #endif
 
 /* A.28, A.29, B.21, C.26, C.29 */
-#define SS_PIN            SDSS
+#define SD_SS_PIN         SDSS

Marlin/src/HAL/DUE/timers.cpp

@@ -1,9 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
- *
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -42,7 +42,7 @@
 // Private Variables
 // ------------------------
 
-const tTimerConfig TimerConfig [NUM_HARDWARE_TIMERS] = {
+const tTimerConfig timer_config[NUM_HARDWARE_TIMERS] = {
   { TC0, 0, TC0_IRQn,  3}, // 0 - [servo timer5]
   { TC0, 1, TC1_IRQn,  0}, // 1
   { TC0, 2, TC2_IRQn,  2}, // 2 - stepper
@@ -66,9 +66,9 @@ const tTimerConfig TimerConfig [NUM_HARDWARE_TIMERS] = {
 */
 
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
-  Tc *tc = TimerConfig[timer_num].pTimerRegs;
-  IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
-  uint32_t channel = TimerConfig[timer_num].channel;
+  Tc *tc = timer_config[timer_num].pTimerRegs;
+  IRQn_Type irq = timer_config[timer_num].IRQ_Id;
+  uint32_t channel = timer_config[timer_num].channel;
 
   // Disable interrupt, just in case it was already enabled
   NVIC_DisableIRQ(irq);
@@ -86,13 +86,20 @@ void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
 
   pmc_set_writeprotect(false);
   pmc_enable_periph_clk((uint32_t)irq);
-  NVIC_SetPriority(irq, TimerConfig [timer_num].priority);
+  NVIC_SetPriority(irq, timer_config[timer_num].priority);
 
   // wave mode, reset counter on match with RC,
-  TC_Configure(tc, channel, TC_CMR_WAVE | TC_CMR_WAVSEL_UP_RC | TC_CMR_TCCLKS_TIMER_CLOCK1);
+  TC_Configure(tc, channel,
+      TC_CMR_WAVE
+    | TC_CMR_WAVSEL_UP_RC
+    | (HAL_TIMER_PRESCALER ==   2 ? TC_CMR_TCCLKS_TIMER_CLOCK1 : 0)
+    | (HAL_TIMER_PRESCALER ==   8 ? TC_CMR_TCCLKS_TIMER_CLOCK2 : 0)
+    | (HAL_TIMER_PRESCALER ==  32 ? TC_CMR_TCCLKS_TIMER_CLOCK3 : 0)
+    | (HAL_TIMER_PRESCALER == 128 ? TC_CMR_TCCLKS_TIMER_CLOCK4 : 0)
+  );
 
   // Set compare value
-  TC_SetRC(tc, channel, VARIANT_MCK / 2 / frequency);
+  TC_SetRC(tc, channel, VARIANT_MCK / (HAL_TIMER_PRESCALER) / frequency);
 
   // And start timer
   TC_Start(tc, channel);
@@ -105,12 +112,12 @@ void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
 }
 
 void HAL_timer_enable_interrupt(const uint8_t timer_num) {
-  IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
+  IRQn_Type irq = timer_config[timer_num].IRQ_Id;
   NVIC_EnableIRQ(irq);
 }
 
 void HAL_timer_disable_interrupt(const uint8_t timer_num) {
-  IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
+  IRQn_Type irq = timer_config[timer_num].IRQ_Id;
   NVIC_DisableIRQ(irq);
 
   // We NEED memory barriers to ensure Interrupts are actually disabled!
@@ -121,11 +128,11 @@ void HAL_timer_disable_interrupt(const uint8_t timer_num) {
 
 // missing from CMSIS: Check if interrupt is enabled or not
 static bool NVIC_GetEnabledIRQ(IRQn_Type IRQn) {
-  return (NVIC->ISER[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F))) != 0;
+  return TEST(NVIC->ISER[uint32_t(IRQn) >> 5], uint32_t(IRQn) & 0x1F);
 }
 
 bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
-  IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
+  IRQn_Type irq = timer_config[timer_num].IRQ_Id;
   return NVIC_GetEnabledIRQ(irq);
 }
 

Marlin/src/HAL/DUE/timers.h

@@ -1,8 +1,9 @@
 /**
  * Marlin 3D Printer Firmware
- *
  * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -35,37 +36,38 @@
 typedef uint32_t hal_timer_t;
 #define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
 
-#define HAL_TIMER_RATE         ((F_CPU) / 2)    // frequency of timers peripherals
+#define HAL_TIMER_PRESCALER    2
+#define HAL_TIMER_RATE         ((F_CPU) / (HAL_TIMER_PRESCALER))  // frequency of timers peripherals
 
-#ifndef STEP_TIMER_NUM
-  #define STEP_TIMER_NUM        2  // Timer Index for Stepper
+#ifndef MF_TIMER_STEP
+  #define MF_TIMER_STEP         2  // Timer Index for Stepper
 #endif
-#ifndef PULSE_TIMER_NUM
-  #define PULSE_TIMER_NUM       STEP_TIMER_NUM
+#ifndef MF_TIMER_PULSE
+  #define MF_TIMER_PULSE        MF_TIMER_STEP
 #endif
-#ifndef TEMP_TIMER_NUM
-  #define TEMP_TIMER_NUM        4  // Timer Index for Temperature
+#ifndef MF_TIMER_TEMP
+  #define MF_TIMER_TEMP         4  // Timer Index for Temperature
 #endif
-#ifndef TONE_TIMER_NUM
-  #define TONE_TIMER_NUM        6  // index of timer to use for beeper tones
+#ifndef MF_TIMER_TONE
+  #define MF_TIMER_TONE         6  // index of timer to use for beeper tones
 #endif
 
 #define TEMP_TIMER_FREQUENCY   1000 // temperature interrupt frequency
 
-#define STEPPER_TIMER_RATE     HAL_TIMER_RATE   // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
-#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
-#define STEPPER_TIMER_PRESCALE (CYCLES_PER_MICROSECOND / STEPPER_TIMER_TICKS_PER_US)
+#define STEPPER_TIMER_RATE          HAL_TIMER_RATE                                        // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
+#define STEPPER_TIMER_TICKS_PER_US  ((STEPPER_TIMER_RATE) / 1000000)                      // stepper timer ticks per µs
+#define STEPPER_TIMER_PRESCALE      (CYCLES_PER_MICROSECOND / STEPPER_TIMER_TICKS_PER_US)
 
-#define PULSE_TIMER_RATE       STEPPER_TIMER_RATE   // frequency of pulse timer
-#define PULSE_TIMER_PRESCALE   STEPPER_TIMER_PRESCALE
-#define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
+#define PULSE_TIMER_RATE            STEPPER_TIMER_RATE                                    // frequency of pulse timer
+#define PULSE_TIMER_PRESCALE        STEPPER_TIMER_PRESCALE
+#define PULSE_TIMER_TICKS_PER_US    STEPPER_TIMER_TICKS_PER_US
 
-#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
-#define DISABLE_STEPPER_DRIVER_INTERRUPT()  HAL_timer_disable_interrupt(STEP_TIMER_NUM)
-#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
+#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(MF_TIMER_STEP)
+#define DISABLE_STEPPER_DRIVER_INTERRUPT()  HAL_timer_disable_interrupt(MF_TIMER_STEP)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(MF_TIMER_STEP)
 
-#define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
-#define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
+#define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(MF_TIMER_TEMP)
+#define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(MF_TIMER_TEMP)
 
 #ifndef HAL_STEP_TIMER_ISR
   #define HAL_STEP_TIMER_ISR() void TC2_Handler()
@@ -92,7 +94,7 @@ typedef struct {
 // Public Variables
 // ------------------------
 
-extern const tTimerConfig TimerConfig[];
+extern const tTimerConfig timer_config[];
 
 // ------------------------
 // Public functions
@@ -101,17 +103,17 @@ extern const tTimerConfig TimerConfig[];
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
 
 FORCE_INLINE static void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare) {
-  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &timer_config[timer_num];
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_RC = compare;
 }
 
 FORCE_INLINE static hal_timer_t HAL_timer_get_compare(const uint8_t timer_num) {
-  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &timer_config[timer_num];
   return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_RC;
 }
 
 FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
-  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &timer_config[timer_num];
   return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_CV;
 }
 
@@ -120,9 +122,9 @@ void HAL_timer_disable_interrupt(const uint8_t timer_num);
 bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 
 FORCE_INLINE static void HAL_timer_isr_prologue(const uint8_t timer_num) {
-  const tTimerConfig * const pConfig = &TimerConfig[timer_num];
+  const tTimerConfig * const pConfig = &timer_config[timer_num];
   // Reading the status register clears the interrupt flag
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_SR;
 }
 
-#define HAL_timer_isr_epilogue(TIMER_NUM)
+#define HAL_timer_isr_epilogue(T) NOOP

Marlin/src/HAL/DUE/u8g/LCD_defines.h

@@ -0,0 +1,34 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * DUE (SAM3X8E) LCD-specific defines
+ */
+
+uint8_t u8g_com_HAL_DUE_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+uint8_t u8g_com_HAL_DUE_shared_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+
+#define U8G_COM_HAL_SW_SPI_FN     u8g_com_HAL_DUE_sw_spi_fn
+#define U8G_COM_HAL_HW_SPI_FN     u8g_com_HAL_DUE_shared_hw_spi_fn
+#define U8G_COM_ST7920_HAL_SW_SPI u8g_com_HAL_DUE_ST7920_sw_spi_fn

Marlin/src/HAL/DUE/u8g/u8g_com_HAL_DUE_shared_hw_spi.cpp

@@ -20,7 +20,6 @@
  *
  */
 
-
 /**
  * Based on u8g_com_msp430_hw_spi.c
  *
@@ -60,16 +59,15 @@
 
 #if HAS_MARLINUI_U8GLIB
 
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
 #include "../../../MarlinCore.h"
 
-void spiBegin();
-void spiInit(uint8_t spiRate);
-void spiSend(uint8_t b);
-void spiSend(const uint8_t* buf, size_t n);
+#ifndef LCD_SPI_SPEED
+  #define LCD_SPI_SPEED SPI_QUARTER_SPEED
+#endif
 
-#include "../../shared/Marduino.h"
+#include "../../shared/HAL_SPI.h"
 #include "../fastio.h"
 
 void u8g_SetPIOutput_DUE_hw_spi(u8g_t *u8g, uint8_t pin_index) {
@@ -100,11 +98,7 @@ uint8_t u8g_com_HAL_DUE_shared_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
 
       spiBegin();
 
-      #ifndef SPI_SPEED
-        #define SPI_SPEED SPI_FULL_SPEED  // use same SPI speed as SD card
-      #endif
-      spiInit(2);
-
+      spiInit(LCD_SPI_SPEED);
       break;
 
     case U8G_COM_MSG_ADDRESS:                     /* define cmd (arg_val = 0) or data mode (arg_val = 1) */

Marlin/src/HAL/DUE/u8g/u8g_com_HAL_DUE_st7920_sw_spi.cpp

@@ -57,11 +57,12 @@
 
 #include "../../../inc/MarlinConfigPre.h"
 
-#if ENABLED(U8GLIB_ST7920)
+#if IS_U8GLIB_ST7920
 
+#include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"
 
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
 #include "u8g_com_HAL_DUE_sw_spi_shared.h"
 
@@ -145,7 +146,7 @@ uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
 }
 
 #if ENABLED(LIGHTWEIGHT_UI)
-  #include "../../../lcd/ultralcd.h"
+  #include "../../../lcd/marlinui.h"
   #include "../../shared/HAL_ST7920.h"
 
   #define ST7920_CS_PIN LCD_PINS_RS
@@ -181,5 +182,5 @@ uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
   }
 #endif // LIGHTWEIGHT_UI
 
-#endif // U8GLIB_ST7920
+#endif // IS_U8GLIB_ST7920
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/u8g/u8g_com_HAL_DUE_sw_spi.cpp

@@ -57,17 +57,14 @@
 
 #include "../../../inc/MarlinConfigPre.h"
 
-#if HAS_MARLINUI_U8GLIB && DISABLED(U8GLIB_ST7920)
-
-#undef SPI_SPEED
-#define SPI_SPEED 2  // About 2 MHz
+#if HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
 
 #include "u8g_com_HAL_DUE_sw_spi_shared.h"
 
 #include "../../shared/Marduino.h"
 #include "../../shared/Delay.h"
 
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
 #if ENABLED(FYSETC_MINI_12864)
   #define SPISEND_SW_DUE u8g_spiSend_sw_DUE_mode_3
@@ -144,5 +141,5 @@ uint8_t u8g_com_HAL_DUE_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void
   return 1;
 }
 
-#endif // HAS_MARLINUI_U8GLIB && !U8GLIB_ST7920
+#endif // HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/u8g/u8g_com_HAL_DUE_sw_spi_shared.cpp

@@ -59,9 +59,10 @@
 
 #if HAS_MARLINUI_U8GLIB
 
+#include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"
 
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
 #include "u8g_com_HAL_DUE_sw_spi_shared.h"
 
@@ -80,7 +81,7 @@ Pio *SCK_pPio, *MOSI_pPio;
 uint32_t SCK_dwMask, MOSI_dwMask;
 
 void u8g_spiSend_sw_DUE_mode_0(uint8_t val) { // 3MHz
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; ++i) {
     if (val & 0x80)
       MOSI_pPio->PIO_SODR = MOSI_dwMask;
     else
@@ -94,7 +95,7 @@ void u8g_spiSend_sw_DUE_mode_0(uint8_t val) { // 3MHz
 }
 
 void u8g_spiSend_sw_DUE_mode_3(uint8_t val) { // 3.5MHz
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; ++i) {
     SCK_pPio->PIO_CODR = SCK_dwMask;
     DELAY_NS(50);
     if (val & 0x80)

Marlin/src/HAL/DUE/u8g/u8g_com_HAL_DUE_sw_spi_shared.h

@@ -23,7 +23,7 @@
 
 #include "../../../inc/MarlinConfigPre.h"
 #include "../../shared/Marduino.h"
-#include <U8glib.h>
+#include <U8glib-HAL.h>
 
 void u8g_SetPIOutput_DUE(u8g_t *u8g, uint8_t pin_index);
 void u8g_SetPILevel_DUE(u8g_t *u8g, uint8_t pin_index, uint8_t level);

Marlin/src/HAL/DUE/upload_extra_script.py

@@ -4,15 +4,16 @@
 #  Windows: bossac.exe
 #  Other: leave unchanged
 #
+import pioutil
+if pioutil.is_pio_build():
+    import platform
+    current_OS = platform.system()
 
-import platform
-current_OS = platform.system()
+    if current_OS == 'Windows':
 
-if current_OS == 'Windows':
+        Import("env")
 
-	Import("env")
-
-	# Use bossac.exe on Windows
-	env.Replace(
-	    UPLOADCMD="bossac --info --unlock --write --verify --reset --erase -U false --boot $SOURCE"
-	)
+        # Use bossac.exe on Windows
+        env.Replace(
+            UPLOADCMD="bossac --info --unlock --write --verify --reset --erase -U false --boot $SOURCE"
+        )

Marlin/src/HAL/DUE/usb/README.md

@@ -0,0 +1,29 @@
+# USB Files Source Documentation
+
+## Source
+
+We sourced the USB files in Marlin from the Atmel ASF (Advanced Software Framework). The framework provides a variety of examples which were utilized in this project.
+
+Atmel doesn't provide these files in a source repository but they can be extracted from ASF, which can be downloaded from Atmel.
+
+[Advanced Software Framework](https://www.microchip.com/en-us/tools-resources/develop/libraries/advanced-software-framework)
+
+## Modifications
+
+The files are mostly unmodified except for minor cosmetic changes but some more significant changes were needed.
+
+The changes that prompted the addition of this README file are listed below. Other changes may have been made prior to this.
+
+1. Modified `uotghs_device_due.c` to resolve race conditions that could leave interrupts asserted when freezing the peripheral clock, resulting in hangs and watchdog resets due to the ensuing interrupt storm.
+
+## Version Information
+
+We don't know the exact version of ASF used as the source. However, the copyright information in the files indicates they are from 2015.
+
+## Upgrade Considerations
+
+We looked at the ASF 3.52.0 files released in 2022 but saw no immediate benefits to justify an upgrade. It's important to note that the files in Marlin don't follow the same folder structure as the files in ASF, which complicates the process of comparing and applying updated files.
+
+When these files are updated it's important to carefully compare them to Marlin's versions so any improvements in the Marlin sources are brought forward.
+
+It would be best to make Marlin's directory structure align with ASF or at least document the source of each file to ease future updates.

Marlin/src/HAL/DUE/usb/arduino_due_x.h

@@ -71,7 +71,7 @@
 /* ------------------------------------------------------------------------ */
 
 /**
- * \page arduino_due_x_board_info "Arduino Due/X - Board informations"
+ * \page arduino_due_x_board_info "Arduino Due/X - Board information"
  * This page lists several definition related to the board description.
  *
  */

Marlin/src/HAL/DUE/usb/compiler.h

@@ -142,7 +142,6 @@
  */
 #define COMPILER_PACK_RESET()          COMPILER_PRAGMA(pack())
 
-
 /**
  * \brief Set aligned boundary.
  */
@@ -283,7 +282,6 @@ typedef double                  F64;  //!< 64-bit floating-point number.
 typedef uint32_t                iram_size_t;
 //! @}
 
-
 /*! \name Status Types
  */
 //! @{
@@ -291,7 +289,6 @@ typedef bool                Status_bool_t;  //!< Boolean status.
 typedef U8                  Status_t;       //!< 8-bit-coded status.
 //! @}
 
-
 /*! \name Aliasing Aggregate Types
  */
 //! @{
@@ -462,7 +459,6 @@ typedef struct
 #endif
 //! @}
 
-
 #ifndef __ASSEMBLY__ // not for assembling.
 
 //! \name Optimization Control
@@ -581,7 +577,6 @@ typedef struct
 
 //! @}
 
-
 /*! \name Zero-Bit Counting
  *
  * Under GCC, __builtin_clz and __builtin_ctz behave like macros when
@@ -609,37 +604,37 @@ typedef struct
 #   define clz(u)              ((u) ? __CLZ(u) : 32)
 #else
 #   define clz(u)              (((u) == 0)          ? 32 : \
-                                ((u) & (1ul << 31)) ?  0 : \
-                                ((u) & (1ul << 30)) ?  1 : \
-                                ((u) & (1ul << 29)) ?  2 : \
-                                ((u) & (1ul << 28)) ?  3 : \
-                                ((u) & (1ul << 27)) ?  4 : \
-                                ((u) & (1ul << 26)) ?  5 : \
-                                ((u) & (1ul << 25)) ?  6 : \
-                                ((u) & (1ul << 24)) ?  7 : \
-                                ((u) & (1ul << 23)) ?  8 : \
-                                ((u) & (1ul << 22)) ?  9 : \
-                                ((u) & (1ul << 21)) ? 10 : \
-                                ((u) & (1ul << 20)) ? 11 : \
-                                ((u) & (1ul << 19)) ? 12 : \
-                                ((u) & (1ul << 18)) ? 13 : \
-                                ((u) & (1ul << 17)) ? 14 : \
-                                ((u) & (1ul << 16)) ? 15 : \
-                                ((u) & (1ul << 15)) ? 16 : \
-                                ((u) & (1ul << 14)) ? 17 : \
-                                ((u) & (1ul << 13)) ? 18 : \
-                                ((u) & (1ul << 12)) ? 19 : \
-                                ((u) & (1ul << 11)) ? 20 : \
-                                ((u) & (1ul << 10)) ? 21 : \
-                                ((u) & (1ul <<  9)) ? 22 : \
-                                ((u) & (1ul <<  8)) ? 23 : \
-                                ((u) & (1ul <<  7)) ? 24 : \
-                                ((u) & (1ul <<  6)) ? 25 : \
-                                ((u) & (1ul <<  5)) ? 26 : \
-                                ((u) & (1ul <<  4)) ? 27 : \
-                                ((u) & (1ul <<  3)) ? 28 : \
-                                ((u) & (1ul <<  2)) ? 29 : \
-                                ((u) & (1ul <<  1)) ? 30 : \
+                                ((u) & (1UL << 31)) ?  0 : \
+                                ((u) & (1UL << 30)) ?  1 : \
+                                ((u) & (1UL << 29)) ?  2 : \
+                                ((u) & (1UL << 28)) ?  3 : \
+                                ((u) & (1UL << 27)) ?  4 : \
+                                ((u) & (1UL << 26)) ?  5 : \
+                                ((u) & (1UL << 25)) ?  6 : \
+                                ((u) & (1UL << 24)) ?  7 : \
+                                ((u) & (1UL << 23)) ?  8 : \
+                                ((u) & (1UL << 22)) ?  9 : \
+                                ((u) & (1UL << 21)) ? 10 : \
+                                ((u) & (1UL << 20)) ? 11 : \
+                                ((u) & (1UL << 19)) ? 12 : \
+                                ((u) & (1UL << 18)) ? 13 : \
+                                ((u) & (1UL << 17)) ? 14 : \
+                                ((u) & (1UL << 16)) ? 15 : \
+                                ((u) & (1UL << 15)) ? 16 : \
+                                ((u) & (1UL << 14)) ? 17 : \
+                                ((u) & (1UL << 13)) ? 18 : \
+                                ((u) & (1UL << 12)) ? 19 : \
+                                ((u) & (1UL << 11)) ? 20 : \
+                                ((u) & (1UL << 10)) ? 21 : \
+                                ((u) & (1UL <<  9)) ? 22 : \
+                                ((u) & (1UL <<  8)) ? 23 : \
+                                ((u) & (1UL <<  7)) ? 24 : \
+                                ((u) & (1UL <<  6)) ? 25 : \
+                                ((u) & (1UL <<  5)) ? 26 : \
+                                ((u) & (1UL <<  4)) ? 27 : \
+                                ((u) & (1UL <<  3)) ? 28 : \
+                                ((u) & (1UL <<  2)) ? 29 : \
+                                ((u) & (1UL <<  1)) ? 30 : \
                                 31)
 #endif
 #endif
@@ -654,45 +649,44 @@ typedef struct
 #if (defined __GNUC__) || (defined __CC_ARM)
 #   define ctz(u)              ((u) ? __builtin_ctz(u) : 32)
 #else
-#   define ctz(u)              ((u) & (1ul <<  0) ?  0 : \
-                                (u) & (1ul <<  1) ?  1 : \
-                                (u) & (1ul <<  2) ?  2 : \
-                                (u) & (1ul <<  3) ?  3 : \
-                                (u) & (1ul <<  4) ?  4 : \
-                                (u) & (1ul <<  5) ?  5 : \
-                                (u) & (1ul <<  6) ?  6 : \
-                                (u) & (1ul <<  7) ?  7 : \
-                                (u) & (1ul <<  8) ?  8 : \
-                                (u) & (1ul <<  9) ?  9 : \
-                                (u) & (1ul << 10) ? 10 : \
-                                (u) & (1ul << 11) ? 11 : \
-                                (u) & (1ul << 12) ? 12 : \
-                                (u) & (1ul << 13) ? 13 : \
-                                (u) & (1ul << 14) ? 14 : \
-                                (u) & (1ul << 15) ? 15 : \
-                                (u) & (1ul << 16) ? 16 : \
-                                (u) & (1ul << 17) ? 17 : \
-                                (u) & (1ul << 18) ? 18 : \
-                                (u) & (1ul << 19) ? 19 : \
-                                (u) & (1ul << 20) ? 20 : \
-                                (u) & (1ul << 21) ? 21 : \
-                                (u) & (1ul << 22) ? 22 : \
-                                (u) & (1ul << 23) ? 23 : \
-                                (u) & (1ul << 24) ? 24 : \
-                                (u) & (1ul << 25) ? 25 : \
-                                (u) & (1ul << 26) ? 26 : \
-                                (u) & (1ul << 27) ? 27 : \
-                                (u) & (1ul << 28) ? 28 : \
-                                (u) & (1ul << 29) ? 29 : \
-                                (u) & (1ul << 30) ? 30 : \
-                                (u) & (1ul << 31) ? 31 : \
+#   define ctz(u)              ((u) & (1UL <<  0) ?  0 : \
+                                (u) & (1UL <<  1) ?  1 : \
+                                (u) & (1UL <<  2) ?  2 : \
+                                (u) & (1UL <<  3) ?  3 : \
+                                (u) & (1UL <<  4) ?  4 : \
+                                (u) & (1UL <<  5) ?  5 : \
+                                (u) & (1UL <<  6) ?  6 : \
+                                (u) & (1UL <<  7) ?  7 : \
+                                (u) & (1UL <<  8) ?  8 : \
+                                (u) & (1UL <<  9) ?  9 : \
+                                (u) & (1UL << 10) ? 10 : \
+                                (u) & (1UL << 11) ? 11 : \
+                                (u) & (1UL << 12) ? 12 : \
+                                (u) & (1UL << 13) ? 13 : \
+                                (u) & (1UL << 14) ? 14 : \
+                                (u) & (1UL << 15) ? 15 : \
+                                (u) & (1UL << 16) ? 16 : \
+                                (u) & (1UL << 17) ? 17 : \
+                                (u) & (1UL << 18) ? 18 : \
+                                (u) & (1UL << 19) ? 19 : \
+                                (u) & (1UL << 20) ? 20 : \
+                                (u) & (1UL << 21) ? 21 : \
+                                (u) & (1UL << 22) ? 22 : \
+                                (u) & (1UL << 23) ? 23 : \
+                                (u) & (1UL << 24) ? 24 : \
+                                (u) & (1UL << 25) ? 25 : \
+                                (u) & (1UL << 26) ? 26 : \
+                                (u) & (1UL << 27) ? 27 : \
+                                (u) & (1UL << 28) ? 28 : \
+                                (u) & (1UL << 29) ? 29 : \
+                                (u) & (1UL << 30) ? 30 : \
+                                (u) & (1UL << 31) ? 31 : \
                                 32)
 #endif
 #endif
 
 //! @}
 
-
 /*! \name Bit Reversing
  */
 //! @{
@@ -732,7 +726,6 @@ typedef struct
 
 //! @}
 
-
 /*! \name Alignment
  */
 //! @{
@@ -798,7 +791,6 @@ typedef struct
  */
 #define Long_call(addr)                   ((*(void (*)(void))(addr))())
 
-
 /*! \name MCU Endianism Handling
  * ARM is MCU little endianism.
  */
@@ -868,7 +860,6 @@ typedef struct
 #define  CPU_TO_BE32(x) swap32(x)
 //! @}
 
-
 /*! \name Endianism Conversion
  *
  * The same considerations as for clz and ctz apply here but GCC's
@@ -955,7 +946,6 @@ typedef struct
 
 //! @}
 
-
 /*! \name Target Abstraction
  */
 //! @{
@@ -997,7 +987,6 @@ typedef U8                  Byte;       //!< 8-bit unsigned integer.
 
 #endif  // #ifndef __ASSEMBLY__
 
-
 #ifdef __ICCARM__
 #define SHORTENUM           __packed
 #elif defined(__GNUC__)
@@ -1059,7 +1048,7 @@ static inline void convert_64_bit_to_byte_array(uint64_t value, uint8_t *data)
     while (val_index < 8)
     {
         data[val_index++] = value & 0xFF;
-        value = value >> 8;
+        value >>= 8;
     }
 }
 

Marlin/src/HAL/DUE/usb/conf_access.h

@@ -81,7 +81,6 @@
 #define LUN_0_NAME                              "\"SD/MMC Card\""
 //! @}
 
-
 /*! \name Actions Associated with Memory Accesses
  *
  * Write here the action to associate with each memory access.
@@ -112,5 +111,4 @@
 #define GLOBAL_WR_PROTECT    false   //!< Management of a global write protection.
 //! @}
 
-
 #endif // _CONF_ACCESS_H_