Merge remote-tracking branch 'upstream/bugfix-2.1.x' into pr/26944

w/r/t https://github.com/MarlinFirmware/Marlin/issues/27918#issuecomment-3145339116

.aiderignore

@@ -0,0 +1,21 @@
+# Build artifacts
+buildroot/
+*.o
+*.a
+*.so
+*.dylib
+*.dll
+*.exe
+
+# Web assets
+*.min.js
+*.min.css
+
+# Generated files
+__pycache__/
+*.pyc
+.DS_Store
+
+# IDE files
+.vscode/
+.idea/

.devcontainer/devcontainer.json

@@ -38,14 +38,14 @@
     "platformio.platformio-ide",
     "marlinfirmware.auto-build",
     "editorconfig.editorconfig"
-  ],
+  ]
 
   // Use 'forwardPorts' to make a list of ports inside the container available locally.
-  // "forwardPorts": [],
+  // , "forwardPorts": []
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  // "postCreateCommand": "pip3 install --user -r requirements.txt",
+  // , "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"
+  // , "remoteUser": "vscode"
 }

.github/workflows/auto-label.yml

@@ -14,7 +14,7 @@ jobs:
   autolabel:
     name: Auto Label
     if: github.repository == 'MarlinFirmware/Marlin'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - name: Auto Label for [BUG]
       uses: actions/github-script@v7

.github/workflows/bump-date.yml

@@ -14,7 +14,7 @@ jobs:
     name: Bump Distribution Date
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
 

.github/workflows/check-pr.yml

@@ -18,7 +18,7 @@ jobs:
     name: PR Bad Target
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: superbrothers/close-pull-request@v3

.github/workflows/ci-build-tests.yml

@@ -21,6 +21,7 @@ on:
     branches:
     - bugfix-2.1.x
     - 2.1.x
+    - release-*
     paths-ignore:
     - config/**
     - data/**
@@ -34,13 +35,19 @@ jobs:
     name: Build Test
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
+
+    env:
+      CONFIG_BRANCH: ${{ github.base_ref || github.ref_name }}
 
     strategy:
       fail-fast: true
       matrix:
         test-platform:
 
+        # RP2040
+        - SKR_Pico
+
         # Native
         - linux_native
         - simulator_linux_release
@@ -51,7 +58,7 @@ jobs:
         - at90usb1286_dfu
 
         # AVR Extended
-        - FYSETC_F6
+        - mega2560ext
         - melzi_optiboot
         - rambo
         - sanguino1284p
@@ -110,7 +117,7 @@ jobs:
         - BTT_GTR_V1_0
         - BTT_SKR_PRO
         - FLYF407ZG
-        - FYSETC_S6
+        - STM32F446VE_fysetc
         - LERDGEK
         - LERDGEX
         - mks_robin_pro2
@@ -148,6 +155,12 @@ jobs:
         # HC32
         - HC32F460C_aquila_101
 
+        # GD32F3
+        - GD32F303RE_creality_mfl
+
+        # GD32F1
+        - GD32F103RC_aquila_mfl
+
         # LPC176x - Lengthy tests
         - LPC1768
         - LPC1769
@@ -161,15 +174,20 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        key: ${{ runner.os }}-pip-build-v1
         restore-keys: |
-          ${{ runner.os }}-pip-
+          ${{ runner.os }}-pip-build-
 
     - name: Cache PlatformIO
       uses: actions/cache@v4
       with:
-        path: ~/.platformio
-        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+        path: |
+          ~/.platformio
+          .pio/build
+          .pio/libdeps
+        key: ${{ runner.os }}-pio-build-v1
+        restore-keys: |
+          ${{ runner.os }}-pio-build-
 
     - name: Select Python 3.9
       uses: actions/setup-python@v5
@@ -185,6 +203,7 @@ jobs:
 
     - name: Install Simulator dependencies
       run: |
+        sudo apt-get update
         sudo apt-get install build-essential
         sudo apt-get install libsdl2-dev
         sudo apt-get install libsdl2-net-dev

.github/workflows/ci-unit-tests.yml

@@ -36,7 +36,7 @@ jobs:
     # pulls them into additional branches.
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Check out the PR
@@ -46,15 +46,20 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        key: ${{ runner.os }}-pip-unit-v1
         restore-keys: |
-          ${{ runner.os }}-pip-
+          ${{ runner.os }}-pip-unit-
 
     - name: Cache PlatformIO
       uses: actions/cache@v4
       with:
-        path: ~/.platformio
-        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+        path: |
+          ~/.platformio
+          .pio/build
+          .pio/libdeps
+        key: ${{ runner.os }}-pio-tests-v1
+        restore-keys: |
+          ${{ runner.os }}-pio-tests-
 
     - name: Select Python 3.9
       uses: actions/setup-python@v5

.github/workflows/ci-validate-boards.yml

@@ -0,0 +1,48 @@
+#
+# ci-validate-boards.yml
+# Validate boards.h to make sure it's all set up correctly
+#
+
+name: CI - Validate boards.h
+
+# We can do the on: section as two items, one for pull requests and one for pushes...
+on:
+  pull_request:
+    branches:
+      - bugfix-2.1.x
+    paths:
+      - "Marlin/src/core/boards.h"
+  push:
+    branches:
+      - bugfix-2.1.x
+    paths:
+      - "Marlin/src/core/boards.h"
+
+jobs:
+  validate_pins_files:
+    name: Validate boards.h
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Check out the PR
+        uses: actions/checkout@v4
+
+      - name: Cache pip
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-validation-v1
+          restore-keys: |
+            ${{ runner.os }}-pip-validation-
+
+      - name: Select Python 3.9
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.9"
+          architecture: "x64"
+
+      - name: Validate core/boards.h
+        run: |
+          make validate-boards -j

.github/workflows/ci-validate-lines.yml

@@ -0,0 +1,40 @@
+#
+# ci-validate-lines.yml
+# Validate that all text files are unchanged by linesformat.py
+#
+
+name: CI - Validate Source Files
+
+on:
+  pull_request:
+    branches:
+      - bugfix-2.1.x
+      - 2.1.x
+  push:
+    branches:
+      - bugfix-2.1.x
+      - 2.1.x
+
+jobs:
+  validate_source_files:
+    name: Validate Source Files
+    if: github.repository == 'MarlinFirmware/Marlin'
+
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Check out the PR
+        uses: actions/checkout@v4
+
+      - name: Cache node_modules
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-npm-lines-v1
+          restore-keys: |
+            ${{ runner.os }}-npm-lines-
+
+      - name: Validate text file formatting
+        run: |
+          npm install --save-dev prettier
+          make validate-lines -j

.github/workflows/ci-validate-pins.yml

@@ -8,44 +8,44 @@ name: CI - Validate Pins Files
 on:
   pull_request:
     branches:
-    - bugfix-2.1.x
+      - bugfix-2.1.x
     # Cannot be enabled on 2.1.x until it contains the unit test framework
     #- 2.1.x
     paths:
-    - 'Marlin/src/pins/*/**'
+      - "Marlin/src/pins/*/**"
   push:
     branches:
-    - bugfix-2.1.x
+      - bugfix-2.1.x
     # Cannot be enabled on 2.1.x until it contains the unit test framework
     #- 2.1.x
     paths:
-    - 'Marlin/src/pins/*/**'
+      - "Marlin/src/pins/*/**"
 
 jobs:
   validate_pins_files:
     name: Validate Pins Files
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
-    - name: Check out the PR
-      uses: actions/checkout@v4
+      - name: Check out the PR
+        uses: actions/checkout@v4
 
-    - name: Cache pip
-      uses: actions/cache@v4
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
+      - name: Cache pip
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-validation-v1
+          restore-keys: |
+            ${{ runner.os }}-pip-validation-
 
-    - name: Select Python 3.9
-      uses: actions/setup-python@v5
-      with:
-        python-version: '3.9'
-        architecture: 'x64'
+      - name: Select Python 3.9
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.9"
+          architecture: "x64"
 
-    - name: Validate all pins files
-      run: |
-        make validate-pins -j
+      - name: Validate all pins files
+        run: |
+          make validate-pins -j

.github/workflows/clean-closed.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   remove_label:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:

.github/workflows/close-stale.yml

@@ -14,7 +14,7 @@ jobs:
     name: Close Stale Issues
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/stale@v9

.github/workflows/lock-closed.yml

@@ -14,7 +14,7 @@ jobs:
     name: Lock Closed Issues
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: dessant/lock-threads@v5

.github/workflows/unlock-reopened.yml

@@ -14,7 +14,7 @@ jobs:
     name: Unlock Reopened
     if: github.repository == 'MarlinFirmware/Marlin'
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: OSDKDev/unlock-issues@v1.1

.github/workflows/update-base-configs.yml

@@ -1,27 +0,0 @@
-#
-# update-base-configs.yml
-# Generate new base config files if needed
-#
-
-name: Update Base Configs
-
-on:
-  schedule:
-    - cron: '0 */6 * * *'
-
-jobs:
-  bump_date:
-    name: Update Base Configs
-    if: github.repository == 'MarlinFirmware/Marlin'
-
-    runs-on: ubuntu-latest
-
-    steps:
-
-    - name: Checkout bugfix-2.1.x
-      uses: actions/checkout@v4
-      with:
-        ref: bugfix-2.1.x
-
-    - name: Update Base Configs
-      run: make base-configs

.gitignore

@@ -31,6 +31,11 @@ out-language/
 *.gen
 *.sublime-workspace
 
+# npm
+node_modules/
+package.json
+package-lock.json
+
 # OS
 applet/
 .DS_Store
@@ -169,3 +174,6 @@ __pycache__
 tags
 *.logs
 *.bak
+.aider*
+!.aiderignore
+.env

.prettierignore

@@ -0,0 +1,10 @@
+# Prettier Ignore file
+*.min.js
+web-ui/
+buildroot/share/PlatformIO/boards
+buildroot/share/PlatformIO/variants
+*.sublime-project
+*.sublime-syntax
+.github
+.vscode
+launch.json

.zed/settings.json

@@ -0,0 +1,16 @@
+/**
+ * Marlin-specific settings for Zed
+ *
+ * For a full list of overridable settings, and general information on folder-specific settings,
+ * see the documentation: https://zed.dev/docs/configuring-zed#settings-files
+ */
+{
+  "languages": {
+    "C": {
+      "enable_language_server": false
+    },
+    "C++": {
+      "enable_language_server": false
+    }
+  }
+}

Makefile

@@ -4,12 +4,38 @@ CONTAINER_RT_OPTS := --rm -v $(PWD):/code -v platformio-cache:/root/.platformio
 CONTAINER_IMAGE := marlin-dev
 UNIT_TEST_CONFIG ?= default
 
+# Find a Python 3 interpreter
+ifeq ($(OS),Windows_NT)
+	# Windows: use `where` – fall back through the three common names
+	PYTHON := $(shell which python 2>nul || which python3 2>nul || which py 2>nul)
+	# Windows: Use cmd tools to find pins files
+	PINS_RAW := $(shell cmd //c "dir /s /b Marlin\src\pins\*.h 2>nul | findstr /r ".*Marlin\\\\src\\\\pins\\\\.*\\\\pins_.*\.h"")
+	PINS := $(subst \,/,$(PINS_RAW))
+else
+	# POSIX: use `command -v` – prefer python3 over python
+	PYTHON := $(shell command -v python3 2>/dev/null || command -v python 2>/dev/null)
+	# Unix/Linux: Use find command
+	PINS := $(shell find Marlin/src/pins -mindepth 2 -name 'pins_*.h')
+endif
+
+# Check that the found interpreter is Python 3
+# Error if there's no Python 3 available
+ifneq ($(strip $(PYTHON)),)
+	PYTHON_VERSION := $(shell $(PYTHON) -c "import sys; print(sys.version_info[0])" 2>/dev/null)
+	ifneq ($(PYTHON_VERSION),3)
+		$(error $(PYTHON) is not Python 3 – install a Python‑3.x interpreter or adjust your PATH)
+	endif
+else
+	$(error No Python executable found – install Python 3.x and make sure it is in your PATH)
+endif
+
 help:
 	@echo "Tasks for local development:"
-	@echo "make marlin                    : Build marlin for the configured board"
+	@echo "make marlin                    : Build Marlin for the configured board"
 	@echo "make format-pins -j            : Reformat all pins files (-j for parallel execution)"
+	@echo "make validate-lines -j         : Validate line endings, fails on trailing whitespace, etc."
 	@echo "make validate-pins -j          : Validate all pins files, fails if any require reformatting"
-	@echo "make base-configs              : Regenerate the base configs in Marlin/src/inc"
+	@echo "make validate-boards -j        : Validate boards.h and pins.h for standards compliance"
 	@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"
@@ -17,9 +43,9 @@ help:
 	@echo "make tests-all-local-docker    : Run all tests locally, using docker"
 	@echo "make unit-test-single-local    : Run unit tests for a single config locally"
 	@echo "make unit-test-single-local-docker : Run unit tests for a single config locally, using docker"
-	@echo "make unit-test-all-local      : Run all code tests locally"
+	@echo "make unit-test-all-local       : Run all code tests locally"
 	@echo "make unit-test-all-local-docker : Run all code tests locally, using docker"
-	@echo "make setup-local-docker        : Setup local docker using buildx"
+	@echo "make setup-local-docker        : Setup local docker"
 	@echo ""
 	@echo "Options for testing:"
 	@echo "  TEST_TARGET          Set when running tests-single-*, to select the"
@@ -40,6 +66,9 @@ marlin:
 	./buildroot/bin/mftest -a
 .PHONY: marlin
 
+clean:
+	rm -rf .pio/build*
+
 tests-single-ci:
 	export GIT_RESET_HARD=true
 	$(MAKE) tests-single-local TEST_TARGET=$(TEST_TARGET) PLATFORMIO_BUILD_FLAGS=-DGITHUB_ACTION
@@ -56,10 +85,10 @@ tests-single-local-docker:
 	$(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:
-	@python -c "import yaml" 2>/dev/null || (echo 'pyyaml module is not installed. Install it with "python -m pip install pyyaml"' && exit 1)
+	@$(PYTHON) -c "import yaml" 2>/dev/null || (echo 'pyyaml module is not installed. Install it with "$(PYTHON) -m pip install pyyaml"' && exit 1)
 	export PATH="./buildroot/bin/:./buildroot/tests/:${PATH}" \
 	  && export VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) \
-	  && for TEST_TARGET in $$(python $(SCRIPTS_DIR)/get_test_targets.py) ; do \
+	  && for TEST_TARGET in $$($(PYTHON) $(SCRIPTS_DIR)/get_test_targets.py) ; do \
 	    if [ "$$TEST_TARGET" = "linux_native" ] && [ "$$(uname)" = "Darwin" ]; then \
 	      echo "Skipping tests for $$TEST_TARGET on macOS" ; \
 	      continue ; \
@@ -87,25 +116,56 @@ unit-test-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 unit-test-all-local
 
-setup-local-docker:
-	$(CONTAINER_RT_BIN) buildx build -t $(CONTAINER_IMAGE) -f docker/Dockerfile .
+USERNAME := $(shell whoami)
+USER_ID  := $(shell id -u)
+GROUP_ID := $(shell id -g)
 
-PINS := $(shell find Marlin/src/pins -mindepth 2 -name '*.h')
+.PHONY: setup-local-docker setup-local-docker-old
+
+setup-local-docker:
+	@echo "Building marlin-dev Docker image..."
+	$(CONTAINER_RT_BIN) build -t $(CONTAINER_IMAGE) \
+	  --build-arg USERNAME=$(USERNAME) \
+	  --build-arg USER_ID=$(USER_ID) \
+	  --build-arg GROUP_ID=$(GROUP_ID) \
+	  -f docker/Dockerfile .
+	@echo
+	@echo "To run all tests in Docker:"
+	@echo "  make tests-all-local-docker"
+	@echo "To run a single test in Docker:"
+	@echo "  make tests-single-local-docker TEST_TARGET=mega2560"
+
+setup-local-docker-old:
+	$(CONTAINER_RT_BIN) buildx build -t $(CONTAINER_IMAGE) -f docker/Dockerfile .
 
 .PHONY: $(PINS) format-pins validate-pins
 
 $(PINS): %:
-	@echo "Formatting $@"
-	@python $(SCRIPTS_DIR)/pinsformat.py $< $@
+	@echo "Formatting pins $@"
+	@$(PYTHON) $(SCRIPTS_DIR)/pinsformat.py $< $@
 
 format-pins: $(PINS)
+	@echo "Processed $(words $(PINS)) pins files"
 
 validate-pins: format-pins
 	@echo "Validating pins files"
 	@git diff --exit-code || (git status && echo "\nError: Pins files are not formatted correctly. Run \"make format-pins\" to fix.\n" && exit 1)
 
-base-configs:
-	@echo "Generating base configs"
-	@python $(SCRIPTS_DIR)/makeBaseConfigs.py 2>/dev/null \
-	  && git add Marlin/src/inc/BaseConfiguration.h Marlin/src/inc/BaseConfiguration_adv.h \
-	  && git commit -m "[cron] Update Base Configurations"
+.PHONY: format-lines validate-lines
+
+format-lines:
+	@echo "Formatting all sources"
+	@$(PYTHON) $(SCRIPTS_DIR)/linesformat.py buildroot
+	@$(PYTHON) $(SCRIPTS_DIR)/linesformat.py Marlin
+
+validate-lines:
+	@echo "Validating text formatting"
+	@npx prettier --check . --editorconfig --object-wrap preserve
+
+BOARDS_FILE := Marlin/src/core/boards.h
+
+.PHONY: validate-boards
+
+validate-boards:
+	@echo "Validating boards.h file"
+	@$(PYTHON) $(SCRIPTS_DIR)/validate_boards.py $(BOARDS_FILE) || (echo "\nError: boards.h file is not valid. Please check and correct it.\n" && exit 1)

Marlin/Configuration.h

@@ -61,7 +61,7 @@
 // @section info
 
 // Author info of this build printed to the host during boot and M115
-#define STRING_CONFIG_H_AUTHOR "(none, default config)" // Who made the changes.
+#define STRING_CONFIG_H_AUTHOR "(none, default config)" // Original author or contributor.
 //#define CUSTOM_VERSION_FILE Version.h // Path from the root directory (no quotes)
 
 // @section machine
@@ -71,6 +71,8 @@
   #define MOTHERBOARD BOARD_RAMPS_14_EFB
 #endif
 
+// @section serial
+
 /**
  * Select the serial port on the board to use for communication with the host.
  * This allows the connection of wireless adapters (for instance) to non-default port pins.
@@ -127,6 +129,7 @@
 
 // Name displayed in the LCD "Ready" message and Info menu
 //#define CUSTOM_MACHINE_NAME "3D Printer"
+//#define CONFIGURABLE_MACHINE_NAME // Add G-code M550 to set/report the machine name
 
 // Printer's unique ID, used by some programs to differentiate between machines.
 // Choose your own or use a service like https://www.uuidgenerator.net/version4
@@ -145,9 +148,9 @@
  * Options: A4988, A5984, DRV8825, LV8729, TB6560, TB6600, TMC2100,
  *          TMC2130, TMC2130_STANDALONE, TMC2160, TMC2160_STANDALONE,
  *          TMC2208, TMC2208_STANDALONE, TMC2209, TMC2209_STANDALONE,
- *          TMC2660, TMC2660_STANDALONE, TMC5130, TMC5130_STANDALONE,
- *          TMC5160, TMC5160_STANDALONE
- * :['A4988', 'A5984', 'DRV8825', 'LV8729', 'TB6560', 'TB6600', 'TMC2100', 'TMC2130', 'TMC2130_STANDALONE', 'TMC2160', 'TMC2160_STANDALONE', 'TMC2208', 'TMC2208_STANDALONE', 'TMC2209', 'TMC2209_STANDALONE', 'TMC2660', 'TMC2660_STANDALONE', 'TMC5130', 'TMC5130_STANDALONE', 'TMC5160', 'TMC5160_STANDALONE']
+ *          TMC2240, TMC2660, TMC2660_STANDALONE,
+ *          TMC5130, TMC5130_STANDALONE, TMC5160, TMC5160_STANDALONE
+ * :['A4988', 'A5984', 'DRV8825', 'LV8729', 'TB6560', 'TB6600', 'TMC2100', 'TMC2130', 'TMC2130_STANDALONE', 'TMC2160', 'TMC2160_STANDALONE', 'TMC2208', 'TMC2208_STANDALONE', 'TMC2209', 'TMC2209_STANDALONE', 'TMC2240', 'TMC2660', 'TMC2660_STANDALONE', 'TMC5130', 'TMC5130_STANDALONE', 'TMC5160', 'TMC5160_STANDALONE']
  */
 #define X_DRIVER_TYPE  A4988
 #define Y_DRIVER_TYPE  A4988
@@ -257,6 +260,7 @@
   #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // A pair of angles for { E0, E1 }.
                                                     // For Dual Servo use two pairs: { { lower, raise }, { lower, raise } }
   #define SWITCHING_NOZZLE_SERVO_DWELL 2500         // Dwell time to wait for servo to make physical move
+  #define SWITCHING_NOZZLE_LIFT_TO_PROBE            // Lift toolheads out of the way while probing
 #endif
 
 // Switch nozzles by bumping the toolhead. Requires EVENT_GCODE_TOOLCHANGE_#.
@@ -301,6 +305,18 @@
 
 #endif
 
+/**
+ * Differential Extruder
+ *
+ * The X and E steppers work together to create a differential drive system.
+ * Simple  : E steps = X + E   ; X steps = X  (E drives a loop, X stays the same)
+ * Balanced: E steps = X + E/2 ; X steps = X - E/2  (Dual loop system)
+ */
+//#define DIFFERENTIAL_EXTRUDER
+#if ENABLED(DIFFERENTIAL_EXTRUDER)
+  //#define BALANCED_DIFFERENTIAL_EXTRUDER
+#endif
+
 /**
  * Switching Toolhead
  *
@@ -584,7 +600,7 @@
 #define DUMMY_THERMISTOR_998_VALUE  25
 #define DUMMY_THERMISTOR_999_VALUE 100
 
-// Resistor values when using MAX31865 sensors (-5) on TEMP_SENSOR_0 / 1
+// Resistor values when using MAX31865 sensors (-5) on TEMP_SENSOR_0 / 1 / 2 / BED
 #if TEMP_SENSOR_IS_MAX_TC(0)
   #define MAX31865_SENSOR_OHMS_0      100 // (Ω) Typically 100 or 1000 (PT100 or PT1000)
   #define MAX31865_CALIBRATION_OHMS_0 430 // (Ω) Typically 430 for Adafruit PT100; 4300 for Adafruit PT1000
@@ -597,6 +613,10 @@
   #define MAX31865_SENSOR_OHMS_2      100
   #define MAX31865_CALIBRATION_OHMS_2 430
 #endif
+#if TEMP_SENSOR_IS_MAX_TC(BED)
+  #define MAX31865_SENSOR_OHMS_BED      100
+  #define MAX31865_CALIBRATION_OHMS_BED 430
+#endif
 
 #if HAS_E_TEMP_SENSOR
   #define TEMP_RESIDENCY_TIME         10  // (seconds) Time to wait for hotend to "settle" in M109
@@ -689,20 +709,22 @@
 #define PID_K1     0.95   // Smoothing factor within any PID loop
 
 #if ENABLED(PIDTEMP)
-  //#define PID_DEBUG             // Print PID debug data to the serial port. Use 'M303 D' to toggle activation.
+  //#define MIN_POWER 0           // Min power to improve PID stability (0..PID_MAX).
+                                  // Get the power from the temperature report ('M105' => @:nnn) and try P*2-20 to P*2-10.
+  //#define PID_DEBUG             // Print PID debug data to the serial port. Use 'M303 D' to enable/disable.
   //#define PID_PARAMS_PER_HOTEND // Use separate PID parameters for each extruder (useful for mismatched extruders)
                                   // Set/get with G-code: M301 E[extruder number, 0-2]
 
   #if ENABLED(PID_PARAMS_PER_HOTEND)
     // Specify up to one value per hotend here, according to your setup.
     // If there are fewer values, the last one applies to the remaining hotends.
-    #define DEFAULT_Kp_LIST {  22.20,  22.20 }
-    #define DEFAULT_Ki_LIST {   1.08,   1.08 }
-    #define DEFAULT_Kd_LIST { 114.00, 114.00 }
+    #define DEFAULT_KP_LIST {  22.20,  22.20 }
+    #define DEFAULT_KI_LIST {   1.08,   1.08 }
+    #define DEFAULT_KD_LIST { 114.00, 114.00 }
   #else
-    #define DEFAULT_Kp  22.20
-    #define DEFAULT_Ki   1.08
-    #define DEFAULT_Kd 114.00
+    #define DEFAULT_KP  22.20
+    #define DEFAULT_KI   1.08
+    #define DEFAULT_KD 114.00
   #endif
 #else
   #define BANG_MAX 255    // Limit hotend current while in bang-bang mode; 255=full current
@@ -725,7 +747,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 
@@ -757,6 +784,7 @@
 
   #define MPC_TUNING_POS { X_CENTER, Y_CENTER, 1.0f } // (mm) M306 Autotuning position, ideally bed center at first layer height.
   #define MPC_TUNING_END_Z 10.0f                      // (mm) M306 Autotuning final Z position.
+  //#define EVENT_GCODE_AFTER_MPC_TUNE "M84"          // G-code to execute after MPC tune finished and Z raised.
 #endif
 
 //===========================================================================
@@ -788,20 +816,55 @@
 //#define PIDTEMPBED
 
 #if ENABLED(PIDTEMPBED)
-  //#define MIN_BED_POWER 0
-  //#define PID_BED_DEBUG // Print Bed PID debug data to the serial port.
+  //#define MIN_BED_POWER 0   // Min power to improve PID stability (0..MAX_BED_POWER).
+                              // Get the power from the temperature report ('M105' => B@:nnn) and try P*2-20 to P*2-10.
+  //#define PID_BED_DEBUG     // Print Bed PID debug data to the serial port. Use 'M303 D' to enable/disable.
 
   // 120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   // from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)
-  #define DEFAULT_bedKp 10.00
-  #define DEFAULT_bedKi .023
-  #define DEFAULT_bedKd 305.4
+  #define DEFAULT_BED_KP  10.00
+  #define DEFAULT_BED_KI   0.023
+  #define DEFAULT_BED_KD 305.4
 
   // FIND YOUR OWN: "M303 E-1 C8 S90" to run autotune on the bed at 90 degreesC for 8 cycles.
 #else
   //#define BED_LIMIT_SWITCHING   // Keep the bed temperature within BED_HYSTERESIS of the target
 #endif
 
+/**
+ * Peltier Bed - Heating and Cooling
+ *
+ * A Peltier device transfers heat from one side to the other in proportion to the amount of
+ * current flowing through the device and the direction of current flow. So the same device
+ * can both heat and cool.
+ *
+ * When "cooling" in addition to rejecting the heat transferred from the hot side to the cold
+ * side, the dissipated power (voltage * current) must also be rejected. Be sure to set up a
+ * fan that can be powered in sync with the Peltier unit.
+ *
+ * This feature is only set up to run in bang-bang mode because Peltiers don't handle PWM
+ * well without filter circuitry.
+ *
+ * Since existing 3D printers are made to handle relatively high current for the heated bed,
+ * we can use the heated bed power pins to control the Peltier power using the same G-codes
+ * as the heated bed (M140, M190, etc.).
+ *
+ * A second GPIO pin is required to control current direction.
+ * Two configurations are possible: Relay and H-Bridge
+ *
+ * (At this time only relay is supported. H-bridge requires 4 MOS switches configured in H-Bridge.)
+ *
+ * Power is handled by the bang-bang control loop: 0 or 255.
+ * Cooling applications are more common than heating, so the pin states are commonly:
+ *   LOW  = Heating = Relay Energized
+ *   HIGH = Cooling = Relay in "Normal" state
+ */
+//#define PELTIER_BED
+#if ENABLED(PELTIER_BED)
+  #define PELTIER_DIR_PIN           -1  // Relay control pin for Peltier
+  #define PELTIER_DIR_HEAT_STATE   LOW  // The relay pin state that causes the Peltier to heat
+#endif
+
 // Add 'M190 R T' for more gradual M190 R bed cooling.
 //#define BED_ANNEALING_GCODE
 
@@ -836,15 +899,15 @@
 #define MAX_CHAMBER_POWER 255 // limits duty cycle to chamber heater; 255=full current
 
 #if ENABLED(PIDTEMPCHAMBER)
-  #define MIN_CHAMBER_POWER 0
-  //#define PID_CHAMBER_DEBUG // Print Chamber PID debug data to the serial port.
+  //#define MIN_CHAMBER_POWER 0 // Min power to improve PID stability. (0..MAX_CHAMBER_POWER)
+                                // Get the power from the temperature report ('M105' => C@:nnn) and try P*2-20 to P*2-10.
+  //#define PID_CHAMBER_DEBUG   // Print Chamber PID debug data to the serial port. Use 'M303 D' to enable/disable.
 
   // Lasko "MyHeat Personal Heater" (200w) modified with a Fotek SSR-10DA to control only the heating element
   // and placed inside the small Creality printer enclosure tent.
-  //
-  #define DEFAULT_chamberKp  37.04
-  #define DEFAULT_chamberKi   1.40
-  #define DEFAULT_chamberKd 655.17
+  #define DEFAULT_CHAMBER_KP  37.04
+  #define DEFAULT_CHAMBER_KI   1.40
+  #define DEFAULT_CHAMBER_KD 655.17
   // M309 P37.04 I1.04 D655.17
 
   // FIND YOUR OWN: "M303 E-2 C8 S50" to run autotune on the chamber at 50 degreesC for 8 cycles.
@@ -855,7 +918,7 @@
 #if ANY(PIDTEMP, PIDTEMPBED, PIDTEMPCHAMBER)
   //#define PID_OPENLOOP          // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX
   //#define SLOW_PWM_HEATERS      // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
-  #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature
+  #define PID_FUNCTIONAL_RANGE 20 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
 
   //#define PID_EDIT_MENU         // Add PID editing to the "Advanced Settings" menu. (~700 bytes of flash)
@@ -891,7 +954,7 @@
  * protect against a broken or disconnected thermistor wire.
  *
  * The issue: If a thermistor falls out, it will report the much lower
- * temperature of the air in the room, and the the firmware will keep
+ * temperature of the air in the room, and the firmware will keep
  * the heater on.
  *
  * If you get "Thermal Runaway" or "Heating failed" errors the
@@ -907,7 +970,7 @@
 //============================= Mechanical Settings =========================
 //===========================================================================
 
-// @section machine
+// @section kinematics
 
 // Enable one of the options below for CoreXY, CoreXZ, or CoreYZ kinematics,
 // either in the usual order or reversed
@@ -931,6 +994,15 @@
 // Enable for a belt style printer with endless "Z" motion
 //#define BELTPRINTER
 
+// Articulated robot (arm). Joints are directly mapped to axes with no kinematics.
+//#define ARTICULATED_ROBOT_ARM
+
+// For a hot wire cutter with parallel horizontal axes (X, I) where the heights of the two wire
+// ends are controlled by parallel axes (Y, J). Joints are directly mapped to axes (no kinematics).
+//#define FOAMCUTTER_XYUV
+
+// @section polargraph
+
 // Enable for Polargraph Kinematics
 //#define POLARGRAPH
 #if ENABLED(POLARGRAPH)
@@ -974,9 +1046,6 @@
   // Print surface diameter/2 minus unreachable space (avoid collisions with vertical towers).
   #define PRINTABLE_RADIUS       140.0    // (mm)
 
-  // Maximum reachable area
-  #define DELTA_MAX_RADIUS       140.0    // (mm)
-
   // Center-to-center distance of the holes in the diagonal push rods.
   #define DELTA_DIAGONAL_ROD 250.0        // (mm)
 
@@ -996,7 +1065,8 @@
   // Delta radius and diagonal rod adjustments
   //#define DELTA_RADIUS_TRIM_TOWER       { 0.0, 0.0, 0.0 } // (mm)
   //#define DELTA_DIAGONAL_ROD_TRIM_TOWER { 0.0, 0.0, 0.0 } // (mm)
-#endif
+
+#endif // DELTA
 
 // @section scara
 
@@ -1052,17 +1122,37 @@
   #define TPARA_LINKAGE_1 120     // (mm)
   #define TPARA_LINKAGE_2 120     // (mm)
 
-  // TPARA tower offset (position of Tower relative to bed zero position)
+  // Height of the Shoulder axis (pivot) relative to the tower floor
+  #define TPARA_SHOULDER_AXIS_HEIGHT 135.0     // (mm)
+
+  // The position of the last linkage relative to the robot arm origin
+  // (intersection of the base axis and floor) when at the home position
+  #define TPARA_ARM_X_HOME_POS  28.75  // (mm) Measured from shoulder axis to tool holder axis in home position
+  #define TPARA_ARM_Y_HOME_POS   0     // (mm)
+  #define TPARA_ARM_Z_HOME_POS 250.00  // (mm) Measured from tool holder axis to the floor
+
+  // TPARA Workspace offset relative to the tower (position of workspace origin relative to robot Tower origin )
   // This needs to be reasonably accurate as it defines the printbed position in the TPARA space.
-  #define TPARA_OFFSET_X    0     // (mm)
-  #define TPARA_OFFSET_Y    0     // (mm)
-  #define TPARA_OFFSET_Z    0     // (mm)
+  #define TPARA_OFFSET_X    127.0     // (mm) to coincide with minimum radius MIDDLE_DEAD_ZONE_R, and W(0,0,0) is reachable
+  #define TPARA_OFFSET_Y      0.0     // (mm)
+  #define TPARA_OFFSET_Z      0.0     // (mm)
+
+  // TPARA tool connection point offset, relative to the tool moving frame origin which is in the last linkage axis,
+  // (TCP: tool center/connection point) of the robot,
+  // the plane of measured offset must be alligned with home position plane
+  #define TPARA_TCP_OFFSET_X    27.0     // (mm) Tool flange: 27 (distance from pivot to bolt holes), extruder tool: 50.0,
+  #define TPARA_TCP_OFFSET_Y     0.0     // (mm)
+  #define TPARA_TCP_OFFSET_Z   -65.0     // (mm) Tool flange (bottom): -6 (caution as Z 0 posiion will crash second linkage to the floor, -35 is safe for testing with no tool), extruder tool (depends on extruder): -65.0
 
   #define FEEDRATE_SCALING        // Convert XY feedrate from mm/s to degrees/s on the fly
 
   // Radius around the center where the arm cannot reach
-  #define MIDDLE_DEAD_ZONE_R   0  // (mm)
-#endif
+  // For now use a hardcoded uniform limit, although it should be calculated, or fix a limit for each axis angle
+  #define MIDDLE_DEAD_ZONE_R   100    // (mm)
+
+  // Max angle between L1 and L2
+  #define TPARA_MAX_L1L2_ANGLE 140.0f // (degrees)
+#endif // AXEL_TPARA
 
 // @section polar
 
@@ -1117,15 +1207,6 @@
   #define FEEDRATE_SCALING                  // Convert XY feedrate from mm/s to degrees/s on the fly
 #endif
 
-// @section machine
-
-// Articulated robot (arm). Joints are directly mapped to axes with no kinematics.
-//#define ARTICULATED_ROBOT_ARM
-
-// For a hot wire cutter with parallel horizontal axes (X, I) where the heights of the two wire
-// ends are controlled by parallel axes (Y, J). Joints are directly mapped to axes (no kinematics).
-//#define FOAMCUTTER_XYUV
-
 //===========================================================================
 //============================== Endstop Settings ===========================
 //===========================================================================
@@ -1347,6 +1428,11 @@
  * See https://github.com/synthetos/TinyG/wiki/Jerk-Controlled-Motion-Explained
  */
 //#define S_CURVE_ACCELERATION
+#if ENABLED(S_CURVE_ACCELERATION)
+  // Define to use 4th instead of 6th order motion curve
+  //#define S_CURVE_FACTOR 0.25    // Initial and final acceleration factor, ideally 0.1 to 0.4.
+                                   // Shouldn't generally require tuning.
+#endif
 
 //===========================================================================
 //============================= Z Probe Options =============================
@@ -1471,7 +1557,6 @@
  * For information about this sensor https://github.com/bigtreetech/MicroProbe
  *
  * Also requires PROBE_ENABLE_DISABLE
- * With FT_MOTION requires ENDSTOP_INTERRUPTS_FEATURE
  */
 //#define BIQU_MICROPROBE_V1  // Triggers HIGH
 //#define BIQU_MICROPROBE_V2  // Triggers LOW
@@ -1499,6 +1584,20 @@
   #define PROBE_DEPLOY_FEEDRATE (133*60)  // (mm/min) Probe deploy speed
   #define PROBE_STOW_FEEDRATE   (133*60)  // (mm/min) Probe stow speed
 
+  /**
+   * Magnetically Mounted Probe with a Servo mechanism
+   * Probe Deploy and Stow both follow the same basic sequence:
+   *  - Rotate the SERVO to its Deployed angle
+   *  - Perform XYZ moves to deploy or stow the PROBE
+   *  - Rotate the SERVO to its Stowed angle
+   */
+  //#define MAG_MOUNTED_PROBE_SERVO_NR 0             // Servo Number for this probe
+  #ifdef MAG_MOUNTED_PROBE_SERVO_NR
+    #define MAG_MOUNTED_PROBE_SERVO_ANGLES { 90, 0 } // Servo Angles for Deployed, Stowed
+    #define MAG_MOUNTED_PRE_DEPLOY { PROBE_DEPLOY_FEEDRATE, { 15, 160, 30 } }  // Safe position for servo activation
+    #define MAG_MOUNTED_PRE_STOW   { PROBE_DEPLOY_FEEDRATE, { 15, 160, 30 } }  // Safe position for servo deactivation
+  #endif
+
   #define MAG_MOUNTED_DEPLOY_1 { PROBE_DEPLOY_FEEDRATE, { 245, 114, 30 } }  // Move to side Dock & Attach probe
   #define MAG_MOUNTED_DEPLOY_2 { PROBE_DEPLOY_FEEDRATE, { 210, 114, 30 } }  // Move probe off dock
   #define MAG_MOUNTED_DEPLOY_3 { PROBE_DEPLOY_FEEDRATE, {   0,   0,  0 } }  // Extra move if needed
@@ -1606,18 +1705,21 @@
   //#define PROBE_TOOLCHANGE_NO_MOVE  // Suppress motion on probe tool-change
 #endif
 
+//#define PROBE_WAKEUP_TIME_MS  30    // (ms) Time for the probe to wake up
+
 // Most probes should stay away from the edges of the bed, but
 // with NOZZLE_AS_PROBE this can be negative for a wider probing area.
 #define PROBING_MARGIN 10
 
-// X and Y axis travel speed (mm/min) between probes
-#define XY_PROBE_FEEDRATE (133*60)
+// X and Y axis travel speed between probes.
+// Leave undefined to use the average of the current XY homing feedrate.
+#define XY_PROBE_FEEDRATE    (133*60) // (mm/min)
 
-// Feedrate (mm/min) for the first approach when double-probing (MULTIPLE_PROBING == 2)
-#define Z_PROBE_FEEDRATE_FAST (4*60)
+// Feedrate for the first approach when double-probing (MULTIPLE_PROBING == 2)
+#define Z_PROBE_FEEDRATE_FAST  (4*60) // (mm/min)
 
-// Feedrate (mm/min) for the "accurate" probe of each point
-#define Z_PROBE_FEEDRATE_SLOW (Z_PROBE_FEEDRATE_FAST / 2)
+// Feedrate for the "accurate" probe of each point
+#define Z_PROBE_FEEDRATE_SLOW (Z_PROBE_FEEDRATE_FAST / 2) // (mm/min)
 
 /**
  * Probe Activation Switch
@@ -1679,8 +1781,8 @@
  * probe Z Offset set with NOZZLE_TO_PROBE_OFFSET, M851, or the LCD.
  * Only integer values >= 1 are valid here.
  *
- * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
- *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
+ * Example: 'M851 Z-5' with a CLEARANCE of 4  =>  9mm from bed to nozzle.
+ *     But: 'M851 Z+1' with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
 #define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
 #define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
@@ -1734,17 +1836,17 @@
 // @section stepper drivers
 
 // For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
-// :{ 0:'Low', 1:'High' }
-#define X_ENABLE_ON 0
-#define Y_ENABLE_ON 0
-#define Z_ENABLE_ON 0
-#define E_ENABLE_ON 0 // For all extruders
-//#define I_ENABLE_ON 0
-//#define J_ENABLE_ON 0
-//#define K_ENABLE_ON 0
-//#define U_ENABLE_ON 0
-//#define V_ENABLE_ON 0
-//#define W_ENABLE_ON 0
+// :['LOW', 'HIGH']
+#define X_ENABLE_ON LOW
+#define Y_ENABLE_ON LOW
+#define Z_ENABLE_ON LOW
+#define E_ENABLE_ON LOW // For all extruders
+//#define I_ENABLE_ON LOW
+//#define J_ENABLE_ON LOW
+//#define K_ENABLE_ON LOW
+//#define U_ENABLE_ON LOW
+//#define V_ENABLE_ON LOW
+//#define W_ENABLE_ON LOW
 
 // Disable axis steppers immediately when they're not being stepped.
 // WARNING: When motors turn off there is a chance of losing position accuracy!
@@ -1981,8 +2083,11 @@
     //#define FILAMENT_MOTION_SENSOR
 
     #if ENABLED(FILAMENT_MOTION_SENSOR)
-      //#define FILAMENT_SWITCH_AND_MOTION
+      //#define FILAMENT_SWITCH_AND_MOTION      // Define separate pins below to sense motion
       #if ENABLED(FILAMENT_SWITCH_AND_MOTION)
+
+        #define FILAMENT_MOTION_DISTANCE_MM 3.0 // (mm) Missing distance required to trigger runout
+
         #define NUM_MOTION_SENSORS   1          // Number of sensors, up to one per extruder. Define a FIL_MOTION#_PIN for each.
         //#define FIL_MOTION1_PIN    -1
 
@@ -2018,10 +2123,10 @@
         //#define FIL_MOTION8_STATE LOW
         //#define FIL_MOTION8_PULLUP
         //#define FIL_MOTION8_PULLDOWN
-      #endif
-    #endif
-  #endif
-#endif
+      #endif // FILAMENT_SWITCH_AND_MOTION
+    #endif // FILAMENT_MOTION_SENSOR
+  #endif // FILAMENT_RUNOUT_DISTANCE_MM
+#endif // FILAMENT_RUNOUT_SENSOR
 
 //===========================================================================
 //=============================== Bed Leveling ==============================
@@ -2067,6 +2172,12 @@
 //#define AUTO_BED_LEVELING_UBL
 //#define MESH_BED_LEVELING
 
+/**
+ * Commands to execute at the start of G29 probing,
+ * after switching to the PROBING_TOOL.
+ */
+//#define EVENT_GCODE_BEFORE_G29 "M300 P440 S200"
+
 /**
  * Commands to execute at the end of G29 probing.
  * Useful to retract or move the Z probe out of the way.
@@ -2215,7 +2326,7 @@
   //===========================================================================
 
   #define MESH_INSET 10          // Set Mesh bounds as an inset region of the bed
-  #define GRID_MAX_POINTS_X 3    // Don't use more than 7 points per axis, implementation limited.
+  #define GRID_MAX_POINTS_X 3
   #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X
 
   //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
@@ -2304,6 +2415,9 @@
 // Homing speeds (linear=mm/min, rotational=°/min)
 #define HOMING_FEEDRATE_MM_M { (50*60), (50*60), (4*60) }
 
+// Edit homing feedrates with M210 and MarlinUI menu items
+//#define EDITABLE_HOMING_FEEDRATE
+
 // Validate that endstops are triggered on homing moves
 #define VALIDATE_HOMING_ENDSTOPS
 
@@ -2848,13 +2962,15 @@
 //
 //#define MAKEBOARD_MINI_2_LINE_DISPLAY_1602
 
-//
-// ANET and Tronxy 20x4 Controller
-//
-//#define ZONESTAR_LCD            // Requires ADC_KEYPAD_PIN to be assigned to an analog pin.
-                                  // This LCD is known to be susceptible to electrical interference
-                                  // which scrambles the display.  Pressing any button clears it up.
-                                  // This is a LCD2004 display with 5 analog buttons.
+/**
+ * ANET and Tronxy 20x4 Controller
+ * LCD2004 display with 5 analog buttons.
+ *
+ * NOTE: Requires ADC_KEYPAD_PIN to be assigned to an analog pin.
+ * This LCD is known to be susceptible to electrical interference which
+ * scrambles the display. Press any button to clear it up.
+ */
+//#define ZONESTAR_LCD
 
 //
 // Generic 16x2, 16x4, 20x2, or 20x4 character-based LCD.
@@ -3042,7 +3158,7 @@
 
 //
 // FYSETC variant of the MINI12864 graphic controller with SD support
-// https://wiki.fysetc.com/Mini12864_Panel/
+// https://wiki.fysetc.com/docs/Mini12864Panel
 //
 //#define FYSETC_MINI_12864_X_X    // Type C/D/E/F. No tunable RGB Backlight by default
 //#define FYSETC_MINI_12864_1_2    // Type C/D/E/F. Simple RGB Backlight (always on)
@@ -3131,14 +3247,14 @@
 //
 // Tiny, but very sharp OLED display
 //
-//#define MKS_12864OLED          // Uses the SH1106 controller (default)
+//#define MKS_12864OLED          // Uses the SH1106 controller
 //#define MKS_12864OLED_SSD1306  // Uses the SSD1306 controller
 
 //
 // Zonestar OLED 128×64 Full Graphics Controller
 //
 //#define ZONESTAR_12864LCD           // Graphical (DOGM) with ST7920 controller
-//#define ZONESTAR_12864OLED          // 1.3" OLED with SH1106 controller (default)
+//#define ZONESTAR_12864OLED          // 1.3" OLED with SH1106 controller
 //#define ZONESTAR_12864OLED_SSD1306  // 0.96" OLED with SSD1306 controller
 
 //
@@ -3216,7 +3332,7 @@
 #endif
 
 //
-// Touch-screen LCD for Malyan M200/M300 printers
+// LCD for Malyan M200/M300 printers
 //
 //#define MALYAN_LCD
 
@@ -3244,6 +3360,11 @@
 //
 //#define ANYCUBIC_LCD_VYPER
 
+//
+// Sovol SV-06 Resistive Touch Screen
+//
+//#define SOVOL_SV06_RTS
+
 //
 // 320x240 Nextion 2.8" serial TFT Resistive Touch Screen NX3224T028
 //
@@ -3382,20 +3503,22 @@
 
 #if ENABLED(TFT_COLOR_UI)
   /**
-   * TFT Font for Color_UI. Choose one of the following:
+   * TFT Font for Color UI. Choose one of the following:
    *
    * NOTOSANS  - Default font with anti-aliasing. Supports Latin Extended and non-Latin characters.
    * UNIFONT   - Lightweight font, no anti-aliasing. Supports Latin Extended and non-Latin characters.
    * HELVETICA - Lightweight font, no anti-aliasing. Supports Basic Latin (0x0020-0x007F) and Latin-1 Supplement (0x0080-0x00FF) characters only.
+   * :['NOTOSANS', 'UNIFONT', 'HELVETICA']
    */
   #define TFT_FONT  NOTOSANS
 
   /**
-   * TFT Theme for Color_UI. Choose one of the following or add a new one to 'Marlin/src/lcd/tft/themes' directory
+   * TFT Theme for Color UI. Choose one of the following or add a new one to 'Marlin/src/lcd/tft/themes' directory
    *
    * BLUE_MARLIN  - Default theme with 'midnight blue' background
    * BLACK_MARLIN - Theme with 'black' background
    * ANET_BLACK   - Theme used for Anet ET4/5
+   * :['BLUE_MARLIN', 'BLACK_MARLIN', 'ANET_BLACK']
    */
   #define TFT_THEME BLACK_MARLIN
 
@@ -3415,6 +3538,8 @@
  *   TFT_ROTATE_180, TFT_ROTATE_180_MIRROR_X, TFT_ROTATE_180_MIRROR_Y,
  *   TFT_ROTATE_270, TFT_ROTATE_270_MIRROR_X, TFT_ROTATE_270_MIRROR_Y,
  *   TFT_MIRROR_X, TFT_MIRROR_Y, TFT_NO_ROTATION
+ *
+ * :{ 'TFT_NO_ROTATION':'None', 'TFT_ROTATE_90':'90°', 'TFT_ROTATE_90_MIRROR_X':'90° (Mirror X)', 'TFT_ROTATE_90_MIRROR_Y':'90° (Mirror Y)', 'TFT_ROTATE_180':'180°', 'TFT_ROTATE_180_MIRROR_X':'180° (Mirror X)', 'TFT_ROTATE_180_MIRROR_Y':'180° (Mirror Y)', 'TFT_ROTATE_270':'270°', 'TFT_ROTATE_270_MIRROR_X':'270° (Mirror X)', 'TFT_ROTATE_270_MIRROR_Y':'270° (Mirror Y)', 'TFT_MIRROR_X':'Mirror X', 'TFT_MIRROR_Y':'Mirror Y' }
  */
 //#define TFT_ROTATION TFT_NO_ROTATION
 
@@ -3431,6 +3556,11 @@
 //#define DWIN_MARLINUI_PORTRAIT      // MarlinUI (portrait orientation)
 //#define DWIN_MARLINUI_LANDSCAPE     // MarlinUI (landscape orientation)
 
+#if ENABLED(DWIN_CREALITY_LCD)
+  //#define USE_STRING_HEADINGS       // Use string headings for Creality UI instead of images
+  //#define USE_STRING_TITLES         // Use string titles for Creality UI instead of images
+#endif
+
 //
 // Touch Screen Settings
 //
@@ -3465,7 +3595,9 @@
 // https://reprapworld.com/products/electronics/ramps/keypad_v1_0_fully_assembled/
 //
 //#define REPRAPWORLD_KEYPAD
-//#define REPRAPWORLD_KEYPAD_MOVE_STEP 10.0 // (mm) Distance to move per key-press
+#if ENABLED(REPRAPWORLD_KEYPAD)
+  //#define REPRAPWORLD_KEYPAD_MOVE_STEP 10.0 // (mm) Distance to move per key-press
+#endif
 
 //
 // EasyThreeD ET-4000+ with button input and status LED
@@ -3482,22 +3614,26 @@
 // :[1,2,3,4,5,6,7,8]
 //#define NUM_M106_FANS 1
 
-// Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
-// which is not as annoying as with the hardware PWM. On the other hand, if this frequency
-// is too low, you should also increment SOFT_PWM_SCALE.
+/**
+ * Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
+ * which is not as annoying as with the hardware PWM. On the other hand, if this frequency
+ * is too low, you should also increment SOFT_PWM_SCALE.
+ */
 //#define FAN_SOFT_PWM
 
-// Incrementing this by 1 will double the software PWM frequency,
-// affecting heaters, and the fan if FAN_SOFT_PWM is enabled.
-// However, control resolution will be halved for each increment;
-// at zero value, there are 128 effective control positions.
-// :[0,1,2,3,4,5,6,7]
+/**
+ * Incrementing this by 1 will double the software PWM frequency, affecting heaters, and
+ * the fan if FAN_SOFT_PWM is enabled. However, control resolution will be halved for each
+ * increment; at zero value, there are 128 effective control positions.
+ * :[0,1,2,3,4,5,6,7]
+ */
 #define SOFT_PWM_SCALE 0
 
-// If SOFT_PWM_SCALE is set to a value higher than 0, dithering can
-// be used to mitigate the associated resolution loss. If enabled,
-// some of the PWM cycles are stretched so on average the desired
-// duty cycle is attained.
+/**
+ * If SOFT_PWM_SCALE is set to a value higher than 0, dithering can be used to mitigate the
+ * associated resolution loss. If enabled, some of the PWM cycles are stretched so on average
+ * the desired duty cycle is attained.
+ */
 //#define SOFT_PWM_DITHER
 
 // @section extras
@@ -3507,9 +3643,11 @@
 
 // @section lights
 
-// Temperature status LEDs that display the hotend and bed temperature.
-// If all hotends, bed temperature, and target temperature are under 54C
-// then the BLUE led is on. Otherwise the RED led is on. (1C hysteresis)
+/**
+ * Temperature status LEDs that display the hotend and bed temperature.
+ * If all hotends, bed temperature, and target temperature are under 54C
+ * the BLUE led is on. Otherwise the RED led is on. (1C hysteresis)
+ */
 //#define TEMP_STAT_LEDS
 
 // Support for BlinkM/CyzRgb

Marlin/Makefile

@@ -127,9 +127,9 @@ NEOPIXEL           ?= 0
 # on GCC versions:
 #   https://www.avrfreaks.net/comment/1789106#comment-1789106
 
-CC_MAJ:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC__ | cut -f3 -d\ )
-CC_MIN:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_MINOR__ | cut -f3 -d\ )
-CC_PATCHLEVEL:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_PATCHLEVEL__ | cut -f3 -d\ )
+CC_MAJ:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC__ | cut -f3 -d' ' )
+CC_MIN:=$(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)
   $(warning This GCC version $(CC_VER) is likely broken. Enabling relocation workaround.)
@@ -187,6 +187,17 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1033)
 # RAMPS Plus 3DYMY (Power outputs: Spindle, Controller Fan)
 else ifeq ($(HARDWARE_MOTHERBOARD),1034)
 
+# RAMPS 1.6+ (Power outputs: Hotend, Fan, Bed)
+else ifeq ($(HARDWARE_MOTHERBOARD),1040)
+# RAMPS 1.6+ (Power outputs: Hotend0, Hotend1, Bed)
+else ifeq ($(HARDWARE_MOTHERBOARD),1041)
+# RAMPS 1.6+ (Power outputs: Hotend, Fan0, Fan1)
+else ifeq ($(HARDWARE_MOTHERBOARD),1042)
+# RAMPS 1.6+ (Power outputs: Hotend0, Hotend1, Fan)
+else ifeq ($(HARDWARE_MOTHERBOARD),1043)
+# RAMPS 1.6+ (Power outputs: Spindle, Controller Fan)
+else ifeq ($(HARDWARE_MOTHERBOARD),1044)
+
 #
 # RAMPS Derivatives - ATmega1280, ATmega2560
 #
@@ -221,79 +232,79 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1112)
 else ifeq ($(HARDWARE_MOTHERBOARD),1113)
 # BigTreeTech or BIQU KFB2.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1114)
-# zrib V2.0 (Chinese RAMPS replica)
+# Zonestar zrib V2.0 (Chinese RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1115)
-# zrib V5.2 (Chinese RAMPS replica)
+# Zonestar zrib V5.2 (Chinese RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1116)
-# Felix 2.0+ Electronics Board (RAMPS like)
+# Zonestar zrib V5.3 (Chinese RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1117)
-# Invent-A-Part RigidBoard
+# Felix 2.0+ Electronics Board (RAMPS like)
 else ifeq ($(HARDWARE_MOTHERBOARD),1118)
-# Invent-A-Part RigidBoard V2
+# Invent-A-Part RigidBoard
 else ifeq ($(HARDWARE_MOTHERBOARD),1119)
-# Sainsmart 2-in-1 board
+# Invent-A-Part RigidBoard V2
 else ifeq ($(HARDWARE_MOTHERBOARD),1120)
-# Ultimaker
+# Sainsmart 2-in-1 board
 else ifeq ($(HARDWARE_MOTHERBOARD),1121)
-# Ultimaker (Older electronics. Pre 1.5.4. This is rare)
+# Ultimaker
 else ifeq ($(HARDWARE_MOTHERBOARD),1122)
+# Ultimaker (Older electronics. Pre 1.5.4. This is rare)
+else ifeq ($(HARDWARE_MOTHERBOARD),1123)
   MCU              ?= atmega1280
   PROG_MCU         ?= m1280
 # Azteeg X3
-else ifeq ($(HARDWARE_MOTHERBOARD),1123)
-# Azteeg X3 Pro
 else ifeq ($(HARDWARE_MOTHERBOARD),1124)
-# Ultimainboard 2.x (Uses TEMP_SENSOR 20)
+# Azteeg X3 Pro
 else ifeq ($(HARDWARE_MOTHERBOARD),1125)
-# Rumba
+# Ultimainboard 2.x (Uses TEMP_SENSOR 20)
 else ifeq ($(HARDWARE_MOTHERBOARD),1126)
-# Raise3D N series Rumba derivative
+# Rumba
 else ifeq ($(HARDWARE_MOTHERBOARD),1127)
-# Rapide Lite 200 (v1, low-cost RUMBA clone with drv)
+# Raise3D N series Rumba derivative
 else ifeq ($(HARDWARE_MOTHERBOARD),1128)
-# Formbot T-Rex 2 Plus
+# Rapide Lite 200 (v1, low-cost RUMBA clone with drv)
 else ifeq ($(HARDWARE_MOTHERBOARD),1129)
-# Formbot T-Rex 3
+# Formbot T-Rex 2 Plus
 else ifeq ($(HARDWARE_MOTHERBOARD),1130)
-# Formbot Raptor
+# Formbot T-Rex 3
 else ifeq ($(HARDWARE_MOTHERBOARD),1131)
-# Formbot Raptor 2
+# Formbot Raptor
 else ifeq ($(HARDWARE_MOTHERBOARD),1132)
-# bq ZUM Mega 3D
+# Formbot Raptor 2
 else ifeq ($(HARDWARE_MOTHERBOARD),1133)
-# MakeBoard Mini v2.1.2 by MicroMake
+# bq ZUM Mega 3D
 else ifeq ($(HARDWARE_MOTHERBOARD),1134)
-# TriGorilla Anycubic version 1.3-based on RAMPS EFB
+# MakeBoard Mini v2.1.2 by MicroMake
 else ifeq ($(HARDWARE_MOTHERBOARD),1135)
-#   ... Ver 1.4
+# TriGorilla Anycubic version 1.3-based on RAMPS EFB
 else ifeq ($(HARDWARE_MOTHERBOARD),1136)
-#   ... Rev 1.1 (new servo pin order)
+#   ... Ver 1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1137)
-# Creality: Ender-4, CR-8
+#   ... Rev 1.1 (new servo pin order)
 else ifeq ($(HARDWARE_MOTHERBOARD),1138)
-# Creality: CR10S, CR20, CR-X
+# Creality: Ender-4, CR-8
 else ifeq ($(HARDWARE_MOTHERBOARD),1139)
-# Dagoma F5
+# Creality: CR10S, CR20, CR-X
 else ifeq ($(HARDWARE_MOTHERBOARD),1140)
-# FYSETC F6 1.3
+# Creality CR-10 V2, CR-10 V3
 else ifeq ($(HARDWARE_MOTHERBOARD),1141)
-# FYSETC F6 1.4
+# Dagoma F5
 else ifeq ($(HARDWARE_MOTHERBOARD),1142)
-# Wanhao Duplicator i3 Plus
+# Dagoma D6 (as found in the Dagoma DiscoUltimate V2 TMC)
 else ifeq ($(HARDWARE_MOTHERBOARD),1143)
-# VORON Design
+# FYSETC F6 1.3
 else ifeq ($(HARDWARE_MOTHERBOARD),1144)
-# Tronxy TRONXY-V3-1.0
+# FYSETC F6 1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1145)
-# Z-Bolt X Series
+# Wanhao Duplicator i3 Plus
 else ifeq ($(HARDWARE_MOTHERBOARD),1146)
-# TT OSCAR
+# VORON Design
 else ifeq ($(HARDWARE_MOTHERBOARD),1147)
-# Overlord/Overlord Pro
+# Tronxy TRONXY-V3-1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1148)
-# ADIMLab Gantry v1
+# Z-Bolt X Series
 else ifeq ($(HARDWARE_MOTHERBOARD),1149)
-# ADIMLab Gantry v2
+# TT OSCAR
 else ifeq ($(HARDWARE_MOTHERBOARD),1150)
 # BIQU Tango V1
 else ifeq ($(HARDWARE_MOTHERBOARD),1151)
@@ -307,7 +318,7 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1154)
 else ifeq ($(HARDWARE_MOTHERBOARD),1155)
 # Tenlog D3 Hero IDEX printer
 else ifeq ($(HARDWARE_MOTHERBOARD),1156)
-# Tenlog D3,5,6 Pro IDEX printers
+# Tenlog D3, D5, D6 IDEX Printer
 else ifeq ($(HARDWARE_MOTHERBOARD),1157)
 # Ramps S 1.2 by Sakul.cz (Power outputs: Hotend0, Hotend1, Fan, Bed)
 else ifeq ($(HARDWARE_MOTHERBOARD),1158)
@@ -319,10 +330,18 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1160)
 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),1163)
+# Panowin Cutlass (as found in the Panowin F1)
 else ifeq ($(HARDWARE_MOTHERBOARD),1164)
+# Kodama Bardo V1.x (as found in the Kodama Trinus)
+else ifeq ($(HARDWARE_MOTHERBOARD),1165)
+# XTLW MFF V1.0
+else ifeq ($(HARDWARE_MOTHERBOARD),1166)
+# XTLW MFF V2.0
+else ifeq ($(HARDWARE_MOTHERBOARD),1167)
+# E3D Rumba BigBox
+else ifeq ($(HARDWARE_MOTHERBOARD),1168)
 
 #
 # RAMBo and derivatives
@@ -340,7 +359,7 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1203)
 else ifeq ($(HARDWARE_MOTHERBOARD),1204)
 # abee Scoovo X9H
 else ifeq ($(HARDWARE_MOTHERBOARD),1205)
-# Rambo ThinkerV2
+# ThinkerV2
 else ifeq ($(HARDWARE_MOTHERBOARD),1206)
 
 #
@@ -383,30 +402,42 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1315)
 else ifeq ($(HARDWARE_MOTHERBOARD),1316)
 # Geeetech GT2560 Rev B for A10(M/T/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),1317)
-# Geeetech GT2560 Rev B for A10(M/T/D)
-else ifeq ($(HARDWARE_MOTHERBOARD),1318)
 # Geeetech GT2560 Rev B for Mecreator2
+else ifeq ($(HARDWARE_MOTHERBOARD),1318)
+# Geeetech GT2560 Rev B for A20(M/T/D)
 else ifeq ($(HARDWARE_MOTHERBOARD),1319)
-# Geeetech GT2560 Rev B for A20(M/T/D)
+# Geeetech GT2560 Rev B for A10(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 ($(HARDWARE_MOTHERBOARD),1321)
+# Geeetech GT2560 V4.1B for A10(M/T/D)
+else ifeq ($(HARDWARE_MOTHERBOARD),1322)
+# Einstart retrofit
+else ifeq ($(HARDWARE_MOTHERBOARD),1323)
+# Wanhao 0ne+ i3 Mini
+else ifeq ($(HARDWARE_MOTHERBOARD),1324)
+# Wanhao D9 MK2
+else ifeq ($(HARDWARE_MOTHERBOARD),1325)
+# Overlord/Overlord Pro
+else ifeq ($(HARDWARE_MOTHERBOARD),1326)
+# ADIMLab Gantry v1
+else ifeq ($(HARDWARE_MOTHERBOARD),1327)
+# ADIMLab Gantry v2
 else ifeq ($(HARDWARE_MOTHERBOARD),1328)
-# Mega controller & Protoneer CNC Shield V3.00
+# Leapfrog Xeed 2015
 else ifeq ($(HARDWARE_MOTHERBOARD),1329)
+# PICA Shield (original version)
+else ifeq ($(HARDWARE_MOTHERBOARD),1330)
+# PICA Shield (rev C or later)
+else ifeq ($(HARDWARE_MOTHERBOARD),1331)
+# Intamsys 4.0 (Funmat HT)
+else ifeq ($(HARDWARE_MOTHERBOARD),1332)
+# Malyan M180 Mainboard Version 2
+else ifeq ($(HARDWARE_MOTHERBOARD),1333)
+# Mega controller & Protoneer CNC Shield V3.00
+else ifeq ($(HARDWARE_MOTHERBOARD),1334)
+# WEEDO 62A board (TINA2, Monoprice Cadet, etc.)
+else ifeq ($(HARDWARE_MOTHERBOARD),1335)
 
 #
 # ATmega1281, ATmega2561
@@ -440,7 +471,7 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1502)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega644p
   PROG_MCU         ?= m644p
-# Melzi V2.0
+# Melzi V2
 else ifeq ($(HARDWARE_MOTHERBOARD),1503)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
@@ -450,41 +481,46 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1504)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# Melzi Creality3D board (for CR-10 etc)
+# Melzi Creality3D (for CR-10 etc)
 else ifeq ($(HARDWARE_MOTHERBOARD),1505)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# Melzi Malyan M150 board
+# Melzi Creality3D (for Ender-2)
 else ifeq ($(HARDWARE_MOTHERBOARD),1506)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# Tronxy X5S
+# Melzi Malyan M150
 else ifeq ($(HARDWARE_MOTHERBOARD),1507)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# STB V1.1
+# Tronxy X5S
 else ifeq ($(HARDWARE_MOTHERBOARD),1508)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# Azteeg X1
+# STB V1.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1509)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# Anet 1.0 (Melzi clone)
+# Azteeg X1
 else ifeq ($(HARDWARE_MOTHERBOARD),1510)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
-# ZoneStar ZMIB V2
+# Anet 1.0 (Melzi clone)
 else ifeq ($(HARDWARE_MOTHERBOARD),1511)
   HARDWARE_VARIANT ?= Sanguino
   MCU              ?= atmega1284p
   PROG_MCU         ?= m1284p
+# ZoneStar ZMIB V2
+else ifeq ($(HARDWARE_MOTHERBOARD),1512)
+  HARDWARE_VARIANT ?= Sanguino
+  MCU              ?= atmega1284p
+  PROG_MCU         ?= m1284p
 
 #
 # Other ATmega644P, ATmega644, ATmega1284P
@@ -595,6 +631,10 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1707)
   MCU              ?= at90usb1286
   PROG_MCU         ?= usb1286
 
+#
+# SAM3X8E ARM Cortex-M3
+#
+
 # UltiMachine Archim1 (with DRV8825 drivers)
 else ifeq ($(HARDWARE_MOTHERBOARD),3023)
   HARDWARE_VARIANT ?= archim
@@ -767,10 +807,10 @@ 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
+    CHOPCONF.cpp GCONF.cpp PWMCONF.cpp DRV_CONF.cpp DRVCONF.cpp DRVCTRL.cpp DRVSTATUS.cpp \
+    GLOBAL_SCALER.cpp SLAVECONF.cpp IOIN.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 TMC2240Stepper.cpp TMC2660Stepper.cpp TMC5130Stepper.cpp TMC5160Stepper.cpp
 endif
 
 ifeq ($(RELOC_WORKAROUND), 1)
@@ -837,8 +877,8 @@ else ifeq ($(HARDWARE_VARIANT), archim)
 endif
 
 # Add all the source directories as include directories too
-CINCS = ${addprefix -I ,${VPATH}}
-CXXINCS = ${addprefix -I ,${VPATH}}
+CINCS = ${addprefix -I, ${VPATH}}
+CXXINCS = ${addprefix -I, ${VPATH}}
 
 # Silence warnings for library code (won't work for .h files, unfortunately)
 LIBWARN = -w -Wno-packed-bitfield-compat
@@ -995,7 +1035,7 @@ extcoff: $(TARGET).elf
 	$(NM) -n $< > $@
 
 # Link: create ELF output file from library.
-
+LDFLAGS+= -Wl,-V
 $(BUILD_DIR)/$(TARGET).elf: $(OBJ) Configuration.h
 	$(Pecho) "  CXX   $@"
 	$P $(CXX) $(LD_PREFIX) $(ALL_CXXFLAGS) -o $@ -L. $(OBJ) $(LDFLAGS) $(LD_SUFFIX)

Marlin/Version.h

@@ -41,7 +41,14 @@
  * here we define this default string as the date where the latest release
  * version was tagged.
  */
-//#define STRING_DISTRIBUTION_DATE "2024-08-29"
+//#define STRING_DISTRIBUTION_DATE "2025-12-02"
+
+/**
+ * The protocol for communication to the host. Protocol indicates communication
+ * standards such as the use of ASCII, "echo:" and "error:" line prefixes, etc.
+ * (Other behaviors are given by the firmware version and capabilities report.)
+ */
+//#define PROTOCOL_VERSION "1.0"
 
 /**
  * Defines a generic printer name to be output to the LCD after booting Marlin.
@@ -68,8 +75,8 @@
 //#define WEBSITE_URL "marlinfw.org"
 
 /**
- * Set the vendor info the serial USB interface, if changable
- * Currently only supported by DUE platform
+ * Set the vendor info the serial USB interface, if changeable.
+ * Currently only supported by DUE platform.
  */
 //#define USB_DEVICE_VENDOR_ID           0x0000
 //#define USB_DEVICE_PRODUCT_ID          0x0000

Marlin/config.ini

@@ -62,6 +62,11 @@ motherboard                              = BOARD_RAMPS_14_EFB
 serial_port                              = 0
 baudrate                                 = 250000
 
+string_config_h_author                   = "(default from config.ini)"
+
+capabilities_report                      = on
+extended_capabilities_report             = on
+
 use_watchdog                             = on
 thermal_protection_hotends               = on
 thermal_protection_hysteresis            = 4
@@ -77,18 +82,25 @@ 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
+pid_functional_range                     = 20
 
 default_kp                               = 22.20
 default_ki                               = 1.08
 default_kd                               = 114.00
 
+temp_sensor_bed                          = 1
+bed_check_interval                       = 5000
+bed_mintemp                              = 5
+bed_maxtemp                              = 150
+
+thermal_protection_bed                   = on
+thermal_protection_bed_hysteresis        = 2
+thermal_protection_bed_period            = 20
+
 x_driver_type                            = A4988
 y_driver_type                            = A4988
 z_driver_type                            = A4988
@@ -121,10 +133,10 @@ 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
+x_enable_on                              = LOW
+y_enable_on                              = LOW
+z_enable_on                              = LOW
+e_enable_on                              = LOW
 
 invert_x_dir                             = false
 invert_y_dir                             = true
@@ -136,11 +148,6 @@ 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
 
@@ -153,30 +160,33 @@ 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]
+hotend_overshoot                         = 15
 bed_overshoot                            = 10
+max_bed_power                            = 255
+
 busy_while_heating                       = on
-default_ejerk                            = 5.0
+host_keepalive_feature                   = on
 default_keepalive_interval               = 2
-default_leveling_fade_height             = 0.0
-disable_other_extruders                  = on
-display_charset_hd44780                  = JAPANESE
+printjob_timer_autostart                 = on
+
+jd_handle_small_segments                 = on
+validate_homing_endstops                 = on
+editable_steps_per_unit                  = on
+
 eeprom_boot_silent                       = on
 eeprom_chitchat                          = on
+
 endstoppullups                           = on
-extrude_maxlength                        = 200
+
+prevent_cold_extrusion                   = on
 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
+prevent_lengthy_extrude                  = on
+extrude_maxlength                        = 200
+
 min_software_endstops                    = on
 max_software_endstops                    = on
 min_software_endstop_x                   = on
@@ -185,63 +195,60 @@ 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_hotend                    = 180
 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)"
+preheat_1_fan_speed                      = 0
+
+preheat_2_label                          = "ABS"
+preheat_2_temp_hotend                    = 240
+preheat_2_temp_bed                       = 110
+preheat_2_fan_speed                      = 0
+
 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
+min_arc_segment_mm                       = 0.1
+max_arc_segment_mm                       = 1.0
+min_circle_segments                      = 72
+n_arc_correction                         = 25
+
 auto_report_temperatures                 = on
+
 autotemp                                 = on
+autotemp_min                             = 210
+autotemp_max                             = 250
+autotemp_factor                          = 0.1f
 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
+debug_flags_gcode                        = 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
+multistepping_limit                      = 16
+
+serial_overrun_protection                = on
 tx_buffer_size                           = 0
+
+watch_temp_increase                      = 2
+watch_temp_period                        = 40
+
 watch_bed_temp_increase                  = 2
 watch_bed_temp_period                    = 60
-watch_temp_increase                      = 2
-watch_temp_period                        = 20

Marlin/src/HAL/AVR/HAL.cpp

@@ -119,7 +119,6 @@ void MarlinHAL::reboot() {
 #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() {
@@ -154,7 +153,7 @@ void MarlinHAL::reboot() {
     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
+      marlin.minkill();  // interrupt-safe final kill and infinite loop
     }
   #endif
 

Marlin/src/HAL/AVR/HAL.h

@@ -129,11 +129,11 @@ typedef Servo hal_servo_t;
   #endif
 #endif
 
-#ifdef MMU2_SERIAL_PORT
-  #if !WITHIN(MMU2_SERIAL_PORT, 0, 3)
-    #error "MMU2_SERIAL_PORT must be from 0 to 3"
+#ifdef MMU_SERIAL_PORT
+  #if !WITHIN(MMU_SERIAL_PORT, 0, 3)
+    #error "MMU_SERIAL_PORT must be from 0 to 3"
   #endif
-  #define MMU2_SERIAL mmuSerial
+  #define MMU_SERIAL mmuSerial
 #endif
 
 #ifdef LCD_SERIAL_PORT
@@ -204,9 +204,9 @@ public:
   static void isr_on()  { sei(); }
   static void isr_off() { cli(); }
 
-  static void delay_ms(const int ms) { _delay_ms(ms); }
+  static void delay_ms(const int ms) { delay(ms); }
 
-  // Tasks, called from idle()
+  // Tasks, called from marlin.idle()
   static void idletask() {}
 
   // Reset

Marlin/src/HAL/AVR/MarlinSerial.cpp

@@ -41,7 +41,6 @@
 #if !defined(USBCON) && (defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H))
 
 #include "MarlinSerial.h"
-#include "../../MarlinCore.h"
 
 #if ENABLED(DIRECT_STEPPING)
   #include "../../feature/direct_stepping.h"
@@ -601,20 +600,20 @@ MSerialT1 customizedSerial1(MSerialT1::HasEmergencyParser);
 
 #endif // SERIAL_PORT_3
 
-#ifdef MMU2_SERIAL_PORT
+#ifdef MMU_SERIAL_PORT
 
-  ISR(SERIAL_REGNAME(USART, MMU2_SERIAL_PORT, _RX_vect)) {
-    MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::store_rxd_char();
+  ISR(SERIAL_REGNAME(USART, MMU_SERIAL_PORT, _RX_vect)) {
+    MarlinSerial<MMU2SerialCfg<MMU_SERIAL_PORT>>::store_rxd_char();
   }
 
-  ISR(SERIAL_REGNAME(USART, MMU2_SERIAL_PORT, _UDRE_vect)) {
-    MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::_tx_udr_empty_irq();
+  ISR(SERIAL_REGNAME(USART, MMU_SERIAL_PORT, _UDRE_vect)) {
+    MarlinSerial<MMU2SerialCfg<MMU_SERIAL_PORT>>::_tx_udr_empty_irq();
   }
 
-  template class MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> >;
+  template class MarlinSerial< MMU2SerialCfg<MMU_SERIAL_PORT> >;
   MSerialMMU2 mmuSerial(MSerialMMU2::HasEmergencyParser);
 
-#endif // MMU2_SERIAL_PORT
+#endif // MMU_SERIAL_PORT
 
 #ifdef LCD_SERIAL_PORT
 

Marlin/src/HAL/AVR/MarlinSerial.h

@@ -246,7 +246,7 @@
 
 #endif // !USBCON
 
-#ifdef MMU2_SERIAL_PORT
+#ifdef MMU_SERIAL_PORT
   template <uint8_t serial>
   struct MMU2SerialCfg {
     static constexpr int PORT               = serial;
@@ -260,7 +260,7 @@
     static constexpr bool RX_OVERRUNS       = false;
   };
 
-  typedef Serial1Class< MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> > > MSerialMMU2;
+  typedef Serial1Class< MarlinSerial< MMU2SerialCfg<MMU_SERIAL_PORT> > > MSerialMMU2;
   extern MSerialMMU2 mmuSerial;
 #endif
 

Marlin/src/HAL/AVR/fastio.cpp

@@ -241,7 +241,7 @@ 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_t hz, const float dca, const float dcb, const float dcc) {
+uint16_t set_pwm_frequency_hz(const float 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.
@@ -254,7 +254,7 @@ uint16_t set_pwm_frequency_hz(const_float_t hz, const float dca, const float dcb
     else                           { prescaler = 1;    SET_CS(5,    PRESCALER_1); }
 
     count /= float(prescaler);
-    const float pwm_top = round(count);   // Get the rounded count
+    const float pwm_top = roundf(count);   // Get the rounded count
 
     ICR5 = (uint16_t)pwm_top - 1;         // Subtract 1 for TOP
     OCR5A = pwm_top * ABS(dca);           // Update and scale DCs
@@ -280,7 +280,7 @@ uint16_t set_pwm_frequency_hz(const_float_t hz, const float dca, const float dcb
     SET_CS(5, PRESCALER_64);              // 16MHz / 64 = 250kHz
     OCR5A = OCR5B = OCR5C = 0;
   }
-  return round(count);
+  return roundf(count);
 }
 #endif
 

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

@@ -363,8 +363,11 @@
 #define AIO7_PWM    0
 #define AIO7_DDR    DDRF
 
-//-- Begin not supported by Teensyduino
-//-- don't use Arduino functions on these pins pinMode/digitalWrite/etc
+//-- 46-47 are not supported by Teensyduino
+//-- Don't use Arduino functions (pinMode, digitalWrite, etc.) on these pins
+#define PIN_E2   46
+#define PIN_E3   47
+
 #define DIO46_PIN   PINE2
 #define DIO46_RPORT PINE
 #define DIO46_WPORT PORTE
@@ -377,10 +380,7 @@
 #define DIO47_PWM   0
 #define DIO47_DDR   DDRE
 
-#define TEENSY_E2   46
-#define TEENSY_E3   47
-
-//-- end not supported by Teensyduino
+//--
 
 #undef PA0
 #define PA0_PIN     PINA0

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

@@ -95,7 +95,7 @@
 /**
  * The Trinamic library includes SoftwareSerial.h, leading to a compile error.
  */
-#if ALL(HAS_TRINAMIC_CONFIG, ENDSTOP_INTERRUPTS_FEATURE)
+#if ALL(HAS_TMC_SW_SERIAL, ENDSTOP_INTERRUPTS_FEATURE)
   #error "TMCStepper includes SoftwareSerial.h which is incompatible with ENDSTOP_INTERRUPTS_FEATURE. Disable ENDSTOP_INTERRUPTS_FEATURE to continue."
 #endif
 

Marlin/src/HAL/AVR/pinsDebug.h

@@ -22,7 +22,23 @@
 #pragma once
 
 /**
- * PWM print routines for Atmel 8 bit AVR CPUs
+ * Pins Debugging for Atmel 8 bit AVR CPUs
+ *
+ *   - NUMBER_PINS_TOTAL
+ *   - MULTI_NAME_PAD
+ *   - getPinByIndex(index)
+ *   - printPinNameByIndex(index)
+ *   - getPinIsDigitalByIndex(index)
+ *   - digitalPinToAnalogIndex(pin)
+ *   - getValidPinMode(pin)
+ *   - isValidPin(pin)
+ *   - isAnalogPin(pin)
+ *   - digitalRead_mod(pin)
+ *   - pwm_status(pin)
+ *   - printPinPWM(pin)
+ *   - printPinPort(pin)
+ *   - printPinNumber(pin)
+ *   - printPinAnalog(pin)
  */
 
 #include "../../inc/MarlinConfig.h"
@@ -39,30 +55,30 @@
   #include "pinsDebug_Teensyduino.h"
   // Can't use the "digitalPinToPort" function from the Teensyduino type IDEs
   // portModeRegister takes a different argument
-  #define digitalPinToTimer_DEBUG(p) digitalPinToTimer(p)
-  #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(p)
-  #define digitalPinToPort_DEBUG(p) digitalPinToPort(p)
-  #define getValidPinMode(pin) (*portModeRegister(pin) & digitalPinToBitMask_DEBUG(pin))
+  #define digitalPinToTimer_DEBUG(P) digitalPinToTimer(P)
+  #define digitalPinToBitMask_DEBUG(P) digitalPinToBitMask(P)
+  #define digitalPinToPort_DEBUG(P) digitalPinToPort(P)
+  #define getValidPinMode(P) (*portModeRegister(P) & digitalPinToBitMask_DEBUG(P))
 
 #elif AVR_ATmega2560_FAMILY_PLUS_70   // So we can access/display all the pins on boards using more than 70
 
   #include "pinsDebug_plus_70.h"
-  #define digitalPinToTimer_DEBUG(p) digitalPinToTimer_plus_70(p)
-  #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask_plus_70(p)
-  #define digitalPinToPort_DEBUG(p) digitalPinToPort_plus_70(p)
+  #define digitalPinToTimer_DEBUG(P) digitalPinToTimer_plus_70(P)
+  #define digitalPinToBitMask_DEBUG(P) digitalPinToBitMask_plus_70(P)
+  #define digitalPinToPort_DEBUG(P) digitalPinToPort_plus_70(P)
   bool getValidPinMode(pin_t pin) {return *portModeRegister(digitalPinToPort_DEBUG(pin)) & digitalPinToBitMask_DEBUG(pin); }
 
 #else
 
-  #define digitalPinToTimer_DEBUG(p) digitalPinToTimer(p)
-  #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(p)
-  #define digitalPinToPort_DEBUG(p) digitalPinToPort(p)
+  #define digitalPinToTimer_DEBUG(P) digitalPinToTimer(P)
+  #define digitalPinToBitMask_DEBUG(P) digitalPinToBitMask(P)
+  #define digitalPinToPort_DEBUG(P) digitalPinToPort(P)
   bool getValidPinMode(pin_t pin) {return *portModeRegister(digitalPinToPort_DEBUG(pin)) & digitalPinToBitMask_DEBUG(pin); }
-  #define getPinByIndex(p) pgm_read_byte(&pin_array[p].pin)
+  #define getPinByIndex(x) pgm_read_byte(&pin_array[x].pin)
 
 #endif
 
-#define isValidPin(pin) (pin >= 0 && pin < NUM_DIGITAL_PINS ? 1 : 0)
+#define isValidPin(P) (P >= 0 && P < NUMBER_PINS_TOTAL)
 #if AVR_ATmega1284_FAMILY
   #define isAnalogPin(P) WITHIN(P, analogInputToDigitalPin(7), analogInputToDigitalPin(0))
   #define digitalPinToAnalogIndex(P) int(isAnalogPin(P) ? (P) - analogInputToDigitalPin(7) : -1)
@@ -72,11 +88,11 @@
   #define isAnalogPin(P) (_ANALOG1(P) || _ANALOG2(P))
   #define digitalPinToAnalogIndex(P) int(_ANALOG1(P) ? (P) - analogInputToDigitalPin(0) : _ANALOG2(P) ? (P) - analogInputToDigitalPin(8) + 8 : -1)
 #endif
-#define getPinByIndex(p) pgm_read_byte(&pin_array[p].pin)
+#define getPinByIndex(x) pgm_read_byte(&pin_array[x].pin)
 #define MULTI_NAME_PAD 26 // space needed to be pretty if not first name assigned to a pin
 
-void printPinNameByIndex(uint8_t x) {
-  PGM_P const name_mem_pointer = (PGM_P)pgm_read_ptr(&pin_array[x].name);
+void printPinNameByIndex(const uint8_t index) {
+  PGM_P const name_mem_pointer = (PGM_P)pgm_read_ptr(&pin_array[index].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)
@@ -109,7 +125,7 @@ void printPinNameByIndex(uint8_t x) {
  * Print a pin's PWM status.
  * Return true if it's currently a PWM pin.
  */
-bool pwm_status(uint8_t pin) {
+bool pwm_status(const uint8_t pin) {
   char buffer[20];   // for the sprintf statements
 
   switch (digitalPinToTimer_DEBUG(pin)) {
@@ -276,7 +292,7 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   if (TEST(*TMSK, TOIE)) err_prob_interrupt();
 }
 
-void printPinPWM(uint8_t pin) {
+void printPinPWM(const uint8_t pin) {
   switch (digitalPinToTimer_DEBUG(pin)) {
 
     #if ABTEST(0)
@@ -361,16 +377,16 @@ void printPinPort(const pin_t pin) {   // print port number
     uint8_t x;
     SERIAL_ECHOPGM("  Port: ");
     #if AVR_AT90USB1286_FAMILY
-      x = (pin == 46 || pin == 47) ? 'E' : digitalPinToPort_DEBUG(pin) + 64;
+      x = (pin == PIN_E2 || pin == PIN_E3) ? 'E' : 'A' + digitalPinToPort_DEBUG(pin) - 1;
     #else
-      x = digitalPinToPort_DEBUG(pin) + 64;
+      x = 'A' + digitalPinToPort_DEBUG(pin) - 1;
     #endif
     SERIAL_CHAR(x);
 
     #if AVR_AT90USB1286_FAMILY
-      if (pin == 46)
+      if (pin == PIN_E2)
         x = '2';
-      else if (pin == 47)
+      else if (pin == PIN_E3)
         x = '3';
       else {
         uint8_t temp = digitalPinToBitMask_DEBUG(pin);
@@ -386,7 +402,7 @@ void printPinPort(const pin_t pin) {   // print port number
   #endif
 }
 
-#define printPinNumber(p) do{ sprintf_P(buffer, PSTR("%3d "), p); SERIAL_ECHO(buffer); }while(0)
-#define printPinAnalog(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), digitalPinToAnalogIndex(pin)); SERIAL_ECHO(buffer); }while(0)
+#define printPinNumber(P) do{ sprintf_P(buffer, PSTR("%3d "), P); SERIAL_ECHO(buffer); }while(0)
+#define printPinAnalog(P) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), digitalPinToAnalogIndex(P)); SERIAL_ECHO(buffer); }while(0)
 
 #undef ABTEST

Marlin/src/HAL/AVR/pinsDebug_Teensyduino.h

@@ -102,7 +102,7 @@ const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
 
 // digitalPinToBitMask(pin) is OK
 
-#define digitalRead_mod(p)  extDigitalRead(p)   // Teensyduino's version of digitalRead doesn't
+#define digitalRead_mod(P)  extDigitalRead(P)   // Teensyduino's version of digitalRead doesn't
                                                 // disable the PWMs so we can use it as is
 
 // portModeRegister(pin) is OK

Marlin/src/HAL/AVR/pinsDebug_plus_70.h

@@ -48,92 +48,92 @@
 const uint8_t PROGMEM digital_pin_to_port_PGM_plus_70[] = {
   // PORTLIST
   // ------------------------
-  PE  , // PE 0 ** 0 ** USART0_RX
-  PE  , // PE 1 ** 1 ** USART0_TX
-  PE  , // PE 4 ** 2 ** PWM2
-  PE  , // PE 5 ** 3 ** PWM3
-  PG  , // PG 5 ** 4 ** PWM4
-  PE  , // PE 3 ** 5 ** PWM5
-  PH  , // PH 3 ** 6 ** PWM6
-  PH  , // PH 4 ** 7 ** PWM7
-  PH  , // PH 5 ** 8 ** PWM8
-  PH  , // PH 6 ** 9 ** PWM9
-  PB  , // PB 4 ** 10 ** PWM10
-  PB  , // PB 5 ** 11 ** PWM11
-  PB  , // PB 6 ** 12 ** PWM12
-  PB  , // PB 7 ** 13 ** PWM13
-  PJ  , // PJ 1 ** 14 ** USART3_TX
-  PJ  , // PJ 0 ** 15 ** USART3_RX
-  PH  , // PH 1 ** 16 ** USART2_TX
-  PH  , // PH 0 ** 17 ** USART2_RX
-  PD  , // PD 3 ** 18 ** USART1_TX
-  PD  , // PD 2 ** 19 ** USART1_RX
-  PD  , // PD 1 ** 20 ** I2C_SDA
-  PD  , // PD 0 ** 21 ** I2C_SCL
-  PA  , // PA 0 ** 22 ** D22
-  PA  , // PA 1 ** 23 ** D23
-  PA  , // PA 2 ** 24 ** D24
-  PA  , // PA 3 ** 25 ** D25
-  PA  , // PA 4 ** 26 ** D26
-  PA  , // PA 5 ** 27 ** D27
-  PA  , // PA 6 ** 28 ** D28
-  PA  , // PA 7 ** 29 ** D29
-  PC  , // PC 7 ** 30 ** D30
-  PC  , // PC 6 ** 31 ** D31
-  PC  , // PC 5 ** 32 ** D32
-  PC  , // PC 4 ** 33 ** D33
-  PC  , // PC 3 ** 34 ** D34
-  PC  , // PC 2 ** 35 ** D35
-  PC  , // PC 1 ** 36 ** D36
-  PC  , // PC 0 ** 37 ** D37
-  PD  , // PD 7 ** 38 ** D38
-  PG  , // PG 2 ** 39 ** D39
-  PG  , // PG 1 ** 40 ** D40
-  PG  , // PG 0 ** 41 ** D41
-  PL  , // PL 7 ** 42 ** D42
-  PL  , // PL 6 ** 43 ** D43
-  PL  , // PL 5 ** 44 ** D44
-  PL  , // PL 4 ** 45 ** D45
-  PL  , // PL 3 ** 46 ** D46
-  PL  , // PL 2 ** 47 ** D47
-  PL  , // PL 1 ** 48 ** D48
-  PL  , // PL 0 ** 49 ** D49
-  PB  , // PB 3 ** 50 ** SPI_MISO
-  PB  , // PB 2 ** 51 ** SPI_MOSI
-  PB  , // PB 1 ** 52 ** SPI_SCK
-  PB  , // PB 0 ** 53 ** SPI_SS
-  PF  , // PF 0 ** 54 ** A0
-  PF  , // PF 1 ** 55 ** A1
-  PF  , // PF 2 ** 56 ** A2
-  PF  , // PF 3 ** 57 ** A3
-  PF  , // PF 4 ** 58 ** A4
-  PF  , // PF 5 ** 59 ** A5
-  PF  , // PF 6 ** 60 ** A6
-  PF  , // PF 7 ** 61 ** A7
-  PK  , // PK 0 ** 62 ** A8
-  PK  , // PK 1 ** 63 ** A9
-  PK  , // PK 2 ** 64 ** A10
-  PK  , // PK 3 ** 65 ** A11
-  PK  , // PK 4 ** 66 ** A12
-  PK  , // PK 5 ** 67 ** A13
-  PK  , // PK 6 ** 68 ** A14
-  PK  , // PK 7 ** 69 ** A15
-  PG  , // PG 4 ** 70 **
-  PG  , // PG 3 ** 71 **
-  PJ  , // PJ 2 ** 72 **
-  PJ  , // PJ 3 ** 73 **
-  PJ  , // PJ 7 ** 74 **
-  PJ  , // PJ 4 ** 75 **
-  PJ  , // PJ 5 ** 76 **
-  PJ  , // PJ 6 ** 77 **
-  PE  , // PE 2 ** 78 **
-  PE  , // PE 6 ** 79 **
-  PE  , // PE 7 ** 80 **
-  PD  , // PD 4 ** 81 **
-  PD  , // PD 5 ** 82 **
-  PD  , // PD 6 ** 83 **
-  PH  , // PH 2 ** 84 **
-  PH  , // PH 7 ** 85 **
+  PE, // PE 0 ** 0 ** USART0_RX
+  PE, // PE 1 ** 1 ** USART0_TX
+  PE, // PE 4 ** 2 ** PWM2
+  PE, // PE 5 ** 3 ** PWM3
+  PG, // PG 5 ** 4 ** PWM4
+  PE, // PE 3 ** 5 ** PWM5
+  PH, // PH 3 ** 6 ** PWM6
+  PH, // PH 4 ** 7 ** PWM7
+  PH, // PH 5 ** 8 ** PWM8
+  PH, // PH 6 ** 9 ** PWM9
+  PB, // PB 4 ** 10 ** PWM10
+  PB, // PB 5 ** 11 ** PWM11
+  PB, // PB 6 ** 12 ** PWM12
+  PB, // PB 7 ** 13 ** PWM13
+  PJ, // PJ 1 ** 14 ** USART3_TX
+  PJ, // PJ 0 ** 15 ** USART3_RX
+  PH, // PH 1 ** 16 ** USART2_TX
+  PH, // PH 0 ** 17 ** USART2_RX
+  PD, // PD 3 ** 18 ** USART1_TX
+  PD, // PD 2 ** 19 ** USART1_RX
+  PD, // PD 1 ** 20 ** I2C_SDA
+  PD, // PD 0 ** 21 ** I2C_SCL
+  PA, // PA 0 ** 22 ** D22
+  PA, // PA 1 ** 23 ** D23
+  PA, // PA 2 ** 24 ** D24
+  PA, // PA 3 ** 25 ** D25
+  PA, // PA 4 ** 26 ** D26
+  PA, // PA 5 ** 27 ** D27
+  PA, // PA 6 ** 28 ** D28
+  PA, // PA 7 ** 29 ** D29
+  PC, // PC 7 ** 30 ** D30
+  PC, // PC 6 ** 31 ** D31
+  PC, // PC 5 ** 32 ** D32
+  PC, // PC 4 ** 33 ** D33
+  PC, // PC 3 ** 34 ** D34
+  PC, // PC 2 ** 35 ** D35
+  PC, // PC 1 ** 36 ** D36
+  PC, // PC 0 ** 37 ** D37
+  PD, // PD 7 ** 38 ** D38
+  PG, // PG 2 ** 39 ** D39
+  PG, // PG 1 ** 40 ** D40
+  PG, // PG 0 ** 41 ** D41
+  PL, // PL 7 ** 42 ** D42
+  PL, // PL 6 ** 43 ** D43
+  PL, // PL 5 ** 44 ** D44
+  PL, // PL 4 ** 45 ** D45
+  PL, // PL 3 ** 46 ** D46
+  PL, // PL 2 ** 47 ** D47
+  PL, // PL 1 ** 48 ** D48
+  PL, // PL 0 ** 49 ** D49
+  PB, // PB 3 ** 50 ** SPI_MISO
+  PB, // PB 2 ** 51 ** SPI_MOSI
+  PB, // PB 1 ** 52 ** SPI_SCK
+  PB, // PB 0 ** 53 ** SPI_SS
+  PF, // PF 0 ** 54 ** A0
+  PF, // PF 1 ** 55 ** A1
+  PF, // PF 2 ** 56 ** A2
+  PF, // PF 3 ** 57 ** A3
+  PF, // PF 4 ** 58 ** A4
+  PF, // PF 5 ** 59 ** A5
+  PF, // PF 6 ** 60 ** A6
+  PF, // PF 7 ** 61 ** A7
+  PK, // PK 0 ** 62 ** A8
+  PK, // PK 1 ** 63 ** A9
+  PK, // PK 2 ** 64 ** A10
+  PK, // PK 3 ** 65 ** A11
+  PK, // PK 4 ** 66 ** A12
+  PK, // PK 5 ** 67 ** A13
+  PK, // PK 6 ** 68 ** A14
+  PK, // PK 7 ** 69 ** A15
+  PG, // PG 4 ** 70 **
+  PG, // PG 3 ** 71 **
+  PJ, // PJ 2 ** 72 **
+  PJ, // PJ 3 ** 73 **
+  PJ, // PJ 7 ** 74 **
+  PJ, // PJ 4 ** 75 **
+  PJ, // PJ 5 ** 76 **
+  PJ, // PJ 6 ** 77 **
+  PE, // PE 2 ** 78 **
+  PE, // PE 6 ** 79 **
+  PE, // PE 7 ** 80 **
+  PD, // PD 4 ** 81 **
+  PD, // PD 5 ** 82 **
+  PD, // PD 6 ** 83 **
+  PH, // PH 2 ** 84 **
+  PH, // PH 7 ** 85 **
 };
 
 #define digitalPinToPort_plus_70(P) ( pgm_read_byte( digital_pin_to_port_PGM_plus_70 + (P) ) )
@@ -141,92 +141,92 @@ const uint8_t PROGMEM digital_pin_to_port_PGM_plus_70[] = {
 const uint8_t PROGMEM digital_pin_to_bit_mask_PGM_plus_70[] = {
   // PIN IN PORT
   // ------------------------
-  _BV( 0 )  , // PE 0 ** 0 ** USART0_RX
-  _BV( 1 )  , // PE 1 ** 1 ** USART0_TX
-  _BV( 4 )  , // PE 4 ** 2 ** PWM2
-  _BV( 5 )  , // PE 5 ** 3 ** PWM3
-  _BV( 5 )  , // PG 5 ** 4 ** PWM4
-  _BV( 3 )  , // PE 3 ** 5 ** PWM5
-  _BV( 3 )  , // PH 3 ** 6 ** PWM6
-  _BV( 4 )  , // PH 4 ** 7 ** PWM7
-  _BV( 5 )  , // PH 5 ** 8 ** PWM8
-  _BV( 6 )  , // PH 6 ** 9 ** PWM9
-  _BV( 4 )  , // PB 4 ** 10 ** PWM10
-  _BV( 5 )  , // PB 5 ** 11 ** PWM11
-  _BV( 6 )  , // PB 6 ** 12 ** PWM12
-  _BV( 7 )  , // PB 7 ** 13 ** PWM13
-  _BV( 1 )  , // PJ 1 ** 14 ** USART3_TX
-  _BV( 0 )  , // PJ 0 ** 15 ** USART3_RX
-  _BV( 1 )  , // PH 1 ** 16 ** USART2_TX
-  _BV( 0 )  , // PH 0 ** 17 ** USART2_RX
-  _BV( 3 )  , // PD 3 ** 18 ** USART1_TX
-  _BV( 2 )  , // PD 2 ** 19 ** USART1_RX
-  _BV( 1 )  , // PD 1 ** 20 ** I2C_SDA
-  _BV( 0 )  , // PD 0 ** 21 ** I2C_SCL
-  _BV( 0 )  , // PA 0 ** 22 ** D22
-  _BV( 1 )  , // PA 1 ** 23 ** D23
-  _BV( 2 )  , // PA 2 ** 24 ** D24
-  _BV( 3 )  , // PA 3 ** 25 ** D25
-  _BV( 4 )  , // PA 4 ** 26 ** D26
-  _BV( 5 )  , // PA 5 ** 27 ** D27
-  _BV( 6 )  , // PA 6 ** 28 ** D28
-  _BV( 7 )  , // PA 7 ** 29 ** D29
-  _BV( 7 )  , // PC 7 ** 30 ** D30
-  _BV( 6 )  , // PC 6 ** 31 ** D31
-  _BV( 5 )  , // PC 5 ** 32 ** D32
-  _BV( 4 )  , // PC 4 ** 33 ** D33
-  _BV( 3 )  , // PC 3 ** 34 ** D34
-  _BV( 2 )  , // PC 2 ** 35 ** D35
-  _BV( 1 )  , // PC 1 ** 36 ** D36
-  _BV( 0 )  , // PC 0 ** 37 ** D37
-  _BV( 7 )  , // PD 7 ** 38 ** D38
-  _BV( 2 )  , // PG 2 ** 39 ** D39
-  _BV( 1 )  , // PG 1 ** 40 ** D40
-  _BV( 0 )  , // PG 0 ** 41 ** D41
-  _BV( 7 )  , // PL 7 ** 42 ** D42
-  _BV( 6 )  , // PL 6 ** 43 ** D43
-  _BV( 5 )  , // PL 5 ** 44 ** D44
-  _BV( 4 )  , // PL 4 ** 45 ** D45
-  _BV( 3 )  , // PL 3 ** 46 ** D46
-  _BV( 2 )  , // PL 2 ** 47 ** D47
-  _BV( 1 )  , // PL 1 ** 48 ** D48
-  _BV( 0 )  , // PL 0 ** 49 ** D49
-  _BV( 3 )  , // PB 3 ** 50 ** SPI_MISO
-  _BV( 2 )  , // PB 2 ** 51 ** SPI_MOSI
-  _BV( 1 )  , // PB 1 ** 52 ** SPI_SCK
-  _BV( 0 )  , // PB 0 ** 53 ** SPI_SS
-  _BV( 0 )  , // PF 0 ** 54 ** A0
-  _BV( 1 )  , // PF 1 ** 55 ** A1
-  _BV( 2 )  , // PF 2 ** 56 ** A2
-  _BV( 3 )  , // PF 3 ** 57 ** A3
-  _BV( 4 )  , // PF 4 ** 58 ** A4
-  _BV( 5 )  , // PF 5 ** 59 ** A5
-  _BV( 6 )  , // PF 6 ** 60 ** A6
-  _BV( 7 )  , // PF 7 ** 61 ** A7
-  _BV( 0 )  , // PK 0 ** 62 ** A8
-  _BV( 1 )  , // PK 1 ** 63 ** A9
-  _BV( 2 )  , // PK 2 ** 64 ** A10
-  _BV( 3 )  , // PK 3 ** 65 ** A11
-  _BV( 4 )  , // PK 4 ** 66 ** A12
-  _BV( 5 )  , // PK 5 ** 67 ** A13
-  _BV( 6 )  , // PK 6 ** 68 ** A14
-  _BV( 7 )  , // PK 7 ** 69 ** A15
-  _BV( 4 )  , // PG 4 ** 70 **
-  _BV( 3 )  , // PG 3 ** 71 **
-  _BV( 2 )  , // PJ 2 ** 72 **
-  _BV( 3 )  , // PJ 3 ** 73 **
-  _BV( 7 )  , // PJ 7 ** 74 **
-  _BV( 4 )  , // PJ 4 ** 75 **
-  _BV( 5 )  , // PJ 5 ** 76 **
-  _BV( 6 )  , // PJ 6 ** 77 **
-  _BV( 2 )  , // PE 2 ** 78 **
-  _BV( 6 )  , // PE 6 ** 79 **
-  _BV( 7 )  , // PE 7 ** 80 **
-  _BV( 4 )  , // PD 4 ** 81 **
-  _BV( 5 )  , // PD 5 ** 82 **
-  _BV( 6 )  , // PD 6 ** 83 **
-  _BV( 2 )  , // PH 2 ** 84 **
-  _BV( 7 )  , // PH 7 ** 85 **
+  _BV( 0 ), // PE 0 ** 0 ** USART0_RX
+  _BV( 1 ), // PE 1 ** 1 ** USART0_TX
+  _BV( 4 ), // PE 4 ** 2 ** PWM2
+  _BV( 5 ), // PE 5 ** 3 ** PWM3
+  _BV( 5 ), // PG 5 ** 4 ** PWM4
+  _BV( 3 ), // PE 3 ** 5 ** PWM5
+  _BV( 3 ), // PH 3 ** 6 ** PWM6
+  _BV( 4 ), // PH 4 ** 7 ** PWM7
+  _BV( 5 ), // PH 5 ** 8 ** PWM8
+  _BV( 6 ), // PH 6 ** 9 ** PWM9
+  _BV( 4 ), // PB 4 ** 10 ** PWM10
+  _BV( 5 ), // PB 5 ** 11 ** PWM11
+  _BV( 6 ), // PB 6 ** 12 ** PWM12
+  _BV( 7 ), // PB 7 ** 13 ** PWM13
+  _BV( 1 ), // PJ 1 ** 14 ** USART3_TX
+  _BV( 0 ), // PJ 0 ** 15 ** USART3_RX
+  _BV( 1 ), // PH 1 ** 16 ** USART2_TX
+  _BV( 0 ), // PH 0 ** 17 ** USART2_RX
+  _BV( 3 ), // PD 3 ** 18 ** USART1_TX
+  _BV( 2 ), // PD 2 ** 19 ** USART1_RX
+  _BV( 1 ), // PD 1 ** 20 ** I2C_SDA
+  _BV( 0 ), // PD 0 ** 21 ** I2C_SCL
+  _BV( 0 ), // PA 0 ** 22 ** D22
+  _BV( 1 ), // PA 1 ** 23 ** D23
+  _BV( 2 ), // PA 2 ** 24 ** D24
+  _BV( 3 ), // PA 3 ** 25 ** D25
+  _BV( 4 ), // PA 4 ** 26 ** D26
+  _BV( 5 ), // PA 5 ** 27 ** D27
+  _BV( 6 ), // PA 6 ** 28 ** D28
+  _BV( 7 ), // PA 7 ** 29 ** D29
+  _BV( 7 ), // PC 7 ** 30 ** D30
+  _BV( 6 ), // PC 6 ** 31 ** D31
+  _BV( 5 ), // PC 5 ** 32 ** D32
+  _BV( 4 ), // PC 4 ** 33 ** D33
+  _BV( 3 ), // PC 3 ** 34 ** D34
+  _BV( 2 ), // PC 2 ** 35 ** D35
+  _BV( 1 ), // PC 1 ** 36 ** D36
+  _BV( 0 ), // PC 0 ** 37 ** D37
+  _BV( 7 ), // PD 7 ** 38 ** D38
+  _BV( 2 ), // PG 2 ** 39 ** D39
+  _BV( 1 ), // PG 1 ** 40 ** D40
+  _BV( 0 ), // PG 0 ** 41 ** D41
+  _BV( 7 ), // PL 7 ** 42 ** D42
+  _BV( 6 ), // PL 6 ** 43 ** D43
+  _BV( 5 ), // PL 5 ** 44 ** D44
+  _BV( 4 ), // PL 4 ** 45 ** D45
+  _BV( 3 ), // PL 3 ** 46 ** D46
+  _BV( 2 ), // PL 2 ** 47 ** D47
+  _BV( 1 ), // PL 1 ** 48 ** D48
+  _BV( 0 ), // PL 0 ** 49 ** D49
+  _BV( 3 ), // PB 3 ** 50 ** SPI_MISO
+  _BV( 2 ), // PB 2 ** 51 ** SPI_MOSI
+  _BV( 1 ), // PB 1 ** 52 ** SPI_SCK
+  _BV( 0 ), // PB 0 ** 53 ** SPI_SS
+  _BV( 0 ), // PF 0 ** 54 ** A0
+  _BV( 1 ), // PF 1 ** 55 ** A1
+  _BV( 2 ), // PF 2 ** 56 ** A2
+  _BV( 3 ), // PF 3 ** 57 ** A3
+  _BV( 4 ), // PF 4 ** 58 ** A4
+  _BV( 5 ), // PF 5 ** 59 ** A5
+  _BV( 6 ), // PF 6 ** 60 ** A6
+  _BV( 7 ), // PF 7 ** 61 ** A7
+  _BV( 0 ), // PK 0 ** 62 ** A8
+  _BV( 1 ), // PK 1 ** 63 ** A9
+  _BV( 2 ), // PK 2 ** 64 ** A10
+  _BV( 3 ), // PK 3 ** 65 ** A11
+  _BV( 4 ), // PK 4 ** 66 ** A12
+  _BV( 5 ), // PK 5 ** 67 ** A13
+  _BV( 6 ), // PK 6 ** 68 ** A14
+  _BV( 7 ), // PK 7 ** 69 ** A15
+  _BV( 4 ), // PG 4 ** 70 **
+  _BV( 3 ), // PG 3 ** 71 **
+  _BV( 2 ), // PJ 2 ** 72 **
+  _BV( 3 ), // PJ 3 ** 73 **
+  _BV( 7 ), // PJ 7 ** 74 **
+  _BV( 4 ), // PJ 4 ** 75 **
+  _BV( 5 ), // PJ 5 ** 76 **
+  _BV( 6 ), // PJ 6 ** 77 **
+  _BV( 2 ), // PE 2 ** 78 **
+  _BV( 6 ), // PE 6 ** 79 **
+  _BV( 7 ), // PE 7 ** 80 **
+  _BV( 4 ), // PD 4 ** 81 **
+  _BV( 5 ), // PD 5 ** 82 **
+  _BV( 6 ), // PD 6 ** 83 **
+  _BV( 2 ), // PH 2 ** 84 **
+  _BV( 7 ), // PH 7 ** 85 **
 };
 
 #define digitalPinToBitMask_plus_70(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM_plus_70 + (P) ) )
@@ -234,86 +234,86 @@ const uint8_t PROGMEM digital_pin_to_bit_mask_PGM_plus_70[] = {
 const uint8_t PROGMEM digital_pin_to_timer_PGM_plus_70[] = {
   // TIMERS
   // ------------------------
-  NOT_ON_TIMER  , // PE 0 ** 0 ** USART0_RX
-  NOT_ON_TIMER  , // PE 1 ** 1 ** USART0_TX
-  TIMER3B , // PE 4 ** 2 ** PWM2
-  TIMER3C , // PE 5 ** 3 ** PWM3
-  TIMER0B , // PG 5 ** 4 ** PWM4
-  TIMER3A , // PE 3 ** 5 ** PWM5
-  TIMER4A , // PH 3 ** 6 ** PWM6
-  TIMER4B , // PH 4 ** 7 ** PWM7
-  TIMER4C , // PH 5 ** 8 ** PWM8
-  TIMER2B , // PH 6 ** 9 ** PWM9
-  TIMER2A , // PB 4 ** 10 ** PWM10
-  TIMER1A , // PB 5 ** 11 ** PWM11
-  TIMER1B , // PB 6 ** 12 ** PWM12
-  TIMER0A , // PB 7 ** 13 ** PWM13
-  NOT_ON_TIMER  , // PJ 1 ** 14 ** USART3_TX
-  NOT_ON_TIMER  , // PJ 0 ** 15 ** USART3_RX
-  NOT_ON_TIMER  , // PH 1 ** 16 ** USART2_TX
-  NOT_ON_TIMER  , // PH 0 ** 17 ** USART2_RX
-  NOT_ON_TIMER  , // PD 3 ** 18 ** USART1_TX
-  NOT_ON_TIMER  , // PD 2 ** 19 ** USART1_RX
-  NOT_ON_TIMER  , // PD 1 ** 20 ** I2C_SDA
-  NOT_ON_TIMER  , // PD 0 ** 21 ** I2C_SCL
-  NOT_ON_TIMER  , // PA 0 ** 22 ** D22
-  NOT_ON_TIMER  , // PA 1 ** 23 ** D23
-  NOT_ON_TIMER  , // PA 2 ** 24 ** D24
-  NOT_ON_TIMER  , // PA 3 ** 25 ** D25
-  NOT_ON_TIMER  , // PA 4 ** 26 ** D26
-  NOT_ON_TIMER  , // PA 5 ** 27 ** D27
-  NOT_ON_TIMER  , // PA 6 ** 28 ** D28
-  NOT_ON_TIMER  , // PA 7 ** 29 ** D29
-  NOT_ON_TIMER  , // PC 7 ** 30 ** D30
-  NOT_ON_TIMER  , // PC 6 ** 31 ** D31
-  NOT_ON_TIMER  , // PC 5 ** 32 ** D32
-  NOT_ON_TIMER  , // PC 4 ** 33 ** D33
-  NOT_ON_TIMER  , // PC 3 ** 34 ** D34
-  NOT_ON_TIMER  , // PC 2 ** 35 ** D35
-  NOT_ON_TIMER  , // PC 1 ** 36 ** D36
-  NOT_ON_TIMER  , // PC 0 ** 37 ** D37
-  NOT_ON_TIMER  , // PD 7 ** 38 ** D38
-  NOT_ON_TIMER  , // PG 2 ** 39 ** D39
-  NOT_ON_TIMER  , // PG 1 ** 40 ** D40
-  NOT_ON_TIMER  , // PG 0 ** 41 ** D41
-  NOT_ON_TIMER  , // PL 7 ** 42 ** D42
-  NOT_ON_TIMER  , // PL 6 ** 43 ** D43
-  TIMER5C , // PL 5 ** 44 ** D44
-  TIMER5B , // PL 4 ** 45 ** D45
-  TIMER5A , // PL 3 ** 46 ** D46
-  NOT_ON_TIMER  , // PL 2 ** 47 ** D47
-  NOT_ON_TIMER  , // PL 1 ** 48 ** D48
-  NOT_ON_TIMER  , // PL 0 ** 49 ** D49
-  NOT_ON_TIMER  , // PB 3 ** 50 ** SPI_MISO
-  NOT_ON_TIMER  , // PB 2 ** 51 ** SPI_MOSI
-  NOT_ON_TIMER  , // PB 1 ** 52 ** SPI_SCK
-  NOT_ON_TIMER  , // PB 0 ** 53 ** SPI_SS
-  NOT_ON_TIMER  , // PF 0 ** 54 ** A0
-  NOT_ON_TIMER  , // PF 1 ** 55 ** A1
-  NOT_ON_TIMER  , // PF 2 ** 56 ** A2
-  NOT_ON_TIMER  , // PF 3 ** 57 ** A3
-  NOT_ON_TIMER  , // PF 4 ** 58 ** A4
-  NOT_ON_TIMER  , // PF 5 ** 59 ** A5
-  NOT_ON_TIMER  , // PF 6 ** 60 ** A6
-  NOT_ON_TIMER  , // PF 7 ** 61 ** A7
-  NOT_ON_TIMER  , // PK 0 ** 62 ** A8
-  NOT_ON_TIMER  , // PK 1 ** 63 ** A9
-  NOT_ON_TIMER  , // PK 2 ** 64 ** A10
-  NOT_ON_TIMER  , // PK 3 ** 65 ** A11
-  NOT_ON_TIMER  , // PK 4 ** 66 ** A12
-  NOT_ON_TIMER  , // PK 5 ** 67 ** A13
-  NOT_ON_TIMER  , // PK 6 ** 68 ** A14
-  NOT_ON_TIMER  , // PK 7 ** 69 ** A15
-  NOT_ON_TIMER  , // PG 4 ** 70 **
-  NOT_ON_TIMER  , // PG 3 ** 71 **
-  NOT_ON_TIMER  , // PJ 2 ** 72 **
-  NOT_ON_TIMER  , // PJ 3 ** 73 **
-  NOT_ON_TIMER  , // PJ 7 ** 74 **
-  NOT_ON_TIMER  , // PJ 4 ** 75 **
-  NOT_ON_TIMER  , // PJ 5 ** 76 **
-  NOT_ON_TIMER  , // PJ 6 ** 77 **
-  NOT_ON_TIMER  , // PE 2 ** 78 **
-  NOT_ON_TIMER  , // PE 6 ** 79 **
+  NOT_ON_TIMER, // PE 0 ** 0 ** USART0_RX
+  NOT_ON_TIMER, // PE 1 ** 1 ** USART0_TX
+  TIMER3B, // PE 4 ** 2 ** PWM2
+  TIMER3C, // PE 5 ** 3 ** PWM3
+  TIMER0B, // PG 5 ** 4 ** PWM4
+  TIMER3A, // PE 3 ** 5 ** PWM5
+  TIMER4A, // PH 3 ** 6 ** PWM6
+  TIMER4B, // PH 4 ** 7 ** PWM7
+  TIMER4C, // PH 5 ** 8 ** PWM8
+  TIMER2B, // PH 6 ** 9 ** PWM9
+  TIMER2A, // PB 4 ** 10 ** PWM10
+  TIMER1A, // PB 5 ** 11 ** PWM11
+  TIMER1B, // PB 6 ** 12 ** PWM12
+  TIMER0A, // PB 7 ** 13 ** PWM13
+  NOT_ON_TIMER, // PJ 1 ** 14 ** USART3_TX
+  NOT_ON_TIMER, // PJ 0 ** 15 ** USART3_RX
+  NOT_ON_TIMER, // PH 1 ** 16 ** USART2_TX
+  NOT_ON_TIMER, // PH 0 ** 17 ** USART2_RX
+  NOT_ON_TIMER, // PD 3 ** 18 ** USART1_TX
+  NOT_ON_TIMER, // PD 2 ** 19 ** USART1_RX
+  NOT_ON_TIMER, // PD 1 ** 20 ** I2C_SDA
+  NOT_ON_TIMER, // PD 0 ** 21 ** I2C_SCL
+  NOT_ON_TIMER, // PA 0 ** 22 ** D22
+  NOT_ON_TIMER, // PA 1 ** 23 ** D23
+  NOT_ON_TIMER, // PA 2 ** 24 ** D24
+  NOT_ON_TIMER, // PA 3 ** 25 ** D25
+  NOT_ON_TIMER, // PA 4 ** 26 ** D26
+  NOT_ON_TIMER, // PA 5 ** 27 ** D27
+  NOT_ON_TIMER, // PA 6 ** 28 ** D28
+  NOT_ON_TIMER, // PA 7 ** 29 ** D29
+  NOT_ON_TIMER, // PC 7 ** 30 ** D30
+  NOT_ON_TIMER, // PC 6 ** 31 ** D31
+  NOT_ON_TIMER, // PC 5 ** 32 ** D32
+  NOT_ON_TIMER, // PC 4 ** 33 ** D33
+  NOT_ON_TIMER, // PC 3 ** 34 ** D34
+  NOT_ON_TIMER, // PC 2 ** 35 ** D35
+  NOT_ON_TIMER, // PC 1 ** 36 ** D36
+  NOT_ON_TIMER, // PC 0 ** 37 ** D37
+  NOT_ON_TIMER, // PD 7 ** 38 ** D38
+  NOT_ON_TIMER, // PG 2 ** 39 ** D39
+  NOT_ON_TIMER, // PG 1 ** 40 ** D40
+  NOT_ON_TIMER, // PG 0 ** 41 ** D41
+  NOT_ON_TIMER, // PL 7 ** 42 ** D42
+  NOT_ON_TIMER, // PL 6 ** 43 ** D43
+  TIMER5C, // PL 5 ** 44 ** D44
+  TIMER5B, // PL 4 ** 45 ** D45
+  TIMER5A, // PL 3 ** 46 ** D46
+  NOT_ON_TIMER, // PL 2 ** 47 ** D47
+  NOT_ON_TIMER, // PL 1 ** 48 ** D48
+  NOT_ON_TIMER, // PL 0 ** 49 ** D49
+  NOT_ON_TIMER, // PB 3 ** 50 ** SPI_MISO
+  NOT_ON_TIMER, // PB 2 ** 51 ** SPI_MOSI
+  NOT_ON_TIMER, // PB 1 ** 52 ** SPI_SCK
+  NOT_ON_TIMER, // PB 0 ** 53 ** SPI_SS
+  NOT_ON_TIMER, // PF 0 ** 54 ** A0
+  NOT_ON_TIMER, // PF 1 ** 55 ** A1
+  NOT_ON_TIMER, // PF 2 ** 56 ** A2
+  NOT_ON_TIMER, // PF 3 ** 57 ** A3
+  NOT_ON_TIMER, // PF 4 ** 58 ** A4
+  NOT_ON_TIMER, // PF 5 ** 59 ** A5
+  NOT_ON_TIMER, // PF 6 ** 60 ** A6
+  NOT_ON_TIMER, // PF 7 ** 61 ** A7
+  NOT_ON_TIMER, // PK 0 ** 62 ** A8
+  NOT_ON_TIMER, // PK 1 ** 63 ** A9
+  NOT_ON_TIMER, // PK 2 ** 64 ** A10
+  NOT_ON_TIMER, // PK 3 ** 65 ** A11
+  NOT_ON_TIMER, // PK 4 ** 66 ** A12
+  NOT_ON_TIMER, // PK 5 ** 67 ** A13
+  NOT_ON_TIMER, // PK 6 ** 68 ** A14
+  NOT_ON_TIMER, // PK 7 ** 69 ** A15
+  NOT_ON_TIMER, // PG 4 ** 70 **
+  NOT_ON_TIMER, // PG 3 ** 71 **
+  NOT_ON_TIMER, // PJ 2 ** 72 **
+  NOT_ON_TIMER, // PJ 3 ** 73 **
+  NOT_ON_TIMER, // PJ 7 ** 74 **
+  NOT_ON_TIMER, // PJ 4 ** 75 **
+  NOT_ON_TIMER, // PJ 5 ** 76 **
+  NOT_ON_TIMER, // PJ 6 ** 77 **
+  NOT_ON_TIMER, // PE 2 ** 78 **
+  NOT_ON_TIMER, // PE 6 ** 79 **
 };
 
 #define digitalPinToTimer_plus_70(P) ( pgm_read_byte( digital_pin_to_timer_PGM_plus_70 + (P) ) )

Marlin/src/HAL/AVR/registers.h

@@ -93,15 +93,15 @@ namespace AVRHelpers {
     typedef T type;
   };
   template <typename T>
-  struct voltype <T, 1u> {
+  struct voltype <T, 1U> {
     typedef uint8_t type;
   };
   template <typename T>
-  struct voltype <T, 2u> {
+  struct voltype <T, 2U> {
     typedef uint16_t type;
   };
   template <typename T>
-  struct voltype <T, 4u> {
+  struct voltype <T, 4U> {
     typedef uint32_t type;
   };
 
@@ -2007,7 +2007,7 @@ inline void _ATmega_resetperipherals() {
 
   #if defined(__AVR_TRM01__) || defined(__AVR_TRM02__) || defined(__AVR_TRM03__) || defined(__AVR_TRM05__)
     _EEAR._EEAR = 0;
-    dwrite(_EEDR, (uint8_t)0u);
+    dwrite(_EEDR, (uint8_t)0U);
   #endif
 
   #if defined(__AVR_TRM01__) || defined(__AVR_TRM02__) || defined(__AVR_TRM03__) || defined(__AVR_TRM04__) || defined(__AVR_TRM05__)

Marlin/src/HAL/AVR/spi_pins.h

@@ -23,43 +23,41 @@
 
 /**
  * Define SPI Pins: SCK, MISO, MOSI, SS
+ * Platform pins have parentheses, e.g., "(53)", so we cannot use them.
  */
 #if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__)
-  #define AVR_SCK_PIN  13
-  #define AVR_MISO_PIN 12
-  #define AVR_MOSI_PIN 11
-  #define AVR_SS_PIN   10
+  #define _PIN_SPI_SCK  13
+  #define _PIN_SPI_MISO 12
+  #define _PIN_SPI_MOSI 11
+  #define _PIN_SPI_SS   10
 #elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
-  #define AVR_SCK_PIN  7
-  #define AVR_MISO_PIN 6
-  #define AVR_MOSI_PIN 5
-  #define AVR_SS_PIN   4
+  #define _PIN_SPI_SCK  7
+  #define _PIN_SPI_MISO 6
+  #define _PIN_SPI_MOSI 5
+  #define _PIN_SPI_SS   4
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-  #define AVR_SCK_PIN  52
-  #define AVR_MISO_PIN 50
-  #define AVR_MOSI_PIN 51
-  #define AVR_SS_PIN   53
+  #define _PIN_SPI_SCK  52
+  #define _PIN_SPI_MISO 50
+  #define _PIN_SPI_MOSI 51
+  #define _PIN_SPI_SS   53
 #elif defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
-  #define AVR_SCK_PIN  21
-  #define AVR_MISO_PIN 23
-  #define AVR_MOSI_PIN 22
-  #define AVR_SS_PIN   20
+  #define _PIN_SPI_SCK  21
+  #define _PIN_SPI_MISO 23
+  #define _PIN_SPI_MOSI 22
+  #define _PIN_SPI_SS   20
 #elif defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
-  #define AVR_SCK_PIN  10
-  #define AVR_MISO_PIN 12
-  #define AVR_MOSI_PIN 11
-  #define AVR_SS_PIN   16
+  #define _PIN_SPI_SCK  10
+  #define _PIN_SPI_MISO 12
+  #define _PIN_SPI_MOSI 11
+  #define _PIN_SPI_SS   16
 #endif
 
 #ifndef SD_SCK_PIN
-  #define SD_SCK_PIN  AVR_SCK_PIN
+  #define SD_SCK_PIN  _PIN_SPI_SCK
 #endif
 #ifndef SD_MISO_PIN
-  #define SD_MISO_PIN AVR_MISO_PIN
+  #define SD_MISO_PIN _PIN_SPI_MISO
 #endif
 #ifndef SD_MOSI_PIN
-  #define SD_MOSI_PIN AVR_MOSI_PIN
-#endif
-#ifndef SD_SS_PIN
-  #define SD_SS_PIN   AVR_SS_PIN
+  #define SD_MOSI_PIN _PIN_SPI_MOSI
 #endif

Marlin/src/HAL/AVR/timers.h

@@ -28,7 +28,7 @@
 // ------------------------
 
 typedef uint16_t hal_timer_t;
-#define HAL_TIMER_TYPE_MAX 0xFFFF
+#define HAL_TIMER_TYPE_MAX 0xFFFFU
 
 // ------------------------
 // Defines
@@ -46,15 +46,15 @@ typedef uint16_t hal_timer_t;
   #define MF_TIMER_TEMP         0
 #endif
 
-#define TEMP_TIMER_FREQUENCY    (((F_CPU) + 0x2000) / 0x4000)
+#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)
+#define STEPPER_TIMER_RATE          HAL_TIMER_RATE
+#define STEPPER_TIMER_PRESCALE      8
+#define STEPPER_TIMER_TICKS_PER_US  ((STEPPER_TIMER_RATE) / 1000000UL)
 
-#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 PULSE_TIMER_RATE            STEPPER_TIMER_RATE                              // (Hz) Frequency of Pulse Timer
+#define PULSE_TIMER_TICKS_PER_US    STEPPER_TIMER_TICKS_PER_US
+#define PULSE_TIMER_PRESCALE        STEPPER_TIMER_PRESCALE
 
 #define ENABLE_STEPPER_DRIVER_INTERRUPT()  SBI(TIMSK1, OCIE1A)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() CBI(TIMSK1, OCIE1A)
@@ -111,8 +111,8 @@ 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(T) NOOP
-#define HAL_timer_isr_epilogue(T) NOOP
+inline void HAL_timer_isr_prologue(const uint8_t) {}
+inline void HAL_timer_isr_epilogue(const uint8_t) {}
 
 #ifndef HAL_STEP_TIMER_ISR
 

Marlin/src/HAL/AVR/u8g/u8g_com_HAL_AVR_sw_spi.cpp

@@ -55,12 +55,12 @@
 
 #if defined(ARDUINO) && !defined(ARDUINO_ARCH_STM32) && !defined(ARDUINO_ARCH_SAM)
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if HAS_MARLINUI_U8GLIB
 
-#include "../shared/Marduino.h"
-#include "../shared/Delay.h"
+#include "../../shared/Marduino.h"
+#include "../../shared/Delay.h"
 
 #include <U8glib-HAL.h>
 

Marlin/src/HAL/DUE/HAL.cpp

@@ -27,7 +27,6 @@
 #ifdef ARDUINO_ARCH_SAM
 
 #include "../../inc/MarlinConfig.h"
-#include "../../MarlinCore.h"
 
 #include <Wire.h>
 #include "usb/usb_task.h"
@@ -48,7 +47,7 @@ uint16_t MarlinHAL::adc_result;
 
 void MarlinHAL::init() {
   #if HAS_MEDIA
-    OUT_WRITE(SDSS, HIGH);  // Try to set SDSS inactive before any other SPI users start up
+    OUT_WRITE(SD_SS_PIN, HIGH);  // Try to set SDSS inactive before any other SPI users start up
   #endif
   usb_task_init();          // Initialize the USB stack
   TERN_(POSTMORTEM_DEBUGGING, install_min_serial()); // Install the min serial handler
@@ -102,6 +101,10 @@ void watchdogSetup() {
 
   #if ENABLED(USE_WATCHDOG)
 
+    #ifndef WATCHDOG_PIO_RESET
+      #define WATCHDOG_PIO_RESET
+    #endif
+
     // 4 seconds timeout
     uint32_t timeout = TERN(WATCHDOG_DURATION_8S, 8000, 4000);
 
@@ -115,15 +118,16 @@ void watchdogSetup() {
       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.
+    uint32_t value = (0
+      | WDT_MR_WDV(timeout)               // With the specified timeout
+      | WDT_MR_WDD(timeout)               // and no invalid write window
+      #if NONE(WATCHDOG_PIO_RESET, SAMV70, SAMV71, SAME70, SAMS70)
+        | WDT_MR_WDRPROC                  // WDT fault resets processor only with this flag.
+                                          // Omit to also reset the PIO controller.
+      #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.

Marlin/src/HAL/DUE/HAL.h

@@ -35,67 +35,9 @@
 
 #include <stdint.h>
 
-#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)
-
-#if SERIAL_PORT == -1 || ENABLED(EMERGENCY_PARSER)
-  #define MYSERIAL1 customizedSerial1
-#elif WITHIN(SERIAL_PORT, 0, 3)
-  #define MYSERIAL1 MSERIAL(SERIAL_PORT)
-#else
-  #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 MYSERIAL2 customizedSerial2
-  #elif WITHIN(SERIAL_PORT_2, 0, 3)
-    #define MYSERIAL2 MSERIAL(SERIAL_PORT_2)
-  #else
-    #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 WITHIN(LCD_SERIAL_PORT, 0, 3)
-    #define LCD_SERIAL MSERIAL(LCD_SERIAL_PORT)
-  #else
-    #error "LCD_SERIAL_PORT must be from 0 to 3."
-  #endif
-#endif
+//
+// Serial Ports
+//
 
 #include "MarlinSerial.h"
 #include "MarlinSerialUSB.h"
@@ -190,7 +132,7 @@ public:
 
   static void delay_ms(const int ms) { delay(ms); }
 
-  // Tasks, called from idle()
+  // Tasks, called from marlin.idle()
   static void idletask();
 
   // Reset

Marlin/src/HAL/DUE/HAL_SPI.cpp

@@ -208,8 +208,8 @@
       A("str %[sck_mask],[%[sck_port],#0x4]")      /* CODR */
       A("bfi %[bin],%[work],#0,#1")                /* Store read bit as the bit 0 */
 
-      : [bin]"+r"(bin),
-        [work]"+r"(work)
+      : [bin]"+r"( bin ),
+        [work]"+r"( work )
       : [bitband_miso_port]"r"( BITBAND_MISO_PORT ),
         [sck_mask]"r"( SCK_MASK ),
         [sck_port]"r"( SCK_PORT_PLUS30 )
@@ -350,7 +350,7 @@
   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(SD_MISO_PIN))+0x3C, PIN_SHIFT(SD_MISO_PIN));  /* PDSR of port in bitband area */
+    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);
 
@@ -412,10 +412,10 @@
       A("strb.w %[bin], [%[ptr]], #1")             /* Store read value into buffer, increment buffer pointer */
       A("bne.n loop%=")                            /* Repeat until done */
 
-      : [ptr]"+r"(ptr),
-        [todo]"+r"(todo),
-        [bin]"+r"(bin),
-        [work]"+r"(work)
+      : [ptr]"+r"( ptr ),
+        [todo]"+r"( todo ),
+        [bin]"+r"( bin ),
+        [work]"+r"( work )
       : [bitband_miso_port]"r"( BITBAND_MISO_PORT ),
         [sck_mask]"r"( SCK_MASK ),
         [sck_port]"r"( SCK_PORT_PLUS30 )
@@ -600,9 +600,8 @@
       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);
+      OUT_WRITE(SD_SS_PIN, HIGH);
+      WRITE(SD_SS_PIN, LOW);
 
       PIO_Configure(
         g_APinDescription[SPI_PIN].pPort,
@@ -767,7 +766,7 @@
 
       // Disable PIO on A26 and A27
       REG_PIOA_PDR = 0x0C000000;
-      OUT_WRITE(SDSS, HIGH);
+      OUT_WRITE(SD_SS_PIN, HIGH);
 
       // Reset SPI0 (from sam lib)
       SPI0->SPI_CR = SPI_CR_SPIDIS;

Marlin/src/HAL/DUE/MarlinSerial.cpp

@@ -31,7 +31,6 @@
 
 #include "MarlinSerial.h"
 #include "InterruptVectors.h"
-#include "../../MarlinCore.h"
 
 template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_r MarlinSerial<Cfg>::rx_buffer = { 0, 0, { 0 } };
 template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_t MarlinSerial<Cfg>::tx_buffer = { 0 };

Marlin/src/HAL/DUE/MarlinSerial.h

@@ -33,6 +33,21 @@
 #include "../../core/types.h"
 #include "../../core/serial_hook.h"
 
+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 SERIAL_INDEX_MIN 0
+#define SERIAL_INDEX_MAX 3
+#define EP_SERIAL_PORT(N) customizedSerial##N
+#define USB_SERIAL_PORT(N) customizedSerial##N
+#include "../shared/serial_ports.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
 // location to which to write the next incoming character and rx_buffer_tail

Marlin/src/HAL/DUE/eeprom/eeprom_flash.cpp

@@ -21,7 +21,7 @@
  */
 #ifdef ARDUINO_ARCH_SAM
 
-#include "../../inc/MarlinConfig.h"
+#include "../../../inc/MarlinConfig.h"
 
 #if ENABLED(FLASH_EEPROM_EMULATION)
 
@@ -132,7 +132,7 @@ static uint8_t buffer[256] = {0},   // The RAM buffer to accumulate writes
                curGroup = 0xFF;     // Current FLASH group
 
 #define DEBUG_OUT ENABLED(EE_EMU_DEBUG)
-#include "../../core/debug_out.h"
+#include "../../../core/debug_out.h"
 
 static void ee_Dump(const int page, const void *data) {
 
@@ -291,7 +291,7 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
       uint32_t *p1 = (uint32_t*)addrflash;
       uint32_t *p2 = (uint32_t*)data;
       int count = 0;
-      for (i =0; i<PageSize >> 2; i++) {
+      for (i = 0; i < PageSize >> 2; i++) {
         if (p1[i] != p2[i]) {
           uint32_t delta = p1[i] ^ p2[i];
           while (delta) {
@@ -953,7 +953,7 @@ static void ee_Init() {
 
 /* PersistentStore -----------------------------------------------------------*/
 
-#include "../shared/eeprom_api.h"
+#include "../../shared/eeprom_api.h"
 
 #ifndef MARLIN_EEPROM_SIZE
   #define MARLIN_EEPROM_SIZE 0x1000 // 4KB

Marlin/src/HAL/DUE/eeprom/eeprom_wired.cpp

@@ -21,7 +21,7 @@
  */
 #ifdef ARDUINO_ARCH_SAM
 
-#include "../../inc/MarlinConfig.h"
+#include "../../../inc/MarlinConfig.h"
 
 #if USE_WIRED_EEPROM
 
@@ -30,8 +30,8 @@
  * with simple implementations supplied by Marlin.
  */
 
-#include "../shared/eeprom_if.h"
-#include "../shared/eeprom_api.h"
+#include "../../shared/eeprom_if.h"
+#include "../../shared/eeprom_api.h"
 
 #ifndef MARLIN_EEPROM_SIZE
   #error "MARLIN_EEPROM_SIZE is required for I2C / SPI EEPROM."

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

@@ -40,11 +40,12 @@
  * Some jitter in the Vref signal is OK so the interrupt priority is left at its default value.
  */
 
-#include "../../../inc/MarlinConfig.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if MB(PRINTRBOARD_G2)
 
 #include "G2_PWM.h"
+#include "../../../module/stepper.h"
 
 #if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
   #define G2_PWM_X 1
@@ -56,16 +57,12 @@
 #else
   #define G2_PWM_Y 0
 #endif
-#if PIN_EXISTS(MOTOR_CURRENT_PWM_Z)
+#if HAS_MOTOR_CURRENT_PWM_Z
   #define G2_PWM_Z 1
 #else
   #define G2_PWM_Z 0
 #endif
-#if HAS_MOTOR_CURRENT_PWM_E
-  #define G2_PWM_E 1
-#else
-  #define G2_PWM_E 0
-#endif
+#define G2_PWM_E HAS_MOTOR_CURRENT_PWM_E
 #define G2_MASK_X(V) (G2_PWM_X * (V))
 #define G2_MASK_Y(V) (G2_PWM_Y * (V))
 #define G2_MASK_Z(V) (G2_PWM_Z * (V))
@@ -80,17 +77,22 @@ PWM_map ISR_table[NUM_PWMS] = PWM_MAP_INIT;
 
 void Stepper::digipot_init() {
 
-  #if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
-    OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, 0);  // init pins
+  #if G2_PWM_X
+    OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, LOW);  // init pins
   #endif
-  #if PIN_EXISTS(MOTOR_CURRENT_PWM_Y)
-    OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, 0);
+  #if G2_PWM_Y
+    OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, LOW);
   #endif
   #if G2_PWM_Z
-    OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, 0);
+    OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, LOW);
   #endif
   #if G2_PWM_E
-    OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, 0);
+    #if PIN_EXISTS(MOTOR_CURRENT_PWM_E)
+      OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, LOW);
+    #endif
+    #if PIN_EXISTS(MOTOR_CURRENT_PWM_E0)
+      OUT_WRITE(MOTOR_CURRENT_PWM_E0_PIN, LOW);
+    #endif
   #endif
 
   #define WPKEY          (0x50574D << 8) // “PWM” in ASCII

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

@@ -26,10 +26,7 @@
  * PR #7500. It is hardwired for the PRINTRBOARD_G2 Motor Current needs.
  */
 
-#include "../../../inc/MarlinConfigPre.h"
-#include "../../../module/stepper.h"
-//C:\Users\bobku\Documents\GitHub\Marlin-Bob-2\Marlin\src\module\stepper.h
-//C:\Users\bobku\Documents\GitHub\Marlin-Bob-2\Marlin\src\HAL\HAL_DUE\G2_PWM.h
+#include <stdint.h>
 
 #define PWM_PERIOD_US  100  // base repetition rate in micro seconds
 

Marlin/src/HAL/DUE/pinsDebug.h

@@ -19,13 +19,26 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
- * Support routines for Due
- */
-
-/**
- * Translation of routines & variables used by pinsDebug.h
+ * Pins Debugging for DUE
+ *
+ *   - NUMBER_PINS_TOTAL
+ *   - MULTI_NAME_PAD
+ *   - getPinByIndex(index)
+ *   - printPinNameByIndex(index)
+ *   - getPinIsDigitalByIndex(index)
+ *   - digitalPinToAnalogIndex(pin)
+ *   - getValidPinMode(pin)
+ *   - isValidPin(pin)
+ *   - isAnalogPin(pin)
+ *   - digitalRead_mod(pin)
+ *   - pwm_status(pin)
+ *   - printPinPWM(pin)
+ *   - printPinPort(pin)
+ *   - printPinNumber(pin)
+ *   - printPinAnalog(pin)
  */
 
 #include "../shared/Marduino.h"
@@ -63,20 +76,20 @@
 
 #define NUMBER_PINS_TOTAL PINS_COUNT
 
-#define digitalRead_mod(p) extDigitalRead(p)  // AVR digitalRead disabled PWM before it read the pin
+#define digitalRead_mod(P) extDigitalRead(P)  // AVR digitalRead disabled PWM before it read the pin
 #define printPinNameByIndex(x) do{ sprintf_P(buffer, PSTR("%-" STRINGIFY(MAX_NAME_LENGTH) "s"), pin_array[x].name); SERIAL_ECHO(buffer); }while(0)
-#define printPinNumber(p) do{ sprintf_P(buffer, PSTR("%02d"), p); SERIAL_ECHO(buffer); }while(0)
-#define printPinAnalog(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), digitalPinToAnalogIndex(pin)); SERIAL_ECHO(buffer); }while(0)
-#define getPinByIndex(p) pin_array[p].pin
-#define getPinIsDigitalByIndex(p) pin_array[p].is_digital
-#define isValidPin(pin) (pin >= 0 && pin < int8_t(NUMBER_PINS_TOTAL))
-#define digitalPinToAnalogIndex(p) int(p - analogInputToDigitalPin(0))
+#define printPinNumber(P) do{ sprintf_P(buffer, PSTR("%02d"), P); SERIAL_ECHO(buffer); }while(0)
+#define printPinAnalog(P) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), digitalPinToAnalogIndex(P)); SERIAL_ECHO(buffer); }while(0)
+#define getPinByIndex(x) pin_array[x].pin
+#define getPinIsDigitalByIndex(x) pin_array[x].is_digital
+#define isValidPin(P) (P >= 0 && P < pin_t(NUMBER_PINS_TOTAL))
+#define digitalPinToAnalogIndex(P) int(P - analogInputToDigitalPin(0))
 #define isAnalogPin(P) WITHIN(P, pin_t(analogInputToDigitalPin(0)), pin_t(analogInputToDigitalPin(NUM_ANALOG_INPUTS - 1)))
-#define pwm_status(pin) (((g_pinStatus[pin] & 0xF) == PIN_STATUS_PWM) && \
-                        ((g_APinDescription[pin].ulPinAttribute & PIN_ATTR_PWM) == PIN_ATTR_PWM))
+#define pwm_status(P) (((g_pinStatus[P] & 0xF) == PIN_STATUS_PWM) && \
+                        ((g_APinDescription[P].ulPinAttribute & PIN_ATTR_PWM) == PIN_ATTR_PWM))
 #define MULTI_NAME_PAD 14 // space needed to be pretty if not first name assigned to a pin
 
-bool getValidPinMode(int8_t pin) {  // 1: output, 0: input
+bool getValidPinMode(const pin_t pin) {  // 1: output, 0: input
   volatile Pio* port = g_APinDescription[pin].pPort;
   uint32_t mask = g_APinDescription[pin].ulPin;
   uint8_t pin_status = g_pinStatus[pin] & 0xF;
@@ -85,7 +98,7 @@ bool getValidPinMode(int8_t pin) {  // 1: output, 0: input
           || pwm_status(pin));
 }
 
-void printPinPWM(int32_t pin) {
+void printPinPWM(const int32_t pin) {
   if (pwm_status(pin)) {
     uint32_t chan = g_APinDescription[pin].ulPWMChannel;
     SERIAL_ECHOPGM("PWM = ", PWM_INTERFACE->PWM_CH_NUM[chan].PWM_CDTY);

Marlin/src/HAL/DUE/spi_pins.h

@@ -26,39 +26,36 @@
  *
  * Available chip select pins for HW SPI are 4 10 52 77 87
  */
-#if SDSS == 4 || SDSS == 10 || SDSS == 52 || SDSS == 77 || SDSS == 87
-  #if SDSS == 4
-    #define SPI_PIN         87
-    #define SPI_CHAN         1
-  #elif SDSS == 10
-    #define SPI_PIN         77
-    #define SPI_CHAN         0
-  #elif SDSS == 52
-    #define SPI_PIN         86
-    #define SPI_CHAN         2
-  #elif SDSS == 77
-    #define SPI_PIN         77
-    #define SPI_CHAN         0
-  #else
-    #define SPI_PIN         87
-    #define SPI_CHAN         1
-  #endif
-  #define SD_SCK_PIN        76
-  #define SD_MISO_PIN       74
-  #define SD_MOSI_PIN       75
-#else
-  // defaults
-  #define SOFTWARE_SPI
-  #ifndef SD_SCK_PIN
-    #define SD_SCK_PIN      52
-  #endif
-  #ifndef SD_MISO_PIN
-    #define SD_MISO_PIN     50
-  #endif
-  #ifndef SD_MOSI_PIN
-    #define SD_MOSI_PIN     51
-  #endif
+#if SD_SS_PIN == 4 || SD_SS_PIN == 10 || SD_SS_PIN == 52 || SD_SS_PIN == 77 || SD_SS_PIN == 87
+  #define SD_SCK_PIN      76
+  #define SD_MISO_PIN     74
+  #define SD_MOSI_PIN     75
 #endif
 
-/* A.28, A.29, B.21, C.26, C.29 */
-#define SD_SS_PIN         SDSS
+#if SD_SS_PIN == 4
+  #define SPI_PIN         87
+  #define SPI_CHAN         1
+#elif SD_SS_PIN == 10
+  #define SPI_PIN         77
+  #define SPI_CHAN         0
+#elif SD_SS_PIN == 52
+  #define SPI_PIN         86
+  #define SPI_CHAN         2
+#elif SD_SS_PIN == 77
+  #define SPI_PIN         77
+  #define SPI_CHAN         0
+#elif SD_SS_PIN == 87
+  #define SPI_PIN         87
+  #define SPI_CHAN         1
+#else
+  #define SOFTWARE_SPI
+  #ifndef SD_SCK_PIN
+    #define SD_SCK_PIN    52
+  #endif
+  #ifndef SD_MISO_PIN
+    #define SD_MISO_PIN   50
+  #endif
+  #ifndef SD_MOSI_PIN
+    #define SD_MOSI_PIN   51
+  #endif
+#endif

Marlin/src/HAL/DUE/timers.h

@@ -34,7 +34,7 @@
 #define FORCE_INLINE __attribute__((always_inline)) inline
 
 typedef uint32_t hal_timer_t;
-#define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
+#define HAL_TIMER_TYPE_MAX 0xFFFFFFFFUL
 
 #define HAL_TIMER_PRESCALER    2
 #define HAL_TIMER_RATE         ((F_CPU) / (HAL_TIMER_PRESCALER))  // frequency of timers peripherals
@@ -52,19 +52,19 @@ typedef uint32_t hal_timer_t;
   #define MF_TIMER_TONE         6  // index of timer to use for beeper tones
 #endif
 
-#define TEMP_TIMER_FREQUENCY   1000 // temperature interrupt frequency
+#define TEMP_TIMER_FREQUENCY   1000 // (Hz) Temperature ISR 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_RATE          HAL_TIMER_RATE                                  // (Hz) Frequency of Stepper Timer ISR (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
+#define STEPPER_TIMER_TICKS_PER_US  ((STEPPER_TIMER_RATE) / 1000000UL)              // (MHz) 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_RATE            STEPPER_TIMER_RATE                              // (Hz) Frequency of Pulse Timer
 #define PULSE_TIMER_TICKS_PER_US    STEPPER_TIMER_TICKS_PER_US
+#define PULSE_TIMER_PRESCALE        STEPPER_TIMER_PRESCALE
 
-#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(MF_TIMER_STEP)
+#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 STEPPER_ISR_ENABLED()               HAL_timer_interrupt_enabled(MF_TIMER_STEP)
 
 #define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(MF_TIMER_TEMP)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(MF_TIMER_TEMP)
@@ -127,4 +127,4 @@ FORCE_INLINE static void HAL_timer_isr_prologue(const uint8_t timer_num) {
   pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_SR;
 }
 
-#define HAL_timer_isr_epilogue(T) NOOP
+inline void HAL_timer_isr_epilogue(const uint8_t) {}

Marlin/src/HAL/DUE/usb/ctrl_access.c

@@ -63,8 +63,8 @@
 #include "compiler.h"
 #include "preprocessor.h"
 #ifdef FREERTOS_USED
-#include "FreeRTOS.h"
-#include "semphr.h"
+#include <FreeRTOS.h>
+#include <semphr.h>
 #endif
 #include "ctrl_access.h"
 

Marlin/src/HAL/DUE/usb/sd_mmc_spi_mem.cpp

@@ -19,7 +19,7 @@ void sd_mmc_spi_mem_init() {
 }
 
 inline bool media_ready() {
-  return IS_SD_INSERTED() && !IS_SD_PRINTING() && !IS_SD_FILE_OPEN() && card.isMounted();
+  return card.isMounted() && card.isInserted() && !card.isFileOpen() && !card.isStillPrinting();
 }
 
 bool sd_mmc_spi_unload(bool) { return true; }
@@ -29,17 +29,16 @@ bool sd_mmc_spi_wr_protect() { return false; }
 bool sd_mmc_spi_removal() { return !media_ready(); }
 
 Ctrl_status sd_mmc_spi_test_unit_ready() {
-  #ifdef DISABLE_DUE_SD_MMC
+  #if ENABLED(DISABLE_DUE_SD_MMC)
     return CTRL_NO_PRESENT;
   #endif
-  if (!media_ready()) return CTRL_NO_PRESENT;
-  return CTRL_GOOD;
+  return sd_mmc_spi_removal() ? CTRL_NO_PRESENT : CTRL_GOOD;
 }
 
 // NOTE: This function is defined as returning the address of the last block
 // in the card, which is cardSize() - 1
 Ctrl_status sd_mmc_spi_read_capacity(uint32_t *nb_sector) {
-  if (!media_ready()) return CTRL_NO_PRESENT;
+  if (sd_mmc_spi_removal()) return CTRL_NO_PRESENT;
   *nb_sector = card.diskIODriver()->cardSize() - 1;
   return CTRL_GOOD;
 }
@@ -58,10 +57,11 @@ uint8_t sector_buf[SD_MMC_BLOCK_SIZE];
 // #define DEBUG_MMC
 
 Ctrl_status sd_mmc_spi_usb_read_10(uint32_t addr, uint16_t nb_sector) {
-  #ifdef DISABLE_DUE_SD_MMC
+  #if ENABLED(DISABLE_DUE_SD_MMC)
     return CTRL_NO_PRESENT;
   #endif
-  if (!media_ready()) return CTRL_NO_PRESENT;
+
+  if (sd_mmc_spi_removal()) return CTRL_NO_PRESENT;
 
   #ifdef DEBUG_MMC
   {
@@ -97,10 +97,11 @@ Ctrl_status sd_mmc_spi_usb_read_10(uint32_t addr, uint16_t nb_sector) {
 }
 
 Ctrl_status sd_mmc_spi_usb_write_10(uint32_t addr, uint16_t nb_sector) {
-  #ifdef DISABLE_DUE_SD_MMC
+  #if ENABLED(DISABLE_DUE_SD_MMC)
     return CTRL_NO_PRESENT;
   #endif
-  if (!media_ready()) return CTRL_NO_PRESENT;
+
+  if (sd_mmc_spi_removal()) return CTRL_NO_PRESENT;
 
   #ifdef DEBUG_MMC
   {

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

@@ -229,7 +229,7 @@ usb_iface_desc_t UDC_DESC_STORAGE *udc_get_interface_desc(void);
  * - USB Device Controller (UDC) provides USB chapter 9 compliance
  * - USB Device Interface (UDI) provides USB Class compliance
  * - USB Device Driver (UDD) provides USB Driver for each Atmel MCU
-
+ *
  * Many USB Device applications can be implemented on Atmel MCU.
  * Atmel provides many application notes for different applications:
  * - AVR4900, provides general information about Device Stack

Marlin/src/HAL/DUE/usb/uotghs_device_due.c

@@ -523,7 +523,7 @@ static bool udd_ep_interrupt(void);
  * \internal
  * \brief Function called by UOTGHS interrupt to manage USB Device interrupts
  *
- * USB Device interrupt events are splited in three parts:
+ * USB Device interrupt events are split in three parts:
  * - USB line events (SOF, reset, suspend, resume, wakeup)
  * - control endpoint events (setup reception, end of data transfer, underflow, overflow, stall)
  * - bulk/interrupt/isochronous endpoints events (end of data transfer)
@@ -1567,7 +1567,7 @@ static void udd_ctrl_out_received(void)
 							udd_ctrl_payload_buf_cnt))) {
 		// End of reception because it is a short packet
 		// Before send ZLP, call intermediate callback
-		// in case of data receiv generate a stall
+		// in case of data receive generate a stall
 		udd_g_ctrlreq.payload_size = udd_ctrl_payload_buf_cnt;
 		if (NULL != udd_g_ctrlreq.over_under_run) {
 			if (!udd_g_ctrlreq.over_under_run()) {
@@ -1808,7 +1808,7 @@ static void udd_ep_trans_done(udd_ep_id_t ep)
 	}
 
 	if (ptr_job->buf_cnt != ptr_job->buf_size) {
-		// Need to send or receiv other data
+		// Need to send or receive other data
 		next_trans = ptr_job->buf_size - ptr_job->buf_cnt;
 
 		if (UDD_ENDPOINT_MAX_TRANS < next_trans) {

Marlin/src/HAL/ESP32/HAL.cpp

@@ -34,13 +34,13 @@
 
 #if ENABLED(WIFISUPPORT)
   #include <ESPAsyncWebServer.h>
-  #include "wifi.h"
+  #include "wifi/wifi.h"
   #if ENABLED(OTASUPPORT)
-    #include "ota.h"
+    #include "wifi/ota.h"
   #endif
   #if ENABLED(WEBSUPPORT)
-    #include "spiffs.h"
-    #include "web.h"
+    #include "wifi/spiffs.h"
+    #include "wifi/web.h"
   #endif
 #endif
 
@@ -175,8 +175,6 @@ uint8_t MarlinHAL::get_reset_source() { return rtc_get_reset_reason(1); }
 
 void MarlinHAL::reboot() { ESP.restart(); }
 
-void _delay_ms(const int ms) { delay(ms); }
-
 // return free memory between end of heap (or end bss) and whatever is current
 int MarlinHAL::freeMemory() { return ESP.getFreeHeap(); }
 
@@ -209,16 +207,17 @@ int MarlinHAL::freeMemory() { return ESP.getFreeHeap(); }
 // ADC
 // ------------------------
 
-#define ADC1_CHANNEL(pin) ADC1_GPIO ## pin ## _CHANNEL
-
+// https://docs.espressif.com/projects/esp-idf/en/release-v4.4/esp32/api-reference/peripherals/adc.html
 adc1_channel_t get_channel(int pin) {
   switch (pin) {
-    case 39: return ADC1_CHANNEL(39);
-    case 36: return ADC1_CHANNEL(36);
-    case 35: return ADC1_CHANNEL(35);
-    case 34: return ADC1_CHANNEL(34);
-    case 33: return ADC1_CHANNEL(33);
-    case 32: return ADC1_CHANNEL(32);
+    case 39: return ADC1_CHANNEL_3;
+    case 36: return ADC1_CHANNEL_0;
+    case 35: return ADC1_CHANNEL_7;
+    case 34: return ADC1_CHANNEL_6;
+    case 33: return ADC1_CHANNEL_5;
+    case 32: return ADC1_CHANNEL_4;
+    case 37: return ADC1_CHANNEL_1;
+    case 38: return ADC1_CHANNEL_2;
   }
   return ADC1_CHANNEL_MAX;
 }
@@ -243,12 +242,13 @@ void MarlinHAL::adc_init() {
   TERN_(HAS_TEMP_ADC_5,        adc1_set_attenuation(get_channel(TEMP_5_PIN), ADC_ATTEN_11db));
   TERN_(HAS_TEMP_ADC_6,        adc2_set_attenuation(get_channel(TEMP_6_PIN), ADC_ATTEN_11db));
   TERN_(HAS_TEMP_ADC_7,        adc3_set_attenuation(get_channel(TEMP_7_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_HEATED_BED,        adc1_set_attenuation(get_channel(TEMP_BED_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_CHAMBER,      adc1_set_attenuation(get_channel(TEMP_CHAMBER_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_PROBE,        adc1_set_attenuation(get_channel(TEMP_PROBE_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_COOLER,       adc1_set_attenuation(get_channel(TEMP_COOLER_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_BOARD,        adc1_set_attenuation(get_channel(TEMP_BOARD_PIN), ADC_ATTEN_11db));
-  TERN_(FILAMENT_WIDTH_SENSOR, adc1_set_attenuation(get_channel(FILWIDTH_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_TEMP_ADC_BED,      adc1_set_attenuation(get_channel(TEMP_BED_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_TEMP_ADC_CHAMBER,  adc1_set_attenuation(get_channel(TEMP_CHAMBER_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_TEMP_ADC_PROBE,    adc1_set_attenuation(get_channel(TEMP_PROBE_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_TEMP_ADC_COOLER,   adc1_set_attenuation(get_channel(TEMP_COOLER_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_TEMP_ADC_BOARD,    adc1_set_attenuation(get_channel(TEMP_BOARD_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_FILWIDTH_ADC,      adc1_set_attenuation(get_channel(FILWIDTH_PIN), ADC_ATTEN_11db));
+  TERN_(HAS_FILWIDTH2_ADC,     adc1_set_attenuation(get_channel(FILWIDTH2_PIN), ADC_ATTEN_11db));
 
   // Note that adc2 is shared with the WiFi module, which has higher priority, so the conversion may fail.
   // That's why we're not setting it up here.

Marlin/src/HAL/ESP32/HAL.h

@@ -37,11 +37,11 @@
 #include "i2s.h"
 
 #if ENABLED(WIFISUPPORT)
-  #include "WebSocketSerial.h"
+  #include "wifi/WebSocketSerial.h"
 #endif
 
 #if ENABLED(ESP3D_WIFISUPPORT)
-  #include "esp3dlib.h"
+  #include <esp3dlib.h>
 #endif
 
 #include "FlushableHardwareSerial.h"
@@ -64,10 +64,10 @@
 #define CRITICAL_SECTION_END()   portEXIT_CRITICAL(&hal.spinlock)
 
 #define HAL_CAN_SET_PWM_FREQ   // This HAL supports PWM Frequency adjustment
-#define PWM_FREQUENCY  1000u   // Default PWM frequency when set_pwm_duty() is called without set_pwm_frequency()
-#define PWM_RESOLUTION   10u   // Default PWM bit resolution
-#define CHANNEL_MAX_NUM  15u   // max PWM channel # to allocate (7 to only use low speed, 15 to use low & high)
-#define MAX_PWM_IOPIN    33u   // hardware pwm pins < 34
+#define PWM_FREQUENCY  1000U   // Default PWM frequency when set_pwm_duty() is called without set_pwm_frequency()
+#define PWM_RESOLUTION   10U   // Default PWM bit resolution
+#define CHANNEL_MAX_NUM  15U   // max PWM channel # to allocate (7 to only use low speed, 15 to use low & high)
+#define MAX_PWM_IOPIN    33U   // hardware pwm pins < 34
 #ifndef MAX_EXPANDER_BITS
   #define MAX_EXPANDER_BITS 32 // I2S expander bit width (max 32)
 #endif
@@ -165,8 +165,6 @@ int freeMemory();
 
 #pragma GCC diagnostic pop
 
-void _delay_ms(const int ms);
-
 // ------------------------
 // MarlinHAL Class
 // ------------------------
@@ -194,9 +192,9 @@ public:
   static void isr_on()  { if (spinlock.owner != portMUX_FREE_VAL) portEXIT_CRITICAL(&spinlock); }
   static void isr_off() { portENTER_CRITICAL(&spinlock); }
 
-  static void delay_ms(const int ms) { _delay_ms(ms); }
+  static void delay_ms(const int ms) { delay(ms); }
 
-  // Tasks, called from idle()
+  // Tasks, called from marlin.idle()
   static void idletask();
 
   // Reset

Marlin/src/HAL/ESP32/Servo.cpp

@@ -35,7 +35,7 @@ Servo::Servo() {}
 
 int8_t Servo::attach(const int inPin) {
   if (inPin > 0) pin = inPin;
-  channel = get_pwm_channel(pin, 50u, 16u);
+  channel = get_pwm_channel(pin, 50U, 16U);
   return channel; // -1 if no PWM avail.
 }
 

Marlin/src/HAL/ESP32/fastio.h

@@ -37,6 +37,10 @@
 // Set pin as output
 #define _SET_OUTPUT(IO)         pinMode(IO, OUTPUT)
 
+// TODO: Store set modes in an array and use those to get the mode
+#define _IS_OUTPUT(IO)           true
+#define _IS_INPUT(IO)            true
+
 // Set pin as input with pullup mode
 #define _PULLUP(IO, v)          pinMode(IO, v ? INPUT_PULLUP : INPUT)
 
@@ -70,6 +74,9 @@
 // Set pin as output and init
 #define OUT_WRITE(IO,V)         do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)
 
+#define IS_OUTPUT(IO)            _IS_OUTPUT(IO)
+#define IS_INPUT(IO)             _IS_INPUT(IO)
+
 // digitalRead/Write wrappers
 #define extDigitalRead(IO)      digitalRead(IO)
 #define extDigitalWrite(IO,V)   digitalWrite(IO,V)

Marlin/src/HAL/ESP32/i2s.cpp

@@ -145,7 +145,7 @@ static void IRAM_ATTR i2s_intr_handler_default(void *arg) {
 void stepperTask(void *parameter) {
   uint32_t nextMainISR = 0;
   #if ENABLED(LIN_ADVANCE)
-    uint32_t nextAdvanceISR = Stepper::LA_ADV_NEVER;
+    uint32_t nextAdvanceISR = stepper.LA_ADV_NEVER;
   #endif
 
   for (;;) {
@@ -167,13 +167,13 @@ void stepperTask(void *parameter) {
 
       if (!using_ftMotion) {
         if (!nextMainISR) {
-          Stepper::pulse_phase_isr();
-          nextMainISR = Stepper::block_phase_isr();
+          stepper.pulse_phase_isr();
+          nextMainISR = stepper.block_phase_isr();
         }
         #if ENABLED(LIN_ADVANCE)
           else if (!nextAdvanceISR) {
-            Stepper::advance_isr();
-            nextAdvanceISR = Stepper::la_interval;
+            stepper.advance_isr();
+            nextAdvanceISR = stepper.la_interval;
           }
         #endif
         else
@@ -182,10 +182,10 @@ void stepperTask(void *parameter) {
         nextMainISR--;
 
         #if ENABLED(LIN_ADVANCE)
-          if (nextAdvanceISR == Stepper::LA_ADV_NEVER)
-            nextAdvanceISR = Stepper::la_interval;
+          if (nextAdvanceISR == stepper.LA_ADV_NEVER)
+            nextAdvanceISR = stepper.la_interval;
 
-          if (nextAdvanceISR && nextAdvanceISR != Stepper::LA_ADV_NEVER)
+          if (nextAdvanceISR && nextAdvanceISR != stepper.LA_ADV_NEVER)
             nextAdvanceISR--;
         #endif
       }

Marlin/src/HAL/ESP32/pinsDebug.h

@@ -0,0 +1,71 @@
+/**
+ * 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
+
+#error "PINS_DEBUGGING is not yet supported for ESP32!"
+
+/**
+ * Pins Debugging for ESP32
+ *
+ *   - NUMBER_PINS_TOTAL
+ *   - MULTI_NAME_PAD
+ *   - getPinByIndex(index)
+ *   - printPinNameByIndex(index)
+ *   - getPinIsDigitalByIndex(index)
+ *   - digitalPinToAnalogIndex(pin)
+ *   - getValidPinMode(pin)
+ *   - isValidPin(pin)
+ *   - isAnalogPin(pin)
+ *   - digitalRead_mod(pin)
+ *   - pwm_status(pin)
+ *   - printPinPWM(pin)
+ *   - printPinPort(pin)
+ *   - printPinNumber(pin)
+ *   - printPinAnalog(pin)
+ */
+
+#define NUMBER_PINS_TOTAL NUM_DIGITAL_PINS
+#define MULTI_NAME_PAD 16 // space needed to be pretty if not first name assigned to a pin
+
+#define digitalRead_mod(P) extDigitalRead(P)
+#define printPinNameByIndex(x) do{ sprintf_P(buffer, PSTR("%-" STRINGIFY(MAX_NAME_LENGTH) "s"), pin_array[x].name); SERIAL_ECHO(buffer); }while(0)
+#define printPinNumber(P) do{ sprintf_P(buffer, PSTR("%02d"), P); SERIAL_ECHO(buffer); }while(0)
+#define printPinAnalog(P) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), digitalPinToAnalogIndex(P)); SERIAL_ECHO(buffer); }while(0)
+#define getPinByIndex(x) pin_array[x].pin
+#define getPinIsDigitalByIndex(x) pin_array[x].is_digital
+#define isValidPin(P) (P >= 0 && P < pin_t(NUMBER_PINS_TOTAL))
+#define digitalPinToAnalogIndex(P) int(P - analogInputToDigitalPin(0))
+#define isAnalogPin(P) WITHIN(P, pin_t(analogInputToDigitalPin(0)), pin_t(analogInputToDigitalPin(NUM_ANALOG_INPUTS - 1)))
+bool pwm_status(const pin_t) { return false; }
+
+void printPinPort(const pin_t) {}
+
+static bool getValidPinMode(const pin_t pin) {
+  return isValidPin(pin) && !IS_INPUT(pin);
+}
+
+void printPinPWM(const int32_t pin) {
+  if (pwm_status(pin)) {
+    //uint32_t chan = g_APinDescription[pin].ulPWMChannel TODO when fast pwm is operative;
+    //SERIAL_ECHOPGM("PWM = ", duty);
+  }
+}

Marlin/src/HAL/ESP32/spi_pins.h

@@ -21,7 +21,16 @@
  */
 #pragma once
 
-#define SD_SS_PIN   SDSS
-#define SD_SCK_PIN  18
-#define SD_MISO_PIN 19
-#define SD_MOSI_PIN 23
+#define PIN_SPI_SCK  18
+#define PIN_SPI_MISO 19
+#define PIN_SPI_MOSI 23
+
+#ifndef SD_SCK_PIN
+  #define SD_SCK_PIN  PIN_SPI_SCK
+#endif
+#ifndef SD_MISO_PIN
+  #define SD_MISO_PIN PIN_SPI_MISO
+#endif
+#ifndef SD_MOSI_PIN
+  #define SD_MOSI_PIN PIN_SPI_MOSI
+#endif

Marlin/src/HAL/ESP32/timers.cpp

@@ -78,8 +78,8 @@ void IRAM_ATTR timer_isr(void *para) {
 
 /**
  * Enable and initialize the timer
- * @param timer_num timer number to initialize
- * @param frequency frequency of the timer
+ * @param timer_num   timer number to initialize
+ * @param frequency   frequency of the timer
  */
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
   const tTimerConfig timer = timer_config[timer_num];
@@ -90,7 +90,7 @@ void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
   config.counter_en  = TIMER_PAUSE;
   config.alarm_en    = TIMER_ALARM_EN;
   config.intr_type   = TIMER_INTR_LEVEL;
-  config.auto_reload = true;
+  config.auto_reload = TIMER_AUTORELOAD_EN;
 
   // Select and initialize the timer
   timer_init(timer.group, timer.idx, &config);

Marlin/src/HAL/ESP32/timers.h

@@ -30,41 +30,46 @@
 #define FORCE_INLINE __attribute__((always_inline)) inline
 
 typedef uint64_t hal_timer_t;
-#define HAL_TIMER_TYPE_MAX 0xFFFFFFFFFFFFFFFFULL
+#define HAL_TIMER_TYPE_MAX 0xFFFF'FFFF'FFFF'FFFFULL
 
 #ifndef MF_TIMER_STEP
   #define MF_TIMER_STEP         0  // Timer Index for Stepper
 #endif
 #ifndef MF_TIMER_PULSE
-  #define MF_TIMER_PULSE        MF_TIMER_STEP
+  #define MF_TIMER_PULSE        MF_TIMER_STEP // Timer Index for Pulse interval
 #endif
 #ifndef MF_TIMER_TEMP
   #define MF_TIMER_TEMP         1  // Timer Index for Temperature
 #endif
 #ifndef MF_TIMER_PWM
-  #define MF_TIMER_PWM          2  // index of timer to use for PWM outputs
+  #define MF_TIMER_PWM          2  // Timer Index for PWM outputs
 #endif
 #ifndef MF_TIMER_TONE
-  #define MF_TIMER_TONE         3  // index of timer for beeper tones
+  #define MF_TIMER_TONE         3  // Timer Index for beeper tones
 #endif
 
-#define HAL_TIMER_RATE APB_CLK_FREQ // frequency of timer peripherals
+#define HAL_TIMER_RATE APB_CLK_FREQ // Frequency of timer peripherals
+
+#define TEMP_TIMER_PRESCALE    1000 // Prescaler for setting Temp Timer, 72Khz
+#define TEMP_TIMER_FREQUENCY   1000 // (Hz) Temperature ISR frequency
 
 #if ENABLED(I2S_STEPPER_STREAM)
   #define STEPPER_TIMER_PRESCALE     1
-  #define STEPPER_TIMER_RATE         250000                           // 250khz, 4µs pulses of i2s word clock
+  #define STEPPER_TIMER_RATE         250'000    // 250khz, 4µs pulses of i2s word clock
+  #define STEPPER_TIMER_TICKS_PER_US 0.25       // (MHz) Stepper Timer ticks per µs
 #else
   #define STEPPER_TIMER_PRESCALE     40
-  #define STEPPER_TIMER_RATE         ((HAL_TIMER_RATE) / (STEPPER_TIMER_PRESCALE)) // frequency of stepper timer, 2MHz
+  #define STEPPER_TIMER_RATE         ((HAL_TIMER_RATE) / (STEPPER_TIMER_PRESCALE))  // (Hz) Frequency of Stepper Timer ISR, 2MHz
+  #define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1'000'000UL)           // (MHz) Stepper Timer ticks per µs
 #endif
-#define STEPPER_TIMER_TICKS_PER_US   ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
 
 #define STEP_TIMER_MIN_INTERVAL   8 // minimum time in µs between stepper interrupts
 
-#define TONE_TIMER_PRESCALE    1000 // Arbitrary value, no idea what i'm doing here
+#define PULSE_TIMER_RATE            STEPPER_TIMER_RATE                              // (Hz) Frequency of Pulse Timer
+#define PULSE_TIMER_TICKS_PER_US    STEPPER_TIMER_TICKS_PER_US
+#define PULSE_TIMER_PRESCALE        STEPPER_TIMER_PRESCALE
 
-#define TEMP_TIMER_PRESCALE    1000 // prescaler for setting Temp timer, 72Khz
-#define TEMP_TIMER_FREQUENCY   1000 // temperature interrupt frequency
+#define TONE_TIMER_PRESCALE    1000 // Arbitrary value, no idea what i'm doing here
 
 #define PWM_TIMER_PRESCALE       10
 #if ENABLED(FAST_PWM_FAN)
@@ -74,13 +79,9 @@ typedef uint64_t hal_timer_t;
 #endif
 #define MAX_PWM_PINS             32 // Number of PWM pin-slots
 
-#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(MF_TIMER_STEP)
+#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 STEPPER_ISR_ENABLED()               HAL_timer_interrupt_enabled(MF_TIMER_STEP)
 
 #define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(MF_TIMER_TEMP)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(MF_TIMER_TEMP)
@@ -135,5 +136,5 @@ void HAL_timer_enable_interrupt(const uint8_t timer_num);
 void HAL_timer_disable_interrupt(const uint8_t timer_num);
 bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
 
-#define HAL_timer_isr_prologue(T) NOOP
-#define HAL_timer_isr_epilogue(T) NOOP
+inline void HAL_timer_isr_prologue(const uint8_t) {}
+inline void HAL_timer_isr_epilogue(const uint8_t) {}

Marlin/src/HAL/ESP32/u8g_esp32_spi.cpp

@@ -35,7 +35,7 @@
 #if HAS_MEDIA
   #include "../../sd/cardreader.h"
   #if ENABLED(ESP3D_WIFISUPPORT)
-    #include "sd_ESP32.h"
+    #include <sd_ESP32.h>
   #endif
 #endif
 

Marlin/src/HAL/ESP32/wifi/WebSocketSerial.cpp

@@ -21,7 +21,7 @@
  */
 #ifdef ARDUINO_ARCH_ESP32
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if ENABLED(WIFISUPPORT)
 

Marlin/src/HAL/ESP32/wifi/WebSocketSerial.h

@@ -21,8 +21,8 @@
  */
 #pragma once
 
-#include "../../inc/MarlinConfig.h"
-#include "../../core/serial_hook.h"
+#include "../../../inc/MarlinConfig.h"
+#include "../../../core/serial_hook.h"
 
 #include <Stream.h>
 

Marlin/src/HAL/ESP32/wifi/ota.cpp

@@ -22,11 +22,15 @@
 
 #ifdef ARDUINO_ARCH_ESP32
 
-#include "../../inc/MarlinConfigPre.h"
+#include <WiFi.h>
+
+#undef ENABLED
+#undef DISABLED
+
+#include "../../../inc/MarlinConfigPre.h"
 
 #if ALL(WIFISUPPORT, OTASUPPORT)
 
-#include <WiFi.h>
 #include <ESPmDNS.h>
 #include <WiFiUdp.h>
 #include <ArduinoOTA.h>

Marlin/src/HAL/ESP32/wifi/spiffs.cpp

@@ -21,11 +21,11 @@
  */
 #ifdef ARDUINO_ARCH_ESP32
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if ALL(WIFISUPPORT, WEBSUPPORT)
 
-#include "../../core/serial.h"
+#include "../../../core/serial.h"
 
 #include <FS.h>
 #include <SPIFFS.h>

Marlin/src/HAL/ESP32/wifi/web.cpp

@@ -21,11 +21,11 @@
  */
 #ifdef ARDUINO_ARCH_ESP32
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if ALL(WIFISUPPORT, WEBSUPPORT)
 
-#include "../../inc/MarlinConfig.h"
+#include "../../../inc/MarlinConfig.h"
 
 #undef DISABLED  // esp32-hal-gpio.h
 #include <SPIFFS.h>

Marlin/src/HAL/ESP32/wifi/wifi.cpp

@@ -21,11 +21,12 @@
  */
 #ifdef ARDUINO_ARCH_ESP32
 
-#include "../../core/serial.h"
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../inc/MarlinConfigPre.h"
 
 #if ENABLED(WIFISUPPORT)
 
+#include "../../../core/serial.h"
+
 #include <WiFi.h>
 #include <ESPmDNS.h>
 #include <ESPAsyncWebServer.h>

Marlin/src/HAL/GD32_MFL/HAL.cpp

@@ -0,0 +1,123 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+#include "../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../inc/MarlinConfig.h"
+#include "../shared/Delay.h"
+
+uint16_t MarlinHAL::adc_result;
+
+#if ENABLED(POSTMORTEM_DEBUGGING)
+  extern void install_min_serial();
+#endif
+
+#if ENABLED(MARLIN_DEV_MODE)
+  // Dump the clock frequencies of the system, AHB, APB1, APB2, and F_CPU.
+  static inline void HAL_clock_frequencies_dump() {
+    auto& rcuInstance = rcu::RCU::get_instance();
+    uint32_t freq = rcuInstance.get_clock_frequency(rcu::Clock_Frequency::CK_SYS);
+    SERIAL_ECHOPGM("\nSYSTEM_CLOCK=", freq);
+    freq = rcuInstance.get_clock_frequency(rcu::Clock_Frequency::CK_AHB);
+    SERIAL_ECHOPGM("\nABH_CLOCK=", freq);
+    freq = rcuInstance.get_clock_frequency(rcu::Clock_Frequency::CK_APB1);
+    SERIAL_ECHOPGM("\nAPB1_CLOCK=", freq);
+    freq = rcuInstance.get_clock_frequency(rcu::Clock_Frequency::CK_APB2);
+    SERIAL_ECHOPGM("\nAPB2_CLOCK=", freq,
+    "\nF_CPU=", F_CPU);
+    // Done
+    SERIAL_ECHOPGM("\n--\n");
+  }
+#endif  // MARLIN_DEV_MODE
+
+// Initializes the Marlin HAL
+void MarlinHAL::init() {
+  // Ensure F_CPU is a constant expression.
+  // If the compiler breaks here, it means that delay code that should compute at compile time will not work.
+  // So better safe than sorry here.
+  constexpr unsigned int cpuFreq = F_CPU;
+  UNUSED(cpuFreq);
+
+  #if PIN_EXISTS(LED)
+    OUT_WRITE(LED_PIN, LOW);
+  #endif
+
+  SetTimerInterruptPriorities();
+
+  // Print clock frequencies to host serial
+  TERN_(MARLIN_DEV_MODE, HAL_clock_frequencies_dump());
+
+  // Register min serial
+  TERN_(POSTMORTEM_DEBUGGING, install_min_serial());
+}
+
+// Returns the reset source based on the flags set in the RCU module
+uint8_t MarlinHAL::get_reset_source() {
+  return
+    (RCU_I.get_flag(rcu::Status_Flags::FLAG_FWDGTRST)) ? RST_WATCHDOG :
+    (RCU_I.get_flag(rcu::Status_Flags::FLAG_SWRST)) ? RST_SOFTWARE :
+    (RCU_I.get_flag(rcu::Status_Flags::FLAG_EPRST)) ? RST_EXTERNAL :
+    (RCU_I.get_flag(rcu::Status_Flags::FLAG_PORRST)) ? RST_POWER_ON :
+    (RCU_I.get_flag(rcu::Status_Flags::FLAG_LPRST)) ? RST_BROWN_OUT :
+    0;
+}
+
+// Returns the amount of free memory available in bytes
+int MarlinHAL::freeMemory() {
+  volatile char top;
+  return &top - reinterpret_cast<char*>(_sbrk(0));
+}
+
+// Watchdog Timer
+#if ENABLED(USE_WATCHDOG)
+  #define WDT_TIMEOUT_US  TERN(WATCHDOG_DURATION_8S, 8000000, 4000000)  // 4 or 8 second timeout
+
+  #include <FWatchdogTimer.h>
+
+  FWatchdogTimer& watchdogTimer = FWatchdogTimer::get_instance();
+
+  // Initializes the watchdog timer
+  void MarlinHAL::watchdog_init() {
+    IF_DISABLED(DISABLE_WATCHDOG_INIT, watchdogTimer.begin(WDT_TIMEOUT_US));
+  }
+
+  // Refreshes the watchdog timer to prevent system reset
+  void MarlinHAL::watchdog_refresh() {
+    watchdogTimer.reload();
+    #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
+      TOGGLE(LED_PIN);  // Heartbeat indicator
+    #endif
+  }
+#endif
+
+extern "C" {
+  extern unsigned int _ebss;  // End of bss section
+}
+
+// Resets the system to initiate a firmware flash.
+WEAK void flashFirmware(const int16_t) {
+  hal.reboot();
+}
+
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/HAL.h

@@ -0,0 +1,160 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+#define CPU_32_BIT
+
+#include "../../core/macros.h"
+#include "../shared/Marduino.h"
+#include "../shared/math_32bit.h"
+#include "../shared/HAL_SPI.h"
+
+#include "temp_soc.h"
+#include "fastio.h"
+#include "Servo.h"
+
+#include "../../inc/MarlinConfigPre.h"
+
+#include <stdint.h>
+#include <GPIO.hpp>
+#include <AFIO.hpp>
+
+// Default graphical display delays
+#define CPU_ST7920_DELAY_1 300
+#define CPU_ST7920_DELAY_2  40
+#define CPU_ST7920_DELAY_3 340
+
+// Serial Ports
+#include "MarlinSerial.h"
+
+// Interrupts
+#define CRITICAL_SECTION_START()  const bool irqon = !__get_PRIMASK(); __disable_irq()
+#define CRITICAL_SECTION_END()    if (irqon) __enable_irq()
+
+#define cli() __disable_irq()
+#define sei() __enable_irq()
+
+// Alias of __bss_end__
+#define __bss_end __bss_end__
+
+// Types
+typedef double isr_float_t; // FPU ops are used for single-precision, so use double for ISRs.
+typedef uint8_t pin_t;      // Parity with mfl platform
+
+// Servo
+class libServo;
+typedef libServo hal_servo_t;
+#define PAUSE_SERVO_OUTPUT()  libServo::pause_all_servos()
+#define RESUME_SERVO_OUTPUT() libServo::resume_all_servos()
+
+// Debugging
+#define JTAG_DISABLE()    AFIO_I.set_remap(gpio::Pin_Remap_Select::SWJ_DP_ONLY_REMAP)
+#define JTAGSWD_DISABLE() AFIO_I.set_remap(gpio::Pin_Remap_Select::SWJ_ALL_DISABLED_REMAP)
+#define JTAGSWD_RESET()   AFIO_I.set_remap(gpio::Pin_Remap_Select::FULL_SWJ_REMAP)
+
+// ADC
+#ifdef ADC_RESOLUTION
+  #define HAL_ADC_RESOLUTION  ADC_RESOLUTION
+#else
+  #define HAL_ADC_RESOLUTION  12
+#endif
+
+#define HAL_ADC_VREF_MV   3300
+
+// Disable Marlin's software oversampling.
+// The MFL framework uses 16x hardware oversampling by default
+#ifdef GD32F303RE
+  #define HAL_ADC_FILTERED
+#endif
+
+#define GET_PIN_MAP_PIN(index)        index
+#define GET_PIN_MAP_INDEX(pin)        pin
+#define PARSED_PIN_INDEX(code, dval)  parser.intval(code, dval)
+
+#ifndef PLATFORM_M997_SUPPORT
+  #define PLATFORM_M997_SUPPORT
+#endif
+
+void flashFirmware(const int16_t);
+
+#define HAL_CAN_SET_PWM_FREQ    // This HAL supports PWM Frequency adjustment
+
+extern "C" char* _sbrk(int incr);
+extern "C" char* dtostrf(double val, signed char width, unsigned char prec, char* sout);
+
+// MarlinHAL Class
+class MarlinHAL {
+public:
+  // Before setup()
+  MarlinHAL() = default;
+
+  // 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() { NVIC_SystemReset(); }    // restart the firmware from 0x0
+
+  // Interrupts
+  static bool isr_state() { return !__get_PRIMASK(); }
+  static void isr_on() { sei(); }
+  static void isr_off() { cli(); }
+  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() { RCU_I.clear_all_reset_flags(); }
+
+  // Free SRAM
+  static int freeMemory();
+
+  // ADC methods
+  static uint16_t adc_result;
+
+  // Called by Temperature::init once at startup
+  static void adc_init() { analogReadResolution(HAL_ADC_RESOLUTION); }
+
+  // Called by Temperature::init for each sensor at startup
+  static void adc_enable(const pin_t pin) { pinMode(pin, INPUT); }
+
+  // Called from Temperature::isr to start ADC sampling on the given pin
+  static void adc_start(const pin_t pin) { adc_result = static_cast<uint16_t>(analogRead(pin)); }
+
+  // Check if ADC is ready for reading
+  static bool adc_ready() { return true; }
+
+  // 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.
+  // Optionally invert the duty cycle [default = false]
+  // Optionally change the maximum size of the provided value to enable finer PWM duty control [default = 255]
+  static void set_pwm_duty(const pin_t pin, const uint16_t value, const uint16_t scale = 255U, const bool invert = false);
+
+  // Set the frequency of the timer for the given pin.
+  // All Timer PWM pins run at the same frequency.
+  static void set_pwm_frequency(const pin_t pin, const uint16_t f_desired);
+};

Marlin/src/HAL/GD32_MFL/MarlinSPI.h

@@ -0,0 +1,26 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/GD32_MFL/MarlinSerial.cpp

@@ -0,0 +1,97 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+#include "../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../inc/MarlinConfig.h"
+#include "MarlinSerial.h"
+
+#if ENABLED(EMERGENCY_PARSER)
+  #include "../../feature/e_parser.h"
+#endif
+
+using namespace arduino;
+
+auto MarlinSerial::get_instance(usart::USART_Base Base, pin_size_t rxPin, pin_size_t txPin) -> MarlinSerial& {
+  auto& serial = UsartSerial::get_instance(Base, rxPin, txPin);
+  return *reinterpret_cast<MarlinSerial*>(&serial);
+}
+
+#if USING_HW_SERIAL0
+  MSerialT MSerial0(true, MarlinSerial::get_instance(usart::USART_Base::USART0_BASE, NO_PIN, NO_PIN));
+#endif
+#if USING_HW_SERIAL1
+  MSerialT MSerial1(true, MarlinSerial::get_instance(usart::USART_Base::USART1_BASE, NO_PIN, NO_PIN));
+#endif
+#if USING_HW_SERIAL2
+  MSerialT MSerial2(true, MarlinSerial::get_instance(usart::USART_Base::USART2_BASE, NO_PIN, NO_PIN));
+#endif
+#if USING_HW_SERIAL3
+  MSerialT MSerial3(true, MarlinSerial::get_instance(usart::USART_Base::UART3_BASE, NO_PIN, NO_PIN));
+#endif
+#if USING_HW_SERIAL4
+  MSerialT MSerial4(true, MarlinSerial::get_instance(usart::USART_Base::UART4_BASE, NO_PIN, NO_PIN));
+#endif
+
+#if ENABLED(EMERGENCY_PARSER)
+  // This callback needs to access the specific MarlinSerial instance
+  // We'll use a static pointer to track the current instance
+  static MarlinSerial* current_serial_instance = nullptr;
+
+  static void emergency_callback() {
+    if (!current_serial_instance) return;
+    const auto last_data = current_serial_instance->get_last_data();
+    emergency_parser.update(current_serial_instance->emergency_state, last_data);
+  }
+
+  void MarlinSerial::register_emergency_callback(void (*callback)()) {
+    usart_.register_interrupt_callback(usart::Interrupt_Type::INTR_RBNEIE, callback);
+  }
+#endif
+
+void MarlinSerial::begin(unsigned long baudrate, uint16_t config) {
+  UsartSerial::begin(baudrate, config, ENABLED(SERIAL_DMA));
+  #if ENABLED(EMERGENCY_PARSER) && DISABLED(SERIAL_DMA)
+    current_serial_instance = this;
+    register_emergency_callback(emergency_callback);
+  #endif
+}
+
+void MarlinSerial::updateRxDmaBuffer() {
+  #if ENABLED(EMERGENCY_PARSER)
+    // Get the number of bytes available in the receive buffer
+    const size_t available_bytes = usart_.available_for_read(true);
+
+    // Process only the available data
+    for (size_t i = 0; i < available_bytes; ++i) {
+      uint8_t data;
+      if (usart_.read_rx_buffer(data))
+        emergency_parser.update(emergency_state, data);
+    }
+  #endif
+  // Call the base class implementation to handle any additional updates
+  UsartSerial::updateRxDmaBuffer();
+}
+
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/MarlinSerial.h

@@ -0,0 +1,75 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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 "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(EMERGENCY_PARSER)
+  #include "../../feature/e_parser.h"
+#endif
+
+#include <UsartSerial.hpp>
+
+#include "../../core/serial_hook.h"
+
+#define SERIAL_INDEX_MIN 0
+#define SERIAL_INDEX_MAX 4
+
+#include "../shared/serial_ports.h"
+
+#if defined(LCD_SERIAL_PORT) && ANY(HAS_DGUS_LCD, EXTENSIBLE_UI)
+  #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.availableForWrite()
+#endif
+
+using namespace arduino;
+
+struct MarlinSerial : public UsartSerial {
+  static auto get_instance(usart::USART_Base Base, pin_size_t rxPin = NO_PIN, pin_size_t txPin = NO_PIN) -> MarlinSerial&;
+
+  void begin(unsigned long baudrate, uint16_t config);
+  inline void begin(unsigned long baudrate) { begin(baudrate, SERIAL_8N1); }
+  void updateRxDmaBuffer();
+
+  #if DISABLED(SERIAL_DMA)
+    FORCE_INLINE static uint8_t buffer_overruns() { return 0; }
+  #endif
+
+  #if ENABLED(EMERGENCY_PARSER)
+    EmergencyParser::State emergency_state;
+
+    // Accessor method to get the last received byte
+    auto get_last_data() -> uint8_t { return usart_.get_last_data(); }
+
+    // Register the emergency callback
+    void register_emergency_callback(void (*callback)());
+  #endif
+
+protected:
+  using UsartSerial::UsartSerial;
+};
+
+typedef Serial1Class<MarlinSerial> MSerialT;
+extern MSerialT MSerial0;
+extern MSerialT MSerial1;
+extern MSerialT MSerial2;
+extern MSerialT MSerial3;
+extern MSerialT MSerial4;

Marlin/src/HAL/GD32_MFL/MinSerial.cpp

@@ -0,0 +1,163 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+#include "../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(POSTMORTEM_DEBUGGING)
+#include "../shared/MinSerial.h"
+
+// Base addresses for USART peripherals
+static constexpr uintptr_t USART_base[] = {
+  0x40013800, // USART0
+  0x40004400, // USART1
+  0x40004800, // USART2
+  0x40004C00, // UART3
+  0x40005000  // UART4
+};
+
+// Register offsets
+static constexpr uint32_t STAT0_OFFSET = 0x00U;
+static constexpr uint32_t DATA_OFFSET = 0x04U;
+static constexpr uint32_t BAUD_OFFSET = 0x08U;
+static constexpr uint32_t CTL0_OFFSET = 0x0CU;
+static constexpr uint32_t CTL1_OFFSET = 0x14U;
+
+// Bit positions
+static constexpr uint32_t TBE_BIT = 7;
+static constexpr uint32_t TEN_BIT = 3;
+static constexpr uint32_t UEN_BIT = 13;
+
+// NVIC interrupt numbers for USART
+static constexpr int nvicUART[] = { 37, 38, 39, 52, 53 };
+
+// RCU PCLK values for USART
+static constexpr rcu::RCU_PCLK clockRegs[] = {
+  rcu::RCU_PCLK::PCLK_USART0,
+  rcu::RCU_PCLK::PCLK_USART1,
+  rcu::RCU_PCLK::PCLK_USART2,
+  rcu::RCU_PCLK::PCLK_UART3,
+  rcu::RCU_PCLK::PCLK_UART4
+};
+
+// Memory barrier instructions
+#define isb() __asm__ __volatile__ ("isb" : : : "memory")
+#define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
+#define sw_barrier() __asm__ volatile("" : : : "memory")
+
+// Direct register access macros
+#define USART_REG(offset) (*(volatile uint32_t*)(USART_base[SERIAL_PORT] + (offset)))
+#define USART_STAT0 USART_REG(STAT0_OFFSET)
+#define USART_DATA  USART_REG(DATA_OFFSET)
+#define USART_BAUD  USART_REG(BAUD_OFFSET)
+#define USART_CTL0  USART_REG(CTL0_OFFSET)
+#define USART_CTL1  USART_REG(CTL1_OFFSET)
+
+// Bit manipulation macros
+#define READ_BIT(reg, bit) (((reg) >> (bit)) & 1U)
+#define SET_BIT(reg, bit) ((reg) |= (1U << (bit)))
+#define CLEAR_BIT(reg, bit) ((reg) &= ~(1U << (bit)))
+
+// Initializes the MinSerial interface.
+// This function sets up the USART interface for serial communication.
+// If the selected serial port is not a hardware port, it disables the severe error reporting feature.
+static void MinSerialBegin() {
+  #if !WITHIN(SERIAL_PORT, 0, 4)
+    #warning "Using POSTMORTEM_DEBUGGING requires a physical U(S)ART hardware in case of severe error."
+    #warning "Disabling the severe error reporting feature currently because the used serial port is not a HW port."
+  #else
+    int nvicIndex = nvicUART[SERIAL_PORT];
+
+    // NVIC base address for interrupt disable
+    struct NVICMin {
+      volatile uint32_t ISER[32];
+      volatile uint32_t ICER[32];
+    };
+    NVICMin *nvicBase = (NVICMin*)0xE000E100;
+
+    SBI32(nvicBase->ICER[nvicIndex >> 5], nvicIndex & 0x1F);
+
+    // We require memory barriers to properly disable interrupts
+    // (https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the)
+    dsb();
+    isb();
+
+    // Get the RCU PCLK for this USART
+    rcu::RCU_PCLK pclk = clockRegs[SERIAL_PORT];
+
+    // Disable then enable usart peripheral clocks
+    rcu::RCU_DEVICE.set_pclk_enable(pclk, false);
+    rcu::RCU_DEVICE.set_pclk_enable(pclk, true);
+
+    // Save current baudrate
+    uint32_t baudrate = USART_BAUD;
+
+    // Reset USART control registers
+    USART_CTL0 = 0;
+    USART_CTL1 = 0; // 1 stop bit
+
+    // Restore baudrate
+    USART_BAUD = baudrate;
+
+    // Enable transmitter and USART (8 bits, no parity, 1 stop bit)
+    SET_BIT(USART_CTL0, TEN_BIT);
+    SET_BIT(USART_CTL0, UEN_BIT);
+  #endif
+}
+
+// Writes a single character to the serial port.
+static void MinSerialWrite(char c) {
+  #if WITHIN(SERIAL_PORT, 0, 4)
+    // Wait until transmit buffer is empty
+    while (!READ_BIT(USART_STAT0, TBE_BIT)) {
+      hal.watchdog_refresh();
+      sw_barrier();
+    }
+    // Write character to data register
+    USART_DATA = c;
+  #endif
+}
+
+// Installs the minimum serial interface.
+// Sets the HAL_min_serial_init and HAL_min_serial_out function pointers to MinSerialBegin and MinSerialWrite respectively.
+void install_min_serial() {
+  HAL_min_serial_init = &MinSerialBegin;
+  HAL_min_serial_out = &MinSerialWrite;
+}
+
+extern "C" {
+  // A low-level assembly-based jump handler.
+  // Unconditionally branches to the CommonHandler_ASM function.
+  __attribute__((naked, aligned(4))) void JumpHandler_ASM() {
+    __asm__ __volatile__ ("b CommonHandler_ASM\n");
+  }
+  void __attribute__((naked, alias("JumpHandler_ASM"), nothrow)) HardFault_Handler();
+  void __attribute__((naked, alias("JumpHandler_ASM"), nothrow)) BusFault_Handler();
+  void __attribute__((naked, alias("JumpHandler_ASM"), nothrow)) UsageFault_Handler();
+  void __attribute__((naked, alias("JumpHandler_ASM"), nothrow)) MemManage_Handler();
+  void __attribute__((naked, alias("JumpHandler_ASM"), nothrow)) NMI_Handler();
+}
+
+#endif // POSTMORTEM_DEBUGGING
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/README.md

@@ -0,0 +1,9 @@
+# Generic GD32 HAL based on the MFL Arduino Core
+
+This HAL is eventually intended to act as the generic HAL for all GD32 chips using the MFL library.
+
+Currently it supports:
+
+- GD32F303RET6
+
+Targeting the official [MFL Arduino Core](https://github.com/bnmguy/ArduinoCore_MFL).

Marlin/src/HAL/GD32_MFL/Servo.cpp

@@ -0,0 +1,125 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+#include "../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../inc/MarlinConfig.h"
+
+#if HAS_SERVOS
+
+#include "Servo.h"
+
+static uint_fast8_t servoCount = 0;
+static libServo* servos[NUM_SERVOS] = {0};
+constexpr millis_t servoDelay[] = SERVO_DELAY;
+static_assert(COUNT(servoDelay) == NUM_SERVOS, "SERVO_DELAY must be an array NUM_SERVOS long.");
+
+// Initialize to the default timer priority. This will be overridden by a call from timers.cpp.
+// This allows all timer interrupt priorities to be managed from a single location in the HAL.
+static uint32_t servo_interrupt_priority = NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 12, 0);
+
+// This must be called after the MFL Servo class has initialized the timer.
+// To be safe this is currently called after every call to attach().
+static void fixServoTimerInterruptPriority() {
+  auto& servoTimerIdx = GeneralTimer::get_instance(static_cast<timer::TIMER_Base>(TIMER_SERVO));
+  NVIC_SetPriority(servoTimerIdx.getTimerUpIRQ(), servo_interrupt_priority);
+}
+
+// Default constructor for libServo class.
+// Initializes the servo delay, pause state, and pause value.
+// Registers the servo instance in the servos array.
+libServo::libServo() :
+  delay(servoDelay[servoCount]),
+  was_attached_before_pause(false),
+  value_before_pause(0)
+{
+  servos[servoCount++] = this;
+}
+
+// Attaches a servo to a specified pin.
+int8_t libServo::attach(const int pin) {
+  if (servoCount >= MAX_SERVOS) return -1;
+  if (pin > 0) servoPin = pin;
+  auto result = mflServo.attach(servoPin);
+  fixServoTimerInterruptPriority();
+  return result;
+}
+
+// Attaches a servo to a specified pin with minimum and maximum pulse widths.
+int8_t libServo::attach(const int pin, const int min, const int max) {
+  if (servoCount >= MAX_SERVOS) return -1;
+  if (pin > 0) servoPin = pin;
+  auto result = mflServo.attach(servoPin, min, max);
+  fixServoTimerInterruptPriority();
+  return result;
+}
+
+// Moves the servo to a specified position.
+void libServo::move(const int value) {
+  if (attach(0) >= 0) {
+    mflServo.write(value);
+    safe_delay(delay);
+    TERN_(DEACTIVATE_SERVOS_AFTER_MOVE, detach());
+  }
+}
+
+// Pause the servo by detaching it and storing its current state.
+void libServo::pause() {
+  was_attached_before_pause = mflServo.attached();
+  if (was_attached_before_pause) {
+    value_before_pause = mflServo.read();
+    mflServo.detach();
+  }
+}
+
+// Resume a previously paused servo.
+// If the servo was attached before the pause, this function re-attaches
+// the servo and moves it to the position it was in before the pause.
+void libServo::resume() {
+  if (was_attached_before_pause) {
+    attach();
+    move(value_before_pause);
+  }
+}
+
+// Pause all servos by stopping their timers.
+void libServo::pause_all_servos() {
+  for (auto& servo : servos)
+    if (servo) servo->pause();
+}
+
+// Resume all paused servos by starting their timers.
+void libServo::resume_all_servos() {
+  for (auto& servo : servos)
+    if (servo) servo->resume();
+}
+
+// Set the interrupt priority for the servo.
+// @param preemptPriority The preempt priority level.
+// @param subPriority The sub priority level.
+void libServo::setInterruptPriority(uint32_t preemptPriority, uint32_t subPriority) {
+  servo_interrupt_priority = NVIC_EncodePriority(NVIC_GetPriorityGrouping(), preemptPriority, subPriority);
+}
+
+#endif // HAS_SERVOS
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/Servo.h

@@ -0,0 +1,56 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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 <Servo.h>
+
+#include "../../core/millis_t.h"
+
+// Inherit and expand on the official library
+class libServo {
+public:
+  libServo();
+
+  int8_t attach(const int pin = 0); // pin == 0 uses value from previous call
+  int8_t attach(const int pin, const int min, const int max);
+  void detach() { mflServo.detach(); }
+
+  int read() { return mflServo.read(); }
+  void move(const int value);
+
+  void pause();
+  void resume();
+
+  static void pause_all_servos();
+  static void resume_all_servos();
+
+  static void setInterruptPriority(uint32_t preemptPriority, uint32_t subPriority);
+
+private:
+  Servo mflServo;
+
+  int servoPin = 0;
+  millis_t delay = 0;
+
+  bool was_attached_before_pause;
+  int value_before_pause;
+};

Marlin/src/HAL/GD32_MFL/dogm/u8g_com_mfl_swspi.cpp

@@ -0,0 +1,129 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm / Ryan Power
+ *
+ * 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_MFL
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ALL(HAS_MARLINUI_U8GLIB, FORCE_SOFT_SPI)
+
+#include <U8glib-HAL.h>
+#include "../../shared/HAL_SPI.h"
+
+#define nop asm volatile ("\tnop\n")
+
+static inline uint8_t swSpiTransfer_mode_0(uint8_t b) {
+  for (uint8_t i = 0; i < 8; ++i) {
+    const uint8_t state = (b & 0x80) ? HIGH : LOW;
+    WRITE(DOGLCD_SCK, HIGH);
+    WRITE(DOGLCD_MOSI, state);
+    b <<= 1;
+    WRITE(DOGLCD_SCK, LOW);
+  }
+  return b;
+}
+
+static inline uint8_t swSpiTransfer_mode_3(uint8_t b) {
+  for (uint8_t i = 0; i < 8; ++i) {
+    const uint8_t state = (b & 0x80) ? HIGH : LOW;
+    WRITE(DOGLCD_SCK, LOW);
+    WRITE(DOGLCD_MOSI, state);
+    b <<= 1;
+    WRITE(DOGLCD_SCK, HIGH);
+  }
+  return b;
+}
+
+static void u8g_sw_spi_shift_out(uint8_t val) {
+  #if U8G_SPI_USE_MODE_3
+    swSpiTransfer_mode_3(val);
+  #else
+    swSpiTransfer_mode_0(val);
+  #endif
+}
+
+static void swSpiInit() {
+  #if PIN_EXISTS(LCD_RESET)
+    SET_OUTPUT(LCD_RESET_PIN);
+  #endif
+  SET_OUTPUT(DOGLCD_A0);
+  OUT_WRITE(DOGLCD_SCK, LOW);
+  OUT_WRITE(DOGLCD_MOSI, LOW);
+  OUT_WRITE(DOGLCD_CS, HIGH);
+}
+
+uint8_t u8g_com_HAL_MFL_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
+  switch (msg) {
+    case U8G_COM_MSG_INIT:
+      swSpiInit();
+      break;
+    case U8G_COM_MSG_STOP:
+      break;
+    case U8G_COM_MSG_RESET:
+      #if PIN_EXISTS(LCD_RESET)
+        WRITE(LCD_RESET_PIN, arg_val);
+      #endif
+      break;
+    case U8G_COM_MSG_CHIP_SELECT:
+      #if U8G_SPI_USE_MODE_3        // This LCD SPI is running mode 3 while SD card is running mode 0
+        if (arg_val) {              // SCK idle state needs to be set to the proper idle state before
+                                    // the next chip select goes active
+          WRITE(DOGLCD_SCK, HIGH);  // Set SCK to mode 3 idle state before CS goes active
+          WRITE(DOGLCD_CS, LOW);
+          nop;                      // Hold SCK high for a few ns
+          nop;
+         }
+        else {
+          WRITE(DOGLCD_CS, HIGH);
+          WRITE(DOGLCD_SCK, LOW);   // Set SCK to mode 0 idle state after CS goes inactive
+        }
+      #else
+        WRITE(DOGLCD_CS, !arg_val);
+      #endif
+      break;
+    case U8G_COM_MSG_WRITE_BYTE:
+      u8g_sw_spi_shift_out(arg_val);
+      break;
+    case U8G_COM_MSG_WRITE_SEQ: {
+      uint8_t* ptr = (uint8_t*)arg_ptr;
+      while (arg_val > 0) {
+        u8g_sw_spi_shift_out(*ptr++);
+        arg_val--;
+      }
+    } break;
+    case U8G_COM_MSG_WRITE_SEQ_P: {
+      uint8_t* ptr = (uint8_t*)arg_ptr;
+      while (arg_val > 0) {
+        u8g_sw_spi_shift_out(u8g_pgm_read(ptr));
+        ptr++;
+        arg_val--;
+      }
+    } break;
+    case U8G_COM_MSG_ADDRESS:       // Define cmd (arg_val = 0) or data mode (arg_val = 1)
+      WRITE(DOGLCD_A0, arg_val);
+      break;
+  }
+  return 1;
+}
+
+#endif // HAS_MARLINUI_U8GLIB && FORCE_SOFT_SPI
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/eeprom/eeprom_bl24cxx.cpp

@@ -0,0 +1,93 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+/**
+ * PersistentStore for Arduino-style EEPROM interface
+ * with simple implementations supplied by Marlin.
+ */
+
+#include "../../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ENABLED(IIC_BL24CXX_EEPROM)
+
+#include "../../shared/eeprom_if.h"
+#include "../../shared/eeprom_api.h"
+
+#ifndef MARLIN_EEPROM_SIZE
+  #error "MARLIN_EEPROM_SIZE is required for IIC_BL24CXX_EEPROM."
+#endif
+
+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 v = *value;
+    uint8_t * const p = (uint8_t * const)REAL_EEPROM_ADDR(pos);
+    // EPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
+      eeprom_write_byte(p, v);
+      if (++written & 0x7F) delay(2); else safe_delay(2);
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        return true;
+      }
+    }
+
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  }
+
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  do {
+    const uint8_t c = eeprom_read_byte((uint8_t*)REAL_EEPROM_ADDR(pos));
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+
+  return false;
+}
+
+#endif // IIC_BL24CXX_EEPROM
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/eeprom/eeprom_if_iic.cpp

@@ -0,0 +1,54 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+/**
+ * Platform-independent Arduino functions for I2C EEPROM.
+ * Enable USE_SHARED_EEPROM if not supplied by the framework.
+ */
+
+#include "../../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ENABLED(IIC_BL24CXX_EEPROM)
+
+#include "../../../libs/BL24CXX.h"
+#include "../../shared/eeprom_if.h"
+
+void eeprom_init() {
+  BL24CXX::init();
+}
+
+void eeprom_write_byte(uint8_t *pos, uint8_t value) {
+  const unsigned eeprom_address = (unsigned)pos;
+  BL24CXX::writeOneByte(eeprom_address, value);
+}
+
+uint8_t eeprom_read_byte(uint8_t *pos) {
+  const unsigned eeprom_address = (unsigned)pos;
+  return BL24CXX::readOneByte(eeprom_address);
+}
+
+#endif // IIC_BL24CXX_EEPROM
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/eeprom/eeprom_wired.cpp

@@ -0,0 +1,96 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+#include "../../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../../inc/MarlinConfig.h"
+
+#if USE_WIRED_EEPROM
+
+/**
+ * PersistentStore for Arduino-style EEPROM interface
+ * with simple implementations supplied by Marlin.
+ */
+
+#include "../../shared/eeprom_if.h"
+#include "../../shared/eeprom_api.h"
+
+#ifndef MARLIN_EEPROM_SIZE
+  #define MARLIN_EEPROM_SIZE size_t(E2END + 1)
+#endif
+
+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 v = *value;
+    uint8_t * const p = (uint8_t * const)REAL_EEPROM_ADDR(pos);
+    // EEPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
+      eeprom_write_byte(p, v);
+      // Avoid triggering watchdog during long EEPROM writes
+      if (++written & 0x7F)
+        delay(2);
+      else
+        safe_delay(2);
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        return true;
+      }
+    }
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  }
+
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  do {
+    const uint8_t c = eeprom_read_byte((uint8_t*)REAL_EEPROM_ADDR(pos));
+    if (writing)
+      *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+
+  return false;
+}
+
+#endif // USE_WIRED_EEPROM
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/endstop_interrupts.h

@@ -0,0 +1,61 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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 "../../module/endstops.h"
+
+// One ISR for all EXT-Interrupts
+void endstop_ISR() { endstops.update(); }
+
+void setup_endstop_interrupts() {
+  #define _ATTACH(P) attachInterrupt(P, endstop_ISR, CHANGE)
+  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_CALIBRATION, _ATTACH(CALIBRATION_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/GD32_MFL/fast_pwm.cpp

@@ -0,0 +1,97 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+#include "../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../inc/MarlinConfig.h"
+
+#include <PinOpsMap.hpp>
+#include <PinOps.hpp>
+#include "timers.h"
+
+static uint16_t timer_frequency[TIMER_COUNT];
+
+void MarlinHAL::set_pwm_duty(const pin_t pin, const uint16_t value, const uint16_t scale, const bool invert) {
+  // Calculate duty cycle based on inversion flag
+  const uint16_t duty = invert ? scale - value : value;
+
+  // Check if the pin supports PWM
+  if (PWM_PIN(pin)) {
+    // Get the timer peripheral base associated with the pin
+    const auto timer_base = getPinOpsPeripheralBase<TIMERPinOps, timer::TIMER_Base>(TIMER_PinOps, static_cast<pin_size_t>(pin));
+
+    // Initialize the timer instance
+    auto& TimerInstance = GeneralTimer::get_instance(timer_base);
+
+    // Get channel and previous channel mode
+    const auto channel = getPackedPinChannel(getPackedPinOps(TIMER_PinOps, static_cast<pin_size_t>(pin)));
+    const InputOutputMode previous = TimerInstance.getChannelMode(channel);
+
+    if (timer_frequency[static_cast<size_t>(timer_base)] == 0) {
+      set_pwm_frequency(pin, PWM_FREQUENCY);
+    }
+
+    // Set the PWM duty cycle
+    TimerInstance.setCaptureCompare(channel, duty, CCFormat::B8);
+
+    // Configure pin as PWM output
+    pinOpsPinout(TIMER_PinOps, static_cast<pin_size_t>(pin));
+
+    // Set channel mode if not already set and start timer
+    if (previous != InputOutputMode::PWM0) {
+      TimerInstance.setChannelMode(channel, InputOutputMode::PWM0, static_cast<pin_size_t>(pin));
+      TimerInstance.start();
+    }
+  } else {
+    pinMode(pin, OUTPUT);
+    digitalWrite(pin, duty < scale / 2 ? LOW : HIGH);
+  }
+}
+
+void MarlinHAL::set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {
+  // Check if the pin supports PWM
+  if (!PWM_PIN(pin)) return;
+
+  // Get the timer peripheral base associated with the pin
+  const auto timer_base = getPinOpsPeripheralBase<TIMERPinOps, timer::TIMER_Base>(TIMER_PinOps, static_cast<pin_size_t>(pin));
+
+  // Guard against modifying protected timers
+  #ifdef STEP_TIMER
+    if (timer_base == static_cast<timer::TIMER_Base>(STEP_TIMER)) return;
+  #endif
+  #ifdef TEMP_TIMER
+    if (timer_base == static_cast<timer::TIMER_Base>(TEMP_TIMER)) return;
+  #endif
+  #if defined(PULSE_TIMER) && MF_TIMER_PULSE != MF_TIMER_STEP
+    if (timer_base == static_cast<timer::TIMER_Base>(PULSE_TIMER)) return;
+  #endif
+
+  // Initialize the timer instance
+  auto& TimerInstance = GeneralTimer::get_instance(timer_base);
+
+  TimerInstance.setRolloverValue(f_desired, TimerFormat::HERTZ);
+  timer_frequency[timer_base_to_index(timer_base)] = f_desired;
+}
+
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/fastio.h

@@ -0,0 +1,86 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+// Fast I/O interfaces for GD32
+
+#include <GPIO.hpp>
+#include <variant.h>
+#include <PinOps.hpp>
+#include <PinOpsMap.hpp>
+
+template<typename T>
+FORCE_INLINE static void fast_write_pin_wrapper(pin_size_t IO, T V) {
+  const PortPinPair& pp = port_pin_map[IO];
+  gpio::fast_write_pin(pp.port, pp.pin, static_cast<bool>(V));
+}
+
+FORCE_INLINE static auto fast_read_pin_wrapper(pin_size_t IO) -> bool {
+  const PortPinPair& pp = port_pin_map[IO];
+  return gpio::fast_read_pin(pp.port, pp.pin);
+}
+
+FORCE_INLINE static void fast_toggle_pin_wrapper(pin_size_t IO) {
+  const PortPinPair& pp = port_pin_map[IO];
+  gpio::fast_toggle_pin(pp.port, pp.pin);
+}
+
+// ------------------------
+// Defines
+// ------------------------
+
+#ifndef PWM
+  #define PWM OUTPUT
+#endif
+
+#define _WRITE(IO, V)           fast_write_pin_wrapper(IO, V)
+#define _READ(IO)               fast_read_pin_wrapper(IO)
+#define _TOGGLE(IO)             fast_toggle_pin_wrapper(IO)
+
+#define _GET_MODE(IO)
+#define _SET_MODE(IO, M)        pinMode((IO), (M))
+#define _SET_OUTPUT(IO)         pinMode((IO), OUTPUT)
+#define _SET_OUTPUT_OD(IO)      pinMode((IO), OUTPUT_OPEN_DRAIN)
+
+#define WRITE(IO, V)            _WRITE((IO), (V))
+#define READ(IO)                _READ(IO)
+#define TOGGLE(IO)              _TOGGLE(IO)
+
+#define OUT_WRITE(IO, V)        do { _SET_OUTPUT(IO); WRITE((IO), (V)); } while (0)
+#define OUT_WRITE_OD(IO, V)     do { _SET_OUTPUT_OD(IO); WRITE((IO), (V)); } while (0)
+
+#define SET_INPUT(IO)           _SET_MODE((IO), INPUT)
+#define SET_INPUT_PULLUP(IO)    _SET_MODE((IO), INPUT_PULLUP)
+#define SET_INPUT_PULLDOWN(IO)  _SET_MODE((IO), INPUT_PULLDOWN)
+#define SET_OUTPUT(IO)          OUT_WRITE((IO), LOW)
+#define SET_OUTPUT_OD(IO)       OUT_WRITE_OD((IO), LOW)
+#define SET_PWM(IO)             _SET_MODE((IO), PWM)
+
+#define IS_INPUT(IO)
+#define IS_OUTPUT(IO)
+
+#define PWM_PIN(P)              isPinInPinOps(TIMER_PinOps, P)
+#define NO_COMPILE_TIME_PWM
+
+// Wrappers for digitalRead and digitalWrite
+#define extDigitalRead(IO)      digitalRead(IO)
+#define extDigitalWrite(IO, V)  digitalWrite((IO), (V))

Marlin/src/HAL/GD32_MFL/inc/Conditionals_LCD.h

@@ -0,0 +1,26 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+#if ALL(HAS_MARLINUI_U8GLIB, FORCE_SOFT_SPI)
+  #define U8G_SW_SPI_MFL 1
+#endif

Marlin/src/HAL/GD32_MFL/inc/Conditionals_adv.h

@@ -0,0 +1,26 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+#if ALL(HAS_MEDIA, USBD_USE_CDC_MSC)
+  #define HAS_SD_HOST_DRIVE 1
+#endif

Marlin/src/HAL/GD32_MFL/inc/Conditionals_post.h

@@ -0,0 +1,29 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+// If no real or emulated EEPROM selected, fall back to SD emulation
+#if USE_FALLBACK_EEPROM
+  #define SDCARD_EEPROM_EMULATION
+#elif ANY(I2C_EEPROM, SPI_EEPROM)
+  #define USE_SHARED_EEPROM 1
+#endif

Marlin/src/HAL/GD32_MFL/inc/Conditionals_type.h

@@ -0,0 +1,22 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/GD32_MFL/inc/SanityCheck.h

@@ -0,0 +1,97 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+// Test MFL GD32 specific configuration values for errors at compile-time.
+#if ENABLED(SDCARD_EEPROM_EMULATION) && !HAS_MEDIA
+  #undef SDCARD_EEPROM_EMULATION  // avoid additional error noise
+  #if USE_FALLBACK_EEPROM
+    #warning "EEPROM type not specified. Fallback is SDCARD_EEPROM_EMULATION."
+  #endif
+  #error "SDCARD_EEPROM_EMULATION requires SDSUPPORT. Enable SDSUPPORT or choose another EEPROM emulation."
+#endif
+
+#if ENABLED(FLASH_EEPROM_LEVELING)
+  #error "FLASH_EEPROM_LEVELING is not supported on GD32."
+#endif
+
+#if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
+  #error "SERIAL_STATS_MAX_RX_QUEUED is not supported on GD32."
+#elif ENABLED(SERIAL_STATS_DROPPED_RX)
+  #error "SERIAL_STATS_DROPPED_RX is not supported on GD32."
+#endif
+
+#if TEMP_SENSOR_SOC && defined(ATEMP) && TEMP_SOC_PIN != ATEMP
+  #error "TEMP_SENSOR_SOC requires 'TEMP_SOC_PIN ATEMP' on GD32"
+#endif
+
+// Check for common serial pin conflicts
+#define _CHECK_SERIAL_PIN(N) (( \
+    BTN_EN1 == N || BTN_EN2 == N || DOGLCD_CS == N || HEATER_BED_PIN == N || FAN0_PIN == N || \
+    SDIO_D2_PIN == N || SDIO_D3_PIN == N || SDIO_CK_PIN == N || SDIO_CMD_PIN == N || \
+    Y_STEP_PIN == N || Y_ENABLE_PIN == N || E0_ENABLE_PIN == N || POWER_LOSS_PIN == N \
+  ))
+
+#define CHECK_SERIAL_PIN(T, N) defined(UART##N##_##T##_PIN) && _CHECK_SERIAL_PIN(UART##N##_##T##_PIN)
+
+#if SERIAL_IN_USE(0)
+  #if CHECK_SERIAL_PIN(TX, 0)
+    #error "Serial Port 0 TX IO pins conflict with another pin on the board."
+  #endif
+  #if CHECK_SERIAL_PIN(RX, 0)
+    #error "Serial Port 0 RX IO pins conflict with another pin on the board."
+  #endif
+#endif
+#if SERIAL_IN_USE(1)
+  #if CHECK_SERIAL_PIN(TX, 1)
+    #error "Serial Port 1 TX IO pins conflict with another pin on the board."
+  #endif
+  #if CHECK_SERIAL_PIN(RX, 1)
+    #error "Serial Port 1 RX IO pins conflict with another pin on the board."
+  #endif
+#endif
+#if SERIAL_IN_USE(2)
+  #if CHECK_SERIAL_PIN(TX, 2)
+    #error "Serial Port 2 TX IO pins conflict with another pin on the board."
+  #endif
+  #if CHECK_SERIAL_PIN(RX, 2)
+    #error "Serial Port 2 RX IO pins conflict with another pin on the board."
+  #endif
+#endif
+#if SERIAL_IN_USE(3)
+  #if CHECK_SERIAL_PIN(TX, 3)
+    #error "Serial Port 3 TX IO pins conflict with another pin on the board."
+  #endif
+  #if CHECK_SERIAL_PIN(RX, 3)
+    #error "Serial Port 3 RX IO pins conflict with another pin on the board."
+  #endif
+#endif
+#if SERIAL_IN_USE(4)
+  #if CHECK_SERIAL_PIN(TX, 4)
+    #error "Serial Port 4 TX IO pins conflict with another pin on the board."
+  #endif
+  #if CHECK_SERIAL_PIN(RX, 4)
+    #error "Serial Port 4 RX IO pins conflict with another pin on the board."
+  #endif
+#endif
+#undef CHECK_SERIAL_PIN
+#undef _CHECK_SERIAL_PIN

Marlin/src/HAL/GD32_MFL/pinsDebug.h

@@ -0,0 +1,104 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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
+
+/**
+ * Pins Debugging for GD32
+ *
+ *   - NUMBER_PINS_TOTAL
+ *   - MULTI_NAME_PAD
+ *   - getPinByIndex(index)
+ *   - printPinNameByIndex(index)
+ *   - getPinIsDigitalByIndex(index)
+ *   - digitalPinToAnalogIndex(pin)
+ *   - getValidPinMode(pin)
+ *   - isValidPin(pin)
+ *   - isAnalogPin(pin)
+ *   - digitalRead_mod(pin)
+ *   - pwm_status(pin)
+ *   - printPinPWM(pin)
+ *   - printPinPort(pin)
+ *   - printPinNumber(pin)
+ *   - printPinAnalog(pin)
+ */
+
+#include "../../inc/MarlinConfig.h"
+#include <Arduino.h>
+#include <PinOps.hpp>
+#include <Analog.h>
+
+#ifndef TOTAL_PIN_COUNT
+  #error "Expected TOTAL_PIN_COUNT not found."
+#endif
+
+#define NUM_DIGITAL_PINS  TOTAL_PIN_COUNT
+#define NUMBER_PINS_TOTAL TOTAL_PIN_COUNT
+
+#define getPinByIndex(x) pin_t(pin_array[x].pin)
+#define isValidPin(P) WITHIN(P, 0, (NUM_DIGITAL_PINS - 1))
+#define digitalRead_mod(P) extDigitalRead(P)
+#define printPinNumber(P) do { sprintf_P(buffer, PSTR("%3hd "), pin_t(P)); SERIAL_ECHO(buffer); } while (0)
+#define printPinAnalog(P) do { sprintf_P(buffer, PSTR(" (A%2d)  "), pin_t(getAdcChannelFromPin(P))); SERIAL_ECHO(buffer); } while (0)
+#define printPinNameByIndex(x) do { sprintf_P(buffer, PSTR("%-" STRINGIFY(MAX_NAME_LENGTH) "s"), pin_array[x].name); SERIAL_ECHO(buffer); } while (0)
+
+#define MULTI_NAME_PAD 21 // Space needed to be pretty if not first name assigned to a pin
+
+#ifndef M43_NEVER_TOUCH
+  #define M43_NEVER_TOUCH(x) WITHIN(x, 9, 10) // SERIAL pins: PA9(TX) PA10(RX)
+#endif
+
+bool isAnalogPin(const pin_t pin) {
+  if (!isValidPin(pin)) return false;
+
+  if (getAdcChannel(pin) != adc::ADC_Channel::INVALID) {
+    const PortPinPair& pp = port_pin_map[pin];
+    auto& instance = gpio::GPIO::get_instance(pp.port).value();
+    return instance.get_pin_mode(pp.pin) == gpio::Pin_Mode::ANALOG && !M43_NEVER_TOUCH(pin);
+  }
+
+  return false;
+}
+
+bool getValidPinMode(const pin_t pin) {
+  if (!isValidPin(pin)) return false;
+
+  const PortPinPair& pp = port_pin_map[pin];
+  auto& instance = gpio::GPIO::get_instance(pp.port).value();
+  gpio::Pin_Mode mode = instance.get_pin_mode(pp.pin);
+
+  return mode != gpio::Pin_Mode::ANALOG && mode != gpio::Pin_Mode::INPUT_FLOATING &&
+         mode != gpio::Pin_Mode::INPUT_PULLUP && mode != gpio::Pin_Mode::INPUT_PULLDOWN;
+}
+
+bool getPinIsDigitalByIndex(const int16_t index) {
+  const pin_t pin = getPinByIndex(index);
+  return (!isAnalogPin(pin));
+}
+
+int8_t digitalPinToAnalogIndex(const pin_t pin) {
+  if (!isValidPin(pin) || !isAnalogPin(pin)) return -1;
+  return pin; // Analog and digital pin indexes are shared
+}
+
+bool pwm_status(const pin_t pin) { return false; }
+void printPinPWM(const pin_t pin) { /* TODO */ }
+void printPinPort(const pin_t pin) { /* TODO */ }

Marlin/src/HAL/GD32_MFL/sd/SDCard.h

@@ -0,0 +1,222 @@
+//
+// MFL gd32f30x SDCARD using DMA through SDIO in C++
+//
+// Copyright (C) 2025 B. Mourit <bnmguy@gmail.com>
+//
+// This software is free software: you can redistribute it and/or modify it under the terms of the
+// GNU Lesser General Public License as published by the Free Software Foundation,
+// either version 3 of the License, or (at your option) any later version.
+//
+// This software 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License along with this software.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+#pragma once
+
+#include "../../../inc/MarlinConfig.h"
+
+#include <SDIO.hpp>
+
+namespace sdio {
+
+class DMA;
+
+class CardDMA {
+public:
+  static auto get_instance() -> CardDMA&;
+
+  // Initialization
+  auto init() -> SDIO_Error_Type;
+  auto card_init() -> SDIO_Error_Type;
+
+  // Startup and shutdown procedures
+  auto begin_startup_procedure() -> SDIO_Error_Type;
+  void begin_shutdown_procedure();
+
+  // Configuration
+  auto set_hardware_bus_width(Bus_Width width) -> SDIO_Error_Type;
+  auto send_bus_width_command(uint32_t width_value) -> SDIO_Error_Type;
+
+  // Main read/write/erase functions
+  auto read(uint8_t* buf, uint32_t address, uint32_t count) -> SDIO_Error_Type;
+  auto write(uint8_t* buf, uint32_t address, uint32_t count) -> SDIO_Error_Type;
+  auto erase(uint32_t address_start, uint32_t address_end) -> SDIO_Error_Type;
+
+  // Card select
+  auto select_deselect() -> SDIO_Error_Type;
+
+  // Status and state
+  auto get_card_interface_status(uint32_t* status) -> SDIO_Error_Type;
+  auto get_sdcard_status(uint32_t* status) -> SDIO_Error_Type;
+  auto get_transfer_state() -> Transfer_State;
+  auto get_card_state(Card_State* card_state) -> SDIO_Error_Type;
+  auto check_sdio_status(Command_Index index = Command_Index::INVALID, bool check_index = false, bool ignore_crc = false) -> SDIO_Error_Type;
+
+  // DMA
+  void set_dma_parameters(uint8_t* buf, uint32_t count, bool is_write);
+  void check_dma_complete();
+
+  // Stop transfer
+  auto stop_transfer() -> SDIO_Error_Type;
+
+  // Card information
+  auto get_card_specific_data(Card_Info* info) -> SDIO_Error_Type;
+  constexpr auto get_data_block_size_index(uint16_t size) -> Block_Size;
+  [[nodiscard]] auto get_card_capacity() const -> uint32_t;
+
+  // SDIO configuration
+  void sdio_configure(const SDIO_Config config) { sdio_.init(config); }
+
+  // Interrupt handler
+  void handle_interrupts();
+
+  // Variable stored parameters
+  auto get_scr(uint16_t rca, uint32_t* scr) -> SDIO_Error_Type;
+  auto store_cid() -> SDIO_Error_Type;
+  auto store_csd() -> SDIO_Error_Type;
+
+  // Inlined accessor methods
+  auto get_config() -> SDIO_Config& { return config_; }
+  auto get_dma_instance() -> dma::DMA& { return dma_; }
+  void set_data_end_interrupt() { sdio_.set_interrupt_enable(Interrupt_Type::DTENDIE, true); }
+  void set_sdio_dma_enable(bool enable) { sdio_.set_dma_enable(enable); }
+  auto get_is_sdio_rx() -> bool { return is_rx_; }
+  void clear_sdio_data_flags() { sdio_.clear_multiple_interrupt_flags(clear_data_flags); }
+  void clear_sdio_cmd_flags() { sdio_.clear_multiple_interrupt_flags(clear_command_flags); }
+  void clear_sdio_common_flags() { sdio_.clear_multiple_interrupt_flags(clear_common_flags); }
+  auto get_state() -> Operational_State { return current_state_; }
+  void set_state(Operational_State state) { current_state_ = state; }
+  void set_transfer_error(SDIO_Error_Type error) { transfer_error_ = error; }
+  void set_transfer_end(bool end) { transfer_end_ = end; };
+
+  auto set_desired_clock(uint32_t desired_clock, bool wide_bus, bool low_power) -> SDIO_Error_Type {
+    sdio_.init(SDIO_Config{
+      .desired_clock = desired_clock,
+      .enable_bypass = false,
+      .enable_powersave = low_power,
+      .enable_hwclock = false,
+      .clock_edge = Clock_Edge::RISING_EDGE,
+      .width = wide_bus ? Bus_Width::WIDTH_4BIT : Bus_Width::WIDTH_1BIT
+    });
+
+    sync_domains();
+    desired_clock_ = desired_clock;
+
+    return SDIO_Error_Type::OK;
+  }
+
+private:
+  CardDMA();
+
+  // Prevent copying or assigning
+  CardDMA(const CardDMA&) = delete;
+  auto operator=(const CardDMA&) -> CardDMA& = delete;
+
+  // Helper function
+  auto wait_for_card_ready() -> SDIO_Error_Type;
+
+  // Member variables
+  alignas(4) uint32_t sdcard_csd_[4];
+  alignas(4) uint32_t sdcard_cid_[4];
+  alignas(4) uint32_t sdcard_scr_[2];
+  uint32_t desired_clock_;
+  uint32_t total_bytes_;
+  SDIO& sdio_;
+  SDIO_Config& config_;
+  const dma::DMA_Base dmaBase_;
+  const dma::DMA_Channel dmaChannel_;
+  dma::DMA& dma_;
+  uint16_t sdcard_rca_;
+  SDIO_Error_Type transfer_error_;
+  Interface_Version interface_version_;
+  Card_Type card_type_;
+  Operational_State current_state_;
+  bool transfer_end_;
+  bool multiblock_;
+  bool is_rx_;
+
+  // Private helper methods
+  auto validate_voltage() -> SDIO_Error_Type;
+  auto get_command_sent_result() -> SDIO_Error_Type;
+  auto get_r1_result(Command_Index index) -> SDIO_Error_Type;
+  auto get_r6_result(Command_Index index, uint16_t* rca) -> SDIO_Error_Type;
+  auto get_r7_result() -> SDIO_Error_Type { return check_sdio_status(Command_Index::INVALID, false, false); };
+  void sync_domains() { delayMicroseconds(8); }
+
+  auto validate_transfer_params(uint32_t* buf, uint16_t size) -> bool {
+    if (buf == nullptr) return false;
+    // Size must be > 0, <= 2048 and power of 2
+    return size > 0U && size <= 2048U && !(size & (size - 1U));
+  }
+
+  void process_sdsc_specific_csd(Card_Info* info, const uint8_t* csd_bytes) {
+    const uint32_t device_size = ((csd_bytes[6] & 0x3U) << 10) |
+                                 (csd_bytes[7] << 2) |
+                                 ((csd_bytes[8] >> 6) & 0x3U);
+
+    const uint8_t device_size_multiplier = ((csd_bytes[9] & 0x3U) << 1) |
+                                           ((csd_bytes[10] >> 7) & 0x1U);
+
+    // Store calculated values
+    info->csd.device_size = device_size;
+    info->csd.device_size_multiplier = device_size_multiplier;
+
+    // Calculate block size and capacity
+    info->block_size = 1U << info->csd.read_block_length;
+    info->capacity = (device_size + 1U) *
+                     (1U << (device_size_multiplier + 2U)) *
+                     info->block_size;
+  }
+
+  void process_sdhc_specific_csd(Card_Info* info, const uint8_t* csd_bytes) {
+    info->csd.device_size = static_cast<uint32_t>((csd_bytes[7] & 0x3FU) << 16) |
+                            static_cast<uint32_t>((csd_bytes[8]) << 8) |
+                            static_cast<uint32_t>(csd_bytes[9]);
+
+    // Set block size and calculate capacity
+    info->block_size = BLOCK_SIZE;
+    info->capacity = static_cast<uint32_t>((info->csd.device_size + 1U) *
+                     BLOCK_SIZE * KILOBYTE);
+  }
+
+  void process_common_csd_tail(Card_Info* info, const uint8_t* csd_bytes) {
+    // Calculate sector_size
+    info->csd.sector_size = static_cast<uint8_t>(((csd_bytes[9] & 0x3FU) << 1) |
+                                                  (csd_bytes[10] & 0x80U) >> 7);
+
+    // Calculate speed_factor and write_block_length
+    info->csd.speed_factor = static_cast<uint8_t>((csd_bytes[11] & 0x1CU) >> 2);
+    info->csd.write_block_length = static_cast<uint8_t>(((csd_bytes[11] & 0x3U) << 2) |
+                                                        ((csd_bytes[12] & 0xC0U) >> 6));
+
+    // Calculate checksum
+    info->csd.checksum = static_cast<uint8_t>((csd_bytes[15] & 0xFEU) >> 1);
+  }
+
+  void disable_all_interrupts() {
+    sdio_.set_interrupt_enable(Interrupt_Type::DTCRCERRIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::DTTMOUTIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::DTENDIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::STBITEIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::TFHIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::RFHIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::TXUREIE, false);
+    sdio_.set_interrupt_enable(Interrupt_Type::RXOREIE, false);
+  }
+
+  template <typename CheckFunc>
+  auto send_command_and_check(Command_Index command, uint32_t argument,
+     Command_Response response, Wait_Type type, CheckFunc check_result) -> SDIO_Error_Type {
+    sdio_.set_command_state_machine(command, argument, response, type);
+    sync_domains();
+    sdio_.set_command_state_machine_enable(true);
+    return check_result();
+  }
+};
+
+} // namespace sdio
+
+extern sdio::CardDMA& CardDMA_I;

Marlin/src/HAL/GD32_MFL/sd/sdio.cpp

@@ -0,0 +1,231 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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/>.
+ *
+ */
+
+#include "../../platforms.h"
+
+#ifdef ARDUINO_ARCH_MFL
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ENABLED(ONBOARD_SDIO)
+
+#include <PinOpsMap.hpp>
+#include <PinOps.hpp>
+#include "SDCard.h"
+#include "sdio.h"
+
+using namespace sdio;
+
+#define TARGET_CLOCK  6000000U
+#define BLOCK_SIZE    512U
+#define CARD_TIMEOUT  500 // ms
+#define READ_RETRIES  3U
+
+inline constexpr uint32_t TARGET_SDIO_CLOCK = TARGET_CLOCK;
+inline constexpr uint32_t SDIO_BLOCK_SIZE = BLOCK_SIZE;
+inline constexpr uint32_t SD_TIMEOUT = CARD_TIMEOUT;
+inline constexpr uint8_t SDIO_READ_RETRIES = READ_RETRIES;
+
+Card_State cardState = Card_State::READY;
+
+auto SDIO_SetBusWidth(Bus_Width width) -> bool {
+  return (CardDMA_I.set_hardware_bus_width(width) == SDIO_Error_Type::OK);
+}
+
+void mfl_sdio_init() {
+  pinOpsPinout(SD_CMD_PinOps, static_cast<pin_size_t>(SDIO_CMD_PIN));
+  pinOpsPinout(SD_CK_PinOps, static_cast<pin_size_t>(SDIO_CK_PIN));
+  pinOpsPinout(SD_DATA0_PinOps, static_cast<pin_size_t>(SDIO_D0_PIN));
+  pinOpsPinout(SD_DATA1_PinOps, static_cast<pin_size_t>(SDIO_D1_PIN));
+  pinOpsPinout(SD_DATA2_PinOps, static_cast<pin_size_t>(SDIO_D2_PIN));
+  pinOpsPinout(SD_DATA3_PinOps, static_cast<pin_size_t>(SDIO_D3_PIN));
+
+  NVIC_EnableIRQ(DMA1_Channel3_4_IRQn);
+  NVIC_EnableIRQ(SDIO_IRQn);
+}
+
+bool SDIO_Init() {
+  SDIO_Error_Type result = SDIO_Error_Type::OK;
+  uint8_t retryCount = SDIO_READ_RETRIES;
+
+  mfl_sdio_init();
+
+  uint8_t retries = retryCount;
+  for (;;) {
+    hal.watchdog_refresh();
+    result = CardDMA_I.init();
+    if (result == SDIO_Error_Type::OK) break;
+    if (!--retries) return false;
+  }
+
+  CardDMA_I.set_desired_clock(TARGET_SDIO_CLOCK, false, false);
+
+  retries = retryCount;
+  for (;;) {
+    hal.watchdog_refresh();
+    if (SDIO_SetBusWidth(Bus_Width::WIDTH_4BIT)) break;
+    if (!--retries) break;
+  }
+
+  CardDMA_I.set_desired_clock(TARGET_SDIO_CLOCK, true, true);
+
+  // Fallback
+  if (!retries) {
+    mfl_sdio_init();
+    retries = retryCount;
+    for (;;) {
+      hal.watchdog_refresh();
+      result = CardDMA_I.init();
+      if (result == SDIO_Error_Type::OK) break;
+      if (!--retries) return false;
+    }
+    CardDMA_I.set_desired_clock(TARGET_SDIO_CLOCK, false, true);
+  }
+
+  return true;
+}
+
+static bool SDIO_ReadWriteBlock_DMA(uint32_t block, const uint8_t* src, uint8_t* dst) {
+  hal.watchdog_refresh();
+  SDIO_Error_Type result = SDIO_Error_Type::OK;
+
+  // Write
+  if (src) {
+    result = CardDMA_I.write(reinterpret_cast<uint8_t*>(const_cast<uint8_t*>(src)), block, 1);
+  }
+  // Read
+  else {
+    result = CardDMA_I.read(dst, block, 1);
+  }
+
+  if (result != SDIO_Error_Type::OK) {
+    return false;
+  }
+
+  millis_t timeout = millis() + SD_TIMEOUT;
+  while (CardDMA_I.get_state() != sdio::Operational_State::READY) {
+    if (ELAPSED(millis(), timeout)) {
+      return false;
+    }
+  }
+
+  CardDMA_I.check_dma_complete();
+
+  timeout = millis() + SD_TIMEOUT;
+  do {
+    result = CardDMA_I.get_card_state(&cardState);
+    if (ELAPSED(millis(), timeout)) {
+      return false;
+    }
+  } while (result == SDIO_Error_Type::OK && cardState != sdio::Card_State::TRANSFER);
+
+  return true;
+}
+
+bool SDIO_ReadBlock(uint32_t block, uint8_t* dst) {
+  // Check if the address is aligned to 4 bytes
+  if (reinterpret_cast<uint32_t>(dst) & 0x03) {
+    return false;
+  }
+
+  uint8_t retries = SDIO_READ_RETRIES;
+  while (retries--) {
+    if (SDIO_ReadWriteBlock_DMA(block, nullptr, dst)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool SDIO_WriteBlock(uint32_t block, const uint8_t* src) {
+  // Check if the address is aligned to 4 bytes
+  if (reinterpret_cast<uint32_t>(src) & 0x03) {
+    return false;
+  }
+
+  uint8_t retries = SDIO_READ_RETRIES;
+  while (retries--) {
+    if (SDIO_ReadWriteBlock_DMA(block, src, nullptr)) {
+      return true;
+      delay(10);
+    }
+  }
+
+  return false;
+}
+
+bool SDIO_IsReady() {
+  return (CardDMA_I.get_state() == sdio::Operational_State::READY);
+}
+
+uint32_t SDIO_GetCardSize() {
+  return CardDMA_I.get_card_capacity();
+}
+
+// DMA interrupt handler
+void DMA1_IRQHandler() {
+  auto& dma_instance = CardDMA_I.get_dma_instance();
+  bool is_receive = CardDMA_I.get_is_sdio_rx();
+
+  // Check for Transfer Complete Interrupt
+  if (dma_instance.get_interrupt_flag(dma::Interrupt_Flags::INTR_FLAG_FTFIF)) {
+    dma_instance.set_interrupt_enable(dma::Interrupt_Type::INTR_FTFIE, false);
+    dma_instance.set_interrupt_enable(dma::Interrupt_Type::INTR_ERRIE, false);
+    dma_instance.clear_interrupt_flag(dma::Interrupt_Flags::INTR_FLAG_FTFIF);
+    if (is_receive) {
+      CardDMA_I.set_sdio_dma_enable(false);
+      CardDMA_I.clear_sdio_data_flags();
+      CardDMA_I.set_state(sdio::Operational_State::READY);
+    } else {
+      CardDMA_I.set_data_end_interrupt();
+    }
+    // Signal that transfer is complete
+    CardDMA_I.set_transfer_end(true);
+  }
+
+  else if (dma_instance.get_interrupt_flag(dma::Interrupt_Flags::INTR_FLAG_ERRIF)) {
+    dma_instance.set_interrupt_enable(dma::Interrupt_Type::INTR_HTFIE, false);
+    dma_instance.set_interrupt_enable(dma::Interrupt_Type::INTR_ERRIE, false);
+    dma_instance.set_interrupt_enable(dma::Interrupt_Type::INTR_FTFIE, false);
+    // Clear all flags
+    dma_instance.clear_interrupt_flag(dma::Interrupt_Flags::INTR_FLAG_GIF);
+    // Signal that an error occurred
+    CardDMA_I.set_transfer_error(SDIO_Error_Type::ERROR);
+    CardDMA_I.set_state(sdio::Operational_State::READY);
+  }
+}
+
+extern "C" {
+
+  void SDIO_IRQHandler(void) {
+    CardDMA_I.handle_interrupts();
+  }
+
+  void DMA1_Channel3_4_IRQHandler(void) {
+    DMA1_IRQHandler();
+  }
+
+} // extern "C"
+
+#endif // ONBOARD_SDIO
+#endif // ARDUINO_ARCH_MFL

Marlin/src/HAL/GD32_MFL/sd/sdio.h

@@ -0,0 +1,36 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 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 <SDIO.hpp>
+#include <DMA.hpp>
+
+#define SDIO_D0_PIN   PC8
+#define SDIO_D1_PIN   PC9
+#define SDIO_D2_PIN   PC10
+#define SDIO_D3_PIN   PC11
+#define SDIO_CK_PIN   PC12
+#define SDIO_CMD_PIN  PD2
+
+void sdio_mfl_init();
+auto SDIO_SetBusWidth(sdio::Bus_Width width) -> bool;
+void DMA1_IRQHandler(dma::DMA_Channel channel);