Update Configuration.h

Update Configuration_adv.h
Merge branch 'bugfix-2.0.x' into TronxyX5SA
2021-07-31 16:22:01 -04:00 · 2021-07-31 16:21:50 -04:00 · 2021-07-31 14:27:16 -04:00 · 2021-07-31 05:32:13 -05:00 · 2021-07-31 00:47:30 -05:00 · 2021-07-30 23:49:12 -05:00
837 changed files with 25213 additions and 14051 deletions
@@ -56,29 +56,31 @@ jobs:

        # STM32F1 (Maple) Environments

-        - STM32F103RC_btt
-        - STM32F103RC_btt_USB
-        - STM32F103RE_btt
-        - STM32F103RE_btt_USB
+        #- STM32F103RC_btt_maple
+        - STM32F103RC_btt_USB_maple
        - STM32F103RC_fysetc
        - STM32F103RC_meeb
        - jgaurora_a5s_a1
        - STM32F103VE_longer
-        - mks_robin
+        #- mks_robin_maple
        - mks_robin_lite
        - mks_robin_pro
-        - STM32F103RET6_creality
-        - mks_robin_nano35
+        #- mks_robin_nano35_maple
+        #- STM32F103RET6_creality_maple

        # STM32 (ST) Environments

-        - STM32F103RC_btt_stm32
+        - STM32F103RC_btt
+        #- STM32F103RC_btt_USB
+        - STM32F103RE_btt
+        - STM32F103RE_btt_USB
+        - STM32F103RET6_creality
        - STM32F407VE_black
        - STM32F401VE_STEVAL
        - BIGTREE_BTT002
        - BIGTREE_SKR_PRO
        - BIGTREE_GTR_V1_0
-        - mks_robin_stm32
+        - mks_robin
        - ARMED
        - FYSETC_S6
        - STM32F070CB_malyan
@@ -88,7 +90,7 @@ jobs:
        - rumba32
        - LERDGEX
        - LERDGEK
-        - mks_robin_nano35_stm32
+        - mks_robin_nano35
        - NUCLEO_F767ZI
        - REMRAM_V1
        - BTT_SKR_SE_BX
@@ -107,8 +109,25 @@ jobs:

    steps:

+    - name: Check out the PR
+      uses: actions/checkout@v2
+
+    - name: Cache pip
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+
+    - name: Cache PlatformIO
+      uses: actions/cache@v2
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+
    - name: Select Python 3.7
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
      with:
        python-version: '3.7' # Version range or exact version of a Python version to use, using semvers version range syntax.
        architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
@@ -118,9 +137,6 @@ jobs:
        pip install -U https://github.com/platformio/platformio-core/archive/develop.zip
        platformio update

-    - name: Check out the PR
-      uses: actions/checkout@v2
-
    - name: Run ${{ matrix.test-platform }} Tests
      run: |
        make tests-single-ci TEST_TARGET=${{ matrix.test-platform }}
@@ -143,7 +143,11 @@ vc-fileutils.settings
 .vscode/launch.json
 .vscode/*.db

-# cmake
+#Simulation
+imgui.ini
+eeprom.dat
+
+#cmake
 CMakeLists.txt
 src/CMakeLists.txt
 CMakeListsPrivate.txt
@@ -30,7 +30,7 @@
 *
 * Basic settings can be found in Configuration.h
 */
-#define CONFIGURATION_ADV_H_VERSION 02000801
+#define CONFIGURATION_ADV_H_VERSION 02000901

 //===========================================================================
 //============================= Thermal Settings ============================
@@ -125,10 +125,33 @@
  #define PROBE_BETA                   3950    // Beta value
 #endif

-//
-// Hephestos 2 24V heated bed upgrade kit.
-// https://store.bq.com/en/heated-bed-kit-hephestos2
-//
+#if TEMP_SENSOR_BOARD == 1000
+  #define BOARD_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
+  #define BOARD_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
+  #define BOARD_BETA                   3950    // Beta value
+#endif
+
+#if TEMP_SENSOR_REDUNDANT == 1000
+  #define REDUNDANT_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
+  #define REDUNDANT_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
+  #define REDUNDANT_BETA                   3950    // Beta value
+#endif
+
+/**
+ * Configuration options for MAX Thermocouples (-2, -3, -5).
+ *   FORCE_HW_SPI:   Ignore SCK/MOSI/MISO pins and just use the CS pin & default SPI bus.
+ *   MAX31865_WIRES: Set the number of wires for the probe connected to a MAX31865 board, 2-4. Default: 2
+ *   MAX31865_50HZ:  Enable 50Hz filter instead of the default 60Hz.
+ */
+//#define TEMP_SENSOR_FORCE_HW_SPI
+//#define MAX31865_SENSOR_WIRES_0 2
+//#define MAX31865_SENSOR_WIRES_1 2
+//#define MAX31865_50HZ_FILTER
+
+/**
+ * Hephestos 2 24V heated bed upgrade kit.
+ * https://store.bq.com/en/heated-bed-kit-hephestos2
+ */
 //#define HEPHESTOS2_HEATED_BED_KIT
 #if ENABLED(HEPHESTOS2_HEATED_BED_KIT)
  #undef TEMP_SENSOR_BED
@@ -196,7 +219,7 @@
  #define COOLER_MAXTEMP          26  // (°C)
  #define COOLER_DEFAULT_TEMP     16  // (°C)
  #define TEMP_COOLER_HYSTERESIS   1  // (°C) Temperature proximity considered "close enough" to the target
-  #define COOLER_PIN               8  // Laser cooler on/off pin used to control power to the cooling element e.g. TEC, External chiller via relay
+  #define COOLER_PIN               8  // Laser cooler on/off pin used to control power to the cooling element (e.g., TEC, External chiller via relay)
  #define COOLER_INVERTING     false
  #define TEMP_COOLER_PIN         15  // Laser/Cooler temperature sensor pin. ADC is required.
  #define COOLER_FAN                  // Enable a fan on the cooler, Fan# 0,1,2,3 etc.
@@ -207,6 +230,18 @@
  #endif
 #endif

+//
+// Motherboard Sensor options
+//
+#if TEMP_SENSOR_BOARD
+  #define THERMAL_PROTECTION_BOARD   // Halt the printer if the board sensor leaves the temp range below.
+  #define BOARD_MINTEMP           8  // (°C)
+  #define BOARD_MAXTEMP          70  // (°C)
+  #ifndef TEMP_BOARD_PIN
+    //#define TEMP_BOARD_PIN -1      // Board temp sensor pin, if not set in pins file.
+  #endif
+#endif
+
 //
 // Laser Coolant Flow Meter
 //
@@ -239,11 +274,11 @@
 */
 #if ENABLED(THERMAL_PROTECTION_HOTENDS)
  #define THERMAL_PROTECTION_PERIOD 40        // Seconds
-  #define THERMAL_PROTECTION_HYSTERESIS 4     // Degrees Celsius
+  #define THERMAL_PROTECTION_HYSTERESIS 15    // Degrees Celsius

-  //#define ADAPTIVE_FAN_SLOWING              // Slow part cooling fan if temperature drops
+  #define ADAPTIVE_FAN_SLOWING              // Slow part cooling fan if temperature drops
  #if BOTH(ADAPTIVE_FAN_SLOWING, PIDTEMP)
-    //#define NO_FAN_SLOWING_IN_PID_TUNING    // Don't slow fan speed during M303
+    #define NO_FAN_SLOWING_IN_PID_TUNING    // Don't slow fan speed during M303
  #endif

  /**
@@ -258,7 +293,7 @@
   * and/or decrease WATCH_TEMP_INCREASE. WATCH_TEMP_INCREASE should not be set
   * below 2.
   */
-  #define WATCH_TEMP_PERIOD  20               // Seconds
+  #define WATCH_TEMP_PERIOD  40               // Seconds
  #define WATCH_TEMP_INCREASE 2               // Degrees Celsius
 #endif

@@ -266,13 +301,13 @@
 * Thermal Protection parameters for the bed are just as above for hotends.
 */
 #if ENABLED(THERMAL_PROTECTION_BED)
-  #define THERMAL_PROTECTION_BED_PERIOD        20 // Seconds
+  #define THERMAL_PROTECTION_BED_PERIOD        60 // Seconds
  #define THERMAL_PROTECTION_BED_HYSTERESIS     2 // Degrees Celsius

  /**
   * As described above, except for the bed (M140/M190/M303).
   */
-  #define WATCH_BED_TEMP_PERIOD                60 // Seconds
+  #define WATCH_BED_TEMP_PERIOD                90 // Seconds
  #define WATCH_BED_TEMP_INCREASE               2 // Degrees Celsius
 #endif

@@ -437,9 +472,9 @@
 * Hotend Idle Timeout
 * Prevent filament in the nozzle from charring and causing a critical jam.
 */
-//#define HOTEND_IDLE_TIMEOUT
+#define HOTEND_IDLE_TIMEOUT
 #if ENABLED(HOTEND_IDLE_TIMEOUT)
-  #define HOTEND_IDLE_TIMEOUT_SEC (5*60)    // (seconds) Time without extruder movement to trigger protection
+  #define HOTEND_IDLE_TIMEOUT_SEC (15*60)    // (seconds) Time without extruder movement to trigger protection
  #define HOTEND_IDLE_MIN_TRIGGER   180     // (°C) Minimum temperature to enable hotend protection
  #define HOTEND_IDLE_NOZZLE_TARGET   0     // (°C) Safe temperature for the nozzle after timeout
  #define HOTEND_IDLE_BED_TARGET      0     // (°C) Safe temperature for the bed after timeout
@@ -461,18 +496,22 @@
 * The fan turns on automatically whenever any driver is enabled and turns
 * off (or reduces to idle speed) shortly after drivers are turned off.
 */
-//#define USE_CONTROLLER_FAN
+#define USE_CONTROLLER_FAN
 #if ENABLED(USE_CONTROLLER_FAN)
-  //#define CONTROLLER_FAN_PIN -1        // Set a custom pin for the controller fan
-  //#define CONTROLLER_FAN_USE_Z_ONLY    // With this option only the Z axis is considered
-  //#define CONTROLLER_FAN_IGNORE_Z      // Ignore Z stepper. Useful when stepper timeout is disabled.
-  #define CONTROLLERFAN_SPEED_MIN      0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
-  #define CONTROLLERFAN_SPEED_ACTIVE 255 // (0-255) Active speed, used when any motor is enabled
-  #define CONTROLLERFAN_SPEED_IDLE     0 // (0-255) Idle speed, used when motors are disabled
-  #define CONTROLLERFAN_IDLE_TIME     60 // (seconds) Extra time to keep the fan running after disabling motors
-  //#define CONTROLLER_FAN_EDITABLE      // Enable M710 configurable settings
+  //#define CONTROLLER_FAN_PIN -1           // Set a custom pin for the controller fan
+  //#define CONTROLLER_FAN_USE_Z_ONLY       // With this option only the Z axis is considered
+  //#define CONTROLLER_FAN_IGNORE_Z         // Ignore Z stepper. Useful when stepper timeout is disabled.
+  #define CONTROLLERFAN_SPEED_MIN         0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
+  #define CONTROLLERFAN_SPEED_ACTIVE    255 // (0-255) Active speed, used when any motor is enabled
+  #define CONTROLLERFAN_SPEED_IDLE        0 // (0-255) Idle speed, used when motors are disabled
+  #define CONTROLLERFAN_IDLE_TIME        60 // (seconds) Extra time to keep the fan running after disabling motors
+
+  // Use TEMP_SENSOR_BOARD as a trigger for enabling the controller fan
+  //#define CONTROLLER_FAN_MIN_BOARD_TEMP 40  // (°C) Turn on the fan if the board reaches this temperature
+
+  //#define CONTROLLER_FAN_EDITABLE         // Enable M710 configurable settings
  #if ENABLED(CONTROLLER_FAN_EDITABLE)
-    #define CONTROLLER_FAN_MENU          // Enable the Controller Fan submenu
+    #define CONTROLLER_FAN_MENU             // Enable the Controller Fan submenu
  #endif
 #endif

@@ -526,6 +565,11 @@
  //#define USE_OCR2A_AS_TOP
 #endif

+/**
+ * Use one of the PWM fans as a redundant part-cooling fan
+ */
+//#define REDUNDANT_PART_COOLING_FAN 2  // Index of the fan to sync with FAN 0.
+
 // @section extruder

 /**
@@ -540,7 +584,7 @@
 * Multiple extruders can be assigned to the same pin in which case
 * the fan will turn on when any selected extruder is above the threshold.
 */
-#define E0_AUTO_FAN_PIN -1
+#define E0_AUTO_FAN_PIN FAN2_PIN
 #define E1_AUTO_FAN_PIN -1
 #define E2_AUTO_FAN_PIN -1
 #define E3_AUTO_FAN_PIN -1
@@ -671,6 +715,12 @@
  #endif
 #endif

+// Drive the E axis with two synchronized steppers
+//#define E_DUAL_STEPPER_DRIVERS
+#if ENABLED(E_DUAL_STEPPER_DRIVERS)
+  //#define INVERT_E1_VS_E0_DIR   // Enable if the E motors need opposite DIR states
+#endif
+
 /**
 * Dual X Carriage
 *
@@ -734,7 +784,7 @@
 * the position of the toolhead relative to the workspace.
 */

-//#define SENSORLESS_BACKOFF_MM  { 2, 2 }     // (mm) Backoff from endstops before sensorless homing
+//#define SENSORLESS_BACKOFF_MM  { 2, 2, 0 }  // (mm) Backoff from endstops before sensorless homing

 #define HOMING_BUMP_MM      { 5, 5, 2 }       // (mm) Backoff from endstops after first bump
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }       // Re-Bump Speed Divisor (Divides the Homing Feedrate)
@@ -918,6 +968,9 @@
 #define INVERT_X_STEP_PIN false
 #define INVERT_Y_STEP_PIN false
 #define INVERT_Z_STEP_PIN false
+#define INVERT_I_STEP_PIN false
+#define INVERT_J_STEP_PIN false
+#define INVERT_K_STEP_PIN false
 #define INVERT_E_STEP_PIN false

 /**
@@ -929,6 +982,9 @@
 #define DISABLE_INACTIVE_X true
 #define DISABLE_INACTIVE_Y true
 #define DISABLE_INACTIVE_Z true  // Set 'false' if the nozzle could fall onto your printed part!
+#define DISABLE_INACTIVE_I true
+#define DISABLE_INACTIVE_J true
+#define DISABLE_INACTIVE_K true
 #define DISABLE_INACTIVE_E true

 // Default Minimum Feedrates for printing and travel moves
@@ -969,7 +1025,7 @@
 #if ENABLED(BACKLASH_COMPENSATION)
  // Define values for backlash distance and correction.
  // If BACKLASH_GCODE is enabled these values are the defaults.
-  #define BACKLASH_DISTANCE_MM { 0, 0, 0 } // (mm)
+  #define BACKLASH_DISTANCE_MM { 0, 0, 0 } // (mm) One value for each linear axis
  #define BACKLASH_CORRECTION    0.0       // 0.0 = no correction; 1.0 = full correction

  // Add steps for motor direction changes on CORE kinematics
@@ -1040,6 +1096,13 @@
  #define CALIBRATION_MEASURE_LEFT
  #define CALIBRATION_MEASURE_BACK

+  //#define CALIBRATION_MEASURE_IMIN
+  //#define CALIBRATION_MEASURE_IMAX
+  //#define CALIBRATION_MEASURE_JMIN
+  //#define CALIBRATION_MEASURE_JMAX
+  //#define CALIBRATION_MEASURE_KMIN
+  //#define CALIBRATION_MEASURE_KMAX
+
  // Probing at the exact top center only works if the center is flat. If
  // probing on a screwhead or hollow washer, probe near the edges.
  //#define CALIBRATION_MEASURE_AT_TOP_EDGES
@@ -1229,23 +1292,26 @@
  #endif

  // Scroll a longer status message into view
-  //#define STATUS_MESSAGE_SCROLLING
+  #define STATUS_MESSAGE_SCROLLING

  // On the Info Screen, display XY with one decimal place when possible
  //#define LCD_DECIMAL_SMALL_XY

  // Add an 'M73' G-code to set the current percentage
-  //#define LCD_SET_PROGRESS_MANUALLY
+  #define LCD_SET_PROGRESS_MANUALLY

  // Show the E position (filament used) during printing
  //#define LCD_SHOW_E_TOTAL
 #endif

-#if EITHER(SDSUPPORT, LCD_SET_PROGRESS_MANUALLY) && ANY(HAS_MARLINUI_U8GLIB, HAS_MARLINUI_HD44780, IS_TFTGLCD_PANEL, EXTENSIBLE_UI)
-  //#define SHOW_REMAINING_TIME       // Display estimated time to completion
-  #if ENABLED(SHOW_REMAINING_TIME)
-    //#define USE_M73_REMAINING_TIME  // Use remaining time from M73 command instead of estimation
-    //#define ROTATE_PROGRESS_DISPLAY // Display (P)rogress, (E)lapsed, and (R)emaining time
+// LCD Print Progress options
+#if EITHER(SDSUPPORT, LCD_SET_PROGRESS_MANUALLY)
+  #if ANY(HAS_MARLINUI_U8GLIB, EXTENSIBLE_UI, HAS_MARLINUI_HD44780, IS_TFTGLCD_PANEL)
+    //#define SHOW_REMAINING_TIME         // Display estimated time to completion
+    #if ENABLED(SHOW_REMAINING_TIME)
+      //#define USE_M73_REMAINING_TIME    // Use remaining time from M73 command instead of estimation
+      //#define ROTATE_PROGRESS_DISPLAY   // Display (P)rogress, (E)lapsed, and (R)emaining time
+    #endif
  #endif

  #if EITHER(HAS_MARLINUI_U8GLIB, EXTENSIBLE_UI)
@@ -1383,10 +1449,10 @@
  //#define UTF_FILENAME_SUPPORT

  // This allows hosts to request long names for files and folders with M33
-  //#define LONG_FILENAME_HOST_SUPPORT
+  #define LONG_FILENAME_HOST_SUPPORT

  // Enable this option to scroll long filenames in the SD card menu
-  //#define SCROLL_LONG_FILENAMES
+  #define SCROLL_LONG_FILENAMES

  // Leave the heaters on after Stop Print (not recommended!)
  //#define SD_ABORT_NO_COOLDOWN
@@ -1564,7 +1630,7 @@
   */
  //#define STATUS_COMBINE_HEATERS    // Use combined heater images instead of separate ones
  //#define STATUS_HOTEND_NUMBERLESS  // Use plain hotend icons instead of numbered ones (with 2+ hotends)
-  #define STATUS_HOTEND_INVERTED      // Show solid nozzle bitmaps when heating (Requires STATUS_HOTEND_ANIM)
+  #define STATUS_HOTEND_INVERTED      // Show solid nozzle bitmaps when heating (Requires STATUS_HOTEND_ANIM for numbered hotends)
  #define STATUS_HOTEND_ANIM          // Use a second bitmap to indicate hotend heating
  #define STATUS_BED_ANIM             // Use a second bitmap to indicate bed heating
  #define STATUS_CHAMBER_ANIM         // Use a second bitmap to indicate chamber heating
@@ -1575,7 +1641,7 @@
  //#define STATUS_ALT_FAN_BITMAP     // Use the alternative fan bitmap
  //#define STATUS_FAN_FRAMES 3       // :[0,1,2,3,4] Number of fan animation frames
  //#define STATUS_HEAT_PERCENT       // Show heating in a progress bar
-  //#define BOOT_MARLIN_LOGO_ANIMATED // Animated Marlin logo. Costs ~‭3260 (or ~940) bytes of PROGMEM.
+  #define BOOT_MARLIN_LOGO_ANIMATED // Animated Marlin logo. Costs ~‭3260 (or ~940) bytes of PROGMEM.

  // Frivolous Game Options
  //#define MARLIN_BRICKOUT
@@ -1792,18 +1858,18 @@
 *
 * Warning: Does not respect endstops!
 */
-//#define BABYSTEPPING
+#define BABYSTEPPING
 #if ENABLED(BABYSTEPPING)
-  //#define INTEGRATED_BABYSTEPPING         // EXPERIMENTAL integration of babystepping into the Stepper ISR
+  #define INTEGRATED_BABYSTEPPING         // EXPERIMENTAL integration of babystepping into the Stepper ISR
  //#define BABYSTEP_WITHOUT_HOMING
-  //#define BABYSTEP_ALWAYS_AVAILABLE       // Allow babystepping at all times (not just during movement).
+  #define BABYSTEP_ALWAYS_AVAILABLE       // Allow babystepping at all times (not just during movement).
  //#define BABYSTEP_XY                     // Also enable X/Y Babystepping. Not supported on DELTA!
  #define BABYSTEP_INVERT_Z false           // Change if Z babysteps should go the other way
  //#define BABYSTEP_MILLIMETER_UNITS       // Specify BABYSTEP_MULTIPLICATOR_(XY|Z) in mm instead of micro-steps
-  #define BABYSTEP_MULTIPLICATOR_Z  1       // (steps or mm) Steps or millimeter distance for each Z babystep
+  #define BABYSTEP_MULTIPLICATOR_Z  10       // (steps or mm) Steps or millimeter distance for each Z babystep
  #define BABYSTEP_MULTIPLICATOR_XY 1       // (steps or mm) Steps or millimeter distance for each XY babystep

-  //#define DOUBLECLICK_FOR_Z_BABYSTEPPING  // Double-click on the Status Screen for Z Babystepping.
+  #define DOUBLECLICK_FOR_Z_BABYSTEPPING  // Double-click on the Status Screen for Z Babystepping.
  #if ENABLED(DOUBLECLICK_FOR_Z_BABYSTEPPING)
    #define DOUBLECLICK_MAX_INTERVAL 1250   // Maximum interval between clicks, in milliseconds.
                                            // Note: Extra time may be added to mitigate controller latency.
@@ -1814,8 +1880,9 @@
  #endif

  //#define BABYSTEP_DISPLAY_TOTAL          // Display total babysteps since last G28
-
-  //#define BABYSTEP_ZPROBE_OFFSET          // Combine M851 Z and Babystepping
+  #if NONE(TronxyX3, TronxyXY2)
+    #define BABYSTEP_ZPROBE_OFFSET          // Combine M851 Z and Babystepping
+  #endif
  #if ENABLED(BABYSTEP_ZPROBE_OFFSET)
    //#define BABYSTEP_HOTEND_Z_OFFSET      // For multiple hotends, babystep relative Z offsets
    //#define BABYSTEP_ZPROBE_GFX_OVERLAY   // Enable graphical overlay on Z-offset editor
@@ -1942,30 +2009,30 @@
    //#define USE_TEMP_EXT_COMPENSATION

    // Probe temperature calibration generates a table of values starting at PTC_SAMPLE_START
-    // (e.g. 30), in steps of PTC_SAMPLE_RES (e.g. 5) with PTC_SAMPLE_COUNT (e.g. 10) samples.
+    // (e.g., 30), in steps of PTC_SAMPLE_RES (e.g., 5) with PTC_SAMPLE_COUNT (e.g., 10) samples.

-    //#define PTC_SAMPLE_START  30.0f
-    //#define PTC_SAMPLE_RES    5.0f
-    //#define PTC_SAMPLE_COUNT  10U
+    //#define PTC_SAMPLE_START  30  // (°C)
+    //#define PTC_SAMPLE_RES     5  // (°C)
+    //#define PTC_SAMPLE_COUNT  10

    // Bed temperature calibration builds a similar table.

-    //#define BTC_SAMPLE_START  60.0f
-    //#define BTC_SAMPLE_RES    5.0f
-    //#define BTC_SAMPLE_COUNT  10U
+    //#define BTC_SAMPLE_START  60  // (°C)
+    //#define BTC_SAMPLE_RES     5  // (°C)
+    //#define BTC_SAMPLE_COUNT  10

    // The temperature the probe should be at while taking measurements during bed temperature
    // calibration.
-    //#define BTC_PROBE_TEMP 30.0f
+    //#define BTC_PROBE_TEMP    30  // (°C)

-    // Height above Z=0.0f to raise the nozzle. Lowering this can help the probe to heat faster.
-    // Note: the Z=0.0f offset is determined by the probe offset which can be set using M851.
-    //#define PTC_PROBE_HEATING_OFFSET 0.5f
+    // Height above Z=0.0 to raise the nozzle. Lowering this can help the probe to heat faster.
+    // Note: the Z=0.0 offset is determined by the probe offset which can be set using M851.
+    //#define PTC_PROBE_HEATING_OFFSET 0.5

    // Height to raise the Z-probe between heating and taking the next measurement. Some probes
    // may fail to untrigger if they have been triggered for a long time, which can be solved by
    // increasing the height the probe is raised to.
-    //#define PTC_PROBE_RAISE 15U
+    //#define PTC_PROBE_RAISE 15

    // If the probe is outside of the defined range, use linear extrapolation using the closest
    // point and the PTC_LINEAR_EXTRAPOLATION'th next point. E.g. if set to 4 it will use data[0]
@@ -2080,7 +2147,7 @@
 // @section motion

 // The number of linear moves that can be in the planner at once.
-// The value of BLOCK_BUFFER_SIZE must be a power of 2 (e.g. 8, 16, 32)
+// The value of BLOCK_BUFFER_SIZE must be a power of 2 (e.g., 8, 16, 32)
 #if BOTH(SDSUPPORT, DIRECT_STEPPING)
  #define BLOCK_BUFFER_SIZE  8
 #elif ENABLED(SDSUPPORT)
@@ -2140,7 +2207,7 @@
 * Currently handles M108, M112, M410, M876
 * NOTE: Not yet implemented for all platforms.
 */
-//#define EMERGENCY_PARSER
+#define EMERGENCY_PARSER

 /**
 * Realtime Reporting (requires EMERGENCY_PARSER)
@@ -2236,6 +2303,13 @@
    //#define EVENT_GCODE_AFTER_TOOLCHANGE "G12X"   // Extra G-code to run after tool-change
  #endif

+  /**
+   * Extra G-code to run while executing tool-change commands. Can be used to use an additional
+   * stepper motor (I axis, see option LINEAR_AXES in Configuration.h) to drive the tool-changer.
+   */
+  //#define EVENT_GCODE_TOOLCHANGE_T0 "G28 A\nG1 A0" // Extra G-code to run while executing tool-change command T0
+  //#define EVENT_GCODE_TOOLCHANGE_T1 "G1 A10"       // Extra G-code to run while executing tool-change command T1
+
  /**
   * Tool Sensors detect when tools have been picked up or dropped.
   * Requires the pins TOOL_SENSOR1_PIN, TOOL_SENSOR2_PIN, etc.
@@ -2310,7 +2384,7 @@
 *
 * Enable PARK_HEAD_ON_PAUSE to add the G-code M125 Pause and Park.
 */
-//#define ADVANCED_PAUSE_FEATURE
+#define ADVANCED_PAUSE_FEATURE
 #if ENABLED(ADVANCED_PAUSE_FEATURE)
  #define PAUSE_PARK_RETRACT_FEEDRATE         60  // (mm/s) Initial retract feedrate.
  #define PAUSE_PARK_RETRACT_LENGTH            2  // (mm) Initial retract.
@@ -2348,7 +2422,7 @@
  #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.
  #define PAUSE_PARK_NO_STEPPER_TIMEOUT           // Enable for XYZ steppers to stay powered on during filament change.

-  //#define PARK_HEAD_ON_PAUSE                    // Park the nozzle during pause and filament change.
+  #define PARK_HEAD_ON_PAUSE                    // Park the nozzle during pause and filament change.
  //#define HOME_BEFORE_FILAMENT_CHANGE           // If needed, home before parking for filament change

  //#define FILAMENT_LOAD_UNLOAD_GCODES           // Add M701/M702 Load/Unload G-codes, plus Load/Unload in the LCD Prepare menu.
@@ -2413,6 +2487,24 @@
    #define Z4_MICROSTEPS       Z_MICROSTEPS
  #endif

+  #if AXIS_DRIVER_TYPE_I(TMC26X)
+    #define I_MAX_CURRENT    1000
+    #define I_SENSE_RESISTOR   91
+    #define I_MICROSTEPS       16
+  #endif
+
+  #if AXIS_DRIVER_TYPE_J(TMC26X)
+    #define J_MAX_CURRENT    1000
+    #define J_SENSE_RESISTOR   91
+    #define J_MICROSTEPS       16
+  #endif
+
+  #if AXIS_DRIVER_TYPE_K(TMC26X)
+    #define K_MAX_CURRENT    1000
+    #define K_SENSE_RESISTOR   91
+    #define K_MICROSTEPS       16
+  #endif
+
  #if AXIS_DRIVER_TYPE_E0(TMC26X)
    #define E0_MAX_CURRENT    1000
    #define E0_SENSE_RESISTOR   91
@@ -2563,6 +2655,33 @@
    //#define Z4_INTERPOLATE true
  #endif

+  #if AXIS_IS_TMC(I)
+    #define I_CURRENT      800
+    #define I_CURRENT_HOME I_CURRENT
+    #define I_MICROSTEPS    16
+    #define I_RSENSE         0.11
+    #define I_CHAIN_POS     -1
+    //#define I_INTERPOLATE  true
+  #endif
+
+  #if AXIS_IS_TMC(J)
+    #define J_CURRENT      800
+    #define J_CURRENT_HOME J_CURRENT
+    #define J_MICROSTEPS    16
+    #define J_RSENSE         0.11
+    #define J_CHAIN_POS     -1
+    //#define J_INTERPOLATE  true
+  #endif
+
+  #if AXIS_IS_TMC(K)
+    #define K_CURRENT      800
+    #define K_CURRENT_HOME K_CURRENT
+    #define K_MICROSTEPS    16
+    #define K_RSENSE         0.11
+    #define K_CHAIN_POS     -1
+    //#define K_INTERPOLATE  true
+  #endif
+
  #if AXIS_IS_TMC(E0)
    #define E0_CURRENT      800
    #define E0_MICROSTEPS    16
@@ -2638,6 +2757,10 @@
  //#define Y2_CS_PIN         -1
  //#define Z2_CS_PIN         -1
  //#define Z3_CS_PIN         -1
+  //#define Z4_CS_PIN         -1
+  //#define I_CS_PIN          -1
+  //#define J_CS_PIN          -1
+  //#define K_CS_PIN          -1
  //#define E0_CS_PIN         -1
  //#define E1_CS_PIN         -1
  //#define E2_CS_PIN         -1
@@ -2677,6 +2800,9 @@
  //#define Z2_SLAVE_ADDRESS 0
  //#define Z3_SLAVE_ADDRESS 0
  //#define Z4_SLAVE_ADDRESS 0
+  //#define  I_SLAVE_ADDRESS 0
+  //#define  J_SLAVE_ADDRESS 0
+  //#define  K_SLAVE_ADDRESS 0
  //#define E0_SLAVE_ADDRESS 0
  //#define E1_SLAVE_ADDRESS 0
  //#define E2_SLAVE_ADDRESS 0
@@ -2701,6 +2827,9 @@
   */
  #define STEALTHCHOP_XY
  #define STEALTHCHOP_Z
+  #define STEALTHCHOP_I
+  #define STEALTHCHOP_J
+  #define STEALTHCHOP_K
  #define STEALTHCHOP_E

  /**
@@ -2772,6 +2901,9 @@
  #define Z2_HYBRID_THRESHOLD      3
  #define Z3_HYBRID_THRESHOLD      3
  #define Z4_HYBRID_THRESHOLD      3
+  #define I_HYBRID_THRESHOLD       3
+  #define J_HYBRID_THRESHOLD       3
+  #define K_HYBRID_THRESHOLD       3
  #define E0_HYBRID_THRESHOLD     30
  #define E1_HYBRID_THRESHOLD     30
  #define E2_HYBRID_THRESHOLD     30
@@ -2797,7 +2929,7 @@
   *
   * It is recommended to set HOMING_BUMP_MM to { 0, 0, 0 }.
   *
-   * SPI_ENDSTOPS  *** Beta feature! *** TMC2130 Only ***
+   * SPI_ENDSTOPS  *** Beta feature! *** TMC2130/TMC5160 Only ***
   * Poll the driver through SPI to determine load when homing.
   * Removes the need for a wire from DIAG1 to an endstop pin.
   *
@@ -2818,6 +2950,9 @@
    //#define Z2_STALL_SENSITIVITY Z_STALL_SENSITIVITY
    //#define Z3_STALL_SENSITIVITY Z_STALL_SENSITIVITY
    //#define Z4_STALL_SENSITIVITY Z_STALL_SENSITIVITY
+    //#define I_STALL_SENSITIVITY  8
+    //#define J_STALL_SENSITIVITY  8
+    //#define K_STALL_SENSITIVITY  8
    //#define SPI_ENDSTOPS              // TMC2130 only
    //#define IMPROVE_HOMING_RELIABILITY
  #endif
@@ -2958,6 +3093,33 @@
    #define Z4_SLEW_RATE                 1
  #endif

+  #if AXIS_DRIVER_TYPE_I(L6470)
+    #define I_MICROSTEPS      128
+    #define I_OVERCURRENT    2000
+    #define I_STALLCURRENT   1500
+    #define I_MAX_VOLTAGE     127
+    #define I_CHAIN_POS        -1
+    #define I_SLEW_RATE         1
+  #endif
+
+  #if AXIS_DRIVER_TYPE_J(L6470)
+    #define J_MICROSTEPS      128
+    #define J_OVERCURRENT    2000
+    #define J_STALLCURRENT   1500
+    #define J_MAX_VOLTAGE     127
+    #define J_CHAIN_POS        -1
+    #define J_SLEW_RATE         1
+  #endif
+
+  #if AXIS_DRIVER_TYPE_K(L6470)
+    #define K_MICROSTEPS      128
+    #define K_OVERCURRENT    2000
+    #define K_STALLCURRENT   1500
+    #define K_MAX_VOLTAGE     127
+    #define K_CHAIN_POS        -1
+    #define K_SLEW_RATE         1
+  #endif
+
  #if AXIS_IS_L64XX(E0)
    #define E0_MICROSTEPS              128
    #define E0_OVERCURRENT            2000
@@ -3307,8 +3469,18 @@
      #define SPINDLE_LASER_POWERDOWN_DELAY   50 // (ms) Delay to allow the spindle to stop

    #endif
+
+    //
+    // Laser I2C Ammeter (High precision INA226 low/high side module)
+    //
+    //#define I2C_AMMETER
+    #if ENABLED(I2C_AMMETER)
+      #define I2C_AMMETER_IMAX            0.1    // (Amps) Calibration value for the expected current range
+      #define I2C_AMMETER_SHUNT_RESISTOR  0.1    // (Ohms) Calibration shunt resistor value
+    #endif
+
  #endif
-#endif
+#endif // SPINDLE_FEATURE || LASER_FEATURE

 /**
 * Synchronous Laser Control with M106/M107
@@ -3322,6 +3494,16 @@
 */
 //#define LASER_SYNCHRONOUS_M106_M107

+/**
+ * Synchronous Laser Control with M106/M107
+ *
+ * By default M106 / M107 applies the new fan speed immediately. This is fine
+ * for fans, but unsuitable for a PWM/TTL laser attached to the fan header.
+ *
+ * NOTE: This option sacrifices some cooling fan speed options.
+ */
+//#define LASER_SYNCHRONOUS_M106_M107
+
 /**
 * Coolant Control
 *
@@ -3649,10 +3831,11 @@
 * Host Prompt Support enables Marlin to use the host for user prompts so
 * filament runout and other processes can be managed from the host side.
 */
-//#define HOST_ACTION_COMMANDS
+#define HOST_ACTION_COMMANDS
 #if ENABLED(HOST_ACTION_COMMANDS)
-  //#define HOST_PROMPT_SUPPORT
-  //#define HOST_START_MENU_ITEM  // Add a menu item that tells the host to start
+  //#define HOST_PAUSE_M76
+  #define HOST_PROMPT_SUPPORT
+  #define HOST_START_MENU_ITEM  // Add a menu item that tells the host to start
 #endif

 /**
@@ -3948,6 +4131,8 @@
    #define MMU2_CAN_LOAD_INCREMENT_SEQUENCE \
      { -MMU2_CAN_LOAD_INCREMENT, MMU2_CAN_LOAD_FEEDRATE }

+    // Continue unloading if sensor detects filament after the initial unload move
+    //#define MMU_IR_UNLOAD_MOVE
  #else

    /**
@@ -4001,11 +4186,19 @@
 //
 // M43 - display pin status, toggle pins, watch pins, watch endstops & toggle LED, test servo probe
 //
-//#define PINS_DEBUGGING
+#define PINS_DEBUGGING

 // Enable Marlin dev mode which adds some special commands
 //#define MARLIN_DEV_MODE

+#if ENABLED(MARLIN_DEV_MODE)
+  /**
+   * D576 - Buffer Monitoring
+   * To help diagnose print quality issues stemming from empty command buffers.
+   */
+  //#define BUFFER_MONITORING
+#endif
+
 /**
 * Postmortem Debugging captures misbehavior and outputs the CPU status and backtrace to serial.
 * When running in the debugger it will break for debugging. This is useful to help understand
@@ -41,7 +41,7 @@
 * here we define this default string as the date where the latest release
 * version was tagged.
 */
-//#define STRING_DISTRIBUTION_DATE "2019-07-10"
+//#define STRING_DISTRIBUTION_DATE "2021-07-31"

 /**
 * Defines a generic printer name to be output to the LCD after booting Marlin.
@@ -186,7 +186,7 @@ inline void HAL_adc_init() {
 #define GET_PIN_MAP_INDEX(pin) pin
 #define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)

-#define HAL_SENSITIVE_PINS 0, 1
+#define HAL_SENSITIVE_PINS 0, 1,

 #ifdef __AVR_AT90USB1286__
  #define JTAG_DISABLE() do{ MCUCR = 0x80; MCUCR = 0x80; }while(0)
@@ -168,6 +168,51 @@ void setup_endstop_interrupts() {
      pciSetup(Z_MIN_PIN);
    #endif
  #endif
+  #if HAS_I_MAX
+    #if (digitalPinToInterrupt(I_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(I_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(I_MAX_PIN), "I_MAX_PIN is not interrupt-capable");
+      pciSetup(I_MAX_PIN);
+    #endif
+  #elif HAS_I_MIN
+    #if (digitalPinToInterrupt(I_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(I_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(I_MIN_PIN), "I_MIN_PIN is not interrupt-capable");
+      pciSetup(I_MIN_PIN);
+    #endif
+  #endif
+  #if HAS_J_MAX
+    #if (digitalPinToInterrupt(J_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(J_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(J_MAX_PIN), "J_MAX_PIN is not interrupt-capable");
+      pciSetup(J_MAX_PIN);
+    #endif
+  #elif HAS_J_MIN
+    #if (digitalPinToInterrupt(J_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(J_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(J_MIN_PIN), "J_MIN_PIN is not interrupt-capable");
+      pciSetup(J_MIN_PIN);
+    #endif
+  #endif
+  #if HAS_K_MAX
+    #if (digitalPinToInterrupt(K_MAX_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(K_MAX_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(K_MAX_PIN), "K_MAX_PIN is not interrupt-capable");
+      pciSetup(K_MAX_PIN);
+    #endif
+  #elif HAS_K_MIN
+    #if (digitalPinToInterrupt(K_MIN_PIN) != NOT_AN_INTERRUPT)
+      _ATTACH(K_MIN_PIN);
+    #else
+      static_assert(digitalPinHasPCICR(K_MIN_PIN), "K_MIN_PIN is not interrupt-capable");
+      pciSetup(K_MIN_PIN);
+    #endif
+  #endif
  #if HAS_X2_MAX
    #if (digitalPinToInterrupt(X2_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(X2_MAX_PIN);
@@ -256,6 +301,5 @@ void setup_endstop_interrupts() {
      pciSetup(Z_MIN_PROBE_PIN);
    #endif
  #endif
-
  // If we arrive here without raising an assertion, each pin has either an EXT-interrupt or a PCI.
 }
@@ -62,7 +62,7 @@
 #include "../shared/Marduino.h"
 #include "../shared/Delay.h"

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
 volatile uint8_t *u8g_outData, *u8g_outClock;
@@ -240,7 +240,7 @@
  }

  // all the others
-  static uint32_t spiDelayCyclesX4 = 4 * (F_CPU) / 1000000; // 4µs => 125khz
+  static uint16_t spiDelayNS = 4000; // 4000ns => 125khz

  static uint8_t spiTransferX(uint8_t b) { // using Mode 0
    int bits = 8;
@@ -249,12 +249,12 @@
      b <<= 1; // little setup time

      WRITE(SD_SCK_PIN, HIGH);
-      DELAY_CYCLES(spiDelayCyclesX4);
+      DELAY_NS(spiDelayNS);

      b |= (READ(SD_MISO_PIN) != 0);

      WRITE(SD_SCK_PIN, LOW);
-      DELAY_CYCLES(spiDelayCyclesX4);
+      DELAY_NS(spiDelayNS);
    } while (--bits);
    return b;
  }
@@ -510,7 +510,7 @@
        spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;
        break;
      default:
-        spiDelayCyclesX4 = ((F_CPU) / 1000000) >> (6 - spiRate) << 2; // spiRate of 2 gives the maximum error with current CPU
+        spiDelayNS = 4000 >> (6 - spiRate); // spiRate of 2 gives the maximum error with current CPU
        spiTransferTx = (pfnSpiTransfer)spiTransferX;
        spiTransferRx = (pfnSpiTransfer)spiTransferX;
        spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;
@@ -60,7 +60,7 @@

 #if HAS_MARLINUI_U8GLIB

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 #include "../../../MarlinCore.h"

@@ -62,7 +62,7 @@
 #include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 #include "u8g_com_HAL_DUE_sw_spi_shared.h"

@@ -64,7 +64,7 @@
 #include "../../shared/Marduino.h"
 #include "../../shared/Delay.h"

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 #if ENABLED(FYSETC_MINI_12864)
  #define SPISEND_SW_DUE u8g_spiSend_sw_DUE_mode_3
@@ -62,7 +62,7 @@
 #include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 #include "u8g_com_HAL_DUE_sw_spi_shared.h"

@@ -23,7 +23,7 @@

 #include "../../../inc/MarlinConfigPre.h"
 #include "../../shared/Marduino.h"
-#include <U8glib.h>
+#include <U8glib-HAL.h>

 void u8g_SetPIOutput_DUE(u8g_t *u8g, uint8_t pin_index);
 void u8g_SetPILevel_DUE(u8g_t *u8g, uint8_t pin_index, uint8_t level);
@@ -64,4 +64,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -59,4 +59,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -40,7 +40,7 @@ struct GpioEvent {
  pin_type pin_id;
  GpioEvent::Type event;

-  GpioEvent(uint64_t timestamp, pin_type pin_id, GpioEvent::Type event){
+  GpioEvent(uint64_t timestamp, pin_type pin_id, GpioEvent::Type event) {
    this->timestamp = timestamp;
    this->pin_id = pin_id;
    this->event = event;
@@ -51,7 +51,7 @@ void LinearAxis::update() {
 }

 void LinearAxis::interrupt(GpioEvent ev) {
-  if (ev.pin_id == step_pin && !Gpio::pin_map[enable_pin].value){
+  if (ev.pin_id == step_pin && !Gpio::pin_map[enable_pin].value) {
    if (ev.event == GpioEvent::RISE) {
      last_update = ev.timestamp;
      position += -1 + 2 * Gpio::pin_map[dir_pin].value;
@@ -52,7 +52,7 @@ public:
    return (*(intptr_t*)timerid);
  }

-  static void handler(int sig, siginfo_t *si, void *uc){
+  static void handler(int sig, siginfo_t *si, void *uc) {
    Timer* _this = (Timer*)si->si_value.sival_ptr;
    _this->avg_error += (Clock::nanos() - _this->start_time) - _this->period; //high_resolution_clock is also limited in precision, but best we have
    _this->avg_error /= 2; //very crude precision analysis (actually within +-500ns usually)
@@ -25,43 +25,6 @@

 #include "../../../gcode/parser.h"

-uint8_t analog_offset = NUM_DIGITAL_PINS - NUM_ANALOG_INPUTS;
-
-// Get the digital pin for an analog index
-pin_t analogInputToDigitalPin(const int8_t p) {
-  return (WITHIN(p, 0, NUM_ANALOG_INPUTS) ? analog_offset + p : P_NC);
-}
-
-// Return the index of a pin number
-int16_t GET_PIN_MAP_INDEX(const pin_t pin) {
-  return pin;
-}
-
-// Test whether the pin is valid
-bool VALID_PIN(const pin_t p) {
-  return WITHIN(p, 0, NUM_DIGITAL_PINS);
-}
-
-// Get the analog index for a digital pin
-int8_t DIGITAL_PIN_TO_ANALOG_PIN(const pin_t p) {
-  return (WITHIN(p, analog_offset, NUM_DIGITAL_PINS) ? p - analog_offset : P_NC);
-}
-
-// Test whether the pin is PWM
-bool PWM_PIN(const pin_t p) {
-  return false;
-}
-
-// Test whether the pin is interruptable
-bool INTERRUPT_PIN(const pin_t p) {
-  return false;
-}
-
-// Get the pin number at the given index
-pin_t GET_PIN_MAP_PIN(const int16_t ind) {
-  return ind;
-}
-
 int16_t PARSED_PIN_INDEX(const char code, const int16_t dval) {
  return parser.intval(code, dval);
 }
@@ -34,26 +34,32 @@ constexpr uint8_t NUM_ANALOG_INPUTS = 16;

 #define HAL_SENSITIVE_PINS

+constexpr uint8_t analog_offset = NUM_DIGITAL_PINS - NUM_ANALOG_INPUTS;
+
 // Get the digital pin for an analog index
-pin_t analogInputToDigitalPin(const int8_t p);
-
-// Return the index of a pin number
-int16_t GET_PIN_MAP_INDEX(const pin_t pin);
-
-// Test whether the pin is valid
-bool VALID_PIN(const pin_t p);
+constexpr pin_t analogInputToDigitalPin(const int8_t p) {
+  return (WITHIN(p, 0, NUM_ANALOG_INPUTS) ? analog_offset + p : P_NC);
+}

 // Get the analog index for a digital pin
-int8_t DIGITAL_PIN_TO_ANALOG_PIN(const pin_t p);
+constexpr int8_t DIGITAL_PIN_TO_ANALOG_PIN(const pin_t p) {
+  return (WITHIN(p, analog_offset, NUM_DIGITAL_PINS) ? p - analog_offset : P_NC);
+}
+
+// Return the index of a pin number
+constexpr int16_t GET_PIN_MAP_INDEX(const pin_t pin) { return pin; }
+
+// Test whether the pin is valid
+constexpr bool VALID_PIN(const pin_t p) { return WITHIN(p, 0, NUM_DIGITAL_PINS); }

 // Test whether the pin is PWM
-bool PWM_PIN(const pin_t p);
+constexpr bool PWM_PIN(const pin_t p) { return false; }

 // Test whether the pin is interruptable
-bool INTERRUPT_PIN(const pin_t p);
+constexpr bool INTERRUPT_PIN(const pin_t p) { return false; }

 // Get the pin number at the given index
-pin_t GET_PIN_MAP_PIN(const int16_t ind);
+constexpr pin_t GET_PIN_MAP_PIN(const int16_t ind) { return ind; }

 // Parse a G-code word into a pin index
 int16_t PARSED_PIN_INDEX(const char code, const int16_t dval);
@@ -198,7 +198,7 @@ constexpr pin_t GET_PIN_MAP_PIN(const int16_t index) {
 // Parse a G-code word into a pin index
 int16_t PARSED_PIN_INDEX(const char code, const int16_t dval);
 // P0.6 thru P0.9 are for the onboard SD card
-#define HAL_SENSITIVE_PINS P0_06, P0_07, P0_08, P0_09
+#define HAL_SENSITIVE_PINS P0_06, P0_07, P0_08, P0_09,

 #define HAL_IDLETASK 1
 void HAL_idletask();
@@ -66,11 +66,7 @@

  #include <SoftwareSPI.h>

-  #ifndef HAL_SPI_SPEED
-    #define HAL_SPI_SPEED SPI_FULL_SPEED
-  #endif
-
-  static uint8_t SPI_speed = HAL_SPI_SPEED;
+  static uint8_t SPI_speed = SPI_FULL_SPEED;

  static uint8_t spiTransfer(uint8_t b) {
    return swSpiTransfer(b, SPI_speed, SD_SCK_PIN, SD_MISO_PIN, SD_MOSI_PIN);
@@ -106,15 +102,13 @@

 #else

-  #ifndef HAL_SPI_SPEED
-    #ifdef SD_SPI_SPEED
-      #define HAL_SPI_SPEED SD_SPI_SPEED
-    #else
-      #define HAL_SPI_SPEED SPI_FULL_SPEED
-    #endif
+  #ifdef SD_SPI_SPEED
+    #define INIT_SPI_SPEED SD_SPI_SPEED
+  #else
+    #define INIT_SPI_SPEED SPI_FULL_SPEED
  #endif

-  void spiBegin() { spiInit(HAL_SPI_SPEED); } // Set up SCK, MOSI & MISO pins for SSP0
+  void spiBegin() { spiInit(INIT_SPI_SPEED); } // Set up SCK, MOSI & MISO pins for SSP0

  void spiInit(uint8_t spiRate) {
    #if SD_MISO_PIN == BOARD_SPI1_MISO_PIN
@@ -122,4 +122,37 @@ void setup_endstop_interrupts() {
    #endif
    _ATTACH(Z_MIN_PROBE_PIN);
  #endif
+  #if HAS_I_MAX
+    #if !LPC1768_PIN_INTERRUPT_M(I_MAX_PIN)
+      #error "I_MAX_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(I_MAX_PIN);
+  #elif HAS_I_MIN
+    #if !LPC1768_PIN_INTERRUPT_M(I_MIN_PIN)
+      #error "I_MIN_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(I_MIN_PIN);
+  #endif
+  #if HAS_J_MAX
+    #if !LPC1768_PIN_INTERRUPT_M(J_MAX_PIN)
+      #error "J_MAX_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(J_MAX_PIN);
+  #elif HAS_J_MIN
+    #if !LPC1768_PIN_INTERRUPT_M(J_MIN_PIN)
+      #error "J_MIN_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(J_MIN_PIN);
+  #endif
+  #if HAS_K_MAX
+    #if !LPC1768_PIN_INTERRUPT_M(K_MAX_PIN)
+      #error "K_MAX_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(K_MAX_PIN);
+  #elif HAS_K_MIN
+    #if !LPC1768_PIN_INTERRUPT_M(K_MIN_PIN)
+      #error "K_MIN_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(K_MIN_PIN);
+  #endif
 }
@@ -146,7 +146,7 @@ static_assert(DISABLED(BAUD_RATE_GCODE), "BAUD_RATE_GCODE is not yet supported o
    #error "Serial port pins (2) conflict with other pins!"
  #elif Y_HOME_TO_MIN && IS_TX2(Y_STOP_PIN)
    #error "Serial port pins (2) conflict with Y endstop pin!"
-  #elif HAS_CUSTOM_PROBE_PIN && IS_TX2(Z_MIN_PROBE_PIN)
+  #elif USES_Z_MIN_PROBE_PIN && IS_TX2(Z_MIN_PROBE_PIN)
    #error "Serial port pins (2) conflict with probe pin!"
  #elif ANY_TX(2, X_ENABLE_PIN, Y_ENABLE_PIN) || ANY_RX(2, X_DIR_PIN, Y_DIR_PIN)
    #error "Serial port pins (2) conflict with X/Y stepper pins!"
@@ -237,7 +237,7 @@ static_assert(DISABLED(BAUD_RATE_GCODE), "BAUD_RATE_GCODE is not yet supported o
    #define PIN_IS_SCL2(P) (P##_PIN == P0_11)
    #if PIN_IS_SDA2(Y_STOP)
      #error "i2c SDA2 overlaps with Y endstop pin!"
-    #elif HAS_CUSTOM_PROBE_PIN && PIN_IS_SDA2(Z_MIN_PROBE)
+    #elif USES_Z_MIN_PROBE_PIN && PIN_IS_SDA2(Z_MIN_PROBE)
      #error "i2c SDA2 overlaps with Z probe pin!"
    #elif PIN_IS_SDA2(X_ENABLE) || PIN_IS_SDA2(Y_ENABLE)
      #error "i2c SDA2 overlaps with X/Y ENABLE pin!"
@@ -54,7 +54,7 @@ enum XPTCoordinate : uint8_t {
  XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
 };

-#if !defined(XPT2046_Z1_THRESHOLD)
+#ifndef XPT2046_Z1_THRESHOLD
  #define XPT2046_Z1_THRESHOLD 10
 #endif

@@ -59,7 +59,7 @@

 #if HAS_MARLINUI_U8GLIB

-#include <U8glib.h>
+#include <U8glib-HAL.h>
 #include "../../shared/HAL_SPI.h"

 #ifndef LCD_SPI_SPEED
@@ -79,7 +79,7 @@

 #if HAS_MARLINUI_U8GLIB

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 #define I2C_SLA         (0x3C*2)
 //#define I2C_CMD_MODE  0x080
@@ -59,7 +59,7 @@

 #if HAS_MARLINUI_U8GLIB

-#include <U8glib.h>
+#include <U8glib-HAL.h>
 #include "../../shared/HAL_SPI.h"
 #include "../../shared/Delay.h"

@@ -59,7 +59,7 @@

 #if ENABLED(U8GLIB_ST7920)

-#include <U8glib.h>
+#include <U8glib-HAL.h>
 #include <SoftwareSPI.h>
 #include "../../shared/Delay.h"
 #include "../../shared/HAL_SPI.h"
@@ -71,7 +71,7 @@
 #include <LPC17xx.h>
 #include <gpio.h>

-#include <U8glib.h>
+#include <U8glib-HAL.h>

 uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {

@@ -0,0 +1,217 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * 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
+#define HAL_IDLETASK
+void HAL_idletask();
+
+#define F_CPU 100000000
+#define SystemCoreClock F_CPU
+#include <stdint.h>
+#include <stdarg.h>
+
+#undef min
+#undef max
+
+#include <algorithm>
+#include "pinmapping.h"
+
+void _printf (const  char *format, ...);
+void _putc(uint8_t c);
+uint8_t _getc();
+
+//extern "C" volatile uint32_t _millis;
+
+//arduino: Print.h
+#define DEC 10
+#define HEX 16
+#define OCT  8
+#define BIN  2
+//arduino: binary.h (weird defines)
+#define B01 1
+#define B10 2
+
+#include "../shared/Marduino.h"
+#include "../shared/math_32bit.h"
+#include "../shared/HAL_SPI.h"
+#include "fastio.h"
+#include "watchdog.h"
+#include "serial.h"
+
+#define SHARED_SERVOS HAS_SERVOS
+
+extern MSerialT serial_stream_0;
+extern MSerialT serial_stream_1;
+extern MSerialT serial_stream_2;
+extern MSerialT serial_stream_3;
+
+#define _MSERIAL(X) serial_stream_##X
+#define MSERIAL(X) _MSERIAL(X)
+
+#if WITHIN(SERIAL_PORT, 0, 3)
+  #define MYSERIAL1 MSERIAL(SERIAL_PORT)
+#else
+  #error "SERIAL_PORT must be from 0 to 3. Please update your configuration."
+#endif
+
+#ifdef SERIAL_PORT_2
+  #if WITHIN(SERIAL_PORT_2, 0, 3)
+    #define MYSERIAL2 MSERIAL(SERIAL_PORT_2)
+  #else
+    #error "SERIAL_PORT_2 must be from 0 to 3. Please update your configuration."
+  #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. Please update your configuration."
+  #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. Please update your configuration."
+  #endif
+#endif
+
+
+#define ST7920_DELAY_1 DELAY_NS(600)
+#define ST7920_DELAY_2 DELAY_NS(750)
+#define ST7920_DELAY_3 DELAY_NS(750)
+
+//
+// Interrupts
+//
+#define CRITICAL_SECTION_START()
+#define CRITICAL_SECTION_END()
+#define ISRS_ENABLED()
+#define ENABLE_ISRS()
+#define DISABLE_ISRS()
+
+inline void HAL_init() {}
+
+// Utility functions
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+int freeMemory();
+#pragma GCC diagnostic pop
+
+// ADC
+#define HAL_ADC_VREF           5.0
+#define HAL_ADC_RESOLUTION    10
+#define HAL_ANALOG_SELECT(ch) HAL_adc_enable_channel(ch)
+#define HAL_START_ADC(ch)     HAL_adc_start_conversion(ch)
+#define HAL_READ_ADC()        HAL_adc_get_result()
+#define HAL_ADC_READY()       true
+
+void HAL_adc_init();
+void HAL_adc_enable_channel(const uint8_t ch);
+void HAL_adc_start_conversion(const uint8_t ch);
+uint16_t HAL_adc_get_result();
+
+// Reset source
+inline void HAL_clear_reset_source(void) {}
+inline uint8_t HAL_get_reset_source(void) { return RST_POWER_ON; }
+
+/* ---------------- Delay in cycles */
+
+#define DELAY_CYCLES(x) Kernel::delayCycles(x)
+#define SYSTEM_YIELD() Kernel::yield()
+
+// Maple Compatibility
+typedef void (*systickCallback_t)(void);
+void systick_attach_callback(systickCallback_t cb);
+extern volatile uint32_t systick_uptime_millis;
+
+// Marlin uses strstr in constexpr context, this is not supported, workaround by defining constexpr versions of the required functions.
+#define strstr(a, b) strstr_constexpr((a), (b))
+
+constexpr inline std::size_t strlen_constexpr(const char* str) {
+  // https://github.com/gcc-mirror/gcc/blob/5c7634a0e5f202935aa6c11b6ea953b8bf80a00a/libstdc%2B%2B-v3/include/bits/char_traits.h#L329
+  if (str != nullptr) {
+    std::size_t i = 0;
+    while (str[i] != '\0') {
+      ++i;
+    }
+
+    return i;
+  }
+
+  return 0;
+}
+
+constexpr inline int strncmp_constexpr(const char* lhs, const char* rhs, std::size_t count) {
+  // https://github.com/gcc-mirror/gcc/blob/13b9cbfc32fe3ac4c81c4dd9c42d141c8fb95db4/libstdc%2B%2B-v3/include/bits/char_traits.h#L655
+  if (lhs == nullptr || rhs == nullptr) {
+    return rhs != nullptr ? -1 : 1;
+  }
+
+  for (std::size_t i = 0; i < count; ++i) {
+    if (lhs[i] != rhs[i]) {
+      return lhs[i] < rhs[i] ? -1 : 1;
+    } else if (lhs[i] == '\0') {
+      return 0;
+    }
+  }
+
+  return 0;
+}
+
+constexpr inline const char* strstr_constexpr(const char* str, const char* target) {
+  // https://github.com/freebsd/freebsd/blob/master/sys/libkern/strstr.c
+  if (char c = target != nullptr ? *target++ : '\0'; c != '\0' && str != nullptr) {
+    std::size_t len = strlen_constexpr(target);
+    do {
+      char sc = {};
+      do {
+        if ((sc = *str++) == '\0') {
+          return nullptr;
+        }
+      } while (sc != c);
+    } while (strncmp_constexpr(str, target, len) != 0);
+    --str;
+  }
+
+  return str;
+}
+
+constexpr inline char* strstr_constexpr(char* str, const char* target) {
+  // https://github.com/freebsd/freebsd/blob/master/sys/libkern/strstr.c
+  if (char c = target != nullptr ? *target++ : '\0'; c != '\0' && str != nullptr) {
+    std::size_t len = strlen_constexpr(target);
+    do {
+      char sc = {};
+      do {
+        if ((sc = *str++) == '\0') {
+          return nullptr;
+        }
+      } while (sc != c);
+    } while (strncmp_constexpr(str, target, len) != 0);
+    --str;
+  }
+  return str;
+}
@@ -0,0 +1,26 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * 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;
@@ -0,0 +1,111 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Fast I/O Routines for X86_64
+ */
+
+#include "../shared/Marduino.h"
+#include <pinmapping.h>
+
+#define SET_DIR_INPUT(IO)     Gpio::setDir(IO, 1)
+#define SET_DIR_OUTPUT(IO)    Gpio::setDir(IO, 0)
+
+#define SET_MODE(IO, mode)    Gpio::setMode(IO, mode)
+
+#define WRITE_PIN_SET(IO)     Gpio::set(IO)
+#define WRITE_PIN_CLR(IO)     Gpio::clear(IO)
+
+#define READ_PIN(IO)          Gpio::get(IO)
+#define WRITE_PIN(IO,V)       Gpio::set(IO, V)
+
+/**
+ * Magic I/O routines
+ *
+ * Now you can simply SET_OUTPUT(STEP); WRITE(STEP, HIGH); WRITE(STEP, LOW);
+ *
+ * Why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+ */
+
+/// Read a pin
+#define _READ(IO)             READ_PIN(IO)
+
+/// Write to a pin
+#define _WRITE(IO,V)          WRITE_PIN(IO,V)
+
+/// toggle a pin
+#define _TOGGLE(IO)          _WRITE(IO, !READ(IO))
+
+/// set pin as input
+#define _SET_INPUT(IO)        SET_DIR_INPUT(IO)
+
+/// set pin as output
+#define _SET_OUTPUT(IO)       SET_DIR_OUTPUT(IO)
+
+/// set pin as input with pullup mode
+#define _PULLUP(IO,V)         pinMode(IO, (V) ? INPUT_PULLUP : INPUT)
+
+/// set pin as input with pulldown mode
+#define _PULLDOWN(IO,V)       pinMode(IO, (V) ? INPUT_PULLDOWN : INPUT)
+
+// hg42: all pins can be input or output (I hope)
+// hg42: undefined pins create compile error (IO, is no pin)
+// hg42: currently not used, but was used by pinsDebug
+
+/// check if pin is an input
+#define _IS_INPUT(IO)         (IO >= 0)
+
+/// check if pin is an output
+#define _IS_OUTPUT(IO)        (IO >= 0)
+
+/// Read a pin wrapper
+#define READ(IO)             _READ(IO)
+
+/// Write to a pin wrapper
+#define WRITE(IO,V)          _WRITE(IO,V)
+
+/// toggle a pin wrapper
+#define TOGGLE(IO)           _TOGGLE(IO)
+
+/// set pin as input wrapper
+#define SET_INPUT(IO)        _SET_INPUT(IO)
+/// set pin as input with pullup wrapper
+#define SET_INPUT_PULLUP(IO)  do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
+/// set pin as input with pulldown wrapper
+#define SET_INPUT_PULLDOWN(IO) do{ _SET_INPUT(IO); _PULLDOWN(IO, HIGH); }while(0)
+/// set pin as output wrapper  -  reads the pin and sets the output to that value
+#define SET_OUTPUT(IO)        do{ _WRITE(IO, _READ(IO)); _SET_OUTPUT(IO); }while(0)
+// set pin as PWM
+#define SET_PWM(IO)           SET_OUTPUT(IO)
+
+/// check if pin is an input wrapper
+#define IS_INPUT(IO)         _IS_INPUT(IO)
+/// check if pin is an output wrapper
+#define IS_OUTPUT(IO)        _IS_OUTPUT(IO)
+
+// Shorthand
+#define OUT_WRITE(IO,V)       do{ SET_OUTPUT(IO); WRITE(IO,V); }while(0)
+
+// digitalRead/Write wrappers
+#define extDigitalRead(IO)    digitalRead(IO)
+#define extDigitalWrite(IO,V) digitalWrite(IO,V)
@@ -0,0 +1,22 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
@@ -0,0 +1,31 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+// Add strcmp_P if missing
+#ifndef strcmp_P
+  #define strcmp_P(a, b) strcmp((a), (b))
+#endif
+
+#ifndef strcat_P
+  #define strcat_P(dest, src) strcat((dest), (src))
+#endif
@@ -0,0 +1,22 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
@@ -0,0 +1,43 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Test X86_64-specific configuration values for errors at compile-time.
+ */
+
+// Emulating RAMPS
+#if ENABLED(SPINDLE_LASER_PWM) && !(SPINDLE_LASER_PWM_PIN == 4 || SPINDLE_LASER_PWM_PIN == 6 || SPINDLE_LASER_PWM_PIN == 11)
+  #error "SPINDLE_LASER_PWM_PIN must use SERVO0, SERVO1 or SERVO3 connector"
+#endif
+
+#if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
+  #error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on LINUX."
+#endif
+
+#if HAS_TMC_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on LINUX."
+#endif
+
+#if ENABLED(POSTMORTEM_DEBUGGING)
+  #error "POSTMORTEM_DEBUGGING is not yet supported on LINUX."
+#endif
@@ -0,0 +1,59 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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/>.
+ *
+ */
+
+/**
+ * Support routines for X86_64
+ */
+
+/**
+ * Translation of routines & variables used by pinsDebug.h
+ */
+
+#define NUMBER_PINS_TOTAL NUM_DIGITAL_PINS
+#define pwm_details(pin) pin = pin    // do nothing  // print PWM details
+#define pwm_status(pin) false //Print a pin's PWM status. Return true if it's currently a PWM pin.
+#define IS_ANALOG(P) (DIGITAL_PIN_TO_ANALOG_PIN(P) >= 0 ? 1 : 0)
+#define digitalRead_mod(p)  digitalRead(p)
+#define PRINT_PORT(p)
+#define GET_ARRAY_PIN(p) pin_array[p].pin
+#define PRINT_ARRAY_NAME(x) do{ sprintf_P(buffer, PSTR("%-" STRINGIFY(MAX_NAME_LENGTH) "s"), pin_array[x].name); SERIAL_ECHO(buffer); }while(0)
+#define PRINT_PIN(p) do{ sprintf_P(buffer, PSTR("%3d "), p); SERIAL_ECHO(buffer); }while(0)
+#define MULTI_NAME_PAD 16 // space needed to be pretty if not first name assigned to a pin
+
+// active ADC function/mode/code values for PINSEL registers
+constexpr int8_t ADC_pin_mode(pin_t pin) {
+  return (-1);
+}
+
+int8_t get_pin_mode(pin_t pin) {
+  if (!VALID_PIN(pin)) return -1;
+  return 0;
+}
+
+bool GET_PINMODE(pin_t pin) {
+  int8_t pin_mode = get_pin_mode(pin);
+  if (pin_mode == -1 || pin_mode == ADC_pin_mode(pin)) // found an invalid pin or active analog pin
+    return false;
+
+  return (Gpio::getMode(pin) != 0); //input/output state
+}
+
+bool GET_ARRAY_IS_DIGITAL(pin_t pin) {
+  return (!IS_ANALOG(pin) || get_pin_mode(pin) != ADC_pin_mode(pin));
+}
@@ -0,0 +1,80 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * servo.h - Interrupt driven Servo library for Arduino using 16 bit timers- Version 2
+ * Copyright (c) 2009 Michael Margolis.  All right reserved.
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/**
+ * Based on "servo.h - Interrupt driven Servo library for Arduino using 16 bit timers -
+ *           Version 2 Copyright (c) 2009 Michael Margolis.  All right reserved.
+ *
+ * The only modification was to update/delete macros to match the LPC176x.
+ *
+ */
+
+#include <stdint.h>
+
+// Macros
+//values in microseconds
+#define MIN_PULSE_WIDTH       544     // the shortest pulse sent to a servo
+#define MAX_PULSE_WIDTH      2400     // the longest pulse sent to a servo
+#define DEFAULT_PULSE_WIDTH  1500     // default pulse width when servo is attached
+#define REFRESH_INTERVAL    20000     // minimum time to refresh servos in microseconds
+
+#define MAX_SERVOS             4
+
+#define INVALID_SERVO         255     // flag indicating an invalid servo index
+
+
+// Types
+
+typedef struct {
+  uint8_t nbr        : 8 ;            // a pin number from 0 to 254 (255 signals invalid pin)
+  uint8_t isActive   : 1 ;            // true if this channel is enabled, pin not pulsed if false
+} ServoPin_t;
+
+typedef struct {
+  ServoPin_t Pin;
+  unsigned int pulse_width;           // pulse width in microseconds
+} ServoInfo_t;
+
+// Global variables
+
+extern uint8_t ServoCount;
+extern ServoInfo_t servo_info[MAX_SERVOS];
@@ -0,0 +1,55 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "../../core/macros.h"
+#include "../../inc/MarlinConfigPre.h"
+
+#if BOTH(HAS_MARLINUI_U8GLIB, SDSUPPORT) && (LCD_PINS_D4 == SD_SCK_PIN || LCD_PINS_ENABLE == SD_MOSI_PIN || DOGLCD_SCK == SD_SCK_PIN || DOGLCD_MOSI == SD_MOSI_PIN)
+  #define LPC_SOFTWARE_SPI  // If the SD card and LCD adapter share the same SPI pins, then software SPI is currently
+                            // needed due to the speed and mode required for communicating with each device being different.
+                            // This requirement can be removed if the SPI access to these devices is updated to use
+                            // spiBeginTransaction.
+#endif
+
+// Onboard SD
+//#define SD_SCK_PIN     P0_07
+//#define SD_MISO_PIN    P0_08
+//#define SD_MOSI_PIN    P0_09
+//#define SD_SS_PIN      P0_06
+
+// External SD
+#ifndef SD_SCK_PIN
+  #define SD_SCK_PIN        50
+#endif
+#ifndef SD_MISO_PIN
+  #define SD_MISO_PIN       51
+#endif
+#ifndef SD_MOSI_PIN
+  #define SD_MOSI_PIN       52
+#endif
+#ifndef SD_SS_PIN
+  #define SD_SS_PIN         53
+#endif
+#ifndef SDSS
+  #define SDSS       SD_SS_PIN
+#endif
@@ -0,0 +1,64 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "../../../inc/MarlinConfig.h"
+
+#ifndef LCD_READ_ID
+  #define LCD_READ_ID  0x04   // Read display identification information (0xD3 on ILI9341)
+#endif
+#ifndef LCD_READ_ID4
+  #define LCD_READ_ID4 0xD3   // Read display identification information (0xD3 on ILI9341)
+#endif
+
+#define DATASIZE_8BIT    8
+#define DATASIZE_16BIT   16
+#define TFT_IO_DRIVER TFT_SPI
+
+#define DMA_MINC_ENABLE 1
+#define DMA_MINC_DISABLE 0
+
+class TFT_SPI {
+private:
+  static uint32_t ReadID(uint16_t Reg);
+  static void Transmit(uint16_t Data);
+  static void TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Count);
+
+public:
+  // static SPIClass SPIx;
+
+  static void Init();
+  static uint32_t GetID();
+  static bool isBusy();
+  static void Abort();
+
+  static void DataTransferBegin(uint16_t DataWidth = DATASIZE_16BIT);
+  static void DataTransferEnd();
+  static void DataTransferAbort();
+
+  static void WriteData(uint16_t Data);
+  static void WriteReg(uint16_t Reg);
+
+  static void WriteSequence(uint16_t *Data, uint16_t Count);
+  // static void WriteMultiple(uint16_t Color, uint16_t Count);
+  static void WriteMultiple(uint16_t Color, uint32_t Count);
+};
@@ -0,0 +1,80 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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/MarlinConfig.h"
+
+#if ENABLED(TOUCH_BUTTONS_HW_SPI)
+  #include <SPI.h>
+#endif
+
+#ifndef TOUCH_MISO_PIN
+  #define TOUCH_MISO_PIN SD_MISO_PIN
+#endif
+#ifndef TOUCH_MOSI_PIN
+  #define TOUCH_MOSI_PIN SD_MOSI_PIN
+#endif
+#ifndef TOUCH_SCK_PIN
+  #define TOUCH_SCK_PIN  SD_SCK_PIN
+#endif
+#ifndef TOUCH_CS_PIN
+  #define TOUCH_CS_PIN   SD_SS_PIN
+#endif
+#ifndef TOUCH_INT_PIN
+  #define TOUCH_INT_PIN  -1
+#endif
+
+#define XPT2046_DFR_MODE        0x00
+#define XPT2046_SER_MODE        0x04
+#define XPT2046_CONTROL         0x80
+
+enum XPTCoordinate : uint8_t {
+  XPT2046_X  = 0x10 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Y  = 0x50 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Z1 = 0x30 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+};
+
+#if !defined(XPT2046_Z1_THRESHOLD)
+  #define XPT2046_Z1_THRESHOLD 10
+#endif
+
+class XPT2046 {
+private:
+  static bool isBusy() { return false; }
+
+  static uint16_t getRawData(const XPTCoordinate coordinate);
+  static bool isTouched();
+
+  static inline void DataTransferBegin();
+  static inline void DataTransferEnd();
+  #if ENABLED(TOUCH_BUTTONS_HW_SPI)
+    static uint16_t HardwareIO(uint16_t data);
+  #endif
+  static uint16_t SoftwareIO(uint16_t data);
+  static uint16_t IO(uint16_t data = 0);
+
+public:
+  #if ENABLED(TOUCH_BUTTONS_HW_SPI)
+    static SPIClass SPIx;
+  #endif
+
+  static void Init();
+  static bool getRawPoint(int16_t *x, int16_t *y);
+};
@@ -0,0 +1,91 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * 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
+
+/**
+ * HAL timers for Linux X86_64
+ */
+
+#include <stdint.h>
+
+// ------------------------
+// Defines
+// ------------------------
+
+#define FORCE_INLINE __attribute__((always_inline)) inline
+
+typedef uint64_t hal_timer_t;
+#define HAL_TIMER_TYPE_MAX 0xFFFFFFFFFFFFFFFF
+
+#define HAL_TIMER_RATE         ((SystemCoreClock) / 4)  // frequency of timers peripherals
+
+#ifndef STEP_TIMER_NUM
+  #define STEP_TIMER_NUM        0  // Timer Index for Stepper
+#endif
+#ifndef PULSE_TIMER_NUM
+  #define PULSE_TIMER_NUM       STEP_TIMER_NUM
+#endif
+#ifndef TEMP_TIMER_NUM
+  #define TEMP_TIMER_NUM        1  // Timer Index for Temperature
+#endif
+#ifndef SYSTICK_TIMER_NUM
+  #define SYSTICK_TIMER_NUM     2 // Timer Index for Systick
+#endif
+#define SYSTICK_TIMER_FREQUENCY 1000
+
+#define TEMP_TIMER_RATE        1000000
+#define TEMP_TIMER_FREQUENCY   1000 // temperature interrupt frequency
+
+#define STEPPER_TIMER_RATE     HAL_TIMER_RATE   // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
+#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
+#define STEPPER_TIMER_PRESCALE (CYCLES_PER_MICROSECOND / STEPPER_TIMER_TICKS_PER_US)
+
+#define PULSE_TIMER_RATE       STEPPER_TIMER_RATE   // frequency of pulse timer
+#define PULSE_TIMER_PRESCALE   STEPPER_TIMER_PRESCALE
+#define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
+
+#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
+#define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)
+#define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
+
+#define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
+#define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
+
+#ifndef HAL_STEP_TIMER_ISR
+  #define HAL_STEP_TIMER_ISR()  extern "C" void TIMER0_IRQHandler()
+#endif
+#ifndef HAL_TEMP_TIMER_ISR
+  #define HAL_TEMP_TIMER_ISR()  extern "C" void TIMER1_IRQHandler()
+#endif
+
+void HAL_timer_init();
+void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
+
+void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare);
+hal_timer_t HAL_timer_get_compare(const uint8_t timer_num);
+hal_timer_t HAL_timer_get_count(const uint8_t timer_num);
+
+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(TIMER_NUM)
+#define HAL_timer_isr_epilogue(TIMER_NUM)
@@ -0,0 +1,52 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+// adapted from  I2C/master/master.c example
+//   https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
+
+#ifdef __PLAT_NATIVE_SIM__
+
+#include <cstdint>
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+uint8_t u8g_i2c_start(const uint8_t sla) {
+  return 1;
+}
+
+void u8g_i2c_init(const uint8_t clock_option) {
+}
+
+uint8_t u8g_i2c_send_byte(uint8_t data) {
+  return 1;
+}
+
+void u8g_i2c_stop() {
+}
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif // __PLAT_NATIVE_SIM__
@@ -0,0 +1,37 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+void u8g_i2c_init(const uint8_t clock_options);
+//uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
+uint8_t u8g_i2c_start(uint8_t sla);
+uint8_t u8g_i2c_send_byte(uint8_t data);
+void u8g_i2c_stop();
+
+#ifdef __cplusplus
+  }
+#endif
+
@@ -0,0 +1,44 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+void usleep(uint64_t microsec);
+// The following are optional depending on the platform.
+
+// definitions of HAL specific com and device drivers.
+uint8_t u8g_com_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+uint8_t u8g_com_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr);
+
+// connect U8g com generic com names to the desired driver
+#define U8G_COM_SW_SPI u8g_com_sw_spi_fn
+#define U8G_COM_ST7920_SW_SPI u8g_com_ST7920_sw_spi_fn
+
+// let these default for now
+#define U8G_COM_HW_SPI u8g_com_null_fn
+#define U8G_COM_ST7920_HW_SPI u8g_com_null_fn
+#define U8G_COM_SSD_I2C u8g_com_null_fn
+#define U8G_COM_PARALLEL u8g_com_null_fn
+#define U8G_COM_T6963 u8g_com_null_fn
+#define U8G_COM_FAST_PARALLEL u8g_com_null_fn
+#define U8G_COM_UC_I2C u8g_com_null_fn
+
+
@@ -0,0 +1,43 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * LCD delay routines - used by all the drivers.
+ *
+ * These are based on the LPC1768 routines.
+ *
+ * Couldn't just call exact copies because the overhead
+ * results in a one microsecond delay taking about 4µS.
+ */
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+void U8g_delay(int msec);
+void u8g_MicroDelay();
+void u8g_10MicroDelay();
+
+#ifdef __cplusplus
+  }
+#endif
@@ -0,0 +1,52 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Low level pin manipulation routines - used by all the drivers.
+ *
+ * These are based on the LPC1768 pinMode, digitalRead & digitalWrite routines.
+ *
+ * Couldn't just call exact copies because the overhead killed the LCD update speed
+ * With an intermediate level the softspi was running in the 10-20kHz range which
+ * resulted in using about about 25% of the CPU's time.
+ */
+
+#ifdef __PLAT_NATIVE_SIM__
+
+#include "../fastio.h"
+#include "LCD_pin_routines.h"
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+void u8g_SetPinOutput(uint8_t internal_pin_number){SET_DIR_OUTPUT(internal_pin_number);}
+void u8g_SetPinInput(uint8_t internal_pin_number){SET_DIR_INPUT(internal_pin_number);}
+void u8g_SetPinLevel(uint8_t  pin, uint8_t  pin_status){WRITE_PIN(pin, pin_status);}
+uint8_t u8g_GetPinLevel(uint8_t pin){return READ_PIN(pin);}
+void usleep(uint64_t microsec){
+assert(false); // why we here?
+}
+#ifdef __cplusplus
+  }
+#endif
+
+#endif // __PLAT_NATIVE_SIM__
@@ -0,0 +1,46 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Low level pin manipulation routines - used by all the drivers.
+ *
+ * These are based on the LPC1768 pinMode, digitalRead & digitalWrite routines.
+ *
+ * Couldn't just call exact copies because the overhead killed the LCD update speed
+ * With an intermediate level the softspi was running in the 10-20kHz range which
+ * resulted in using about about 25% of the CPU's time.
+ */
+
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+void u8g_SetPinOutput(uint8_t internal_pin_number);
+void u8g_SetPinInput(uint8_t internal_pin_number);
+void u8g_SetPinLevel(uint8_t  pin, uint8_t  pin_status);
+uint8_t u8g_GetPinLevel(uint8_t pin);
+
+#ifdef __cplusplus
+  }
+#endif
@@ -0,0 +1,171 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Based on u8g_com_st7920_hw_spi.c
+ *
+ * Universal 8bit Graphics Library
+ *
+ * Copyright (c) 2011, olikraus@gmail.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice, this list
+ *    of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright notice, this
+ *    list of conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef __PLAT_NATIVE_SIM__
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ENABLED(U8GLIB_ST7920)
+
+#include <U8glib.h>
+#include "../../shared/Delay.h"
+
+#undef SPI_SPEED
+#define SPI_SPEED 6
+#define SPI_DELAY_CYCLES (1 + SPI_SPEED * 10)
+
+static pin_t SCK_pin_ST7920_HAL, MOSI_pin_ST7920_HAL_HAL;
+static uint8_t SPI_speed = 0;
+
+static uint8_t swSpiTransfer(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin) {
+  for (uint8_t i = 0; i < 8; i++) {
+    WRITE_PIN(mosi_pin, !!(b & 0x80));
+    DELAY_CYCLES(SPI_SPEED);
+    WRITE_PIN(sck_pin, HIGH);
+    DELAY_CYCLES(SPI_SPEED);
+    b <<= 1;
+    if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
+    WRITE_PIN(sck_pin, LOW);
+    DELAY_CYCLES(SPI_SPEED);
+  }
+  return b;
+}
+
+static uint8_t swSpiInit(const uint8_t spiRate, const pin_t sck_pin, const pin_t mosi_pin) {
+  WRITE_PIN(mosi_pin, HIGH);
+  WRITE_PIN(sck_pin, LOW);
+  return spiRate;
+}
+
+static void u8g_com_st7920_write_byte_sw_spi(uint8_t rs, uint8_t val) {
+  static uint8_t rs_last_state = 255;
+  if (rs != rs_last_state) {
+    // Transfer Data (FA) or Command (F8)
+    swSpiTransfer(rs ? 0x0FA : 0x0F8, SPI_speed, SCK_pin_ST7920_HAL, -1, MOSI_pin_ST7920_HAL_HAL);
+    rs_last_state = rs;
+    DELAY_US(40); // Give the controller time to process the data: 20 is bad, 30 is OK, 40 is safe
+  }
+  swSpiTransfer(val & 0x0F0, SPI_speed, SCK_pin_ST7920_HAL, -1, MOSI_pin_ST7920_HAL_HAL);
+  swSpiTransfer(val << 4, SPI_speed, SCK_pin_ST7920_HAL, -1, MOSI_pin_ST7920_HAL_HAL);
+}
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+uint8_t u8g_com_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
+  switch (msg) {
+    case U8G_COM_MSG_INIT:
+      SCK_pin_ST7920_HAL = u8g->pin_list[U8G_PI_SCK];
+      MOSI_pin_ST7920_HAL_HAL = u8g->pin_list[U8G_PI_MOSI];
+
+      u8g_SetPIOutput(u8g, U8G_PI_CS);
+      u8g_SetPIOutput(u8g, U8G_PI_SCK);
+      u8g_SetPIOutput(u8g, U8G_PI_MOSI);
+      u8g_Delay(5);
+
+      SPI_speed = swSpiInit(SPI_SPEED, SCK_pin_ST7920_HAL, MOSI_pin_ST7920_HAL_HAL);
+
+      u8g_SetPILevel(u8g, U8G_PI_CS, 0);
+      u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
+      u8g_SetPILevel(u8g, U8G_PI_MOSI, 0);
+
+      u8g->pin_list[U8G_PI_A0_STATE] = 0;       /* initial RS state: command mode */
+      break;
+
+    case U8G_COM_MSG_STOP:
+      break;
+
+    case U8G_COM_MSG_RESET:
+       if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
+      break;
+
+    case U8G_COM_MSG_ADDRESS:                     /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
+      u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
+      break;
+
+    case U8G_COM_MSG_CHIP_SELECT:
+      if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_CS]) u8g_SetPILevel(u8g, U8G_PI_CS, arg_val);  //note: the st7920 has an active high chip select
+      break;
+
+    case U8G_COM_MSG_WRITE_BYTE:
+      u8g_com_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], arg_val);
+      break;
+
+    case U8G_COM_MSG_WRITE_SEQ: {
+        uint8_t *ptr = (uint8_t*) arg_ptr;
+        while (arg_val > 0) {
+          u8g_com_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
+          arg_val--;
+        }
+      }
+      break;
+
+      case U8G_COM_MSG_WRITE_SEQ_P: {
+        uint8_t *ptr = (uint8_t*) arg_ptr;
+        while (arg_val > 0) {
+          u8g_com_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
+          arg_val--;
+        }
+      }
+      break;
+  }
+  return 1;
+}
+#ifdef __cplusplus
+  }
+#endif
+
+#endif // U8GLIB_ST7920
+#endif // TARGET_LPC1768
@@ -0,0 +1,215 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Based on u8g_com_std_sw_spi.c
+ *
+ * Universal 8bit Graphics Library
+ *
+ * Copyright (c) 2015, olikraus@gmail.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice, this list
+ *    of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright notice, this
+ *    list of conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef __PLAT_NATIVE_SIM__
+
+#include "../../../inc/MarlinConfig.h"
+
+#if HAS_MARLINUI_U8GLIB && DISABLED(U8GLIB_ST7920)
+
+#undef SPI_SPEED
+#define SPI_SPEED 2  // About 2 MHz
+
+#include <Arduino.h>
+#include <U8glib.h>
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
+  LOOP_L_N(i, 8) {
+    if (spi_speed == 0) {
+      WRITE_PIN(mosi_pin, !!(b & 0x80));
+      WRITE_PIN(sck_pin, HIGH);
+      b <<= 1;
+      if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
+      WRITE_PIN(sck_pin, LOW);
+    }
+    else {
+      const uint8_t state = (b & 0x80) ? HIGH : LOW;
+      LOOP_L_N(j, spi_speed)
+        WRITE_PIN(mosi_pin, state);
+
+      LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
+        WRITE_PIN(sck_pin, HIGH);
+
+      b <<= 1;
+      if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
+
+      LOOP_L_N(j, spi_speed)
+        WRITE_PIN(sck_pin, LOW);
+    }
+  }
+
+  return b;
+}
+
+uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
+
+  LOOP_L_N(i, 8) {
+    const uint8_t state = (b & 0x80) ? HIGH : LOW;
+    if (spi_speed == 0) {
+      WRITE_PIN(sck_pin, LOW);
+      WRITE_PIN(mosi_pin, state);
+      WRITE_PIN(mosi_pin, state);  // need some setup time
+      WRITE_PIN(sck_pin, HIGH);
+    }
+    else {
+      LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
+        WRITE_PIN(sck_pin, LOW);
+
+      LOOP_L_N(j, spi_speed)
+        WRITE_PIN(mosi_pin, state);
+
+      LOOP_L_N(j, spi_speed)
+        WRITE_PIN(sck_pin, HIGH);
+    }
+    b <<= 1;
+    if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
+  }
+
+  return b;
+}
+
+static uint8_t SPI_speed = 0;
+
+static uint8_t swSpiInit(const uint8_t spi_speed, const uint8_t clk_pin, const uint8_t mosi_pin) {
+    return spi_speed;
+}
+
+static void u8g_sw_spi_shift_out(uint8_t dataPin, uint8_t clockPin, uint8_t val) {
+  #if EITHER(FYSETC_MINI_12864, MKS_MINI_12864)
+    swSpiTransfer_mode_3(val, SPI_speed, clockPin, -1, dataPin);
+  #else
+    swSpiTransfer_mode_0(val, SPI_speed, clockPin, -1, dataPin);
+  #endif
+}
+
+uint8_t u8g_com_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
+  switch (msg) {
+    case U8G_COM_MSG_INIT:
+      u8g_SetPIOutput(u8g, U8G_PI_SCK);
+      u8g_SetPIOutput(u8g, U8G_PI_MOSI);
+      u8g_SetPIOutput(u8g, U8G_PI_CS);
+      u8g_SetPIOutput(u8g, U8G_PI_A0);
+      if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPIOutput(u8g, U8G_PI_RESET);
+      SPI_speed = swSpiInit(SPI_SPEED, u8g->pin_list[U8G_PI_SCK], u8g->pin_list[U8G_PI_MOSI]);
+      u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
+      u8g_SetPILevel(u8g, U8G_PI_MOSI, 0);
+      break;
+
+    case U8G_COM_MSG_STOP:
+      break;
+
+    case U8G_COM_MSG_RESET:
+      if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
+      break;
+
+    case U8G_COM_MSG_CHIP_SELECT:
+      #if EITHER(FYSETC_MINI_12864, MKS_MINI_12864)  // 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
+          u8g_SetPILevel(u8g, U8G_PI_SCK, 1);        // Set SCK to mode 3 idle state before CS goes active
+          u8g_SetPILevel(u8g, U8G_PI_CS, LOW);
+        }
+        else {
+          u8g_SetPILevel(u8g, U8G_PI_CS, HIGH);
+          u8g_SetPILevel(u8g, U8G_PI_SCK, 0);  // Set SCK to mode 0 idle state after CS goes inactive
+        }
+      #else
+        u8g_SetPILevel(u8g, U8G_PI_CS, !arg_val);
+      #endif
+      break;
+
+    case U8G_COM_MSG_WRITE_BYTE:
+      u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], 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(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *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->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], u8g_pgm_read(ptr));
+          ptr++;
+          arg_val--;
+        }
+      }
+      break;
+
+    case U8G_COM_MSG_ADDRESS:                     /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
+      u8g_SetPILevel(u8g, U8G_PI_A0, arg_val);
+      break;
+  }
+  return 1;
+}
+
+#ifdef __cplusplus
+  }
+#endif
+
+#elif !ANY(TFT_COLOR_UI, TFT_CLASSIC_UI, TFT_LVGL_UI, HAS_MARLINUI_HD44780) && HAS_MARLINUI_U8GLIB
+  #include <U8glib.h>
+  uint8_t u8g_com_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {return 0;}
+#endif // HAS_MARLINUI_U8GLIB && !U8GLIB_ST7920
+#endif // __PLAT_NATIVE_SIM__
@@ -0,0 +1,27 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#define WDT_TIMEOUT   4000000 // 4 second timeout
+
+void watchdog_init();
+void HAL_watchdog_refresh();
@@ -47,80 +47,38 @@

 #include "../../module/endstops.h"

-#define MATCH_EILINE(P1,P2)     (P1 != P2 && PIN_TO_EILINE(P1) == PIN_TO_EILINE(P2))
-#if HAS_X_MAX
-  #define MATCH_X_MAX_EILINE(P) MATCH_EILINE(P, X_MAX_PIN)
-#else
-  #define MATCH_X_MAX_EILINE(P) false
-#endif
-#if HAS_X_MIN
-  #define MATCH_X_MIN_EILINE(P) MATCH_EILINE(P, X_MIN_PIN)
-#else
-  #define MATCH_X_MIN_EILINE(P) false
-#endif
-#if HAS_Y_MAX
-   #define MATCH_Y_MAX_EILINE(P) MATCH_EILINE(P, Y_MAX_PIN)
-#else
-   #define MATCH_Y_MAX_EILINE(P) false
-#endif
-#if HAS_Y_MIN
-  #define MATCH_Y_MIN_EILINE(P) MATCH_EILINE(P, Y_MIN_PIN)
-#else
-  #define MATCH_Y_MIN_EILINE(P) false
-#endif
-#if HAS_Z_MAX
-   #define MATCH_Z_MAX_EILINE(P) MATCH_EILINE(P, Z_MAX_PIN)
-#else
-  #define MATCH_Z_MAX_EILINE(P) false
-#endif
-#if HAS_Z_MIN
-  #define MATCH_Z_MIN_EILINE(P) MATCH_EILINE(P, Z_MIN_PIN)
-#else
-  #define MATCH_Z_MIN_EILINE(P) false
-#endif
-#if HAS_Z2_MAX
-  #define MATCH_Z2_MAX_EILINE(P) MATCH_EILINE(P, Z2_MAX_PIN)
-#else
-  #define MATCH_Z2_MAX_EILINE(P) false
-#endif
-#if HAS_Z2_MIN
-  #define MATCH_Z2_MIN_EILINE(P) MATCH_EILINE(P, Z2_MIN_PIN)
-#else
-  #define MATCH_Z2_MIN_EILINE(P) false
-#endif
-#if HAS_Z3_MAX
-  #define MATCH_Z3_MAX_EILINE(P) MATCH_EILINE(P, Z3_MAX_PIN)
-#else
-  #define MATCH_Z3_MAX_EILINE(P) false
-#endif
-#if HAS_Z3_MIN
-  #define MATCH_Z3_MIN_EILINE(P) MATCH_EILINE(P, Z3_MIN_PIN)
-#else
-  #define MATCH_Z3_MIN_EILINE(P) false
-#endif
-#if HAS_Z4_MAX
-  #define MATCH_Z4_MAX_EILINE(P) MATCH_EILINE(P, Z4_MAX_PIN)
-#else
-  #define MATCH_Z4_MAX_EILINE(P) false
-#endif
-#if HAS_Z4_MIN
-  #define MATCH_Z4_MIN_EILINE(P) MATCH_EILINE(P, Z4_MIN_PIN)
-#else
-  #define MATCH_Z4_MIN_EILINE(P) false
-#endif
-#if HAS_Z_MIN_PROBE_PIN
-  #define MATCH_Z_MIN_PROBE_EILINE(P)   MATCH_EILINE(P, Z_MIN_PROBE_PIN)
-#else
-  #define MATCH_Z_MIN_PROBE_EILINE(P) false
-#endif
-#define AVAILABLE_EILINE(P)     (PIN_TO_EILINE(P) != -1                                 \
-                                 && !MATCH_X_MAX_EILINE(P) && !MATCH_X_MIN_EILINE(P)    \
-                                 && !MATCH_Y_MAX_EILINE(P) && !MATCH_Y_MIN_EILINE(P)    \
-                                 && !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P)    \
-                                 && !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P)  \
-                                 && !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P)  \
-                                 && !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P)  \
-                                 && !MATCH_Z_MIN_PROBE_EILINE(P))
+#define MATCH_EILINE(P1,P2) (P1 != P2 && PIN_TO_EILINE(P1) == PIN_TO_EILINE(P2))
+#define MATCH_X_MAX_EILINE(P)   TERN0(HAS_X_MAX,  DEFER4(MATCH_EILINE)(P, X_MAX_PIN))
+#define MATCH_X_MIN_EILINE(P)   TERN0(HAS_X_MIN,  DEFER4(MATCH_EILINE)(P, X_MIN_PIN))
+#define MATCH_Y_MAX_EILINE(P)   TERN0(HAS_Y_MAX,  DEFER4(MATCH_EILINE)(P, Y_MAX_PIN))
+#define MATCH_Y_MIN_EILINE(P)   TERN0(HAS_Y_MIN,  DEFER4(MATCH_EILINE)(P, Y_MIN_PIN))
+#define MATCH_Z_MAX_EILINE(P)   TERN0(HAS_Z_MAX,  DEFER4(MATCH_EILINE)(P, Z_MAX_PIN))
+#define MATCH_Z_MIN_EILINE(P)   TERN0(HAS_Z_MIN,  DEFER4(MATCH_EILINE)(P, Z_MIN_PIN))
+#define MATCH_I_MAX_EILINE(P)   TERN0(HAS_I_MAX,  DEFER4(MATCH_EILINE)(P, I_MAX_PIN))
+#define MATCH_I_MIN_EILINE(P)   TERN0(HAS_I_MIN,  DEFER4(MATCH_EILINE)(P, I_MIN_PIN))
+#define MATCH_J_MAX_EILINE(P)   TERN0(HAS_J_MAX,  DEFER4(MATCH_EILINE)(P, J_MAX_PIN))
+#define MATCH_J_MIN_EILINE(P)   TERN0(HAS_J_MIN,  DEFER4(MATCH_EILINE)(P, J_MIN_PIN))
+#define MATCH_K_MAX_EILINE(P)   TERN0(HAS_K_MAX,  DEFER4(MATCH_EILINE)(P, K_MAX_PIN))
+#define MATCH_K_MIN_EILINE(P)   TERN0(HAS_K_MIN,  DEFER4(MATCH_EILINE)(P, K_MIN_PIN))
+#define MATCH_Z2_MAX_EILINE(P)  TERN0(HAS_Z2_MAX, DEFER4(MATCH_EILINE)(P, Z2_MAX_PIN))
+#define MATCH_Z2_MIN_EILINE(P)  TERN0(HAS_Z2_MIN, DEFER4(MATCH_EILINE)(P, Z2_MIN_PIN))
+#define MATCH_Z3_MAX_EILINE(P)  TERN0(HAS_Z3_MAX, DEFER4(MATCH_EILINE)(P, Z3_MAX_PIN))
+#define MATCH_Z3_MIN_EILINE(P)  TERN0(HAS_Z3_MIN, DEFER4(MATCH_EILINE)(P, Z3_MIN_PIN))
+#define MATCH_Z4_MAX_EILINE(P)  TERN0(HAS_Z4_MAX, DEFER4(MATCH_EILINE)(P, Z4_MAX_PIN))
+#define MATCH_Z4_MIN_EILINE(P)  TERN0(HAS_Z4_MIN, DEFER4(MATCH_EILINE)(P, Z4_MIN_PIN))
+#define MATCH_Z_MIN_PROBE_EILINE(P) TERN0(HAS_Z_MIN_PROBE_PIN, DEFER4(MATCH_EILINE)(P, Z_MIN_PROBE_PIN))
+
+#define AVAILABLE_EILINE(P) ( PIN_TO_EILINE(P) != -1    \
+  && !MATCH_X_MAX_EILINE(P) && !MATCH_X_MIN_EILINE(P)   \
+  && !MATCH_Y_MAX_EILINE(P) && !MATCH_Y_MIN_EILINE(P)   \
+  && !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P)   \
+  && !MATCH_I_MAX_EILINE(P) && !MATCH_I_MIN_EILINE(P)   \
+  && !MATCH_J_MAX_EILINE(P) && !MATCH_J_MIN_EILINE(P)   \
+  && !MATCH_K_MAX_EILINE(P) && !MATCH_K_MIN_EILINE(P)   \
+  && !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P) \
+  && !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P) \
+  && !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P) \
+  && !MATCH_Z_MIN_PROBE_EILINE(P) )

 // One ISR for all EXT-Interrupts
 void endstop_ISR() { endstops.update(); }
@@ -204,5 +162,37 @@ void setup_endstop_interrupts() {
      #error "Z_MIN_PROBE_PIN has no EXTINT line available."
    #endif
    _ATTACH(Z_MIN_PROBE_PIN);
+  #elif HAS_I_MAX
+    #if !AVAILABLE_EILINE(I_MAX_PIN)
+      #error "I_MAX_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(I_MAX_PIN, endstop_ISR, CHANGE);
+  #elif HAS_I_MIN
+    #if !AVAILABLE_EILINE(I_MIN_PIN)
+      #error "I_MIN_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(I_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_J_MAX
+    #if !AVAILABLE_EILINE(J_MAX_PIN)
+      #error "J_MAX_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(J_MAX_PIN, endstop_ISR, CHANGE);
+  #elif HAS_J_MIN
+    #if !AVAILABLE_EILINE(J_MIN_PIN)
+      #error "J_MIN_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(J_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_K_MAX
+    #if !AVAILABLE_EILINE(K_MAX_PIN)
+      #error "K_MAX_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(K_MAX_PIN, endstop_ISR, CHANGE);
+  #elif HAS_K_MIN
+    #if !AVAILABLE_EILINE(K_MIN_PIN)
+      #error "K_MIN_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(K_MIN_PIN, endstop_ISR, CHANGE);
  #endif
 }
@@ -31,7 +31,8 @@
  #error "No custom SD drive cable defined for this board."
 #endif

-#if defined(MAX6675_SCK_PIN) && defined(MAX6675_DO_PIN) && (MAX6675_SCK_PIN == SCK1 || MAX6675_DO_PIN == MISO1)
+#if (defined(TEMP_0_SCK_PIN) && defined(TEMP_0_MISO_PIN) && (TEMP_0_SCK_PIN == SCK1 || TEMP_0_MISO_PIN == MISO1)) || \
+    (defined(TEMP_1_SCK_PIN) && defined(TEMP_1_MISO_PIN) && (TEMP_1_SCK_PIN == SCK1 || TEMP_1_MISO_PIN == MISO1))
  #error "OnBoard SPI BUS can't be shared with other devices."
 #endif

@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "HAL.h"
 #include "usb_serial.h"
@@ -91,15 +91,13 @@ void HAL_init() {
    USB_Hook_init();
  #endif

-  TERN_(POSTMORTEM_DEBUGGING, install_min_serial()); // Install the min serial handler
+  TERN_(POSTMORTEM_DEBUGGING, install_min_serial());    // Install the min serial handler

-  #if HAS_SD_HOST_DRIVE
-    MSC_SD_init();                         // Enable USB SD card access
-  #endif
+  TERN_(HAS_SD_HOST_DRIVE, MSC_SD_init());              // Enable USB SD card access

  #if PIN_EXISTS(USB_CONNECT)
-    OUT_WRITE(USB_CONNECT_PIN, !USB_CONNECT_INVERTING);  // USB clear connection
-    delay(1000);                                         // Give OS time to notice
+    OUT_WRITE(USB_CONNECT_PIN, !USB_CONNECT_INVERTING); // USB clear connection
+    delay(1000);                                        // Give OS time to notice
    WRITE(USB_CONNECT_PIN, USB_CONNECT_INVERTING);
  #endif
 }
@@ -167,4 +165,4 @@ void HAL_SYSTICK_Callback() {
  if (systick_user_callback) systick_user_callback();
 }

-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -195,6 +195,7 @@ uint16_t HAL_adc_get_result();
 #ifdef STM32F1xx
  #define JTAG_DISABLE() AFIO_DBGAFR_CONFIG(AFIO_MAPR_SWJ_CFG_JTAGDISABLE)
  #define JTAGSWD_DISABLE() AFIO_DBGAFR_CONFIG(AFIO_MAPR_SWJ_CFG_DISABLE)
+  #define JTAGSWD_RESET() AFIO_DBGAFR_CONFIG(AFIO_MAPR_SWJ_CFG_RESET); // Reset: FULL SWD+JTAG
 #endif

 #define PLATFORM_M997_SUPPORT
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfigPre.h"

@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -163,11 +163,9 @@ static SPISettings spiConfig;
    }
    spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);

-    #if ENABLED(CUSTOM_SPI_PINS)
-      SPI.setMISO(SD_MISO_PIN);
-      SPI.setMOSI(SD_MOSI_PIN);
-      SPI.setSCLK(SD_SCK_PIN);
-    #endif
+    SPI.setMISO(SD_MISO_PIN);
+    SPI.setMOSI(SD_MOSI_PIN);
+    SPI.setSCLK(SD_SCK_PIN);

    SPI.begin();
  }
@@ -226,4 +224,4 @@ static SPISettings spiConfig;

 #endif // SOFTWARE_SPI

-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(STM32H7xx)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1) && !defined(STM32H7xx)

 #include "MarlinSPI.h"

@@ -165,4 +165,4 @@ uint8_t MarlinSPI::dmaSend(const void * transmitBuf, uint16_t length, bool minc)
  return 1;
 }

-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1 && !STM32H7xx
@@ -16,7 +16,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"
 #include "MarlinSerial.h"
@@ -101,4 +101,4 @@ void MarlinSerial::_rx_complete_irq(serial_t *obj) {
  }
 }

-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -28,319 +28,296 @@
 #include <stdint.h>
 #include <stdbool.h>

-#if NONE(STM32F103xE, STM32F103xG, STM32F4xx, STM32F7xx)
-  #error "ERROR - Only STM32F103xE, STM32F103xG, STM32F4xx or STM32F7xx CPUs supported"
+// use local drivers
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  #include <stm32f1xx_hal_rcc_ex.h>
+  #include <stm32f1xx_hal_sd.h>
+#elif defined(STM32F4xx)
+  #include <stm32f4xx_hal_rcc.h>
+  #include <stm32f4xx_hal_dma.h>
+  #include <stm32f4xx_hal_gpio.h>
+  #include <stm32f4xx_hal_sd.h>
+#elif defined(STM32F7xx)
+  #include <stm32f7xx_hal_rcc.h>
+  #include <stm32f7xx_hal_dma.h>
+  #include <stm32f7xx_hal_gpio.h>
+  #include <stm32f7xx_hal_sd.h>
+#else
+  #error "SDIO only supported with STM32F103xE, STM32F103xG, STM32F4xx, or STM32F7xx."
 #endif

-#if HAS_SD_HOST_DRIVE
+// Fixed
+#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

-  // use USB drivers
+SD_HandleTypeDef hsd;  // create SDIO structure
+// F4 supports one DMA for RX and another for TX, but Marlin will never
+// do read and write at same time, so we use the same DMA for both.
+DMA_HandleTypeDef hdma_sdio;

-  extern "C" {
-    int8_t SD_MSC_Read(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
-    int8_t SD_MSC_Write(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
-    extern SD_HandleTypeDef hsd;
-  }
+/*
+  SDIO_INIT_CLK_DIV is 118
+  SDIO clock frequency is 48MHz / (TRANSFER_CLOCK_DIV + 2)
+  SDIO init clock frequency should not exceed 400KHz = 48MHz / (118 + 2)

-  bool SDIO_Init() {
-    return hsd.State == HAL_SD_STATE_READY;  // return pass/fail status
-  }
+  Default TRANSFER_CLOCK_DIV is 2 (118 / 40)
+  Default SDIO clock frequency is 48MHz / (2 + 2) = 12 MHz
+  This might be too fast for stable SDIO operations

-  bool SDIO_ReadBlock(uint32_t block, uint8_t *src) {
-    int8_t status = SD_MSC_Read(0, (uint8_t*)src, block, 1); // read one 512 byte block
-    return (bool) status;
-  }
+  MKS Robin board seems to have stable SDIO with BusWide 1bit and ClockDiv 8 i.e. 4.8MHz SDIO clock frequency
+  Additional testing is required as there are clearly some 4bit initialization problems
+*/

-  bool SDIO_WriteBlock(uint32_t block, const uint8_t *src) {
-    int8_t status = SD_MSC_Write(0, (uint8_t*)src, block, 1); // write one 512 byte block
-    return (bool) status;
-  }
+#ifndef USBD_OK
+  #define USBD_OK 0
+#endif

-#else // !USBD_USE_CDC_COMPOSITE
+// Target Clock, configurable. Default is 18MHz, from STM32F1
+#ifndef SDIO_CLOCK
+  #define SDIO_CLOCK 18000000 // 18 MHz
+#endif

-  // use local drivers
-  #if defined(STM32F103xE) || defined(STM32F103xG)
-    #include <stm32f1xx_hal_rcc_ex.h>
-    #include <stm32f1xx_hal_sd.h>
-  #elif defined(STM32F4xx)
-    #include <stm32f4xx_hal_rcc.h>
-    #include <stm32f4xx_hal_dma.h>
-    #include <stm32f4xx_hal_gpio.h>
-    #include <stm32f4xx_hal_sd.h>
-  #elif defined(STM32F7xx)
-    #include <stm32f7xx_hal_rcc.h>
-    #include <stm32f7xx_hal_dma.h>
-    #include <stm32f7xx_hal_gpio.h>
-    #include <stm32f7xx_hal_sd.h>
-  #else
-    #error "ERROR - Only STM32F103xE, STM32F103xG, STM32F4xx or STM32F7xx CPUs supported"
+// SDIO retries, configurable. Default is 3, from STM32F1
+#ifndef SDIO_READ_RETRIES
+  #define SDIO_READ_RETRIES 3
+#endif
+
+// SDIO Max Clock (naming from STM Manual, don't change)
+#define SDIOCLK 48000000
+
+static uint32_t clock_to_divider(uint32_t clk) {
+  // limit the SDIO master clock to 8/3 of PCLK2. See STM32 Manuals
+  // Also limited to no more than 48Mhz (SDIOCLK).
+  const uint32_t pclk2 = HAL_RCC_GetPCLK2Freq();
+  clk = min(clk, (uint32_t)(pclk2 * 8 / 3));
+  clk = min(clk, (uint32_t)SDIOCLK);
+  // Round up divider, so we don't run the card over the speed supported,
+  // and subtract by 2, because STM32 will add 2, as written in the manual:
+  // SDIO_CK frequency = SDIOCLK / [CLKDIV + 2]
+  return pclk2 / clk + (pclk2 % clk != 0) - 2;
+}
+
+void go_to_transfer_speed() {
+  /* Default SDIO peripheral configuration for SD card initialization */
+  hsd.Init.ClockEdge           = hsd.Init.ClockEdge;
+  hsd.Init.ClockBypass         = hsd.Init.ClockBypass;
+  hsd.Init.ClockPowerSave      = hsd.Init.ClockPowerSave;
+  hsd.Init.BusWide             = hsd.Init.BusWide;
+  hsd.Init.HardwareFlowControl = hsd.Init.HardwareFlowControl;
+  hsd.Init.ClockDiv            = clock_to_divider(SDIO_CLOCK);
+
+  /* Initialize SDIO peripheral interface with default configuration */
+  SDIO_Init(hsd.Instance, hsd.Init);
+}
+
+void SD_LowLevel_Init(void) {
+  uint32_t tempreg;
+
+  __HAL_RCC_GPIOC_CLK_ENABLE(); //enable GPIO clocks
+  __HAL_RCC_GPIOD_CLK_ENABLE(); //enable GPIO clocks
+
+  GPIO_InitTypeDef  GPIO_InitStruct;
+
+  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+  GPIO_InitStruct.Pull = 1;  //GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+
+  #if DISABLED(STM32F1xx)
+    GPIO_InitStruct.Alternate = GPIO_AF12_SDIO;
  #endif

-  // Fixed
-  #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
+  GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_12;  // D0 & SCK
+  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

-  SD_HandleTypeDef hsd;  // create SDIO structure
-  // F4 supports one DMA for RX and another for TX, but Marlin will never
-  // do read and write at same time, so we use the same DMA for both.
-  DMA_HandleTypeDef hdma_sdio;
-
-  /*
-    SDIO_INIT_CLK_DIV is 118
-    SDIO clock frequency is 48MHz / (TRANSFER_CLOCK_DIV + 2)
-    SDIO init clock frequency should not exceed 400KHz = 48MHz / (118 + 2)
-
-    Default TRANSFER_CLOCK_DIV is 2 (118 / 40)
-    Default SDIO clock frequency is 48MHz / (2 + 2) = 12 MHz
-    This might be too fast for stable SDIO operations
-
-    MKS Robin board seems to have stable SDIO with BusWide 1bit and ClockDiv 8 i.e. 4.8MHz SDIO clock frequency
-    Additional testing is required as there are clearly some 4bit initialization problems
-  */
-
-  #ifndef USBD_OK
-    #define USBD_OK 0
-  #endif
-
-  // Target Clock, configurable. Default is 18MHz, from STM32F1
-  #ifndef SDIO_CLOCK
-    #define SDIO_CLOCK 18000000 // 18 MHz
-  #endif
-
-  // SDIO retries, configurable. Default is 3, from STM32F1
-  #ifndef SDIO_READ_RETRIES
-    #define SDIO_READ_RETRIES 3
-  #endif
-
-  // SDIO Max Clock (naming from STM Manual, don't change)
-  #define SDIOCLK 48000000
-
-  static uint32_t clock_to_divider(uint32_t clk) {
-    // limit the SDIO master clock to 8/3 of PCLK2. See STM32 Manuals
-    // Also limited to no more than 48Mhz (SDIOCLK).
-    const uint32_t pclk2 = HAL_RCC_GetPCLK2Freq();
-    clk = min(clk, (uint32_t)(pclk2 * 8 / 3));
-    clk = min(clk, (uint32_t)SDIOCLK);
-    // Round up divider, so we don't run the card over the speed supported,
-    // and subtract by 2, because STM32 will add 2, as written in the manual:
-    // SDIO_CK frequency = SDIOCLK / [CLKDIV + 2]
-    return pclk2 / clk + (pclk2 % clk != 0) - 2;
-  }
-
-  void go_to_transfer_speed() {
-    /* Default SDIO peripheral configuration for SD card initialization */
-    hsd.Init.ClockEdge           = hsd.Init.ClockEdge;
-    hsd.Init.ClockBypass         = hsd.Init.ClockBypass;
-    hsd.Init.ClockPowerSave      = hsd.Init.ClockPowerSave;
-    hsd.Init.BusWide             = hsd.Init.BusWide;
-    hsd.Init.HardwareFlowControl = hsd.Init.HardwareFlowControl;
-    hsd.Init.ClockDiv            = clock_to_divider(SDIO_CLOCK);
-
-    /* Initialize SDIO peripheral interface with default configuration */
-    SDIO_Init(hsd.Instance, hsd.Init);
-  }
-
-  void SD_LowLevel_Init(void) {
-    uint32_t tempreg;
-
-    __HAL_RCC_GPIOC_CLK_ENABLE(); //enable GPIO clocks
-    __HAL_RCC_GPIOD_CLK_ENABLE(); //enable GPIO clocks
-
-    GPIO_InitTypeDef  GPIO_InitStruct;
-
-    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-    GPIO_InitStruct.Pull = 1;  //GPIO_NOPULL;
-    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
-
-    #if DISABLED(STM32F1xx)
-      GPIO_InitStruct.Alternate = GPIO_AF12_SDIO;
-    #endif
-
-    GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_12;  // D0 & SCK
+  #if PINS_EXIST(SDIO_D1, SDIO_D2, SDIO_D3)  // define D1-D3 only if have a four bit wide SDIO bus
+    GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11;  // D1-D3
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+  #endif

-    #if PINS_EXIST(SDIO_D1, SDIO_D2, SDIO_D3)  // define D1-D3 only if have a four bit wide SDIO bus
-      GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11;  // D1-D3
-      HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
-    #endif
+  // Configure PD.02 CMD line
+  GPIO_InitStruct.Pin = GPIO_PIN_2;
+  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

-    // Configure PD.02 CMD line
-    GPIO_InitStruct.Pin = GPIO_PIN_2;
-    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
+  // Setup DMA
+  #if defined(STM32F1xx)
+    hdma_sdio.Init.Mode = DMA_NORMAL;
+    hdma_sdio.Instance = DMA2_Channel4;
+    HAL_NVIC_EnableIRQ(DMA2_Channel4_5_IRQn);
+  #elif defined(STM32F4xx)
+    hdma_sdio.Init.Mode = DMA_PFCTRL;
+    hdma_sdio.Instance = DMA2_Stream3;
+    hdma_sdio.Init.Channel = DMA_CHANNEL_4;
+    hdma_sdio.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
+    hdma_sdio.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
+    hdma_sdio.Init.MemBurst = DMA_MBURST_INC4;
+    hdma_sdio.Init.PeriphBurst = DMA_PBURST_INC4;
+    HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
+  #endif
+  HAL_NVIC_EnableIRQ(SDIO_IRQn);
+  hdma_sdio.Init.PeriphInc = DMA_PINC_DISABLE;
+  hdma_sdio.Init.MemInc = DMA_MINC_ENABLE;
+  hdma_sdio.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
+  hdma_sdio.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
+  hdma_sdio.Init.Priority = DMA_PRIORITY_LOW;
+  __HAL_LINKDMA(&hsd, hdmarx, hdma_sdio);
+  __HAL_LINKDMA(&hsd, hdmatx, hdma_sdio);

-    // Setup DMA
-    #if defined(STM32F1xx)
-      hdma_sdio.Init.Mode = DMA_NORMAL;
-      hdma_sdio.Instance = DMA2_Channel4;
-      HAL_NVIC_EnableIRQ(DMA2_Channel4_5_IRQn);
-    #elif defined(STM32F4xx)
-      hdma_sdio.Init.Mode = DMA_PFCTRL;
-      hdma_sdio.Instance = DMA2_Stream3;
-      hdma_sdio.Init.Channel = DMA_CHANNEL_4;
-      hdma_sdio.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
-      hdma_sdio.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
-      hdma_sdio.Init.MemBurst = DMA_MBURST_INC4;
-      hdma_sdio.Init.PeriphBurst = DMA_PBURST_INC4;
-      HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
-    #endif
-    HAL_NVIC_EnableIRQ(SDIO_IRQn);
-    hdma_sdio.Init.PeriphInc = DMA_PINC_DISABLE;
-    hdma_sdio.Init.MemInc = DMA_MINC_ENABLE;
-    hdma_sdio.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
-    hdma_sdio.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
-    hdma_sdio.Init.Priority = DMA_PRIORITY_LOW;
-    __HAL_LINKDMA(&hsd, hdmarx, hdma_sdio);
-    __HAL_LINKDMA(&hsd, hdmatx, hdma_sdio);
+  #if defined(STM32F1xx)
+    __HAL_RCC_SDIO_CLK_ENABLE();
+    __HAL_RCC_DMA2_CLK_ENABLE();
+  #else
+    __HAL_RCC_SDIO_FORCE_RESET();
+    delay(2);
+    __HAL_RCC_SDIO_RELEASE_RESET();
+    delay(2);
+    __HAL_RCC_SDIO_CLK_ENABLE();

-    #if defined(STM32F1xx)
-      __HAL_RCC_SDIO_CLK_ENABLE();
-      __HAL_RCC_DMA2_CLK_ENABLE();
-    #else
-      __HAL_RCC_SDIO_FORCE_RESET();
-      delay(2);
-      __HAL_RCC_SDIO_RELEASE_RESET();
-      delay(2);
-      __HAL_RCC_SDIO_CLK_ENABLE();
+    __HAL_RCC_DMA2_FORCE_RESET();
+    delay(2);
+    __HAL_RCC_DMA2_RELEASE_RESET();
+    delay(2);
+    __HAL_RCC_DMA2_CLK_ENABLE();
+  #endif

-      __HAL_RCC_DMA2_FORCE_RESET();
-      delay(2);
-      __HAL_RCC_DMA2_RELEASE_RESET();
-      delay(2);
-      __HAL_RCC_DMA2_CLK_ENABLE();
-    #endif
+  //Initialize the SDIO (with initial <400Khz Clock)
+  tempreg = 0;  //Reset value
+  tempreg |= SDIO_CLKCR_CLKEN;  // Clock enabled
+  tempreg |= SDIO_INIT_CLK_DIV; // Clock Divider. Clock = 48000 / (118 + 2) = 400Khz
+  // Keep the rest at 0 => HW_Flow Disabled, Rising Clock Edge, Disable CLK ByPass, Bus Width = 0, Power save Disable
+  SDIO->CLKCR = tempreg;

-    //Initialize the SDIO (with initial <400Khz Clock)
-    tempreg = 0;  //Reset value
-    tempreg |= SDIO_CLKCR_CLKEN;  // Clock enabled
-    tempreg |= SDIO_INIT_CLK_DIV; // Clock Divider. Clock = 48000 / (118 + 2) = 400Khz
-    // Keep the rest at 0 => HW_Flow Disabled, Rising Clock Edge, Disable CLK ByPass, Bus Width = 0, Power save Disable
-    SDIO->CLKCR = tempreg;
+  // Power up the SDIO
+  SDIO_PowerState_ON(SDIO);
+  hsd.Instance = SDIO;
+}

-    // Power up the SDIO
-    SDIO_PowerState_ON(SDIO);
-    hsd.Instance = SDIO;
+void HAL_SD_MspInit(SD_HandleTypeDef *hsd) { // application specific init
+  UNUSED(hsd);   // Prevent unused argument(s) compilation warning
+  __HAL_RCC_SDIO_CLK_ENABLE();  // turn on SDIO clock
+}
+
+bool SDIO_Init() {
+  uint8_t retryCnt = SDIO_READ_RETRIES;
+
+  bool status;
+  hsd.Instance = SDIO;
+  hsd.State = HAL_SD_STATE_RESET;
+
+  SD_LowLevel_Init();
+
+  uint8_t retry_Cnt = retryCnt;
+  for (;;) {
+    TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
+    status = (bool) HAL_SD_Init(&hsd);
+    if (!status) break;
+    if (!--retry_Cnt) return false;   // return failing status if retries are exhausted
  }

-  void HAL_SD_MspInit(SD_HandleTypeDef *hsd) { // application specific init
-    UNUSED(hsd);   // Prevent unused argument(s) compilation warning
-    __HAL_RCC_SDIO_CLK_ENABLE();  // turn on SDIO clock
-  }
+  go_to_transfer_speed();

-  bool SDIO_Init() {
-    uint8_t retryCnt = SDIO_READ_RETRIES;
-
-    bool status;
-    hsd.Instance = SDIO;
-    hsd.State = HAL_SD_STATE_RESET;
-
-    SD_LowLevel_Init();
-
-    uint8_t retry_Cnt = retryCnt;
+  #if PINS_EXIST(SDIO_D1, SDIO_D2, SDIO_D3) // go to 4 bit wide mode if pins are defined
+    retry_Cnt = retryCnt;
    for (;;) {
      TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
-      status = (bool) HAL_SD_Init(&hsd);
-      if (!status) break;
-      if (!--retry_Cnt) return false;   // return failing status if retries are exhausted
+      if (!HAL_SD_ConfigWideBusOperation(&hsd, SDIO_BUS_WIDE_4B)) break;  // some cards are only 1 bit wide so a pass here is not required
+      if (!--retry_Cnt) break;
    }
-
-    go_to_transfer_speed();
-
-    #if PINS_EXIST(SDIO_D1, SDIO_D2, SDIO_D3) // go to 4 bit wide mode if pins are defined
+    if (!retry_Cnt) {  // wide bus failed, go back to one bit wide mode
+      hsd.State = (HAL_SD_StateTypeDef) 0;  // HAL_SD_STATE_RESET
+      SD_LowLevel_Init();
      retry_Cnt = retryCnt;
      for (;;) {
        TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
-        if (!HAL_SD_ConfigWideBusOperation(&hsd, SDIO_BUS_WIDE_4B)) break;  // some cards are only 1 bit wide so a pass here is not required
-        if (!--retry_Cnt) break;
+        status = (bool) HAL_SD_Init(&hsd);
+        if (!status) break;
+        if (!--retry_Cnt) return false;   // return failing status if retries are exhausted
      }
-      if (!retry_Cnt) {  // wide bus failed, go back to one bit wide mode
-        hsd.State = (HAL_SD_StateTypeDef) 0;  // HAL_SD_STATE_RESET
-        SD_LowLevel_Init();
-        retry_Cnt = retryCnt;
-        for (;;) {
-          TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
-          status = (bool) HAL_SD_Init(&hsd);
-          if (!status) break;
-          if (!--retry_Cnt) return false;   // return failing status if retries are exhausted
-        }
-        go_to_transfer_speed();
-      }
-    #endif
+      go_to_transfer_speed();
+    }
+  #endif

-    return true;
+  return true;
+}
+
+static bool SDIO_ReadWriteBlock_DMA(uint32_t block, const uint8_t *src, uint8_t *dst) {
+  if (HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER) return false;
+
+  TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
+
+  HAL_StatusTypeDef ret;
+  if (src) {
+    hdma_sdio.Init.Direction = DMA_MEMORY_TO_PERIPH;
+    HAL_DMA_Init(&hdma_sdio);
+    ret = HAL_SD_WriteBlocks_DMA(&hsd, (uint8_t *)src, block, 1);
+  }
+  else {
+    hdma_sdio.Init.Direction = DMA_PERIPH_TO_MEMORY;
+    HAL_DMA_Init(&hdma_sdio);
+    ret = HAL_SD_ReadBlocks_DMA(&hsd, (uint8_t *)dst, block, 1);
  }

-  static bool SDIO_ReadWriteBlock_DMA(uint32_t block, const uint8_t *src, uint8_t *dst) {
-    if (HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER) return false;
+  if (ret != HAL_OK) {
+    HAL_DMA_Abort_IT(&hdma_sdio);
+    HAL_DMA_DeInit(&hdma_sdio);
+    return false;
+  }

-    TERN_(USE_WATCHDOG, HAL_watchdog_refresh());
-
-    HAL_StatusTypeDef ret;
-    if (src) {
-      hdma_sdio.Init.Direction = DMA_MEMORY_TO_PERIPH;
-      HAL_DMA_Init(&hdma_sdio);
-      ret = HAL_SD_WriteBlocks_DMA(&hsd, (uint8_t *)src, block, 1);
-    }
-    else {
-      hdma_sdio.Init.Direction = DMA_PERIPH_TO_MEMORY;
-      HAL_DMA_Init(&hdma_sdio);
-      ret = HAL_SD_ReadBlocks_DMA(&hsd, (uint8_t *)dst, block, 1);
-    }
-
-    if (ret != HAL_OK) {
+  millis_t timeout = millis() + 500;
+  // Wait the transfer
+  while (hsd.State != HAL_SD_STATE_READY) {
+    if (ELAPSED(millis(), timeout)) {
      HAL_DMA_Abort_IT(&hdma_sdio);
      HAL_DMA_DeInit(&hdma_sdio);
      return false;
    }
-
-    millis_t timeout = millis() + 500;
-    // Wait the transfer
-    while (hsd.State != HAL_SD_STATE_READY) {
-      if (ELAPSED(millis(), timeout)) {
-        HAL_DMA_Abort_IT(&hdma_sdio);
-        HAL_DMA_DeInit(&hdma_sdio);
-        return false;
-      }
-    }
-
-    while (__HAL_DMA_GET_FLAG(&hdma_sdio, __HAL_DMA_GET_TC_FLAG_INDEX(&hdma_sdio)) != 0
-        || __HAL_DMA_GET_FLAG(&hdma_sdio, __HAL_DMA_GET_TE_FLAG_INDEX(&hdma_sdio)) != 0) { /* nada */ }
-
-    HAL_DMA_Abort_IT(&hdma_sdio);
-    HAL_DMA_DeInit(&hdma_sdio);
-
-    timeout = millis() + 500;
-    while (HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER) if (ELAPSED(millis(), timeout)) return false;
-
-    return true;
  }

-  bool SDIO_ReadBlock(uint32_t block, uint8_t *dst) {
-    uint8_t retries = SDIO_READ_RETRIES;
-    while (retries--) if (SDIO_ReadWriteBlock_DMA(block, NULL, dst)) return true;
-    return false;
-  }
+  while (__HAL_DMA_GET_FLAG(&hdma_sdio, __HAL_DMA_GET_TC_FLAG_INDEX(&hdma_sdio)) != 0
+      || __HAL_DMA_GET_FLAG(&hdma_sdio, __HAL_DMA_GET_TE_FLAG_INDEX(&hdma_sdio)) != 0) { /* nada */ }

-  bool SDIO_WriteBlock(uint32_t block, const uint8_t *src) {
-    uint8_t retries = SDIO_READ_RETRIES;
-    while (retries--) if (SDIO_ReadWriteBlock_DMA(block, src, NULL)) return true;
-    return false;
-  }
+  HAL_DMA_Abort_IT(&hdma_sdio);
+  HAL_DMA_DeInit(&hdma_sdio);

-  #if defined(STM32F1xx)
-    #define DMA_IRQ_HANDLER DMA2_Channel4_5_IRQHandler
-  #elif defined(STM32F4xx)
-    #define DMA_IRQ_HANDLER DMA2_Stream3_IRQHandler
-  #else
-    #error "Unknown STM32 architecture."
-  #endif
+  timeout = millis() + 500;
+  while (HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER) if (ELAPSED(millis(), timeout)) return false;

-  extern "C" void SDIO_IRQHandler(void) { HAL_SD_IRQHandler(&hsd); }
-  extern "C" void DMA_IRQ_HANDLER(void) { HAL_DMA_IRQHandler(&hdma_sdio); }
+  return true;
+}
+
+bool SDIO_ReadBlock(uint32_t block, uint8_t *dst) {
+  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) {
+  uint8_t retries = SDIO_READ_RETRIES;
+  while (retries--) if (SDIO_ReadWriteBlock_DMA(block, src, nullptr)) return true;
+  return false;
+}
+
+bool SDIO_IsReady() {
+  return hsd.State == HAL_SD_STATE_READY;
+}
+
+uint32_t SDIO_GetCardSize() {
+  return (uint32_t)(hsd.SdCard.BlockNbr) * (hsd.SdCard.BlockSize);
+}
+
+#if defined(STM32F1xx)
+  #define DMA_IRQ_HANDLER DMA2_Channel4_5_IRQHandler
+#elif defined(STM32F4xx)
+  #define DMA_IRQ_HANDLER DMA2_Stream3_IRQHandler
+#else
+  #error "Unknown STM32 architecture."
+#endif
+
+extern "C" void SDIO_IRQHandler(void) { HAL_SD_IRQHandler(&hsd); }
+extern "C" void DMA_IRQ_HANDLER(void) { HAL_DMA_IRQHandler(&hdma_sdio); }

-#endif // !USBD_USE_CDC_COMPOSITE
 #endif // SDIO_SUPPORT
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -107,4 +107,4 @@ void libServo::setInterruptPriority(uint32_t preemptPriority, uint32_t subPriori
 }

 #endif // HAS_SERVOS
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -0,0 +1,82 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef STM32F1
+
+/**
+ * PersistentStore for Arduino-style EEPROM interface
+ * with simple implementations supplied by Marlin.
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(IIC_BL24CXX_EEPROM)
+
+#include "../shared/eeprom_if.h"
+#include "../shared/eeprom_api.h"
+
+//
+// PersistentStore
+//
+
+#ifndef MARLIN_EEPROM_SIZE
+  #error "MARLIN_EEPROM_SIZE is required for IIC_BL24CXX_EEPROM."
+#endif
+
+size_t PersistentStore::capacity()    { return MARLIN_EEPROM_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)pos;
+    if (v != eeprom_read_byte(p)) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
+      eeprom_write_byte(p, v);
+      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        return true;
+      }
+    }
+    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 {
+    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t c = eeprom_read_byte(p);
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+  return false;
+}
+
+#endif // IIC_BL24CXX_EEPROM
+#endif // STM32F1
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -28,6 +28,10 @@

 #include "../shared/eeprom_api.h"

+// Better: "utility/stm32_eeprom.h", but only after updating stm32duino to 2.0.0
+// Use EEPROM.h for compatibility, for now.
+#include <EEPROM.h>
+
 /**
 * The STM32 HAL supports chips that deal with "pages" and some with "sectors" and some that
 * even have multiple "banks" of flash.
@@ -266,4 +270,4 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t
 }

 #endif // FLASH_EEPROM_EMULATION
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -0,0 +1,54 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Platform-independent Arduino functions for I2C EEPROM.
+ * Enable USE_SHARED_EEPROM if not supplied by the framework.
+ */
+
+#ifdef STM32F1
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(IIC_BL24CXX_EEPROM)
+
+#include "../../libs/BL24CXX.h"
+#include "../shared/eeprom_if.h"
+
+void eeprom_init() { BL24CXX::init(); }
+
+// ------------------------
+// Public functions
+// ------------------------
+
+void eeprom_write_byte(uint8_t *pos, uint8_t value) {
+  const unsigned eeprom_address = (unsigned)pos;
+  return 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 // STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 /**
 * Implementation of EEPROM settings in SD Card
@@ -88,4 +88,4 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, const size_t size, uin
 }

 #endif // SDCARD_EEPROM_EMULATION
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -65,4 +65,4 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t
 }

 #endif // SRAM_EEPROM_EMULATION
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -75,4 +75,4 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t
 }

 #endif // USE_WIRED_EEPROM
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -46,4 +46,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfigPre.h"

@@ -56,4 +56,4 @@ void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255
 }

 #endif // NEEDS_HARDWARE_PWM
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -20,7 +20,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -31,4 +31,4 @@ void FastIO_init() {
    FastIOPortMap[STM_PORT(digitalPin[i])] = get_GPIO_Port(STM_PORT(digitalPin[i]));
 }

-#endif
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -21,7 +21,7 @@
 */
 #pragma once

-#if defined(USBD_USE_CDC_MSC) && DISABLED(NO_SD_HOST_DRIVE)
+#if BOTH(SDSUPPORT, USBD_USE_CDC_MSC) && DISABLED(NO_SD_HOST_DRIVE)
  #define HAS_SD_HOST_DRIVE 1
 #endif

@@ -30,3 +30,6 @@
  #undef F_CPU
  #define F_CPU BOARD_F_CPU
 #endif
+
+// The Sensitive Pins array is not optimizable
+#define RUNTIME_ONLY_ANALOG_TO_DIGITAL
@@ -13,29 +13,32 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)
+
 #include "../../inc/MarlinConfigPre.h"

-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && HAS_SD_HOST_DRIVE
+#if HAS_SD_HOST_DRIVE

-#include "msc_sd.h"
 #include "../shared/Marduino.h"
+#include "msc_sd.h"
 #include "usbd_core.h"
+
+#include "../../sd/cardreader.h"
+
 #include <USB.h>
 #include <USBMscHandler.h>

 #define BLOCK_SIZE 512
 #define PRODUCT_ID 0x29

-#include "../../sd/cardreader.h"
-
 class Sd2CardUSBMscHandler : public USBMscHandler {
 public:
  DiskIODriver* diskIODriver() {
    #if ENABLED(MULTI_VOLUME)
      #if SHARED_VOLUME_IS(SD_ONBOARD)
-        return &card.media_sd_spi;
+        return &card.media_driver_sdcard;
      #elif SHARED_VOLUME_IS(USB_FLASH_DRIVE)
-        return &card.media_usbFlashDrive;
+        return &card.media_driver_usbFlash;
      #endif
    #else
      return card.diskIODriver();
@@ -121,4 +124,5 @@ void MSC_SD_init() {
  USBDevice.begin();
 }

-#endif // __STM32F1__ && HAS_SD_HOST_DRIVE
+#endif // HAS_SD_HOST_DRIVE
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../../inc/MarlinConfig.h"

@@ -199,4 +199,4 @@ bool GT911::getPoint(int16_t *x, int16_t *y) {
 }

 #endif // TFT_TOUCH_DEVICE_GT911
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../../inc/MarlinConfig.h"

@@ -178,4 +178,4 @@ void TFT_FSMC::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Cou
 }

 #endif // HAS_FSMC_TFT
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../../inc/MarlinConfig.h"

@@ -384,4 +384,4 @@ void TFT_LTDC::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Cou
 }

 #endif // HAS_LTDC_TFT
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../../inc/MarlinConfig.h"

@@ -125,12 +125,20 @@ void TFT_SPI::DataTransferBegin(uint16_t DataSize) {
  WRITE(TFT_CS_PIN, LOW);
 }

+#ifdef TFT_DEFAULT_DRIVER
+  #include "../../../lcd/tft_io/tft_ids.h"
+#endif
+
 uint32_t TFT_SPI::GetID() {
  uint32_t id;
  id = ReadID(LCD_READ_ID);
-
-  if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
+  if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF) {
    id = ReadID(LCD_READ_ID4);
+    #ifdef TFT_DEFAULT_DRIVER
+      if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
+        id = TFT_DEFAULT_DRIVER;
+    #endif
+   }
  return id;
 }

@@ -232,4 +240,4 @@ void TFT_SPI::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Coun
 }

 #endif // HAS_SPI_TFT
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../../inc/MarlinConfig.h"

@@ -167,4 +167,4 @@ uint16_t XPT2046::SoftwareIO(uint16_t data) {
 }

 #endif // HAS_TFT_XPT2046
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -56,7 +56,7 @@ enum XPTCoordinate : uint8_t {
  XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
 };

-#if !defined(XPT2046_Z1_THRESHOLD)
+#ifndef XPT2046_Z1_THRESHOLD
  #define XPT2046_Z1_THRESHOLD 10
 #endif

@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -319,4 +319,4 @@ static constexpr bool verify_no_timer_conflicts() {
 // when hovering over it, making it easy to identify the conflicting timers.
 static_assert(verify_no_timer_conflicts(), "One or more timer conflict detected. Examine \"timers_in_use\" to help identify conflict.");

-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -20,7 +20,7 @@
 *
 */

-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfig.h"

@@ -114,4 +114,4 @@ uint8_t BulkStorage::Write(uint8_t lun, uint32_t addr, uint16_t bsize, uint8_t b
 }

 #endif // USE_OTG_USB_HOST && USBHOST
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -16,7 +16,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfigPre.h"

@@ -51,4 +51,4 @@ void USB_Hook_init() {
 }

 #endif // EMERGENCY_PARSER && USBD_USE_CDC
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -19,7 +19,7 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) && !defined(MAPLE_STM32F1)

 #include "../../inc/MarlinConfigPre.h"

@@ -46,4 +46,4 @@ void HAL_watchdog_refresh() {
 }

 #endif // USE_WATCHDOG
-#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC && !MAPLE_STM32F1
@@ -167,6 +167,15 @@ constexpr bool IsSerialClassAllowed(const HardwareSerial&) { return false; }
 #if AXIS_HAS_HW_SERIAL(Z4)
  CHECK_AXIS_SERIAL(Z4);
 #endif
+#if AXIS_HAS_HW_SERIAL(I)
+  CHECK_AXIS_SERIAL(I);
+#endif
+#if AXIS_HAS_HW_SERIAL(J)
+  CHECK_AXIS_SERIAL(J);
+#endif
+#if AXIS_HAS_HW_SERIAL(K)
+  CHECK_AXIS_SERIAL(K);
+#endif
 #if AXIS_HAS_HW_SERIAL(E0)
  CHECK_AXIS_SERIAL(E0);
 #endif
@@ -138,8 +138,8 @@ private:
  spi_dev *spi_d;
  dma_channel spiRxDmaChannel, spiTxDmaChannel;
  dma_dev* spiDmaDev;
-  void (*receiveCallback)() = NULL;
-  void (*transmitCallback)() = NULL;
+  void (*receiveCallback)() = nullptr;
+  void (*transmitCallback)() = nullptr;

  friend class SPIClass;
 };
@@ -11,6 +11,7 @@ if __name__ == "__main__":
                    "-fsigned-char",
                    "-fno-move-loop-invariants",
                    "-fno-strict-aliasing",
+                    "-fsingle-precision-constant",

                    "--specs=nano.specs",
                    "--specs=nosys.specs",
@@ -22,7 +22,7 @@

 #if BOTH(HAS_MARLINUI_U8GLIB, FORCE_SOFT_SPI)

-#include <U8glib.h>
+#include <U8glib-HAL.h>
 #include "../../shared/HAL_SPI.h"

 #ifndef LCD_SPI_SPEED
@@ -71,4 +71,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -39,7 +39,7 @@
  #error "SERIAL_STATS_DROPPED_RX is not supported on the STM32F1 platform."
 #endif

-#if ENABLED(NEOPIXEL_LED)
+#if ENABLED(NEOPIXEL_LED) && DISABLED(MKS_MINI_12864_V3)
  #error "NEOPIXEL_LED (Adafruit NeoPixel) is not supported for HAL/STM32F1. Comment out this line to proceed at your own risk!"
 #endif

@@ -13,9 +13,11 @@
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
+#ifdef __STM32F1__
+
 #include "../../inc/MarlinConfigPre.h"

-#if defined(__STM32F1__) && HAS_SD_HOST_DRIVE
+#if HAS_SD_HOST_DRIVE

 #include "msc_sd.h"
 #include "SPI.h"
@@ -92,4 +94,5 @@ void MSC_SD_init() {
  #endif
 }

-#endif // __STM32F1__ && HAS_SD_HOST_DRIVE
+#endif // HAS_SD_HOST_DRIVE
+#endif // __STM32F1__
@@ -38,8 +38,8 @@
  #define SPI_CLOCK_MAX SPI_BAUD_PCLK_DIV_2
 #endif

-#define CS_LOW()  WRITE(ONBOARD_SD_CS_PIN, LOW)  /* Set OnboardSPI cs low */
-#define CS_HIGH() WRITE(ONBOARD_SD_CS_PIN, HIGH) /* Set OnboardSPI cs high */
+#define CS_LOW()  WRITE(ONBOARD_SD_CS_PIN, LOW)  // Set OnboardSPI cs low
+#define CS_HIGH() WRITE(ONBOARD_SD_CS_PIN, HIGH) // Set OnboardSPI cs high

 #define FCLK_FAST() ONBOARD_SD_SPI.setClockDivider(SPI_CLOCK_MAX)
 #define FCLK_SLOW() ONBOARD_SD_SPI.setClockDivider(SPI_BAUD_PCLK_DIV_256)
@@ -49,32 +49,32 @@
 ---------------------------------------------------------------------------*/

 /* MMC/SD command */
-#define CMD0  (0)     /* GO_IDLE_STATE */
-#define CMD1  (1)     /* SEND_OP_COND (MMC) */
-#define ACMD41  (0x80+41) /* SEND_OP_COND (SDC) */
-#define CMD8  (8)     /* SEND_IF_COND */
-#define CMD9  (9)     /* SEND_CSD */
-#define CMD10 (10)    /* SEND_CID */
-#define CMD12 (12)    /* STOP_TRANSMISSION */
-#define ACMD13  (0x80+13) /* SD_STATUS (SDC) */
-#define CMD16 (16)    /* SET_BLOCKLEN */
-#define CMD17 (17)    /* READ_SINGLE_BLOCK */
-#define CMD18 (18)    /* READ_MULTIPLE_BLOCK */
-#define CMD23 (23)    /* SET_BLOCK_COUNT (MMC) */
-#define ACMD23  (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
-#define CMD24 (24)    /* WRITE_BLOCK */
-#define CMD25 (25)    /* WRITE_MULTIPLE_BLOCK */
-#define CMD32 (32)    /* ERASE_ER_BLK_START */
-#define CMD33 (33)    /* ERASE_ER_BLK_END */
-#define CMD38 (38)    /* ERASE */
-#define CMD48 (48)    /* READ_EXTR_SINGLE */
-#define CMD49 (49)    /* WRITE_EXTR_SINGLE */
-#define CMD55 (55)    /* APP_CMD */
-#define CMD58 (58)    /* READ_OCR */
+#define CMD0  (0)         // GO_IDLE_STATE
+#define CMD1  (1)         // SEND_OP_COND (MMC)
+#define ACMD41  (0x80+41) // SEND_OP_COND (SDC)
+#define CMD8  (8)         // SEND_IF_COND
+#define CMD9  (9)         // SEND_CSD
+#define CMD10 (10)        // SEND_CID
+#define CMD12 (12)        // STOP_TRANSMISSION
+#define ACMD13  (0x80+13) // SD_STATUS (SDC)
+#define CMD16 (16)        // SET_BLOCKLEN
+#define CMD17 (17)        // READ_SINGLE_BLOCK
+#define CMD18 (18)        // READ_MULTIPLE_BLOCK
+#define CMD23 (23)        // SET_BLOCK_COUNT (MMC)
+#define ACMD23  (0x80+23) // SET_WR_BLK_ERASE_COUNT (SDC)
+#define CMD24 (24)        // WRITE_BLOCK
+#define CMD25 (25)        // WRITE_MULTIPLE_BLOCK
+#define CMD32 (32)        // ERASE_ER_BLK_START
+#define CMD33 (33)        // ERASE_ER_BLK_END
+#define CMD38 (38)        // ERASE
+#define CMD48 (48)        // READ_EXTR_SINGLE
+#define CMD49 (49)        // WRITE_EXTR_SINGLE
+#define CMD55 (55)        // APP_CMD
+#define CMD58 (58)        // READ_OCR

-static volatile DSTATUS Stat = STA_NOINIT;  /* Physical drive status */
+static volatile DSTATUS Stat = STA_NOINIT;  // Physical drive status
 static volatile UINT timeout;
-static BYTE CardType;      /* Card type flags */
+static BYTE CardType;                       // Card type flags

 /*-----------------------------------------------------------------------*/
 /* Send/Receive data to the MMC  (Platform dependent)                    */
@@ -82,7 +82,7 @@ static BYTE CardType;      /* Card type flags */

 /* Exchange a byte */
 static BYTE xchg_spi (
-  BYTE dat  /* Data to send */
+  BYTE dat  // Data to send
 ) {
  BYTE returnByte = ONBOARD_SD_SPI.transfer(dat);
  return returnByte;
@@ -90,18 +90,18 @@ static BYTE xchg_spi (

 /* Receive multiple byte */
 static void rcvr_spi_multi (
-  BYTE *buff,   /* Pointer to data buffer */
-  UINT btr    /* Number of bytes to receive (16, 64 or 512) */
+  BYTE *buff,   // Pointer to data buffer
+  UINT btr      // Number of bytes to receive (16, 64 or 512)
 ) {
  ONBOARD_SD_SPI.dmaTransfer(0, const_cast<uint8_t*>(buff), btr);
 }

 #if _DISKIO_WRITE

-  /* Send multiple bytes */
+  // Send multiple bytes
  static void xmit_spi_multi (
-    const BYTE *buff, /* Pointer to the data */
-    UINT btx      /* Number of bytes to send (multiple of 16) */
+    const BYTE *buff, // Pointer to the data
+    UINT btx          // Number of bytes to send (multiple of 16)
  ) {
    ONBOARD_SD_SPI.dmaSend(const_cast<uint8_t*>(buff), btx);
  }
@@ -112,16 +112,15 @@ static void rcvr_spi_multi (
 /* Wait for card ready                                                   */
 /*-----------------------------------------------------------------------*/

-static int wait_ready (  /* 1:Ready, 0:Timeout */
-  UINT wt     /* Timeout [ms] */
+static int wait_ready ( // 1:Ready, 0:Timeout
+  UINT wt               // Timeout [ms]
 ) {
  BYTE d;
-
  timeout = millis() + wt;
  do {
    d = xchg_spi(0xFF);
-    /* This loop takes a while. Insert rot_rdq() here for multitask environment. */
-  } while (d != 0xFF && (timeout > millis()));  /* Wait for card goes ready or timeout */
+    // This loop takes a while. Insert rot_rdq() here for multitask environment.
+  } while (d != 0xFF && (timeout > millis()));  // Wait for card goes ready or timeout

  return (d == 0xFF) ? 1 : 0;
 }
@@ -131,21 +130,21 @@ static int wait_ready (  /* 1:Ready, 0:Timeout */
 /*-----------------------------------------------------------------------*/

 static void deselect() {
-  CS_HIGH();    /* CS = H */
-  xchg_spi(0xFF); /* Dummy clock (force DO hi-z for multiple slave SPI) */
+  CS_HIGH();      // CS = H
+  xchg_spi(0xFF); // Dummy clock (force DO hi-z for multiple slave SPI)
 }

 /*-----------------------------------------------------------------------*/
 /* Select card and wait for ready                                        */
 /*-----------------------------------------------------------------------*/

-static int select() { /* 1:OK, 0:Timeout */
-  CS_LOW();   /* CS = L */
-  xchg_spi(0xFF); /* Dummy clock (force DO enabled) */
+static int select() {             // 1:OK, 0:Timeout
+  CS_LOW();                       // CS = L
+  xchg_spi(0xFF);                 // Dummy clock (force DO enabled)

-  if (wait_ready(500)) return 1;  /* Leading busy check: Wait for card ready */
+  if (wait_ready(500)) return 1;  // Leading busy check: Wait for card ready

-  deselect();   /* Timeout */
+  deselect();                     // Timeout
  return 0;
 }

@@ -153,16 +152,18 @@ static int select() { /* 1:OK, 0:Timeout */
 /* Control SPI module (Platform dependent)                               */
 /*-----------------------------------------------------------------------*/

-static void power_on() {  /* Enable SSP module and attach it to I/O pads */
+// Enable SSP module and attach it to I/O pads
+static void sd_power_on() {
  ONBOARD_SD_SPI.setModule(ONBOARD_SPI_DEVICE);
  ONBOARD_SD_SPI.begin();
  ONBOARD_SD_SPI.setBitOrder(MSBFIRST);
  ONBOARD_SD_SPI.setDataMode(SPI_MODE0);
-  OUT_WRITE(ONBOARD_SD_CS_PIN, HIGH); /* Set CS# high */
+  OUT_WRITE(ONBOARD_SD_CS_PIN, HIGH); // Set CS# high
 }

-static void power_off() {   /* Disable SPI function */
-  select();       /* Wait for card ready */
+// Disable SPI function
+static void sd_power_off() {
+  select();                           // Wait for card ready
  deselect();
 }

@@ -170,23 +171,23 @@ static void power_off() {   /* Disable SPI function */
 /* Receive a data packet from the MMC                                    */
 /*-----------------------------------------------------------------------*/

-static int rcvr_datablock (  /* 1:OK, 0:Error */
-  BYTE *buff,     /* Data buffer */
-  UINT btr      /* Data block length (byte) */
+static int rcvr_datablock (   // 1:OK, 0:Error
+  BYTE *buff,                 // Data buffer
+  UINT btr                    // Data block length (byte)
 ) {
  BYTE token;

  timeout = millis() + 200;
-  do {              /* Wait for DataStart token in timeout of 200ms */
+  do {                            // Wait for DataStart token in timeout of 200ms
    token = xchg_spi(0xFF);
-    /* This loop will take a while. Insert rot_rdq() here for multitask environment. */
+                                  // This loop will take a while. Insert rot_rdq() here for multitask environment.
  } while ((token == 0xFF) && (timeout > millis()));
-  if (token != 0xFE) return 0;   /* Function fails if invalid DataStart token or timeout */
+  if (token != 0xFE) return 0;    // Function fails if invalid DataStart token or timeout

-  rcvr_spi_multi(buff, btr);    /* Store trailing data to the buffer */
-  xchg_spi(0xFF); xchg_spi(0xFF); /* Discard CRC */
+  rcvr_spi_multi(buff, btr);      // Store trailing data to the buffer
+  xchg_spi(0xFF); xchg_spi(0xFF); // Discard CRC

-  return 1;           /* Function succeeded */
+  return 1;                       // Function succeeded
 }

 /*-----------------------------------------------------------------------*/
@@ -195,25 +196,25 @@ static int rcvr_datablock (  /* 1:OK, 0:Error */

 #if _DISKIO_WRITE

-  static int xmit_datablock (  /* 1:OK, 0:Failed */
-    const BYTE *buff, /* Ponter to 512 byte data to be sent */
-    BYTE token      /* Token */
+  static int xmit_datablock(  // 1:OK, 0:Failed
+    const BYTE *buff,         // Pointer to 512 byte data to be sent
+    BYTE token                // Token
  ) {
    BYTE resp;

-    if (!wait_ready(500)) return 0;   /* Leading busy check: Wait for card ready to accept data block */
+    if (!wait_ready(500)) return 0;       // Leading busy check: Wait for card ready to accept data block

-    xchg_spi(token);          /* Send token */
-    if (token == 0xFD) return 1;    /* Do not send data if token is StopTran */
+    xchg_spi(token);                      // Send token
+    if (token == 0xFD) return 1;          // Do not send data if token is StopTran

-    xmit_spi_multi(buff, 512);      /* Data */
-    xchg_spi(0xFF); xchg_spi(0xFF);   /* Dummy CRC */
+    xmit_spi_multi(buff, 512);            // Data
+    xchg_spi(0xFF); xchg_spi(0xFF);       // Dummy CRC

-    resp = xchg_spi(0xFF);        /* Receive data resp */
+    resp = xchg_spi(0xFF);                // Receive data resp

-    return (resp & 0x1F) == 0x05 ? 1 : 0; /* Data was accepted or not */
+    return (resp & 0x1F) == 0x05 ? 1 : 0; // Data was accepted or not

-    /* Busy check is done at next transmission */
+    // Busy check is done at next transmission
  }

 #endif // _DISKIO_WRITE
@@ -222,43 +223,43 @@ static int rcvr_datablock (  /* 1:OK, 0:Error */
 /* Send a command packet to the MMC                                      */
 /*-----------------------------------------------------------------------*/

-static BYTE send_cmd (   /* Return value: R1 resp (bit7==1:Failed to send) */
-  BYTE cmd,   /* Command index */
-  DWORD arg   /* Argument */
+static BYTE send_cmd( // Return value: R1 resp (bit7==1:Failed to send)
+  BYTE cmd,           // Command index
+  DWORD arg           // Argument
 ) {
  BYTE n, res;

-  if (cmd & 0x80) { /* Send a CMD55 prior to ACMD<n> */
+  if (cmd & 0x80) {   // Send a CMD55 prior to ACMD<n>
    cmd &= 0x7F;
    res = send_cmd(CMD55, 0);
    if (res > 1) return res;
  }

-  /* Select the card and wait for ready except to stop multiple block read */
+  // Select the card and wait for ready except to stop multiple block read
  if (cmd != CMD12) {
    deselect();
    if (!select()) return 0xFF;
  }

-  /* Send command packet */
-  xchg_spi(0x40 | cmd);       /* Start + command index */
-  xchg_spi((BYTE)(arg >> 24));    /* Argument[31..24] */
-  xchg_spi((BYTE)(arg >> 16));    /* Argument[23..16] */
-  xchg_spi((BYTE)(arg >> 8));     /* Argument[15..8] */
-  xchg_spi((BYTE)arg);        /* Argument[7..0] */
-  n = 0x01;             /* Dummy CRC + Stop */
-  if (cmd == CMD0) n = 0x95;      /* Valid CRC for CMD0(0) */
-  if (cmd == CMD8) n = 0x87;      /* Valid CRC for CMD8(0x1AA) */
+  // Send command packet
+  xchg_spi(0x40 | cmd);         // Start + command index
+  xchg_spi((BYTE)(arg >> 24));  // Argument[31..24]
+  xchg_spi((BYTE)(arg >> 16));  // Argument[23..16]
+  xchg_spi((BYTE)(arg >> 8));   // Argument[15..8]
+  xchg_spi((BYTE)arg);          // Argument[7..0]
+  n = 0x01;                     // Dummy CRC + Stop
+  if (cmd == CMD0) n = 0x95;    // Valid CRC for CMD0(0)
+  if (cmd == CMD8) n = 0x87;    // Valid CRC for CMD8(0x1AA)
  xchg_spi(n);

-  /* Receive command resp */
-  if (cmd == CMD12) xchg_spi(0xFF); /* Diacard following one byte when CMD12 */
-  n = 10;               /* Wait for response (10 bytes max) */
+  // Receive command response
+  if (cmd == CMD12) xchg_spi(0xFF); // Discard the following byte when CMD12
+  n = 10;                           // Wait for response (10 bytes max)
  do
    res = xchg_spi(0xFF);
  while ((res & 0x80) && --n);

-  return res;             /* Return received response */
+  return res;                   // Return received response
 }

 /*--------------------------------------------------------------------------
@@ -270,49 +271,52 @@ static BYTE send_cmd (   /* Return value: R1 resp (bit7==1:Failed to send) */
 /*-----------------------------------------------------------------------*/

 DSTATUS disk_initialize (
-  BYTE drv    /* Physical drive number (0) */
+  BYTE drv                                                            // Physical drive number (0)
 ) {
  BYTE n, cmd, ty, ocr[4];

-  if (drv) return STA_NOINIT;     /* Supports only drive 0 */
-  power_on();             /* Initialize SPI */
+  if (drv) return STA_NOINIT;                                         // Supports only drive 0
+  sd_power_on();                                                      // Initialize SPI

-  if (Stat & STA_NODISK) return Stat; /* Is a card existing in the soket? */
+  if (Stat & STA_NODISK) return Stat;                                 // Is a card existing in the soket?

  FCLK_SLOW();
-  for (n = 10; n; n--) xchg_spi(0xFF);  /* Send 80 dummy clocks */
+  for (n = 10; n; n--) xchg_spi(0xFF);                                // Send 80 dummy clocks

  ty = 0;
-  if (send_cmd(CMD0, 0) == 1) {     /* Put the card SPI state */
-    timeout = millis() + 1000;            /* Initialization timeout = 1 sec */
-    if (send_cmd(CMD8, 0x1AA) == 1) { /* Is the catd SDv2? */
-      for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);  /* Get 32 bit return value of R7 resp */
-      if (ocr[2] == 0x01 && ocr[3] == 0xAA) {       /* Does the card support 2.7-3.6V? */
-        while ((timeout > millis()) && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
-        if ((timeout > millis()) && send_cmd(CMD58, 0) == 0) {    /* Check CCS bit in the OCR */
+  if (send_cmd(CMD0, 0) == 1) {                                       // Put the card SPI state
+    timeout = millis() + 1000;                                        // Initialization timeout = 1 sec
+    if (send_cmd(CMD8, 0x1AA) == 1) {                                 // Is the catd SDv2?
+      for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);                // Get 32 bit return value of R7 resp
+      if (ocr[2] == 0x01 && ocr[3] == 0xAA) {                         // Does the card support 2.7-3.6V?
+        while ((timeout > millis()) && send_cmd(ACMD41, 1UL << 30));  // Wait for end of initialization with ACMD41(HCS)
+        if ((timeout > millis()) && send_cmd(CMD58, 0) == 0) {        // Check CCS bit in the OCR
          for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
-          ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;  /* Check if the card is SDv2 */
+          ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;          // Check if the card is SDv2
        }
      }
-    } else {  /* Not an SDv2 card */
-      if (send_cmd(ACMD41, 0) <= 1)   { /* SDv1 or MMCv3? */
-        ty = CT_SD1; cmd = ACMD41;  /* SDv1 (ACMD41(0)) */
-      } else {
-        ty = CT_MMC; cmd = CMD1;  /* MMCv3 (CMD1(0)) */
+    }
+    else {                                                            // Not an SDv2 card
+      if (send_cmd(ACMD41, 0) <= 1)   {                               // SDv1 or MMCv3?
+        ty = CT_SD1; cmd = ACMD41;                                    // SDv1 (ACMD41(0))
      }
-      while ((timeout > millis()) && send_cmd(cmd, 0)) ;    /* Wait for the card leaves idle state */
-      if (!(timeout > millis()) || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
+      else {
+        ty = CT_MMC; cmd = CMD1;                                      // MMCv3 (CMD1(0))
+      }
+      while ((timeout > millis()) && send_cmd(cmd, 0));               // Wait for the card leaves idle state
+      if (!(timeout > millis()) || send_cmd(CMD16, 512) != 0)         // Set block length: 512
        ty = 0;
    }
  }
-  CardType = ty;  /* Card type */
+  CardType = ty;                                                      // Card type
  deselect();

-  if (ty) {   /* OK */
-    FCLK_FAST();      /* Set fast clock */
-    Stat &= ~STA_NOINIT;  /* Clear STA_NOINIT flag */
-  } else {    /* Failed */
-    power_off();
+  if (ty) {                                                           // OK
+    FCLK_FAST();                                                      // Set fast clock
+    Stat &= ~STA_NOINIT;                                              // Clear STA_NOINIT flag
+  }
+  else {                                                              // Failed
+    sd_power_off();
    Stat = STA_NOINIT;
  }

@@ -324,10 +328,10 @@ DSTATUS disk_initialize (
 /*-----------------------------------------------------------------------*/

 DSTATUS disk_status (
-  BYTE drv    /* Physical drive number (0) */
+  BYTE drv                    // Physical drive number (0)
 ) {
-  if (drv) return STA_NOINIT;   /* Supports only drive 0 */
-  return Stat;  /* Return disk status */
+  if (drv) return STA_NOINIT; // Supports only drive 0
+  return Stat;                // Return disk status
 }

 /*-----------------------------------------------------------------------*/
@@ -335,28 +339,28 @@ DSTATUS disk_status (
 /*-----------------------------------------------------------------------*/

 DRESULT disk_read (
-  BYTE drv,   /* Physical drive number (0) */
-  BYTE *buff,   /* Pointer to the data buffer to store read data */
-  DWORD sector, /* Start sector number (LBA) */
-  UINT count    /* Number of sectors to read (1..128) */
+  BYTE drv,     // Physical drive number (0)
+  BYTE *buff,   // Pointer to the data buffer to store read data
+  DWORD sector, // Start sector number (LBA)
+  UINT count    // Number of sectors to read (1..128)
 ) {
  BYTE cmd;

-  if (drv || !count) return RES_PARERR;   /* Check parameter */
-  if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
-  if (!(CardType & CT_BLOCK)) sector *= 512;  /* LBA ot BA conversion (byte addressing cards) */
+  if (drv || !count) return RES_PARERR;       // Check parameter
+  if (Stat & STA_NOINIT) return RES_NOTRDY;   // Check if drive is ready
+  if (!(CardType & CT_BLOCK)) sector *= 512;  // LBA ot BA conversion (byte addressing cards)
  FCLK_FAST();
-  cmd = count > 1 ? CMD18 : CMD17;      /*  READ_MULTIPLE_BLOCK : READ_SINGLE_BLOCK */
+  cmd = count > 1 ? CMD18 : CMD17;            //  READ_MULTIPLE_BLOCK : READ_SINGLE_BLOCK
  if (send_cmd(cmd, sector) == 0) {
    do {
      if (!rcvr_datablock(buff, 512)) break;
      buff += 512;
    } while (--count);
-    if (cmd == CMD18) send_cmd(CMD12, 0); /* STOP_TRANSMISSION */
+    if (cmd == CMD18) send_cmd(CMD12, 0);     // STOP_TRANSMISSION
  }
  deselect();

-  return count ? RES_ERROR : RES_OK;  /* Return result */
+  return count ? RES_ERROR : RES_OK;          // Return result
 }

 /*-----------------------------------------------------------------------*/
@@ -366,36 +370,36 @@ DRESULT disk_read (
 #if _DISKIO_WRITE

  DRESULT disk_write(
-    BYTE drv,     /* Physical drive number (0) */
-    const BYTE *buff, /* Ponter to the data to write */
-    DWORD sector,   /* Start sector number (LBA) */
-    UINT count      /* Number of sectors to write (1..128) */
+    BYTE drv,                                   // Physical drive number (0)
+    const BYTE *buff,                           // Pointer to the data to write
+    DWORD sector,                               // Start sector number (LBA)
+    UINT count                                  // Number of sectors to write (1..128)
  ) {
-    if (drv || !count) return RES_PARERR;   /* Check parameter */
-    if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check drive status */
-    if (Stat & STA_PROTECT) return RES_WRPRT; /* Check write protect */
+    if (drv || !count) return RES_PARERR;       // Check parameter
+    if (Stat & STA_NOINIT) return RES_NOTRDY;   // Check drive status
+    if (Stat & STA_PROTECT) return RES_WRPRT;   // Check write protect
    FCLK_FAST();
-    if (!(CardType & CT_BLOCK)) sector *= 512;  /* LBA ==> BA conversion (byte addressing cards) */
+    if (!(CardType & CT_BLOCK)) sector *= 512;  // LBA ==> BA conversion (byte addressing cards)

-    if (count == 1) { /* Single sector write */
-      if ((send_cmd(CMD24, sector) == 0)  /* WRITE_BLOCK */
+    if (count == 1) {                           // Single sector write
+      if ((send_cmd(CMD24, sector) == 0)        // WRITE_BLOCK
        && xmit_datablock(buff, 0xFE)) {
        count = 0;
      }
    }
-    else {        /* Multiple sector write */
-      if (CardType & CT_SDC) send_cmd(ACMD23, count); /* Predefine number of sectors */
-      if (send_cmd(CMD25, sector) == 0) { /* WRITE_MULTIPLE_BLOCK */
+    else {                                            // Multiple sector write
+      if (CardType & CT_SDC) send_cmd(ACMD23, count); // Predefine number of sectors
+      if (send_cmd(CMD25, sector) == 0) {             // WRITE_MULTIPLE_BLOCK
        do {
          if (!xmit_datablock(buff, 0xFC)) break;
          buff += 512;
        } while (--count);
-        if (!xmit_datablock(0, 0xFD)) count = 1;  /* STOP_TRAN token */
+        if (!xmit_datablock(0, 0xFD)) count = 1;      // STOP_TRAN token
      }
    }
    deselect();

-    return count ? RES_ERROR : RES_OK;  /* Return result */
+    return count ? RES_ERROR : RES_OK;                // Return result
  }

 #endif // _DISKIO_WRITE
@@ -407,9 +411,9 @@ DRESULT disk_read (
 #if _DISKIO_IOCTL

  DRESULT disk_ioctl (
-    BYTE drv,   /* Physical drive number (0) */
-    BYTE cmd,   /* Control command code */
-    void *buff    /* Pointer to the conrtol data */
+    BYTE drv,   // Physical drive number (0)
+    BYTE cmd,   // Control command code
+    void *buff  // Pointer to the conrtol data
  ) {
    DRESULT res;
    BYTE n, csd[16], *ptr = (BYTE *)buff;
@@ -420,22 +424,23 @@ DRESULT disk_read (
      UINT dc;
    #endif

-    if (drv) return RES_PARERR;         /* Check parameter */
-    if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
+    if (drv) return RES_PARERR;                 // Check parameter
+    if (Stat & STA_NOINIT) return RES_NOTRDY;   // Check if drive is ready

    res = RES_ERROR;
    FCLK_FAST();
    switch (cmd) {
-      case CTRL_SYNC:     /* Wait for end of internal write process of the drive */
+      case CTRL_SYNC:                           // Wait for end of internal write process of the drive
        if (select()) res = RES_OK;
        break;

-      case GET_SECTOR_COUNT:  /* Get drive capacity in unit of sector (DWORD) */
+      case GET_SECTOR_COUNT:                    // Get drive capacity in unit of sector (DWORD)
        if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
-          if ((csd[0] >> 6) == 1) { /* SDC ver 2.00 */
+          if ((csd[0] >> 6) == 1) {             // SDC ver 2.00
            csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
            *(DWORD*)buff = csize << 10;
-          } else {          /* SDC ver 1.XX or MMC ver 3 */
+          }
+          else {                                // SDC ver 1.XX or MMC ver 3
            n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
            csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
            *(DWORD*)buff = csize << (n - 9);
@@ -444,21 +449,23 @@ DRESULT disk_read (
        }
        break;

-      case GET_BLOCK_SIZE:  /* Get erase block size in unit of sector (DWORD) */
-        if (CardType & CT_SD2) {  /* SDC ver 2.00 */
-          if (send_cmd(ACMD13, 0) == 0) { /* Read SD status */
+      case GET_BLOCK_SIZE:                              // Get erase block size in unit of sector (DWORD)
+        if (CardType & CT_SD2) {                        // SDC ver 2.00
+          if (send_cmd(ACMD13, 0) == 0) {               // Read SD status
            xchg_spi(0xFF);
-            if (rcvr_datablock(csd, 16)) {        /* Read partial block */
-              for (n = 64 - 16; n; n--) xchg_spi(0xFF); /* Purge trailing data */
+            if (rcvr_datablock(csd, 16)) {              // Read partial block
+              for (n = 64 - 16; n; n--) xchg_spi(0xFF); // Purge trailing data
              *(DWORD*)buff = 16UL << (csd[10] >> 4);
              res = RES_OK;
            }
          }
-        } else {          /* SDC ver 1.XX or MMC */
-          if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {  /* Read CSD */
-            if (CardType & CT_SD1) {  /* SDC ver 1.XX */
+        }
+        else {                                                        // SDC ver 1.XX or MMC
+          if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {  // Read CSD
+            if (CardType & CT_SD1) {                                  // SDC ver 1.XX
              *(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
-            } else {          /* MMC */
+            }
+            else {                                                    // MMC
              *(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
            }
            res = RES_OK;
@@ -466,47 +473,47 @@ DRESULT disk_read (
        }
        break;

-      case CTRL_TRIM:   /* Erase a block of sectors (used when _USE_TRIM in ffconf.h is 1) */
-        if (!(CardType & CT_SDC)) break;        /* Check if the card is SDC */
-        if (disk_ioctl(drv, MMC_GET_CSD, csd)) break; /* Get CSD */
-        if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break; /* Check if sector erase can be applied to the card */
-        dp = (DWORD *)buff; st = dp[0]; ed = dp[1];       /* Load sector block */
+      case CTRL_TRIM:                                   // Erase a block of sectors (used when _USE_TRIM in ffconf.h is 1)
+        if (!(CardType & CT_SDC)) break;                // Check if the card is SDC
+        if (disk_ioctl(drv, MMC_GET_CSD, csd)) break;   // Get CSD
+        if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break; // Check if sector erase can be applied to the card
+        dp = (DWORD *)buff; st = dp[0]; ed = dp[1];     // Load sector block
        if (!(CardType & CT_BLOCK)) {
          st *= 512; ed *= 512;
        }
-        if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000)) { /* Erase sector block */
-          res = RES_OK; /* FatFs does not check result of this command */
+        if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000)) { // Erase sector block
+          res = RES_OK; // FatFs does not check result of this command
        }
        break;

-      /* Following commands are never used by FatFs module */
+      // The following commands are never used by FatFs module

-      case MMC_GET_TYPE:    /* Get MMC/SDC type (BYTE) */
+      case MMC_GET_TYPE:    // Get MMC/SDC type (BYTE)
        *ptr = CardType;
        res = RES_OK;
        break;

-      case MMC_GET_CSD:   /* Read CSD (16 bytes) */
-        if (send_cmd(CMD9, 0) == 0 && rcvr_datablock(ptr, 16)) {  /* READ_CSD */
+      case MMC_GET_CSD:     // Read CSD (16 bytes)
+        if (send_cmd(CMD9, 0) == 0 && rcvr_datablock(ptr, 16)) {
          res = RES_OK;
        }
        break;

-      case MMC_GET_CID:   /* Read CID (16 bytes) */
-        if (send_cmd(CMD10, 0) == 0 && rcvr_datablock(ptr, 16)) { /* READ_CID */
+      case MMC_GET_CID:     // Read CID (16 bytes)
+        if (send_cmd(CMD10, 0) == 0 && rcvr_datablock(ptr, 16)) {
          res = RES_OK;
        }
        break;

-      case MMC_GET_OCR:   /* Read OCR (4 bytes) */
-        if (send_cmd(CMD58, 0) == 0) {  /* READ_OCR */
+      case MMC_GET_OCR:     // Read OCR (4 bytes)
+        if (send_cmd(CMD58, 0) == 0) {
          for (n = 4; n; n--) *ptr++ = xchg_spi(0xFF);
          res = RES_OK;
        }
        break;

-      case MMC_GET_SDSTAT:  /* Read SD status (64 bytes) */
-        if (send_cmd(ACMD13, 0) == 0) { /* SD_STATUS */
+      case MMC_GET_SDSTAT:  // Read SD status (64 bytes)
+        if (send_cmd(ACMD13, 0) == 0) {
          xchg_spi(0xFF);
          if (rcvr_datablock(ptr, 64)) res = RES_OK;
        }
@@ -184,6 +184,10 @@ bool SDIO_WriteBlock(uint32_t blockAddress, const uint8_t *data) {

 inline uint32_t SDIO_GetCardState() { return SDIO_CmdSendStatus(SdCard.RelCardAdd << 16U) ? (SDIO_GetResponse(SDIO_RESP1) >> 9U) & 0x0FU : SDIO_CARD_ERROR; }

+// No F1 board with SDIO + MSC using Maple, that I aware of...
+bool SDIO_IsReady() { return true; }
+uint32_t SDIO_GetCardSize() { return 0; }
+
 // ------------------------
 // SD Commands and Responses
 // ------------------------
@@ -90,12 +90,20 @@ void TFT_SPI::DataTransferBegin(uint16_t DataSize) {
  TFT_CS_L;
 }

+#ifdef TFT_DEFAULT_DRIVER
+  #include "../../../lcd/tft_io/tft_ids.h"
+#endif
+
 uint32_t TFT_SPI::GetID() {
  uint32_t id;
  id = ReadID(LCD_READ_ID);
-
-  if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
+  if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF) {
    id = ReadID(LCD_READ_ID4);
+    #ifdef TFT_DEFAULT_DRIVER
+      if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
+        id = TFT_DEFAULT_DRIVER;
+    #endif
+   }
  return id;
 }

@@ -54,7 +54,7 @@ enum XPTCoordinate : uint8_t {
  XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
 };

-#if !defined(XPT2046_Z1_THRESHOLD)
+#ifndef XPT2046_Z1_THRESHOLD
  #define XPT2046_Z1_THRESHOLD 10
 #endif

@@ -64,4 +64,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -63,4 +63,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -63,4 +63,10 @@ void setup_endstop_interrupts() {
  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
+  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
+  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
+  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
+  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
+  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
+  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
 }
@@ -43,6 +43,8 @@
  #define HAL_PATH(PATH, NAME) XSTR(PATH/ESP32/NAME)
 #elif defined(__PLAT_LINUX__)
  #define HAL_PATH(PATH, NAME) XSTR(PATH/LINUX/NAME)
+#elif defined(__PLAT_NATIVE_SIM__)
+  #define HAL_PATH(PATH, NAME) XSTR(PATH/NATIVE_SIM/NAME)
 #elif defined(__SAMD51__)
  #define HAL_PATH(PATH, NAME) XSTR(PATH/SAMD51/NAME)
 #else
@@ -97,48 +97,70 @@ void calibrate_delay_loop();
  #define DELAY_US(x) DelayCycleFnc((x) * ((F_CPU) / 1000000UL))

 #elif defined(__AVR__)
-
-  #define nop() __asm__ __volatile__("nop;\n\t":::)
-
-  FORCE_INLINE static void __delay_4cycles(uint8_t cy) {
-    __asm__ __volatile__(
-      L("1")
-      A("dec %[cnt]")
-      A("nop")
-      A("brne 1b")
-      : [cnt] "+r"(cy)  // output: +r means input+output
-      :                 // input:
-      : "cc"            // clobbers:
-    );
+  FORCE_INLINE static void __delay_up_to_3c(uint8_t cycles) {
+    switch (cycles) {
+      case 3:
+        __asm__ __volatile__(A("RJMP .+0") A("NOP"));
+        break;
+      case 2:
+        __asm__ __volatile__(A("RJMP .+0"));
+        break;
+      case 1:
+        __asm__ __volatile__(A("NOP"));
+        break;
+    }
  }

  // Delay in cycles
-  FORCE_INLINE static void DELAY_CYCLES(uint16_t x) {
-
-    if (__builtin_constant_p(x)) {
-      #define MAXNOPS 4
-
-      if (x <= (MAXNOPS)) {
-        switch (x) { case 4: nop(); case 3: nop(); case 2: nop(); case 1: nop(); }
+  FORCE_INLINE static void DELAY_CYCLES(uint16_t cycles) {
+    if (__builtin_constant_p(cycles)) {
+      if (cycles <= 3) {
+        __delay_up_to_3c(cycles);
+      }
+      else if (cycles == 4) {
+        __delay_up_to_3c(2);
+        __delay_up_to_3c(2);
      }
      else {
-        const uint32_t rem = (x) % (MAXNOPS);
-        switch (rem) { case 3: nop(); case 2: nop(); case 1: nop(); }
-        if ((x = (x) / (MAXNOPS)))
-          __delay_4cycles(x); // if need more then 4 nop loop is more optimal
-      }
+        cycles -= 1 + 4; // Compensate for the first LDI (1) and the first round (4)
+        __delay_up_to_3c(cycles % 4);

-      #undef MAXNOPS
+        cycles /= 4;
+        // The following code burns [1 + 4 * (rounds+1)] cycles
+        uint16_t dummy;
+        __asm__ __volatile__(
+          // "manually" load counter from constants, otherwise the compiler may optimize this part away
+          A("LDI %A[rounds], %[l]") // 1c
+          A("LDI %B[rounds], %[h]") // 1c (compensating the non branching BRCC)
+          L("1")
+          A("SBIW %[rounds], 1")    // 2c
+          A("BRCC 1b")              // 2c when branching, else 1c (end of loop)
+          : // Outputs ...
+          [rounds] "=w" (dummy) // Restrict to a wo (=) 16 bit register pair (w)
+          : // Inputs ...
+          [l] "M" (cycles%256), // Restrict to 0..255 constant (M)
+          [h] "M" (cycles/256)  // Restrict to 0..255 constant (M)
+          :// Clobbers ...
+          "cc"                  // Indicate we are modifying flags like Carry (cc)
+        );
+      }
+    }
+    else {
+      __asm__ __volatile__(
+        L("1")
+        A("SBIW %[cycles], 4")   // 2c
+        A("BRCC 1b")             // 2c when branching, else 1c (end of loop)
+        : [cycles] "+w" (cycles) // output: Restrict to a rw (+) 16 bit register pair (w)
+        :                        // input: -
+        : "cc"                   // clobbers: We are modifying flags like Carry (cc)
+      );
    }
-    else if ((x >>= 2))
-      __delay_4cycles(x);
  }
-  #undef nop

  // Delay in microseconds
  #define DELAY_US(x) DELAY_CYCLES((x) * ((F_CPU) / 1000000UL))

-#elif defined(__PLAT_LINUX__) || defined(ESP32)
+#elif defined(ESP32) || defined(__PLAT_LINUX__) || defined(__PLAT_NATIVE_SIM__)

  // DELAY_CYCLES specified inside platform

--- a/Show More
+++ b/Show More