BTT SKR Mini E3 for HAL/STM32 (#21488)

.github/workflows/test-builds.yml

@@ -72,6 +72,7 @@ jobs:
 
         # STM32 (ST) Environments
 
+        - STM32F103RC_btt_stm32
         - STM32F407VE_black
         - STM32F401VE_STEVAL
         - BIGTREE_BTT002

Marlin/src/HAL/STM32/HAL.cpp

@@ -96,6 +96,12 @@ void HAL_init() {
   #if HAS_SD_HOST_DRIVE
     MSC_SD_init();                         // Enable USB SD card access
   #endif
+
+  #if PIN_EXISTS(USB_CONNECT)
+    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
 }
 
 // HAL idle task

Marlin/src/HAL/STM32F1/HAL.cpp

@@ -293,7 +293,7 @@ void HAL_init() {
   #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);
+    WRITE(USB_CONNECT_PIN, USB_CONNECT_INVERTING);
   #endif
   TERN_(POSTMORTEM_DEBUGGING, install_min_serial());    // Install the minimal serial handler
 }

Marlin/src/pins/pins.h

@@ -511,15 +511,15 @@
 #elif MB(MKS_ROBIN_E3P)
   #include "stm32f1/pins_MKS_ROBIN_E3P.h"       // STM32F1                                env:mks_robin_e3p
 #elif MB(BTT_SKR_MINI_V1_1)
-  #include "stm32f1/pins_BTT_SKR_MINI_V1_1.h"   // STM32F1                                env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
+  #include "stm32f1/pins_BTT_SKR_MINI_V1_1.h"   // STM32F1                                env:STM32F103RC_btt_stm32 env:STM32F103RC_btt_512K_stm32 env:STM32F103RC_btt_USB_stm32 env:STM32F103RC_btt_512K_USB_stm32 env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_E3_V1_0)
-  #include "stm32f1/pins_BTT_SKR_MINI_E3_V1_0.h"  // STM32F1                              env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
+  #include "stm32f1/pins_BTT_SKR_MINI_E3_V1_0.h"  // STM32F1                              env:STM32F103RC_btt_stm32 env:STM32F103RC_btt_512K_stm32 env:STM32F103RC_btt_USB_stm32 env:STM32F103RC_btt_512K_USB_stm32 env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_E3_V1_2)
-  #include "stm32f1/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                              env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
+  #include "stm32f1/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                              env:STM32F103RC_btt_stm32 env:STM32F103RC_btt_512K_stm32 env:STM32F103RC_btt_USB_stm32 env:STM32F103RC_btt_512K_USB_stm32 env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_E3_V2_0)
-  #include "stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h"  // STM32F1                              env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
+  #include "stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h"  // STM32F1                              env:STM32F103RC_btt_stm32 env:STM32F103RC_btt_512K_stm32 env:STM32F103RC_btt_USB_stm32 env:STM32F103RC_btt_512K_USB_stm32 env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_MZ_V1_0)
-  #include "stm32f1/pins_BTT_SKR_MINI_MZ_V1_0.h"  // STM32F1                              env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
+  #include "stm32f1/pins_BTT_SKR_MINI_MZ_V1_0.h"  // STM32F1                              env:STM32F103RC_btt_stm32 env:STM32F103RC_btt_512K_stm32 env:STM32F103RC_btt_USB_stm32 env:STM32F103RC_btt_512K_USB_stm32 env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_E3_DIP)
   #include "stm32f1/pins_BTT_SKR_E3_DIP.h"      // STM32F1                                env:STM32F103RE_btt env:STM32F103RE_btt_USB env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_CR6)

Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_common.h

@@ -21,7 +21,7 @@
  */
 #pragma once
 
-#if NOT_TARGET(TARGET_STM32F1)
+#if NOT_TARGET(__STM32F1__, STM32F1)
   #error "Oops! Select an STM32F1 board in 'Tools > Board.'"
 #endif
 
@@ -279,5 +279,14 @@
   #error "SD CUSTOM_CABLE is not compatible with SKR Mini E3."
 #endif
 
-#define ONBOARD_SPI_DEVICE                     1  // SPI1
+#define ONBOARD_SPI_DEVICE                     1  // SPI1 -> used only by HAL/STM32F1...
 #define ONBOARD_SD_CS_PIN                   PA4   // Chip select for "System" SD card
+
+#define CUSTOM_SPI_PINS                           // TODO: needed because is the only way to set SPI for SD on STM32 (for now)
+#if ENABLED(CUSTOM_SPI_PINS)
+  #define ENABLE_SPI1
+  #define SDSS                              ONBOARD_SD_CS_PIN
+  #define SD_SCK_PIN                        PA5
+  #define SD_MISO_PIN                       PA6
+  #define SD_MOSI_PIN                       PA7
+#endif

buildroot/share/PlatformIO/scripts/stm32_bootloader.py

@@ -19,9 +19,12 @@ def noencrypt(source, target, env):
 #
 if 'offset' in board.get("build").keys():
 	LD_FLASH_OFFSET = board.get("build.offset")
-
 	marlin.relocate_vtab(LD_FLASH_OFFSET)
 
+	# Flash size
+	maximum_flash_size = int(board.get("upload.maximum_size") / 1024)
+	marlin.replace_define('STM32_FLASH_SIZE', maximum_flash_size)
+
 	# Get upload.maximum_ram_size (defined by /buildroot/share/PlatformIO/boards/VARIOUS.json)
 	maximum_ram_size = board.get("upload.maximum_ram_size")
 
@@ -35,6 +38,6 @@ if 'offset' in board.get("build").keys():
 # Only copy the file if there's no encrypt
 #
 board_keys = board.get("build").keys()
-if 'firmware' in board_keys and not 'encrypt' in board_keys:
+if 'firmware' in board_keys and ('encrypt' not in board_keys or board.get("build.encrypt") == 'No'):
 	import marlin
 	marlin.add_post_action(noencrypt)

buildroot/share/PlatformIO/variants/MARLIN_F103Rx/PeripheralPins.c

@@ -0,0 +1,423 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2020, STMicroelectronics
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ *******************************************************************************
+ * Automatically generated from STM32F103R(F-G)Tx.xml
+ */
+#include "Arduino.h"
+#include "PeripheralPins.h"
+
+/* =====
+ * Note: Commented lines are alternative possibilities which are not used per default.
+ *       If you change them, you will have to know what you do
+ * =====
+ */
+
+//*** ADC ***
+
+#ifdef HAL_ADC_MODULE_ENABLED
+WEAK const PinMap PinMap_ADC[] = {
+  {PA_0,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC1_IN0
+  // {PA_0,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC2_IN0
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_0,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC3_IN0
+#endif
+  {PA_1,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC1_IN1
+  // {PA_1,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC2_IN1
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_1,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC3_IN1
+#endif
+  {PA_2,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC1_IN2
+  // {PA_2,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC2_IN2
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_2,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC3_IN2
+#endif
+  {PA_3,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC1_IN3
+  // {PA_3,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC2_IN3
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_3,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC3_IN3
+#endif
+  {PA_4,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC1_IN4
+  // {PA_4,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC2_IN4
+  {PA_5,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC1_IN5
+  // {PA_5,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC2_IN5
+  {PA_6,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC1_IN6
+  // {PA_6,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC2_IN6
+  {PA_7,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC1_IN7
+  // {PA_7,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC2_IN7
+  {PB_0,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC1_IN8
+  // {PB_0,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC2_IN8
+  {PB_1,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC1_IN9
+  // {PB_1,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC2_IN9
+  {PC_0,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 10, 0)}, // ADC1_IN10
+  // {PC_0,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 10, 0)}, // ADC2_IN10
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_0,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 10, 0)}, // ADC3_IN10
+#endif
+  {PC_1,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 11, 0)}, // ADC1_IN11
+  // {PC_1,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 11, 0)}, // ADC2_IN11
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_1,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 11, 0)}, // ADC3_IN11
+#endif
+  {PC_2,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 12, 0)}, // ADC1_IN12
+  // {PC_2,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 12, 0)}, // ADC2_IN12
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_2,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 12, 0)}, // ADC3_IN12
+#endif
+  {PC_3,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC1_IN13
+  // {PC_3,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC2_IN13
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_3,  ADC3,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC3_IN13
+#endif
+  {PC_4,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC1_IN14
+  // {PC_4,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC2_IN14
+  {PC_5,  ADC1,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC1_IN15
+  // {PC_5,  ADC2,  STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC2_IN15
+  {NC,    NP,    0}
+};
+#endif
+
+//*** DAC ***
+
+#if defined(STM32F103xE) || defined(STM32F103xG)
+#ifdef HAL_DAC_MODULE_ENABLED
+WEAK const PinMap PinMap_DAC[] = {
+  {PA_4,  DAC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // DAC_OUT1
+  {PA_5,  DAC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // DAC_OUT2
+  {NC,    NP,    0}
+};
+#endif
+#endif
+
+//*** I2C ***
+
+#ifdef HAL_I2C_MODULE_ENABLED
+WEAK const PinMap PinMap_I2C_SDA[] = {
+  {PB_7,  I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},
+  {PB_9,  I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_I2C1_ENABLE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_11, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_I2C_MODULE_ENABLED
+WEAK const PinMap PinMap_I2C_SCL[] = {
+  {PB_6,  I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},
+  {PB_8,  I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_I2C1_ENABLE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_10, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+//*** PWM ***
+
+#ifdef HAL_TIM_MODULE_ENABLED
+WEAK const PinMap PinMap_PWM[] = {
+  {PA_0,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM2_CH1
+  // {PA_0,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_2, 1, 0)}, // TIM2_CH1
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_0,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM5_CH1
+#endif
+  {PA_1,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM2_CH2
+  // {PA_1,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_2, 2, 0)}, // TIM2_CH2
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_1,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM5_CH2
+#endif
+  {PA_2,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM2_CH3
+  // {PA_2,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_1, 3, 0)}, // TIM2_CH3
+#if defined(STM32F103xG)
+  // {PA_2,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM5_CH3
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PA_2,  TIM9,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM9_CH1
+#endif
+  // {PA_3,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_1, 4, 0)}, // TIM2_CH4
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PA_3,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM5_CH4
+#else
+  {PA_3,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM2_CH4
+#endif
+#if defined(STM32F103xG)
+  // {PA_3,  TIM9,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM9_CH2
+#endif
+  {PA_6,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM3_CH1
+#if defined(STM32F103xG)
+  // {PA_6,  TIM13,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM13_CH1
+#endif
+  // {PA_7,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM3_CH2
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PA_7,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 1)}, // TIM8_CH1N
+#else
+  {PA_7,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 1, 1)}, // TIM1_CH1N
+#endif
+#if defined(STM32F103xG)
+  // {PA_7,  TIM14,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM14_CH1
+#endif
+  {PA_8,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM1_CH1
+  // {PA_8,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 1, 0)}, // TIM1_CH1
+  {PA_9,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM1_CH2
+  // {PA_9,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 2, 0)}, // TIM1_CH2
+  {PA_10, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM1_CH3
+  // {PA_10, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 3, 0)}, // TIM1_CH3
+  {PA_11, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM1_CH4
+  // {PA_11, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 4, 0)}, // TIM1_CH4
+  {PA_15, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_1, 1, 0)}, // TIM2_CH1
+  // {PA_15, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_ENABLE, 1, 0)}, // TIM2_CH1
+  // {PB_0,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 2, 1)}, // TIM1_CH2N
+  {PB_0,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM3_CH3
+  // {PB_0,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_PARTIAL, 3, 0)}, // TIM3_CH3
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PB_0,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 1)}, // TIM8_CH2N
+#endif
+  {PB_1,  TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM1_PARTIAL, 3, 1)}, // TIM1_CH3N
+  // {PB_1,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM3_CH4
+  // {PB_1,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_PARTIAL, 4, 0)}, // TIM3_CH4
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PB_1,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 1)}, // TIM8_CH3N
+#endif
+  {PB_3,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_1, 2, 0)}, // TIM2_CH2
+  // {PB_3,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_ENABLE, 2, 0)}, // TIM2_CH2
+  {PB_4,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_PARTIAL, 1, 0)}, // TIM3_CH1
+  {PB_5,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_PARTIAL, 2, 0)}, // TIM3_CH2
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_6,  TIM4,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM4_CH1
+  {PB_7,  TIM4,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM4_CH2
+  {PB_8,  TIM4,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM4_CH3
+  {PB_9,  TIM4,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM4_CH4
+#endif
+#if defined(STM32F103xG)
+  // {PB_8,  TIM10,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM10_CH1
+#endif
+#if defined(STM32F103xG)
+  // {PB_9,  TIM11,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM11_CH1
+#endif
+  {PB_10, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_2, 3, 0)}, // TIM2_CH3
+  // {PB_10, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_ENABLE, 3, 0)}, // TIM2_CH3
+  {PB_11, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_PARTIAL_2, 4, 0)}, // TIM2_CH4
+  // {PB_11, TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM2_ENABLE, 4, 0)}, // TIM2_CH4
+  {PB_13, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 1)}, // TIM1_CH1N
+  {PB_14, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 1)}, // TIM1_CH2N
+#if defined(STM32F103xG)
+  // {PB_14, TIM12,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM12_CH1
+#endif
+  {PB_15, TIM1,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 1)}, // TIM1_CH3N
+#if defined(STM32F103xG)
+  // {PB_15, TIM12,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM12_CH2
+#endif
+  {PC_6,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_ENABLE, 1, 0)}, // TIM3_CH1
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_6,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 1, 0)}, // TIM8_CH1
+#endif
+  {PC_7,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_ENABLE, 2, 0)}, // TIM3_CH2
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_7,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 2, 0)}, // TIM8_CH2
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PC_8,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 3, 0)}, // TIM8_CH3
+#else
+  {PC_8,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_ENABLE, 3, 0)}, // TIM3_CH3
+#endif
+  {PC_9,  TIM3,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_TIM3_ENABLE, 4, 0)}, // TIM3_CH4
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  // {PC_9,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE, 4, 0)}, // TIM8_CH4
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+//*** SERIAL ***
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_TX[] = {
+  {PA_2,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PA_9,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PB_6,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART1_ENABLE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PC_10, UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+#if defined(STM32F103xB)
+  {PC_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART3_PARTIAL)},
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PC_12, UART5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_RX[] = {
+  {PA_3,  USART2,  STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_NONE)},
+  {PA_10, USART1,  STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_NONE)},
+  {PB_7,  USART1,  STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_USART1_ENABLE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_11, USART3,  STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_NONE)},
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PC_11, UART4,   STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_NONE)},
+#endif
+#if defined(STM32F103xB)
+  {PC_11, USART3,  STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_USART3_PARTIAL)},
+#endif
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PD_2,  UART5,   STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_RTS[] = {
+  {PA_1,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PA_12, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_14, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PB_14, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART3_PARTIAL)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_UART_MODULE_ENABLED
+WEAK const PinMap PinMap_UART_CTS[] = {
+  {PA_0,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PA_11, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_13, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+  {PB_13, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART3_PARTIAL)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+//*** SPI ***
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_MOSI[] = {
+  {PA_7,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_5,  SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#else
+  {PB_5,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_SPI1_ENABLE)},
+#endif
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_15, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_MISO[] = {
+  {PA_6,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_4,  SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#else
+  {PB_4,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_SPI1_ENABLE)},
+#endif
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_14, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_SCLK[] = {
+  {PA_5,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_3,  SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#else
+  {PB_3,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_SPI1_ENABLE)},
+#endif
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_13, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_SPI_MODULE_ENABLED
+WEAK const PinMap PinMap_SPI_SSEL[] = {
+  {PA_4,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#if defined(STM32F103xE) || defined(STM32F103xG)
+  {PA_15, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#else
+  {PA_15, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_SPI1_ENABLE)},
+#endif
+#if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
+  {PB_12, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)},
+#endif
+  {NC,    NP,    0}
+};
+#endif
+
+//*** CAN ***
+
+#ifdef HAL_CAN_MODULE_ENABLED
+WEAK const PinMap PinMap_CAN_RD[] = {
+  {PA_11, CAN1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, AFIO_NONE)},
+  {PB_8,  CAN1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, AFIO_CAN1_2)},
+  {NC,    NP,    0}
+};
+#endif
+
+#ifdef HAL_CAN_MODULE_ENABLED
+WEAK const PinMap PinMap_CAN_TD[] = {
+  {PA_12, CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_NONE)},
+  {PB_9,  CAN1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_CAN1_2)},
+  {NC,    NP,    0}
+};
+#endif
+
+//*** No ETHERNET ***
+
+//*** No QUADSPI ***
+
+//*** USB ***
+
+#ifdef HAL_PCD_MODULE_ENABLED
+WEAK const PinMap PinMap_USB[] = {
+  {PA_11, USB, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, AFIO_NONE)}, // USB_DM
+  {PA_12, USB, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, AFIO_NONE)}, // USB_DP
+  {NC,    NP,    0}
+};
+#endif
+
+//*** No USB_OTG_FS ***
+
+//*** No USB_OTG_HS ***
+
+//*** SD ***
+
+#if defined(STM32F103xE) || defined(STM32F103xG)
+#ifdef HAL_SD_MODULE_ENABLED
+WEAK const PinMap PinMap_SD[] = {
+  {PB_8,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D4
+  {PB_9,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D5
+  {PC_6,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D6
+  {PC_7,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D7
+  {PC_8,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D0
+  {PC_9,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D1
+  {PC_10, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D2
+  {PC_11, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_NONE)}, // SDIO_D3
+  {PC_12, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_NONE)}, // SDIO_CK
+  {PD_2,  SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_NONE)}, // SDIO_CMD
+  {NC,    NP,    0}
+};
+#endif
+#endif

buildroot/share/PlatformIO/variants/MARLIN_F103Rx/PinNamesVar.h

@@ -0,0 +1,30 @@
+/* SYS_WKUP */
+#ifdef PWR_WAKEUP_PIN1
+  SYS_WKUP1 = PA_0,
+#endif
+#ifdef PWR_WAKEUP_PIN2
+  SYS_WKUP2 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN3
+  SYS_WKUP3 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN4
+  SYS_WKUP4 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN5
+  SYS_WKUP5 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN6
+  SYS_WKUP6 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN7
+  SYS_WKUP7 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN8
+  SYS_WKUP8 = NC,
+#endif
+/* USB */
+#ifdef USBCON
+  USB_DM = PA_11,
+  USB_DP = PA_12,
+#endif

buildroot/share/PlatformIO/variants/MARLIN_F103Rx/ldscript.ld

@@ -0,0 +1,200 @@
+/*
+******************************************************************************
+**
+
+**  File        : LinkerScript.ld
+**
+**  Author		: Auto-generated by STM32CubeIDE
+**
+**  Abstract    : Linker script for STM32F103R(8/B/C/ETx Device from STM32F1 series
+**                      64/128/256/512Kbytes FLASH
+**                      20/20/48/64Kbytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used.
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is without any warranty
+**                of any kind.
+**
+*****************************************************************************
+** @attention
+**
+** <h2><center>&copy; COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
+**
+** Redistribution and use in source and binary forms, with or without modification,
+** are permitted provided that the following conditions are met:
+**   1. Redistributions of source code must retain the above copyright notice,
+**      this list of conditions and the following disclaimer.
+**   2. 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.
+**   3. Neither the name of STMicroelectronics nor the names of its contributors
+**      may be used to endorse or promote products derived from this software
+**      without specific prior written permission.
+**
+** 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.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = 0x20000000 + LD_MAX_DATA_SIZE;	/* end of "RAM" Ram type memory */
+_Min_Heap_Size = 0x200;      /* required amount of heap  */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+    RAM	(xrw)	: ORIGIN = 0x20000000,	LENGTH = LD_MAX_DATA_SIZE
+    FLASH	(rx)	: ORIGIN = 0x8000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : { 
+  	. = ALIGN(4);
+  	*(.ARM.extab* .gnu.linkonce.armextab.*)
+  	. = ALIGN(4);
+  } >FLASH
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data : 
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+  } >RAM AT> FLASH
+
+  
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss secion */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}
+

buildroot/share/PlatformIO/variants/MARLIN_F103Rx/variant.cpp

@@ -0,0 +1,152 @@
+/*
+  Copyright (c) 2011 Arduino.  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
+*/
+
+#include "pins_arduino.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const PinName digitalPin[] = {
+  PA_0,
+  PA_1,
+  PA_2,
+  PA_3,
+  PA_4,
+  PA_5,
+  PA_6,
+  PA_7,
+  PA_8,
+  PA_9,  // RXD
+  PA_10, // TXD
+  PA_11, // USB D-
+  PA_12, // USB D+
+  PA_13, // JTDI
+  PA_14, // JTCK
+  PA_15,
+  PB_0,
+  PB_1,
+  PB_2,
+  PB_3,  // JTDO
+  PB_4,  // JTRST
+  PB_5,
+  PB_6,
+  PB_7,
+  PB_8,
+  PB_9,
+  PB_10,
+  PB_11,  // LED
+  PB_12,
+  PB_13,
+  PB_14,
+  PB_15,
+  PC_0,
+  PC_1,
+  PC_2,
+  PC_3,
+  PC_4,
+  PC_5,
+  PC_6,
+  PC_7,
+  PC_8,
+  PC_9,
+  PC_10,
+  PC_11,
+  PC_12,
+  PC_13,
+  PC_14,  // OSC32_1
+  PC_15,  // OSC32_2
+  PD_0,   // OSCIN
+  PD_1,   // OSCOUT
+  PD_2
+};
+
+// Analog (Ax) pin number array
+const uint32_t analogInputPin[] = {
+  0,  // A0,  PA0
+  1,  // A1,  PA1
+  2,  // A2,  PA2
+  3,  // A3,  PA3
+  4,  // A4,  PA4
+  5,  // A5,  PA5
+  6,  // A6,  PA6
+  7,  // A7,  PA7
+  16, // A8,  PB0
+  17, // A9,  PB1
+  32, // A10, PC0
+  33, // A11, PC1
+  34, // A12, PC2
+  35, // A13, PC3
+  36, // A14, PC4
+  37  // A15, PC5
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+// ----------------------------------------------------------------------------
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+  * @brief  System Clock Configuration
+  * @param  None
+  * @retval None
+  */
+WEAK void SystemClock_Config(void)
+{
+  RCC_OscInitTypeDef RCC_OscInitStruct = {};
+  RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
+  RCC_PeriphCLKInitTypeDef PeriphClkInit = {};
+
+  /* Initializes the CPU, AHB and APB busses clocks */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+    Error_Handler();
+  }
+  /* Initializes the CPU, AHB and APB busses clocks */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
+                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+    Error_Handler();
+  }
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC | RCC_PERIPHCLK_USB;
+  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
+  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
+    Error_Handler();
+  }
+}
+
+#ifdef __cplusplus
+}
+#endif

buildroot/share/PlatformIO/variants/MARLIN_F103Rx/variant.h

@@ -0,0 +1,161 @@
+/*
+  Copyright (c) 2011 Arduino.  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
+*/
+
+#ifndef _VARIANT_ARDUINO_STM32_
+#define _VARIANT_ARDUINO_STM32_
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+
+// *   = F103R8-B-C-D-E-F-G
+// **  = F103RC-D-E-F-G
+//                  | DIGITAL | ANALOG         | USART                    | TWI       | SPI                   | SPECIAL   |
+//                  |---------|----------------|--------------------------|-----------|-----------------------|-----------|
+#define PA0  PIN_A0  // | 0       | A0             |                          |           |                       |           |
+#define PA1  PIN_A1  // | 1       | A1             |                          |           |                       |           |
+#define PA2  PIN_A2  // | 2       | A2             | USART2_TX                |           |                       |           |
+#define PA3  PIN_A3  // | 2       | A2, DAC_OUT1** | USART2_RX                |           |                       |           |
+#define PA4  PIN_A4  // | 4       | A4, DAC_OUT2** |                          |           | SPI1_SS               |           |
+#define PA5  PIN_A5  // | 5       | A5             |                          |           | SPI1_SCK              |           |
+#define PA6  PIN_A6  // | 6       | A6             |                          |           | SPI1_MISO             |           |
+#define PA7  PIN_A7  // | 7       | A7             |                          |           | SPI1_MOSI             |           |
+#define PA8  8   // | 8       |                |                          |           |                       |           |
+#define PA9  9   // | 9       |                | USART1_TX                |           |                       |           |
+#define PA10 10  // | 10      |                | USART1_RX                |           |                       |           |
+#define PA11 11  // | 11      |                |                          |           |                       | USB_DM    |
+#define PA12 12  // | 12      |                |                          |           |                       | USB_DP    |
+#define PA13 13  // | 13      |                |                          |           |                       | SWD_SWDIO |
+#define PA14 14  // | 14      |                |                          |           |                       | SWD_SWCLK |
+#define PA15 15  // | 15      |                |                          |           | SPI1_SS/SPI3_SS**     |           |
+//                  |---------|----------------|--------------------------|-----------|-----------------------|-----------|
+#define PB0  PIN_A8  // | 16      | A8             |                          |           |                       |           |
+#define PB1  PIN_A9  // | 17      | A9             |                          |           |                       |           |
+#define PB2  18  // | 18      |                |                          |           |                       | BOOT1     |
+#define PB3  19  // | 19      |                |                          |           | SPI1_SCK/SPI3_SCK**   |           |
+#define PB4  20  // | 20      |                |                          |           | SPI1_MISO/SPI3_MISO** |           |
+#define PB5  21  // | 21      |                |                          |           | SPI1_MOSI/SPI3_MOSI** |           |
+#define PB6  22  // | 22      |                | USART1_TX                | TWI1_SCL  |                       |           |
+#define PB7  23  // | 23      |                | USART1_RX                | TWI1_SDA  |                       |           |
+#define PB8  24  // | 24      |                |                          | TWI1_SCL  |                       |           |
+#define PB9  25  // | 25      |                |                          | TWI1_SDA  |                       |           |
+#define PB10 26  // | 26      |                | USART3_TX*               | TWI2_SCL* |                       |           |
+#define PB11 27  // | 27      |                | USART3_RX*               | TWI2_SDA* |                       |           |
+#define PB12 28  // | 28      |                |                          |           | SPI2_SS*              |           |
+#define PB13 29  // | 29      |                |                          |           | SPI2_SCK*             |           |
+#define PB14 30  // | 30      |                |                          |           | SPI2_MISO*            |           |
+#define PB15 31  // | 31      |                |                          |           | SPI2_MOSI*            |           |
+//                  |---------|----------------|--------------------------|-----------|-----------------------|-----------|
+#define PC0  PIN_A10 // | 32      | A10            |                          |           |                       |           |
+#define PC1  PIN_A11 // | 33      | A11            |                          |           |                       |           |
+#define PC2  PIN_A12 // | 34      | A12            |                          |           |                       |           |
+#define PC3  PIN_A13 // | 35      | A13            |                          |           |                       |           |
+#define PC4  PIN_A14 // | 36      | A14            |                          |           |                       |           |
+#define PC5  PIN_A15 // | 37      | A15            |                          |           |                       |           |
+#define PC6  38  // | 38      |                |                          |           |                       |           |
+#define PC7  39  // | 39      |                |                          |           |                       |           |
+#define PC8  40  // | 40      |                |                          |           |                       |           |
+#define PC9  41  // | 41      |                |                          |           |                       |           |
+#define PC10 42  // | 42      |                | USART3_TX*/UART4_TX**    |           |                       |           |
+#define PC11 43  // | 43      |                | USART3_RX*/UART4_RX**    |           |                       |           |
+#define PC12 44  // | 44      |                | UART5_TX**               |           |                       |           |
+#define PC13 45  // | 45      |                |                          |           |                       |           |
+#define PC14 46  // | 46      |                |                          |           |                       | OSC32_IN  |
+#define PC15 47  // | 47      |                |                          |           |                       | OSC32_OUT |
+//                  |---------|----------------|--------------------------|-----------|-----------------------|-----------|
+#define PD0  48  // | 48      |                |                          |           |                       | OSC_IN    |
+#define PD1  49  // | 48      |                |                          |           |                       | OSC_OUT   |
+#define PD2  50  // | 50      |                | UART5_RX**               |           |                       |           |
+//                  |---------|----------------|--------------------------|-----------|-----------------------|-----------|
+
+// This must be a literal
+#define NUM_DIGITAL_PINS        51
+// This must be a literal with a value less than or equal to to MAX_ANALOG_INPUTS
+#define NUM_ANALOG_INPUTS       16
+
+// On-board LED pin number
+#ifndef LED_BUILTIN
+#define LED_BUILTIN             PB11
+#endif
+#define LED_GREEN               LED_BUILTIN
+
+// On-board user button
+#ifndef USER_BTN
+#define USER_BTN                PC13
+#endif
+
+// Override default Arduino configuration
+// SPI Definitions
+#define PIN_SPI_SS              PA4
+#define PIN_SPI_MOSI            PA7
+#define PIN_SPI_MISO            PA6
+#define PIN_SPI_SCK             PA5
+
+// I2C Definitions
+#define PIN_WIRE_SDA            PB7
+#define PIN_WIRE_SCL            PB6
+
+// Timer Definitions
+#ifndef TIMER_TONE
+  #define TIMER_TONE            TIM3
+#endif
+#ifndef TIMER_SERVO
+  #define TIMER_SERVO           TIM2
+#endif
+// UART Definitions
+// Define here Serial instance number to map on Serial generic name
+#define SERIAL_UART_INSTANCE    1
+
+// Default pin used for 'Serial1' instance
+#define PIN_SERIAL_RX           PA10
+#define PIN_SERIAL_TX           PA9
+
+/* Extra HAL modules */
+#if defined(STM32F103xE) || defined(STM32F103xG)
+#define HAL_DAC_MODULE_ENABLED
+#endif
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+/*----------------------------------------------------------------------------
+ *        Arduino objects - C++ only
+ *----------------------------------------------------------------------------*/
+
+#ifdef __cplusplus
+  // These serial port names are intended to allow libraries and architecture-neutral
+  // sketches to automatically default to the correct port name for a particular type
+  // of use.  For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
+  // the first hardware serial port whose RX/TX pins are not dedicated to another use.
+  //
+  // SERIAL_PORT_MONITOR        Port which normally prints to the Arduino Serial Monitor
+  //
+  // SERIAL_PORT_USBVIRTUAL     Port which is USB virtual serial
+  //
+  // SERIAL_PORT_LINUXBRIDGE    Port which connects to a Linux system via Bridge library
+  //
+  // SERIAL_PORT_HARDWARE       Hardware serial port, physical RX & TX pins.
+  //
+  // SERIAL_PORT_HARDWARE_OPEN  Hardware serial ports which are open for use.  Their RX & TX
+  //                            pins are NOT connected to anything by default.
+  #define SERIAL_PORT_MONITOR     Serial
+  #define SERIAL_PORT_HARDWARE    Serial1
+#endif
+
+#endif /* _VARIANT_ARDUINO_STM32_ */

buildroot/tests/STM32F103RC_btt_USB_stm32

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Build tests for STM32F103RC BigTreeTech (SKR Mini v1.1)
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_BTT_SKR_MINI_V1_1 SERIAL_PORT 1 SERIAL_PORT_2 -1
+exec_test $1 $2 "BigTreeTech SKR Mini v1.1 - Basic Configuration" "$3"
+
+# clean up
+restore_configs

buildroot/tests/STM32F103RC_btt_stm32

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+#
+# Build tests for STM32F103RC BigTreeTech (SKR Mini E3)
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_BTT_SKR_MINI_E3_V1_0 SERIAL_PORT 1 SERIAL_PORT_2 -1 \
+        X_DRIVER_TYPE TMC2209 Y_DRIVER_TYPE TMC2209 Z_DRIVER_TYPE TMC2209 E0_DRIVER_TYPE TMC2209
+opt_enable PINS_DEBUGGING Z_IDLE_HEIGHT
+
+exec_test $1 $2 "BigTreeTech SKR Mini E3 1.0 - Basic Config with TMC2209 HW Serial" "$3"
+
+# clean up
+restore_configs

ini/stm32f1.ini

@@ -144,6 +144,56 @@ lib_deps          = ${env:STM32F103RC_btt_512K.lib_deps}
   USBComposite for STM32F1@0.91
 
 #
+# STM32 HAL version of STM32F103RC_btt envs
+#
+
+[env:STM32F103RC_stm32]
+platform             = ${common_stm32.platform}
+extends              = common_stm32
+board                = genericSTM32F103RC
+monitor_speed        = 115200
+board_build.core     = stm32
+board_build.variant  = MARLIN_F103Rx
+board_build.ldscript = ldscript.ld
+extra_scripts        = ${common.extra_scripts}
+  pre:buildroot/share/PlatformIO/scripts/generic_create_variant.py
+  buildroot/share/PlatformIO/scripts/stm32_bootloader.py
+
+[env:STM32F103RC_btt_stm32]
+platform             = ${common_stm32.platform}
+extends              = env:STM32F103RC_stm32
+build_flags          = ${common_stm32.build_flags} -DDEBUG_LEVEL=0 -DTIMER_SERVO=TIM5
+board_build.offset   = 0x7000
+board_build.encrypt  = No
+board_build.firmware = firmware.bin
+board_upload.offset_address = 0x08007000
+
+[env:STM32F103RC_btt_USB_stm32]
+extends           = env:STM32F103RC_btt_stm32
+platform          = ${common_stm32.platform}
+platform_packages = framework-arduinoststm32@https://github.com/rhapsodyv/Arduino_Core_STM32/archive/usb-host-msc-cdc-msc.zip
+build_unflags     = ${common_stm32.build_unflags} -DUSBD_USE_CDC
+build_flags       = ${env:STM32F103RC_btt_stm32.build_flags} ${env:stm32_flash_drive.build_flags}
+  -DUSBCON
+  -DUSE_USBHOST_HS
+  -DUSBD_IRQ_PRIO=5
+  -DUSBD_IRQ_SUBPRIO=6
+  -DUSE_USB_HS_IN_FS
+  -DUSBD_USE_CDC_MSC
+
+[env:STM32F103RC_btt_512K_stm32]
+platform          = ${common_stm32.platform}
+extends           = env:STM32F103RC_btt_stm32
+board_upload.maximum_size = 524288
+build_flags       = ${env:STM32F103RC_btt_stm32.build_flags} -DLD_MAX_DATA_SIZE=524288 -DSTM32_FLASH_SIZE=512
+
+[env:STM32F103RC_btt_512K_USB_stm32]
+platform          = ${common_stm32.platform}
+extends           = env:STM32F103RC_btt_USB_stm32
+board_upload.maximum_size = 524288
+build_flags       = ${env:STM32F103RC_btt_USB_stm32.build_flags} -DLD_MAX_DATA_SIZE=524288 -DSTM32_FLASH_SIZE=512
+
+#
 # STM32F103RE
 #
 [env:STM32F103RE]