Fix serials available on SKR Pro 1.1 (#16439)

buildroot/share/PlatformIO/variants/BIGTREE_SKR_PRO_1v1/PeripheralPins.c

   {PE_6,  TIM9,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 2, 0)}, // TIM9_CH2    FAN2
   {PC_9,  TIM8,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 4, 0)}, // TIM8_CH4    EXTENSION1-4
 
-  //probably unused on SKR-Pro. confirmation needed, please.
+  /**
+   * Unused by specifications on SKR-Pro.
+   * Uncomment the corresponding line if you want to have HardwarePWM on some pins.
+   * WARNING: check timers' usage first to avoid conflicts.
+   * If you don't know what you're doing leave things as they are or you WILL break something (including hardware)
+   * If you alter this section DO NOT report bugs to Marlin team since they are most likely caused by you. Thank you.
+   */
   //{PA_0,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 1, 0)}, // TIM2_CH1
   //{PA_0,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 1, 0)}, // TIM5_CH1
-  //{PA_1,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 2, 0)}, // TIM2_CH2 is bltouch analog?
+  //{PA_1,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 2, 0)}, // TIM2_CH2
   //{PA_1,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 2, 0)}, // TIM5_CH2
-  //{PA_2,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 3, 0)}, // TIM2_CH3 is bltouch analog?
+  //{PA_2,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 3, 0)}, // TIM2_CH3
   //{PA_2,  TIM5,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 3, 0)}, // TIM5_CH3
   //{PA_2,  TIM9,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 1, 0)}, // TIM9_CH1
   //{PA_3,  TIM2,   STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 4, 0)}, // TIM2_CH4
 
 #ifdef HAL_UART_MODULE_ENABLED
 const PinMap PinMap_UART_TX[] = {
-  {PA_0,  UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
-  {PA_2,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
   {PA_9,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_6,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PC_6,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
-  {PC_10, UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
-  {PC_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PC_12, UART5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
-  {PD_5,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
   {PD_8,  USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  {PC_6,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
   #if STM32F4X_PIN_NUM >= 144  //144 pins mcu, 114 gpio
-    {PG_14, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_14, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
   #endif
+  //{PB_6,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+  //{PA_2,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PD_5,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PB_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PC_10, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PA_0,  UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+  //{PC_10, UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+  //{PC_12, UART5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
   {NC,    NP,    0}
 };
 
 const PinMap PinMap_UART_RX[] = {
-  {PA_1,  UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
-  {PA_3,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
   {PA_10, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_7,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PC_7,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
-  {PC_11, UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
-  {PC_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PD_2,  UART5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
-  {PD_6,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
   {PD_9,  USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  {PC_7,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+  //{PA_1,  UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+  //{PA_3,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PB_7,  USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+  //{PB_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PC_11, UART4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+  //{PC_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PD_2,  UART5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
+  //{PD_6,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
   #if STM32F4X_PIN_NUM >= 144  //144 pins mcu, 114 gpio
-    {PG_9,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_9,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
   #endif
   {NC,    NP,    0}
 };
 
 const PinMap PinMap_UART_RTS[] = {
-  {PA_1,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
-  {PA_12, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_14, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PD_4,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
-  {PD_12, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PA_1,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PA_12, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+  //{PB_14, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PD_4,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PD_12, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
   #if STM32F4X_PIN_NUM >= 144  //144 pins mcu, 114 gpio
-    {PG_8,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
-    {PG_12, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_8,  USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_12, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
   #endif
   {NC,    NP,    0}
 };
 
 const PinMap PinMap_UART_CTS[] = {
-  {PA_0,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
-  {PA_11, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
-  {PB_13, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
-  {PD_3,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
-  {PD_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PA_0,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PA_11, USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+  //{PB_13, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+  //{PD_3,  USART2,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+  //{PD_11, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
   #if STM32F4X_PIN_NUM >= 144  //144 pins mcu, 114 gpio
-    {PG_13, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
-    {PG_15, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_13, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+    //{PG_15, USART6,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
   #endif
   {NC,    NP,    0}
 };

buildroot/share/PlatformIO/variants/BIGTREE_SKR_PRO_1v1/variant.h

 //#define PWM_RESOLUTION          8
 //#define PWM_MAX_DUTY_CYCLE      255
 
+// On-board LED pin number
+#define LED_BUILTIN             PA7
+//#define LED_GREEN             LED_BUILTIN   should be defined here but omitted to avoid redefinition in SailfishRGB_LED
+
 // Below SPI and I2C definitions already done in the core
 // Could be redefined here if differs from the default one
 // SPI Definitions
 #define TIMER_SERVO             TIM6  //TODO: advanced-control timers don't work
 
 // UART Definitions
-// Define here Serial instance number to map on Serial generic name
-#define SERIAL_UART_INSTANCE    1 //ex: 2 for Serial2 (USART2)
+//#define ENABLE_HWSERIAL1        done automatically by the #define SERIAL_UART_INSTANCE below
+#define ENABLE_HWSERIAL3
+#define ENABLE_HWSERIAL6
+
+// Define here Serial instance number to map on Serial generic name (if not already used by SerialUSB)
+#define SERIAL_UART_INSTANCE    1 //1 for Serial = Serial1 (USART1)
+
 // DEBUG_UART could be redefined to print on another instance than 'Serial'
 //#define DEBUG_UART              ((USART_TypeDef *) U(S)ARTX) // ex: USART3
 // DEBUG_UART baudrate, default: 9600 if not defined
 #define PIN_SERIAL_RX           PA10
 #define PIN_SERIAL_TX           PA9
 
+// Optional PIN_SERIALn_RX and PIN_SERIALn_TX where 'n' is the U(S)ART number
+// Used when user instanciate a hardware Serial using its peripheral name.
+// Example: HardwareSerial mySerial(USART3);
+// will use PIN_SERIAL3_RX and PIN_SERIAL3_TX if defined.
+#define PIN_SERIAL1_RX          PA10
+#define PIN_SERIAL1_TX          PA9
+#define PIN_SERIAL3_RX          PD9
+#define PIN_SERIAL3_TX          PD8
+#define PIN_SERIAL6_RX          PC7
+#define PIN_SERIAL6_TX          PC6
+//#define PIN_SERIALLP1_RX        x // For LPUART1 RX
+//#define PIN_SERIALLP1_TX        x // For LPUART1 TX
+
 #ifdef __cplusplus
 } // extern "C"
 #endif
 //
 // 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
+#define SERIAL_PORT_MONITOR         Serial
+#define SERIAL_PORT_HARDWARE        Serial1
+#define SERIAL_PORT_HARDWARE_OPEN   Serial3
+#define SERIAL_PORT_HARDWARE_OPEN1  Serial6
 #endif

platformio.ini

 extra_scripts = pre:buildroot/share/PlatformIO/scripts/common-cxxflags.py
 build_flags = -fmax-errors=5 -g -D__MARLIN_FIRMWARE__ -fmerge-all-constants
 lib_deps =
+  LiquidCrystal
+  TMCStepper@>=0.6.1,<1.0.0
+  Adafruit NeoPixel
   U8glib-HAL=https://github.com/MarlinFirmware/U8glib-HAL/archive/bugfix.zip
-  LiquidCrystal@1.3.4
-  TMCStepper@>=0.5.2,<1.0.0
-  Adafruit NeoPixel@1.2.5
   Adafruit_MAX31865=https://github.com/adafruit/Adafruit_MAX31865/archive/master.zip
   LiquidTWI2=https://github.com/lincomatic/LiquidTWI2/archive/master.zip
   Arduino-L6470=https://github.com/ameyer/Arduino-L6470/archive/dev.zip
 build_flags       = ${common.build_flags}
   -DUSBCON -DUSBD_USE_CDC -DUSBD_VID=0x0483 -DUSB_PRODUCT=\"STM32F407ZG\"
   -DTARGET_STM32F4 -DSTM32F407_5ZX -DVECT_TAB_OFFSET=0x8000
-  -DHAVE_HWSERIAL6
   -IMarlin/src/HAL/HAL_STM32
 build_unflags     = -std=gnu++11
 extra_scripts     = pre:buildroot/share/PlatformIO/scripts/generic_create_variant.py
-lib_deps          =
-  U8glib-HAL=https://github.com/MarlinFirmware/U8glib-HAL/archive/bugfix.zip
-  LiquidCrystal
-  TMCStepper@>=0.5.2,<1.0.0
-  Adafruit NeoPixel
-  LiquidTWI2=https://github.com/lincomatic/LiquidTWI2/archive/master.zip
-  Arduino-L6470=https://github.com/ameyer/Arduino-L6470/archive/dev.zip
 lib_ignore        = SoftwareSerial, SoftwareSerialM
 src_filter        = ${common.default_src_filter} +<src/HAL/HAL_STM32>
+#upload_protocol   = stlink
+#upload_command    = "$PROJECT_PACKAGES_DIR/tool-stm32duino/stlink/ST-LINK_CLI.exe" -c SWD -P "$BUILD_DIR/firmware.bin" 0x8008000 -Rst -Run
+debug_tool        = stlink
+debug_init_break  =
 
 #
 # BigTreeTech BTT002 (STM32F407VET6 ARM Cortex-M4)