Blackpill-based custom board

Marlin/src/core/boards.h

@@ -451,6 +451,7 @@
 #define BOARD_MKS_SKIPR_V1            5244  // MKS SKIPR v1.0 all-in-one board (STM32F407VE)
 #define BOARD_TRONXY_V10              5245  // TRONXY V10 (STM32F446ZE)
 #define BOARD_CREALITY_F401RE         5246  // Creality CR4NS200141C13 (STM32F401RE) as found in the Ender-5 S1
+#define BOARD_BLACKPILL_CUSTOM        5247  // Custom board based on STM32F401CDU6.
 
 //
 // ARM Cortex-M7

Marlin/src/pins/pins.h

@@ -792,6 +792,8 @@
   #include "stm32f4/pins_TRONXY_V10.h"          // STM32F4                                env:STM32F446_tronxy
 #elif MB(CREALITY_F401RE)
   #include "stm32f4/pins_CREALITY_F401.h"       // STM32F4                                env:STM32F401RE_creality
+#elif MB(BLACKPILL_CUSTOM)
+  #include "stm32f4/pins_BLACKPILL_CUSTOM.h"    // STM32F4                                env:STM32F401CD_blackpill_stlink
 
 //
 // ARM Cortex M7

Marlin/src/pins/stm32f1/pins_CREALITY_V4.h

@@ -299,11 +299,3 @@
 #define UART4_RX_PIN                        PC11  // default uses sdcard SDIO_D3
 #define UART5_TX_PIN                        PC12  // default uses sdcard SDIO_CK
 #define UART5_RX_PIN                        PD2   // default uses sdcard SDIO_CMD
-
-// SDIO pins
-#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

Marlin/src/pins/stm32f4/pins_BLACKPILL_CUSTOM.h

@@ -0,0 +1,140 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "env_validate.h"
+
+#ifndef BOARD_INFO_NAME
+  #define BOARD_INFO_NAME "Custom Blackpill"
+#endif
+
+#ifndef DEFAULT_MACHINE_NAME
+  #define DEFAULT_MACHINE_NAME "SLA Printer"
+#endif
+
+#define DISABLE_DEBUG                      false  // DISABLE_(DEBUG|JTAG) is not supported for STM32F4.
+#define ALLOW_STM32F4
+#define BOARD_NO_NATIVE_USB
+
+//
+// EEPROM
+//
+#if NO_EEPROM_SELECTED
+  #define IIC_BL24CXX_EEPROM                      // EEPROM on I2C-0
+  //#define SDCARD_EEPROM_EMULATION
+#endif
+
+//
+// Servos
+//
+#if !defined(SERVO0_PIN) && !defined(HAS_PIN_27_BOARD)
+  #define SERVO0_PIN                        PC13  // BLTouch OUT
+#endif
+
+#define LED_PIN                             PC13
+
+//
+// Limit Switches
+//
+#define Z_STOP_PIN                          PA15
+#define X_STOP_PIN                          PA11
+#define Y_STOP_PIN                          PA12
+
+//
+// Filament Runout Sensor
+//
+#define FIL_RUNOUT_PIN                      PB15  // "Pulled-high"
+
+//
+// Steppers
+//
+#define X_STEP_PIN                          PB0
+#define X_DIR_PIN                           PB1
+#define X_ENABLE_PIN                        PB2   // Shared
+
+#define Y_STEP_PIN                          PB3
+#define Y_DIR_PIN                           PB4
+#define Y_ENABLE_PIN                X_ENABLE_PIN
+
+#define Z_STEP_PIN                          PB8
+#define Z_DIR_PIN                           PB5
+#define Z_ENABLE_PIN                X_ENABLE_PIN
+
+#define E0_STEP_PIN                         PB9
+#define E0_DIR_PIN                          PB10
+#define E0_ENABLE_PIN               X_ENABLE_PIN
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN                          PA0   // TH1
+#define TEMP_BED_PIN                        PA1   // TB1
+
+//
+// Heaters / Fans
+//
+#define HEATER_BED_PIN                      PA2   // HOT BED
+#define FAN1_PIN                            PA8   // extruder fan
+#define HEATER_0_PIN                        PA3   // HEATER1
+
+//
+// Encoder pins
+//
+#if ENABLED(OLED_PANEL_TINYBOY2)
+#define BTN_EN1                             PB12
+#define BTN_EN2                             PB13
+#define BTN_ENC                             PB14
+#define BEEPER_PIN                          PC15
+#endif
+
+//
+// SD Card
+//
+#define ONBOARD_SPI_DEVICE                     1
+// #define ONBOARD_SD_CS_PIN                   PA4   // SDSS
+
+#define SD_DETECT_PIN                       -1
+#define SDCARD_CONNECTION                ONBOARD
+//#define SDIO_SUPPORT
+#define NO_SD_HOST_DRIVE                          // This board's SD is only seen by the printer
+
+#if SD_CONNECTION_IS(ONBOARD)                      
+  #define SDSS                              PA4
+  #define SD_SCK_PIN                        PA5
+  #define SD_MISO_PIN                       PA6
+  #define SD_MOSI_PIN                       PA7
+#endif
+
+// Pins for documentation and sanity checks only.
+// Changing these will not change the pin they are on.
+
+// Hardware UART pins
+#define UART1_TX_PIN                        PA9   // default uses CH340 RX
+#define UART1_RX_PIN                        PA10  // default uses CH340 TX
+#define UART2_TX_PIN                        PA2   // default uses HEATER_BED_PIN
+#define UART2_RX_PIN                        PA3   // not connected
+#define UART3_TX_PIN                        PB10  // default uses LCD connector
+#define UART3_RX_PIN                        PB11  // default uses LCD connector
+#define UART4_TX_PIN                        PC10  // default uses sdcard SDIO_D2
+#define UART4_RX_PIN                        PC11  // default uses sdcard SDIO_D3
+#define UART5_TX_PIN                        PC12  // default uses sdcard SDIO_CK
+#define UART5_RX_PIN                        PD2   // default uses sdcard SDIO_CMD

Marlin/src/pins/stm32f4/pins_TRONXY_V10.h

@@ -255,10 +255,3 @@
 #define SD_DETECT_PIN                       -1    // PF0, but not connected
 #define SDIO_CLOCK                       4500000
 #define SDIO_READ_RETRIES                     16
-
-#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

ini/stm32f4.ini

@@ -772,3 +772,13 @@ build_flags                 = ${stm32_variant.build_flags}
                               -DSTM32F4xx
 build_unflags               = ${stm32_variant.build_unflags} -fno-rtti
                               -DUSBCON -DUSBD_USE_CDC
+
+#
+# Blackpill
+#
+[env:STM32F401CD_blackpill_stlink]
+platform        = ${common_stm32.platform}
+extends         = common_stm32
+board           = blackpill_f401cc
+upload_protocol = stlink
+monitor_speed   = 115200