Add BTT SKR CR6 board (#20522)

Marlin/src/core/boards.h

@@ -335,6 +335,7 @@
 #define BOARD_FLY_MINI                4042  // FLY MINI (STM32F103RCT6)
 #define BOARD_FLSUN_HISPEED           4043  // FLSUN HiSpeedV1 (STM32F103VET6)
 #define BOARD_BEAST                   4044  // STM32F103RET6 Libmaple-based controller
+#define BOARD_BTT_SKR_CR6             4045  // BigTreeTech SKR CR6 v1.0 (STM32F103RE)
 
 //
 // ARM Cortex-M4F

Marlin/src/pins/pins.h

@@ -542,6 +542,8 @@
   #include "stm32f1/pins_FLSUN_HISPEED.h"       // STM32F1                                env:flsun_hispeed
 #elif MB(BEAST)
   #include "stm32f1/pins_BEAST.h"               // STM32F1                                env:STM32F103RE
+#elif MB(BTT_SKR_CR6)
+  #include "stm32f1/pins_BTT_SKR_CR6.h"         // STM32F1                                env:STM32F103RC_btt_512K_USB
 
 //
 // ARM Cortex-M4F

Marlin/src/pins/stm32f1/pins_BTT_SKR_CR6.h

@@ -0,0 +1,180 @@
+/**
+ * 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/>.
+ *
+ */
+#pragma once
+
+/**
+ * BigTreeTech SKR CR-6 (STM32F103RET6) board pin assignments
+ */
+
+#define DEFAULT_MACHINE_NAME "Creality3D"
+#define BOARD_INFO_NAME "BTT SKR CR-6"
+
+#if NOT_TARGET(__STM32F1__)
+  #error "Oops! Select an STM32F1 board in 'Tools > Board.'"
+#endif
+
+//
+// Release PB4 (Z_STEP_PIN) from JTAG NRST role
+//
+#define DISABLE_DEBUG
+
+//
+// USB connect control
+//
+#define USB_CONNECT_PIN                     PA14
+#define USB_CONNECT_INVERTING              false
+
+//
+// EEPROM
+//
+
+#if NO_EEPROM_SELECTED
+  #define I2C_EEPROM
+#endif
+
+/* I2C */
+#if ENABLED(I2C_EEPROM)
+  #define IIC_EEPROM_SDA                    PB7
+  #define IIC_EEPROM_SCL                    PB6
+
+  #define MARLIN_EEPROM_SIZE              0x1000  // 4KB
+#elif ENABLED(SDCARD_EEPROM_EMULATION)
+  #define MARLIN_EEPROM_SIZE              0x1000  // 4KB
+#endif
+
+#define E2END           (MARLIN_EEPROM_SIZE - 1)  // 2KB
+
+//
+// Limit Switches
+//
+
+#define X_STOP_PIN                          PC0
+#define Y_STOP_PIN                          PC1
+#define Z_STOP_PIN                          PC14  // Endtop or Probe
+
+#define FIL_RUNOUT_PIN                      PC15
+
+//
+// Probe
+//
+#define PROBE_TARE_PIN                      PA1
+#define PROBE_ACTIVATION_SWITCH_PIN         PC2   // Optoswitch to Enable Z Probe
+
+//
+// Steppers
+//
+#define X_ENABLE_PIN                        PB14
+#define X_STEP_PIN                          PB13
+#define X_DIR_PIN                           PB12
+
+#define Y_ENABLE_PIN                        PB11
+#define Y_STEP_PIN                          PB10
+#define Y_DIR_PIN                           PB2
+
+#define Z_ENABLE_PIN                        PB1
+#define Z_STEP_PIN                          PB0
+#define Z_DIR_PIN                           PC5
+
+#define E0_ENABLE_PIN                       PD2
+#define E0_STEP_PIN                         PB3
+#define E0_DIR_PIN                          PB4
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN                          PA0   // TH1
+#define TEMP_BED_PIN                        PC3   // TB1
+
+//
+// Heaters / Fans
+//
+
+#define HEATER_0_PIN                        PC8   // HEATER1
+#define HEATER_BED_PIN                      PC9   // HOT BED
+
+#define FAN_PIN                             PC6   // FAN
+#define FAN_SOFT_PWM
+
+#define CONTROLLER_FAN_PIN                  PC7
+
+//
+// LCD / Controller
+//
+#if ENABLED(CR10_STOCKDISPLAY)
+  #define BTN_ENC                           PA15
+  #define BTN_EN1                           PA9
+  #define BTN_EN2                           PA10
+
+  #define LCD_PINS_RS                       PB8
+  #define LCD_PINS_ENABLE                   PB15
+  #define LCD_PINS_D4                       PB9
+
+  #define BEEPER_PIN                        PB5
+#endif
+
+#if HAS_TMC_UART
+  /**
+   * TMC2209 stepper drivers
+   * Hardware serial communication ports.
+   */
+  #define X_HARDWARE_SERIAL  MSerial4
+  #define Y_HARDWARE_SERIAL  MSerial4
+  #define Z_HARDWARE_SERIAL  MSerial4
+  #define E0_HARDWARE_SERIAL MSerial4
+
+  // Default TMC slave addresses
+  #ifndef X_SLAVE_ADDRESS
+    #define X_SLAVE_ADDRESS  0
+  #endif
+  #ifndef Y_SLAVE_ADDRESS
+    #define Y_SLAVE_ADDRESS  1
+  #endif
+  #ifndef Z_SLAVE_ADDRESS
+    #define Z_SLAVE_ADDRESS  2
+  #endif
+  #ifndef E0_SLAVE_ADDRESS
+    #define E0_SLAVE_ADDRESS 3
+  #endif
+#endif
+
+//
+// SD Card
+//
+
+#define HAS_ONBOARD_SD
+
+#ifndef SDCARD_CONNECTION
+  #define SDCARD_CONNECTION              ONBOARD
+#endif
+
+#if SD_CONNECTION_IS(ONBOARD)
+  #define SD_DETECT_PIN                     PC4
+
+  #define ON_BOARD_SPI_DEVICE                  1  // SPI1
+  #define ONBOARD_SD_CS_PIN                 PA4   // Chip select for "System" SD card
+#endif
+
+//
+// Misc. Functions
+//
+#define LED_CONTROL_PIN                     PA13
+#define NEOPIXEL_PIN                        PA8

buildroot/tests/STM32F103RE_btt_USB-tests

@@ -15,5 +15,17 @@ opt_set SERIAL_PORT 1
 opt_set SERIAL_PORT_2 -1
 exec_test $1 $2 "BigTreeTech SKR E3 DIP v1.0 - Basic Configuration" "$3"
 
+restore_configs
+opt_set MOTHERBOARD BOARD_BTT_SKR_CR6
+opt_set SERIAL_PORT -1
+opt_set SERIAL_PORT_2 2
+opt_set TEMP_SENSOR_BED 1
+opt_enable CR10_STOCKDISPLAY \
+           NOZZLE_AS_PROBE Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN Z_SAFE_HOMING \
+           PROBE_ACTIVATION_SWITCH PROBE_TARE PROBE_TARE_ONLY_WHILE_INACTIVE \
+           PROBING_HEATERS_OFF PREHEAT_BEFORE_PROBING
+opt_disable NOZZLE_TO_PROBE_OFFSET
+exec_test $1 $2 "BigTreeTech SKR CR6 PROBE_ACTIVATION_SWITCH, Probe Tare" "$3"
+
 # clean up
 restore_configs