BigTreeTech SKR Mini E3 (#14457)

Marlin/src/core/boards.h

@@ -245,12 +245,13 @@
 #define BOARD_STM32F1R                1800  // STM32R Libmaple based STM32F1 controller
 #define BOARD_MALYAN_M200             1801  // STM32C8T6 Libmaple based stm32f1 controller
 #define BOARD_STM3R_MINI              1803  // STM32 Libmaple based stm32f1 controller
-#define BOARD_GTM32_PRO_VB            1805  // STM32f103VET6 controller
+#define BOARD_GTM32_PRO_VB            1805  // STM32F103VET6 controller
 #define BOARD_MORPHEUS                1806  // STM32F103C8/STM32F103CB Libmaple based stm32f1 controller
 #define BOARD_MKS_ROBIN               1808  // MKS Robin / STM32F103ZET6
 #define BOARD_MKS_ROBIN_MINI          1813  // MKS Robin Mini / STM32F103VET6
 #define BOARD_MKS_ROBIN_NANO          1812  // MKS Robin Nano / STM32F103VET6
-#define BOARD_BIGTREE_SKR_MINI_V1_1   1814  // STM32F103RC
+#define BOARD_BIGTREE_SKR_MINI_V1_1   1814  // BigTreeTech SKR Mini v1.1 / STM32F103RC
+#define BOARD_BIGTREE_SKR_MINI_E3     1815  // BigTreeTech SKR Mini E3 / STM32F103RC
 #define BOARD_JGAURORA_A5S_A1         1820  // JGAurora A5S A1 / STM32F103ZET6
 #define BOARD_FYSETC_AIO_II           1890  // FYSETC AIO_II
 #define BOARD_FYSETC_CHEETAH          1891  // FYSETC CHEETAH

Marlin/src/pins/pins.h

@@ -422,6 +422,8 @@
   #include "pins_STM3R_MINI.h"        // STM32F1                                    env:STM32F1
 #elif MB(BIGTREE_SKR_MINI_V1_1)
   #include "pins_BIGTREE_SKR_MINI_V1_1.h" // STM32F1                                env:BIGTREE_SKR_MINI
+#elif MB(BIGTREE_SKR_MINI_E3)
+  #include "pins_BIGTREE_SKR_MINI_E3.h" // STM32F1                                  env:BIGTREE_SKR_MINI
 #elif MB(MALYAN_M200)
   #include "pins_MALYAN_M200.h"       // STM32F1                                    env:malyanm200
 #elif MB(CHITU3D)

Marlin/src/pins/pins_BIGTREE_SKR_MINI_E3.h

@@ -0,0 +1,139 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef TARGET_STM32F1
+  #error "Oops! Select an STM32F1 board in 'Tools > Board.'"
+#endif
+
+#ifndef BOARD_NAME
+  #define BOARD_NAME "BIGTREE SKR MINI E3"
+#endif
+
+// Release PB3/PB4 (E0 STP/DIR) from JTAG pins
+#define DISABLE_JTAG
+
+// Ignore temp readings during develpment.
+//#define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
+
+//
+// Servos
+//
+#define SERVO0_PIN         PA1
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN         PC0
+#define Y_STOP_PIN         PC1
+#define Z_STOP_PIN         PC2
+
+//
+// Z Probe must be this pins
+//
+#define Z_MIN_PROBE_PIN    PC14
+
+//
+// Filament Runout Sensor
+//
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN   PC15
+#endif
+
+//
+// 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
+
+#if HAS_DRIVER(TMC2209)
+  /**
+   * TMC2209 stepper drivers
+   * Hardware serial communication ports.
+   */
+  #define X_HARDWARE_SERIAL  Serial4
+  #define Y_HARDWARE_SERIAL  Serial4
+  #define Z_HARDWARE_SERIAL  Serial4
+  #define E0_HARDWARE_SERIAL Serial4
+#endif
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN         PA0   // Analog Input
+#define TEMP_BED_PIN       PC3   // Analog Input
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN       PC8   // EXTRUDER
+#define HEATER_BED_PIN     PC9   // BED
+#define FAN_PIN            PA8
+
+//
+// USB connect control
+//
+#define USB_CONNECT        PC13
+#define USB_CONNECT_INVERTING false
+
+#define SD_DETECT_PIN      PC4
+
+/**
+ *                 _____
+ *             5V | · · | GND
+ *  (LCD_EN) PB7  | · · | PB8  (LCD_RS)
+ *  (LCD_D4) PB9  | · · | PA10 (BTN_EN2)
+ *          RESET | · · | PA9  (BTN_EN1)
+ * (BTN_ENC) PB6  | · · | PB5  (BEEPER)
+ *                 -----
+ *                 EXP1
+ */
+#if HAS_SPI_LCD
+  #define BEEPER_PIN       PB5
+  #define BTN_ENC          PB6
+
+  #if ENABLED(CR10_STOCKDISPLAY)
+    #define LCD_PINS_RS    PB8
+
+    #define BTN_EN1        PA9
+    #define BTN_EN2        PA10
+
+    #define LCD_PINS_ENABLE PB7
+    #define LCD_PINS_D4    PB9
+
+  #else
+    #error "Only CR10_STOCKDISPLAY is currently supported on the BIGTREE_SKR_MINI_E3."
+  #endif
+
+#endif // HAS_SPI_LCD

Marlin/src/pins/pins_BIGTREE_SKR_MINI_V1_1.h

@@ -48,10 +48,6 @@
 // Steppers
 //
 
-/**
- * TODO: Currently using same Enable pin for all steppers.
- */
-
 #define X_STEP_PIN         PC6
 #define X_DIR_PIN          PC7
 #define X_ENABLE_PIN       PB15

Marlin/src/pins/pins_BIGTREE_SKR_V1.3.h

@@ -169,15 +169,15 @@
 #define FAN_PIN            P2_03
 #define HEATER_BED_PIN     P2_05
 
-/*
+/**
-|               _____                                             _____
+ *              _____                                             _____
-|           NC | · · | GND                                    5V | · · | GND
+ *          NC | · · | GND                                    5V | · · | GND
-|        RESET | · · | 1.31(SD_DETECT)             (LCD_D7) 1.23 | · · | 1.22 (LCD_D6)
+ *       RESET | · · | 1.31(SD_DETECT)             (LCD_D7) 1.23 | · · | 1.22 (LCD_D6)
-|   (MOSI)0.18 | · · | 3.25(BTN_EN2)               (LCD_D5) 1.21 | · · | 1.20 (LCD_D4)
+ *  (MOSI)0.18 | · · | 3.25(BTN_EN2)               (LCD_D5) 1.21 | · · | 1.20 (LCD_D4)
-|  (SD_SS)0.16 | · · | 3.26(BTN_EN1)               (LCD_RS) 1.19 | · · | 1.18 (LCD_EN)
+ * (SD_SS)0.16 | · · | 3.26(BTN_EN1)               (LCD_RS) 1.19 | · · | 1.18 (LCD_EN)
-|    (SCK)0.15 | · · | 0.17(MISO)                 (BTN_ENC) 0.28 | · · | 1.30 (BEEPER)
+ *   (SCK)0.15 | · · | 0.17(MISO)                 (BTN_ENC) 0.28 | · · | 1.30 (BEEPER)
-|               ￣￣                                               ￣￣
+ *              -----                                             -----
-|               EXP2                                              EXP1
+ *              EXP2                                              EXP1
  */
 #if HAS_SPI_LCD
   #define BEEPER_PIN       P1_30   // (37) not 5V tolerant