BTT Motor Expansion for SKR Pro (#20123)

Marlin/src/pins/stm32f4/pins_BTT_SKR_PRO_common.h

@@ -25,6 +25,13 @@
   #error "Oops! Select an STM32F4 board in 'Tools > Board.'"
 #endif
 
+// BigTreeTech driver expansion module https://bit.ly/3ptRRoj
+//#define BTT_MOTOR_EXPANSION
+
+#if BOTH(HAS_WIRED_LCD, BTT_MOTOR_EXPANSION)
+  #error "It's not possible to have both LCD and motor expansion module on EXP1/EXP2."
+#endif
+
 // Use one of these or SDCard-based Emulation will be used
 #if NO_EEPROM_SELECTED
   //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
@@ -247,14 +254,43 @@
   #define SDCARD_CONNECTION                  LCD
 #endif
 
+/**
+ *               -----                                             -----
+ *           NC | 1 2 | GND                                    5V | 1 2 | GND
+ *        RESET | 3 4 | PF12(SD_DETECT)             (LCD_D7)  PG7 | 3 4 | PG6  (LCD_D6)
+ *   (MOSI)PB15 | 5 6   PF11(BTN_EN2)               (LCD_D5)  PG3 | 5 6   PG2  (LCD_D4)
+ *  (SD_SS)PB12 | 7 8 | PG10(BTN_EN1)               (LCD_RS) PD10 | 7 8 | PD11 (LCD_EN)
+ *    (SCK)PB13 | 9 10| PB14(MISO)                 (BTN_ENC)  PA8 | 9 10| PG4  (BEEPER)
+ *               -----                                             -----
+ *               EXP2                                              EXP1
+ */
+
+#define EXPA1_03_PIN                        PG7
+#define EXPA1_04_PIN                        PG6
+#define EXPA1_05_PIN                        PG3
+#define EXPA1_06_PIN                        PG2
+#define EXPA1_07_PIN                        PD10
+#define EXPA1_08_PIN                        PD11
+#define EXPA1_09_PIN                        PA8
+#define EXPA1_10_PIN                        PG4
+
+#define EXPA2_03_PIN                        -1
+#define EXPA2_04_PIN                        PF12
+#define EXPA2_05_PIN                        PB15
+#define EXPA2_06_PIN                        PF11
+#define EXPA2_07_PIN                        PB12
+#define EXPA2_08_PIN                        PG10
+#define EXPA2_09_PIN                        PB13
+#define EXPA2_10_PIN                        PB14
+
 //
 // Onboard SD card
 // Must use soft SPI because Marlin's default hardware SPI is tied to LCD's EXP2
 //
 #if SD_CONNECTION_IS(LCD)
 
-  #define SD_DETECT_PIN                     PF12
-  #define SDSS                              PB12
+  #define SD_DETECT_PIN             EXPA2_04_PIN
+  #define SDSS                      EXPA2_07_PIN
 
 #elif SD_CONNECTION_IS(ONBOARD)
 
@@ -273,16 +309,52 @@
   #error "CUSTOM_CABLE is not a supported SDCARD_CONNECTION for this board"
 #endif
 
-/**
- *               -----                                             -----
- *           NC | · · | GND                                    5V | · · | GND
- *        RESET | · · | PF12(SD_DETECT)             (LCD_D7)  PG7 | · · | PG6  (LCD_D6)
- *   (MOSI)PB15 | · · | PF11(BTN_EN2)               (LCD_D5)  PG3 | · · | PG2  (LCD_D4)
- *  (SD_SS)PB12 | · · | PG10(BTN_EN1)               (LCD_RS) PD10 | · · | PD11 (LCD_EN)
- *    (SCK)PB13 | · · | PB14(MISO)                 (BTN_ENC)  PA8 | · · | PG4  (BEEPER)
- *               -----                                             -----
- *               EXP2                                              EXP1
- */
+#if ENABLED(BTT_MOTOR_EXPANSION)
+  /**
+   *               _____                                      _____
+   *           NC | · · | GND                             NC | · · | GND
+   *           NC | · · | PF12 (M1EN)            (M2EN)  PG7 | · · | PG6  (M3EN)
+   * (M1STP) PB15 | · ·   PF11 (M1DIR)           (M1RX)  PG3 | · ·   PG2  (M1DIAG)
+   * (M2DIR) PB12 | · · | PG10 (M2STP)           (M2RX) PD10 | · · | PD11 (M2DIAG)
+   * (M3DIR) PB13 | · · | PB14 (M3STP)           (M3RX)  PA8 | · · | PG4  (M3DIAG)
+   *               -----                                      -----
+   *               EXP2                                       EXP1
+   */
+
+  // M1 on Driver Expansion Module
+  #define E3_STEP_PIN               EXPA2_05_PIN
+  #define E3_DIR_PIN                EXPA2_06_PIN
+  #define E3_ENABLE_PIN             EXPA2_04_PIN
+  #define E3_DIAG_PIN               EXPA1_06_PIN
+  #define E3_CS_PIN                 EXPA1_05_PIN
+  #if HAS_TMC_UART
+    #define E3_SERIAL_TX_PIN        EXPA1_05_PIN
+    #define E3_SERIAL_RX_PIN        EXPA1_05_PIN
+  #endif
+
+  // M2 on Driver Expansion Module
+  #define E4_STEP_PIN               EXPA2_08_PIN
+  #define E4_DIR_PIN                EXPA2_07_PIN
+  #define E4_ENABLE_PIN             EXPA1_03_PIN
+  #define E4_DIAG_PIN               EXPA1_08_PIN
+  #define E4_CS_PIN                 EXPA1_07_PIN
+  #if HAS_TMC_UART
+    #define E4_SERIAL_TX_PIN        EXPA1_07_PIN
+    #define E4_SERIAL_RX_PIN        EXPA1_07_PIN
+  #endif
+
+  // M3 on Driver Expansion Module
+  #define E5_STEP_PIN               EXPA2_10_PIN
+  #define E5_DIR_PIN                EXPA2_09_PIN
+  #define E5_ENABLE_PIN             EXPA1_04_PIN
+  #define E5_DIAG_PIN               EXPA1_10_PIN
+  #define E5_CS_PIN                 EXPA1_09_PIN
+  #if HAS_TMC_UART
+    #define E5_SERIAL_TX_PIN        EXPA1_09_PIN
+    #define E5_SERIAL_RX_PIN        EXPA1_09_PIN
+  #endif
+
+#endif // BTT_MOTOR_EXPANSION
 
 //
 // LCDs and Controllers
@@ -290,23 +362,23 @@
 #if IS_TFTGLCD_PANEL
 
   #if ENABLED(TFTGLCD_PANEL_SPI)
-    #define TFTGLCD_CS                      PG10
+    #define TFTGLCD_CS              EXPA2_08_PIN
   #endif
 
 #elif HAS_WIRED_LCD
 
-  #define BEEPER_PIN                        PG4
-  #define BTN_ENC                           PA8
+  #define BEEPER_PIN                EXPA1_10_PIN
+  #define BTN_ENC                   EXPA1_09_PIN
 
   #if ENABLED(CR10_STOCKDISPLAY)
 
-    #define LCD_PINS_RS                     PG6
+    #define LCD_PINS_RS             EXPA1_04_PIN
 
-    #define BTN_EN1                         PD11
-    #define BTN_EN2                         PG2
+    #define BTN_EN1                 EXPA1_08_PIN
+    #define BTN_EN2                 EXPA1_06_PIN
 
-    #define LCD_PINS_ENABLE                 PG7
-    #define LCD_PINS_D4                     PG3
+    #define LCD_PINS_ENABLE         EXPA1_03_PIN
+    #define LCD_PINS_D4             EXPA1_05_PIN
 
     // CR10_STOCKDISPLAY default timing is too fast
     #undef BOARD_ST7920_DELAY_1
@@ -315,45 +387,45 @@
 
   #elif ENABLED(MKS_MINI_12864)
 
-    #define DOGLCD_A0                       PG6
-    #define DOGLCD_CS                       PG3
-    #define BTN_EN1                         PG10
-    #define BTN_EN2                         PF11
+    #define DOGLCD_A0               EXPA1_04_PIN
+    #define DOGLCD_CS               EXPA1_05_PIN
+    #define BTN_EN1                 EXPA2_08_PIN
+    #define BTN_EN2                 EXPA2_06_PIN
 
   #else
 
-    #define LCD_PINS_RS                     PD10
+    #define LCD_PINS_RS             EXPA1_07_PIN
 
-    #define BTN_EN1                         PG10
-    #define BTN_EN2                         PF11
+    #define BTN_EN1                 EXPA2_08_PIN
+    #define BTN_EN2                 EXPA2_06_PIN
 
-    #define LCD_PINS_ENABLE                 PD11
-    #define LCD_PINS_D4                     PG2
+    #define LCD_PINS_ENABLE         EXPA1_08_PIN
+    #define LCD_PINS_D4             EXPA1_06_PIN
 
     #if ENABLED(FYSETC_MINI_12864)
-      #define DOGLCD_CS                     PD11
-      #define DOGLCD_A0                     PD10
+      #define DOGLCD_CS             EXPA1_08_PIN
+      #define DOGLCD_A0             EXPA1_07_PIN
       //#define LCD_BACKLIGHT_PIN           -1
-      #define LCD_RESET_PIN                 PG2   // Must be high or open for LCD to operate normally.
+      #define LCD_RESET_PIN         EXPA1_06_PIN  // Must be high or open for LCD to operate normally.
       #if EITHER(FYSETC_MINI_12864_1_2, FYSETC_MINI_12864_2_0)
         #ifndef RGB_LED_R_PIN
-          #define RGB_LED_R_PIN             PG3
+          #define RGB_LED_R_PIN     EXPA1_05_PIN
         #endif
         #ifndef RGB_LED_G_PIN
-          #define RGB_LED_G_PIN             PG6
+          #define RGB_LED_G_PIN     EXPA1_04_PIN
         #endif
         #ifndef RGB_LED_B_PIN
-          #define RGB_LED_B_PIN             PG7
+          #define RGB_LED_B_PIN     EXPA1_03_PIN
         #endif
       #elif ENABLED(FYSETC_MINI_12864_2_1)
-        #define NEOPIXEL_PIN                PG3
+        #define NEOPIXEL_PIN        EXPA1_05_PIN
       #endif
     #endif // !FYSETC_MINI_12864
 
     #if IS_ULTIPANEL
-      #define LCD_PINS_D5                   PG3
-      #define LCD_PINS_D6                   PG6
-      #define LCD_PINS_D7                   PG7
+      #define LCD_PINS_D5           EXPA1_05_PIN
+      #define LCD_PINS_D6           EXPA1_04_PIN
+      #define LCD_PINS_D7           EXPA1_03_PIN
     #endif
 
   #endif