✨ DWIN LCD for BTT SKR Mini E3 (#22288)

Marlin/src/inc/Conditionals_LCD.h

@@ -1078,7 +1078,11 @@
 #if ENABLED(DWIN_CREALITY_LCD)
   #define SERIAL_CATCHALL 0
   #ifndef LCD_SERIAL_PORT
-    #define LCD_SERIAL_PORT 3 // Creality 4.x board
+    #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO)
+      #define LCD_SERIAL_PORT 1
+    #else
+      #define LCD_SERIAL_PORT 3 // Creality 4.x board
+    #endif
   #endif
 #endif
 

Marlin/src/pins/lpc1769/pins_BTT_SKR_E3_TURBO.h

@@ -202,7 +202,7 @@
 #define EXP1_10_PIN                        P2_08
 
 #if ENABLED(DWIN_CREALITY_LCD)
-  #error "DWIN_CREALITY_LCD requires a custom cable with TX = P0_15, RX = P0_16, and LCD_SERIAL_PORT 1. Comment out this line to continue."
+  #error "DWIN_CREALITY_LCD requires a custom cable with TX = P0_15, RX = P0_16. Comment out this line to continue."
 
   #define BEEPER_PIN                 EXP1_10_PIN
   #define BTN_EN1                    EXP1_03_PIN

Marlin/src/pins/stm32f1/pins_BTT_SKR_MINI_E3_common.h

@@ -117,14 +117,14 @@
 
 /**
  *        SKR Mini E3 V1.0, V1.2                      SKR Mini E3 V2.0
- *                _____                                     _____
- *            5V | 1 2 | GND                            5V | 1 2 | GND
- *  (LCD_EN) PB7 | 3 4 | PB8  (LCD_RS)       (LCD_EN) PB15 | 3 4 | PB8  (LCD_RS)
- *  (LCD_D4) PB9 | 5 6   PA10 (BTN_EN2)      (LCD_D4) PB9  | 5 6   PA10 (BTN_EN2)
- *         RESET | 7 8 | PA9  (BTN_EN1)              RESET | 7 8 | PA9  (BTN_EN1)
- * (BTN_ENC) PB6 | 9 10| PB5  (BEEPER)      (BTN_ENC) PA15 | 9 10| PB5  (BEEPER)
- *                -----                                     -----
- *                EXP1                                      EXP1
+ *                ______                                    ______
+ *            5V | 1  2 | GND                           5V | 1  2 | GND
+ *  (LCD_EN) PB7 | 3  4 | PB8  (LCD_RS)      (LCD_EN) PB15 | 3  4 | PB8  (LCD_RS)
+ *  (LCD_D4) PB9 | 5  6   PA10 (BTN_EN2)     (LCD_D4) PB9  | 5  6   PA10 (BTN_EN2)
+ *         RESET | 7  8 | PA9  (BTN_EN1)             RESET | 7  8 | PA9  (BTN_EN1)
+ * (BTN_ENC) PB6 | 9 10 | PB5  (BEEPER)     (BTN_ENC) PA15 | 9 10 | PB5  (BEEPER)
+ *                ------                                    ------
+ *                 EXP1                                      EXP1
  */
 #ifdef SKR_MINI_E3_V2
   #define EXP1_9                            PA15
@@ -134,7 +134,28 @@
   #define EXP1_3                            PB7
 #endif
 
-#if HAS_WIRED_LCD
+#if ENABLED(DWIN_CREALITY_LCD)
+  /**
+   *        ------              ------              ------
+   *   VCC | 1  2 | GND    VCC | 1  2 | GND    GND |  2 1 | VCC
+   *     A | 3  4 | B        A | 3  4 | B        B |  4 3 | A
+   *       | 5  6   TX    BEEP | 5  6   ENT    ENT |  6 5 | BEEP
+   *       | 7  8 | RX      TX | 7  8 | RX      RX |  8 7 | TX
+   *  BEEP | 9 10 | ENT        | 9 10 |            | 10 9 |
+   *        ------              ------              ------
+   *         EXP1                DWIN             DWIN (plug)
+   *
+   * All pins are labeled as printed on DWIN PCB. Connect TX-TX, A-A and so on.
+   */
+
+  #error "DWIN_CREALITY_LCD requires a custom cable, see diagram above this line. Comment out this line to continue."
+
+  #define BEEPER_PIN                      EXP1_9
+  #define BTN_EN1                         EXP1_3
+  #define BTN_EN2                           PB8
+  #define BTN_ENC                           PB5
+
+#elif HAS_WIRED_LCD
 
   #if ENABLED(CR10_STOCKDISPLAY)
 
@@ -184,19 +205,19 @@
        * TFTGLCD_PANEL_SPI display pinout
        *
        *               Board                                      Display
-       *               _____                                       _____
-       *           5V | 1 2 | GND                (SPI1-MISO) MISO | 1 2 | SCK   (SPI1-SCK)
-       * (FREE)   PB7 | 3 4 | PB8  (LCD_CS)      (PA9)     LCD_CS | 3 4 | SD_CS (PA10)
-       * (FREE)   PB9 | 5 6 | PA10 (SD_CS)                 (FREE) | 5 6 | MOSI  (SPI1-MOSI)
-       *        RESET | 7 8 | PA9  (MOD_RESET)   (PB5)     SD_DET | 7 8 | (FREE)
-       * (BEEPER) PB6 | 9 10| PB5  (SD_DET)                   GND | 9 10| 5V
-       *               -----                                       -----
-       *                EXP1                                        EXP1
+       *               ______                                       ______
+       *           5V | 1  2 | GND                (SPI1-MISO) MISO | 1  2 | SCK   (SPI1-SCK)
+       * (FREE)   PB7 | 3  4 | PB8  (LCD_CS)      (PA9)     LCD_CS | 3  4 | SD_CS (PA10)
+       * (FREE)   PB9 | 5  6 | PA10 (SD_CS)                 (FREE) | 5  6 | MOSI  (SPI1-MOSI)
+       *        RESET | 7  8 | PA9  (MOD_RESET)   (PB5)     SD_DET | 7  8 | (FREE)
+       * (BEEPER) PB6 | 9 10 | PB5  (SD_DET)                   GND | 9 10 | 5V
+       *               ------                                       ------
+       *                EXP1                                         EXP1
        *
        * Needs custom cable:
        *
-       *    Board   Adapter   Display
-       *           _________
+       *    Board             Display
+       *
        *   EXP1-1 ----------- EXP1-10
        *   EXP1-2 ----------- EXP1-9
        *   SPI1-4 ----------- EXP1-6
@@ -223,17 +244,18 @@
 
   #error "CAUTION! LCD_FYSETC_TFT81050 requires wiring modifications. See 'pins_BTT_SKR_MINI_E3_common.h' for details. Comment out this line to continue."
 
-  /** FYSETC TFT TFT81050 display pinout
+  /**
+   * FYSETC TFT TFT81050 display pinout
    *
    *               Board                                      Display
-   *               _____                                       _____
-   *           5V | 1 2 | GND                (SPI1-MISO) MISO | 1 2 | SCK   (SPI1-SCK)
-   * (FREE)   PB7 | 3 4 | PB8  (LCD_CS)      (PA9)  MOD_RESET | 3 4 | SD_CS (PA10)
-   * (FREE)   PB9 | 5 6 | PA10 (SD_CS)       (PB8)     LCD_CS | 5 6 | MOSI  (SPI1-MOSI)
-   *        RESET | 7 8 | PA9  (MOD_RESET)   (PB5)     SD_DET | 7 8 | RESET
-   * (BEEPER) PB6 | 9 10| PB5  (SD_DET)                   GND | 9 10| 5V
-   *               -----                                       -----
-   *                EXP1                                        EXP1
+   *               ______                                       ______
+   *           5V | 1  2 | GND                (SPI1-MISO) MISO | 1  2 | SCK   (SPI1-SCK)
+   * (FREE)   PB7 | 3  4 | PB8  (LCD_CS)      (PA9)  MOD_RESET | 3  4 | SD_CS (PA10)
+   * (FREE)   PB9 | 5  6 | PA10 (SD_CS)       (PB8)     LCD_CS | 5  6 | MOSI  (SPI1-MOSI)
+   *        RESET | 7  8 | PA9  (MOD_RESET)   (PB5)     SD_DET | 7  8 | RESET
+   * (BEEPER) PB6 | 9 10 | PB5  (SD_DET)                   GND | 9 10 | 5V
+   *               ------                                       ------
+   *                EXP1                                         EXP1
    *
    * Needs custom cable:
    *