EXP headers for RAMPS 1.x (#21054)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_3.h

  *               EXP2                                               EXP1
  */
 
-#define EXPA1_03_PIN                       P1_23
-#define EXPA1_04_PIN                       P1_22
-#define EXPA1_05_PIN                       P1_21
-#define EXPA1_06_PIN                       P1_20
-#define EXPA1_07_PIN                       P1_19
-#define EXPA1_08_PIN                       P1_18
-#define EXPA1_09_PIN                       P0_28
-#define EXPA1_10_PIN                       P1_30
-
-#define EXPA2_03_PIN                       -1
-#define EXPA2_04_PIN                       P1_31
-#define EXPA2_05_PIN                       P0_18
-#define EXPA2_06_PIN                       P3_25
-#define EXPA2_07_PIN                       P0_16
-#define EXPA2_08_PIN                       P3_26
-#define EXPA2_09_PIN                       P0_15
-#define EXPA2_10_PIN                       P0_17
+#define EXP1_03_PIN                        P1_23
+#define EXP1_04_PIN                        P1_22
+#define EXP1_05_PIN                        P1_21
+#define EXP1_06_PIN                        P1_20
+#define EXP1_07_PIN                        P1_19
+#define EXP1_08_PIN                        P1_18
+#define EXP1_09_PIN                        P0_28
+#define EXP1_10_PIN                        P1_30
+
+#define EXP2_03_PIN                        -1
+#define EXP2_04_PIN                        P1_31
+#define EXP2_05_PIN                        P0_18
+#define EXP2_06_PIN                        P3_25
+#define EXP2_07_PIN                        P0_16
+#define EXP2_08_PIN                        P3_26
+#define EXP2_09_PIN                        P0_15
+#define EXP2_10_PIN                        P0_17
 
 #if HAS_WIRED_LCD
   #if ENABLED(ANET_FULL_GRAPHICS_LCD_ALT_WIRING)
     *                   LCD                             LCD
     */
 
-    #define LCD_PINS_RS             EXPA1_03_PIN
+    #define LCD_PINS_RS              EXP1_03_PIN
 
-    #define BTN_EN1                 EXPA1_06_PIN
-    #define BTN_EN2                 EXPA1_04_PIN
-    #define BTN_ENC                 EXPA1_08_PIN
+    #define BTN_EN1                  EXP1_06_PIN
+    #define BTN_EN2                  EXP1_04_PIN
+    #define BTN_ENC                  EXP1_08_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_05_PIN
-    #define LCD_PINS_D4             EXPA1_07_PIN
+    #define LCD_PINS_ENABLE          EXP1_05_PIN
+    #define LCD_PINS_D4              EXP1_07_PIN
 
   #elif ENABLED(CR10_STOCKDISPLAY)
 
-    #define LCD_PINS_RS             EXPA1_04_PIN
+    #define LCD_PINS_RS              EXP1_04_PIN
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
-    #define BTN_ENC                 EXPA1_09_PIN  // (58) open-drain
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
+    #define BTN_ENC                  EXP1_09_PIN  // (58) open-drain
 
-    #define LCD_PINS_ENABLE         EXPA1_03_PIN
-    #define LCD_PINS_D4             EXPA1_05_PIN
+    #define LCD_PINS_ENABLE          EXP1_03_PIN
+    #define LCD_PINS_D4              EXP1_05_PIN
 
   #elif HAS_ADC_BUTTONS
 
   #elif IS_TFTGLCD_PANEL
 
     #if ENABLED(TFTGLCD_PANEL_SPI)
-      #define TFTGLCD_CS            EXPA2_08_PIN
+      #define TFTGLCD_CS             EXP2_08_PIN
     #endif
 
-    #define SD_DETECT_PIN           EXPA2_04_PIN
+    #define SD_DETECT_PIN            EXP2_04_PIN
 
   #else                                           // !CR10_STOCKDISPLAY
 
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA2_08_PIN  // (31) J3-2 & AUX-4
-    #define BTN_EN2                 EXPA2_06_PIN  // (33) J3-4 & AUX-4
-    #define BTN_ENC                 EXPA1_09_PIN  // (58) open-drain
+    #define BTN_EN1                  EXP2_08_PIN  // (31) J3-2 & AUX-4
+    #define BTN_EN2                  EXP2_06_PIN  // (33) J3-4 & AUX-4
+    #define BTN_ENC                  EXP1_09_PIN  // (58) open-drain
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
 
-    #define LCD_SDSS                EXPA2_07_PIN  // (16) J3-7 & AUX-4
-    #define SD_DETECT_PIN           EXPA2_04_PIN  // (49) (NOT 5V tolerant)
+    #define LCD_SDSS                 EXP2_07_PIN  // (16) J3-7 & AUX-4
+    #define SD_DETECT_PIN            EXP2_04_PIN  // (49) (NOT 5V tolerant)
 
     #if ENABLED(FYSETC_MINI_12864)
-      #define DOGLCD_CS             EXPA1_08_PIN
-      #define DOGLCD_A0             EXPA1_07_PIN
-      #define DOGLCD_SCK            EXPA2_09_PIN
-      #define DOGLCD_MOSI           EXPA2_05_PIN
+      #define DOGLCD_CS              EXP1_08_PIN
+      #define DOGLCD_A0              EXP1_07_PIN
+      #define DOGLCD_SCK             EXP2_09_PIN
+      #define DOGLCD_MOSI            EXP2_05_PIN
 
       #define LCD_BACKLIGHT_PIN            -1
 
       #define FORCE_SOFT_SPI                      // Use this if default of hardware SPI causes display problems
                                                   //   results in LCD soft SPI mode 3, SD soft SPI mode 0
 
-      #define LCD_RESET_PIN         EXPA1_06_PIN  // Must be high or open for LCD to operate normally.
+      #define LCD_RESET_PIN          EXP1_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     EXPA1_05_PIN
+          #define RGB_LED_R_PIN      EXP1_05_PIN
         #endif
         #ifndef RGB_LED_G_PIN
-          #define RGB_LED_G_PIN     EXPA1_04_PIN
+          #define RGB_LED_G_PIN      EXP1_04_PIN
         #endif
         #ifndef RGB_LED_B_PIN
-          #define RGB_LED_B_PIN     EXPA1_03_PIN
+          #define RGB_LED_B_PIN      EXP1_03_PIN
         #endif
       #elif ENABLED(FYSETC_MINI_12864_2_1)
-        #define NEOPIXEL_PIN        EXPA1_05_PIN
+        #define NEOPIXEL_PIN         EXP1_05_PIN
       #endif
 
     #else                                         // !FYSETC_MINI_12864
 
       #if ENABLED(MKS_MINI_12864)
 
-        #define DOGLCD_CS           EXPA1_05_PIN
-        #define DOGLCD_A0           EXPA1_04_PIN
-        #define DOGLCD_SCK          EXPA2_09_PIN
-        #define DOGLCD_MOSI         EXPA2_05_PIN
+        #define DOGLCD_CS            EXP1_05_PIN
+        #define DOGLCD_A0            EXP1_04_PIN
+        #define DOGLCD_SCK           EXP2_09_PIN
+        #define DOGLCD_MOSI          EXP2_05_PIN
 
       #elif ENABLED(ENDER2_STOCKDISPLAY)
 
          *                    EXP1
          */
 
-        #define BTN_EN1             EXPA1_08_PIN
-        #define BTN_EN2             EXPA1_06_PIN
-        #define BTN_ENC             EXPA1_09_PIN
-        #define DOGLCD_CS           EXPA1_04_PIN
-        #define DOGLCD_A0           EXPA1_05_PIN
-        #define DOGLCD_SCK          EXPA1_10_PIN
-        #define DOGLCD_MOSI         EXPA1_03_PIN
+        #define BTN_EN1              EXP1_08_PIN
+        #define BTN_EN2              EXP1_06_PIN
+        #define BTN_ENC              EXP1_09_PIN
+        #define DOGLCD_CS            EXP1_04_PIN
+        #define DOGLCD_A0            EXP1_05_PIN
+        #define DOGLCD_SCK           EXP1_10_PIN
+        #define DOGLCD_MOSI          EXP1_03_PIN
         #define FORCE_SOFT_SPI
         #define LCD_BACKLIGHT_PIN          -1
       #endif
 
       #if IS_ULTIPANEL
-        #define LCD_PINS_D5         EXPA1_05_PIN
-        #define LCD_PINS_D6         EXPA1_04_PIN
-        #define LCD_PINS_D7         EXPA1_03_PIN
+        #define LCD_PINS_D5          EXP1_05_PIN
+        #define LCD_PINS_D6          EXP1_04_PIN
+        #define LCD_PINS_D7          EXP1_03_PIN
 
         #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
           #define BTN_ENC_EN         LCD_PINS_D7  // Detect the presence of the encoder
 #endif
 
 #if SD_CONNECTION_IS(LCD)
-  #define SD_SS_PIN                 EXPA2_07_PIN
+  #define SD_SS_PIN                  EXP2_07_PIN
 #endif
 
 /**

Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_4.h

  *               EXP2                         EXP1
  */
 
-#define EXPA1_03_PIN                       P1_23
-#define EXPA1_04_PIN                       P1_22
-#define EXPA1_05_PIN                       P1_21
-#define EXPA1_06_PIN                       P1_20
-#define EXPA1_07_PIN                       P1_19
-#define EXPA1_08_PIN                       P1_18
-#define EXPA1_09_PIN                       P0_28
-#define EXPA1_10_PIN                       P1_30
-
-#define EXPA2_03_PIN                       -1
-#define EXPA2_04_PIN                       P1_31
-#define EXPA2_05_PIN                       P0_18
-#define EXPA2_06_PIN                       P3_25
-#define EXPA2_07_PIN                       P0_16
-#define EXPA2_08_PIN                       P3_26
-#define EXPA2_09_PIN                       P0_15
-#define EXPA2_10_PIN                       P0_17
+#define EXP1_03_PIN                        P1_23
+#define EXP1_04_PIN                        P1_22
+#define EXP1_05_PIN                        P1_21
+#define EXP1_06_PIN                        P1_20
+#define EXP1_07_PIN                        P1_19
+#define EXP1_08_PIN                        P1_18
+#define EXP1_09_PIN                        P0_28
+#define EXP1_10_PIN                        P1_30
+
+#define EXP2_03_PIN                        -1
+#define EXP2_04_PIN                        P1_31
+#define EXP2_05_PIN                        P0_18
+#define EXP2_06_PIN                        P3_25
+#define EXP2_07_PIN                        P0_16
+#define EXP2_08_PIN                        P3_26
+#define EXP2_09_PIN                        P0_15
+#define EXP2_10_PIN                        P0_17
 
 //
 // SD Connection
 //
 #if SD_CONNECTION_IS(LCD)
-  #define SD_SS_PIN                 EXPA2_07_PIN
+  #define SD_SS_PIN                  EXP2_07_PIN
 #endif
 
 /**
 #if ENABLED(DWIN_CREALITY_LCD)
 
   // RET6 DWIN ENCODER LCD
-  #define BTN_ENC                           P1_20
-  #define BTN_EN1                           P1_23
-  #define BTN_EN2                           P1_22
+  #define BTN_ENC                          P1_20
+  #define BTN_EN1                          P1_23
+  #define BTN_EN2                          P1_22
 
   #ifndef BEEPER_PIN
-    #define BEEPER_PIN                      P1_21
+    #define BEEPER_PIN                     P1_21
     #undef SPEAKER
   #endif
 
      *                 LCD                        LCD
      */
 
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA1_05_PIN
-    #define BTN_EN2                 EXPA1_04_PIN
-    #define BTN_ENC                 EXPA1_10_PIN
+    #define BTN_EN1                  EXP1_05_PIN
+    #define BTN_EN2                  EXP1_04_PIN
+    #define BTN_ENC                  EXP1_10_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
-    #define BEEPER_PIN              EXPA1_03_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
+    #define BEEPER_PIN               EXP1_03_PIN
 
   #elif ENABLED(ANET_FULL_GRAPHICS_LCD)
     #error "CAUTION! ANET_FULL_GRAPHICS_LCD requires wiring modifications. See 'pins_BTT_SKR_V1_4.h' for details. Comment out this line to continue."
     *                 LCD                        LCD
     */
 
-    #define LCD_PINS_RS             EXPA1_03_PIN
+    #define LCD_PINS_RS              EXP1_03_PIN
 
-    #define BTN_EN1                 EXPA1_06_PIN
-    #define BTN_EN2                 EXPA1_04_PIN
-    #define BTN_ENC                 EXPA1_08_PIN
+    #define BTN_EN1                  EXP1_06_PIN
+    #define BTN_EN2                  EXP1_04_PIN
+    #define BTN_ENC                  EXP1_08_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_05_PIN
-    #define LCD_PINS_D4             EXPA1_07_PIN
+    #define LCD_PINS_ENABLE          EXP1_05_PIN
+    #define LCD_PINS_D4              EXP1_07_PIN
 
-    #define BEEPER_PIN              EXPA1_10_PIN
+    #define BEEPER_PIN               EXP1_10_PIN
 
   #elif ENABLED(CR10_STOCKDISPLAY)
-    #define BTN_ENC                 EXPA1_09_PIN  // (58) open-drain
-    #define LCD_PINS_RS             EXPA1_04_PIN
+    #define BTN_ENC                  EXP1_09_PIN  // (58) open-drain
+    #define LCD_PINS_RS              EXP1_04_PIN
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_03_PIN
-    #define LCD_PINS_D4             EXPA1_05_PIN
+    #define LCD_PINS_ENABLE          EXP1_03_PIN
+    #define LCD_PINS_D4              EXP1_05_PIN
 
   #elif ENABLED(ENDER2_STOCKDISPLAY)
 
      *                    EXP1
      */
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
-    #define BTN_ENC                 EXPA1_09_PIN
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
+    #define BTN_ENC                  EXP1_09_PIN
 
-    #define DOGLCD_CS               EXPA1_04_PIN
-    #define DOGLCD_A0               EXPA1_05_PIN
-    #define DOGLCD_SCK              EXPA1_10_PIN
-    #define DOGLCD_MOSI             EXPA1_03_PIN
+    #define DOGLCD_CS                EXP1_04_PIN
+    #define DOGLCD_A0                EXP1_05_PIN
+    #define DOGLCD_SCK               EXP1_10_PIN
+    #define DOGLCD_MOSI              EXP1_03_PIN
     #define FORCE_SOFT_SPI
     #define LCD_BACKLIGHT_PIN              -1
 
   #elif HAS_SPI_TFT                               // Config for Classic UI (emulated DOGM) and Color UI
-    #define TFT_CS_PIN              EXPA1_04_PIN
-    #define TFT_A0_PIN              EXPA1_03_PIN
-    #define TFT_DC_PIN              EXPA1_03_PIN
-    #define TFT_MISO_PIN            EXPA2_10_PIN
-    #define TFT_BACKLIGHT_PIN       EXPA1_08_PIN
-    #define TFT_RESET_PIN           EXPA1_07_PIN
+    #define TFT_CS_PIN               EXP1_04_PIN
+    #define TFT_A0_PIN               EXP1_03_PIN
+    #define TFT_DC_PIN               EXP1_03_PIN
+    #define TFT_MISO_PIN             EXP2_10_PIN
+    #define TFT_BACKLIGHT_PIN        EXP1_08_PIN
+    #define TFT_RESET_PIN            EXP1_07_PIN
 
     #define LCD_USE_DMA_SPI
 
-    #define TOUCH_INT_PIN           EXPA1_05_PIN
-    #define TOUCH_CS_PIN            EXPA1_06_PIN
+    #define TOUCH_INT_PIN            EXP1_05_PIN
+    #define TOUCH_CS_PIN             EXP1_06_PIN
     #define TOUCH_BUTTONS_HW_SPI
     #define TOUCH_BUTTONS_HW_SPI_DEVICE        1
 
     // SPI 1
-    #define SD_SCK_PIN              EXPA2_09_PIN
-    #define SD_MISO_PIN             EXPA2_10_PIN
-    #define SD_MOSI_PIN             EXPA2_05_PIN
+    #define SD_SCK_PIN               EXP2_09_PIN
+    #define SD_MISO_PIN              EXP2_10_PIN
+    #define SD_MOSI_PIN              EXP2_05_PIN
 
     // Disable any LCD related PINs config
     #define LCD_PINS_ENABLE                -1
   #elif IS_TFTGLCD_PANEL
 
     #if ENABLED(TFTGLCD_PANEL_SPI)
-      #define TFTGLCD_CS            EXPA2_08_PIN
+      #define TFTGLCD_CS             EXP2_08_PIN
     #endif
 
-    #define SD_DETECT_PIN           EXPA2_04_PIN
+    #define SD_DETECT_PIN            EXP2_04_PIN
 
   #else
 
-    #define BTN_ENC                 EXPA1_09_PIN  // (58) open-drain
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define BTN_ENC                  EXP1_09_PIN  // (58) open-drain
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA2_08_PIN  // (31) J3-2 & AUX-4
-    #define BTN_EN2                 EXPA2_06_PIN  // (33) J3-4 & AUX-4
+    #define BTN_EN1                  EXP2_08_PIN  // (31) J3-2 & AUX-4
+    #define BTN_EN2                  EXP2_06_PIN  // (33) J3-4 & AUX-4
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
 
-    #define LCD_SDSS                EXPA2_07_PIN  // (16) J3-7 & AUX-4
+    #define LCD_SDSS                 EXP2_07_PIN  // (16) J3-7 & AUX-4
 
     #if SD_CONNECTION_IS(LCD)
-      #define SD_DETECT_PIN         EXPA2_04_PIN  // (49) (NOT 5V tolerant)
+      #define SD_DETECT_PIN          EXP2_04_PIN  // (49) (NOT 5V tolerant)
     #endif
 
     #if ENABLED(FYSETC_MINI_12864)
-      #define DOGLCD_CS             EXPA1_08_PIN
-      #define DOGLCD_A0             EXPA1_07_PIN
-      #define DOGLCD_SCK            EXPA2_09_PIN
-      #define DOGLCD_MOSI           EXPA2_05_PIN
+      #define DOGLCD_CS              EXP1_08_PIN
+      #define DOGLCD_A0              EXP1_07_PIN
+      #define DOGLCD_SCK             EXP2_09_PIN
+      #define DOGLCD_MOSI            EXP2_05_PIN
 
       #define LCD_BACKLIGHT_PIN            -1
 
       #define FORCE_SOFT_SPI                      // Use this if default of hardware SPI causes display problems
                                                   //   results in LCD soft SPI mode 3, SD soft SPI mode 0
 
-      #define LCD_RESET_PIN         EXPA1_06_PIN  // Must be high or open for LCD to operate normally.
+      #define LCD_RESET_PIN          EXP1_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     EXPA1_05_PIN
+          #define RGB_LED_R_PIN      EXP1_05_PIN
         #endif
         #ifndef RGB_LED_G_PIN
-          #define RGB_LED_G_PIN     EXPA1_04_PIN
+          #define RGB_LED_G_PIN      EXP1_04_PIN
         #endif
         #ifndef RGB_LED_B_PIN
-          #define RGB_LED_B_PIN     EXPA1_03_PIN
+          #define RGB_LED_B_PIN      EXP1_03_PIN
         #endif
       #elif ENABLED(FYSETC_MINI_12864_2_1)
-        #define NEOPIXEL_PIN        EXPA1_05_PIN
+        #define NEOPIXEL_PIN         EXP1_05_PIN
       #endif
 
     #else                                         // !FYSETC_MINI_12864
 
       #if ENABLED(MKS_MINI_12864)
-        #define DOGLCD_CS           EXPA1_05_PIN
-        #define DOGLCD_A0           EXPA1_04_PIN
-        #define DOGLCD_SCK          EXPA2_09_PIN
-        #define DOGLCD_MOSI         EXPA2_05_PIN
+        #define DOGLCD_CS            EXP1_05_PIN
+        #define DOGLCD_A0            EXP1_04_PIN
+        #define DOGLCD_SCK           EXP2_09_PIN
+        #define DOGLCD_MOSI          EXP2_05_PIN
         #define FORCE_SOFT_SPI
       #endif
 
       #if IS_ULTIPANEL
-        #define LCD_PINS_D5         EXPA1_05_PIN
-        #define LCD_PINS_D6         EXPA1_04_PIN
-        #define LCD_PINS_D7         EXPA1_03_PIN
+        #define LCD_PINS_D5          EXP1_05_PIN
+        #define LCD_PINS_D6          EXP1_04_PIN
+        #define LCD_PINS_D7          EXP1_03_PIN
 
         #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
-          #define BTN_ENC_EN        EXPA1_03_PIN  // Detect the presence of the encoder
+          #define BTN_ENC_EN         EXP1_03_PIN  // Detect the presence of the encoder
         #endif
 
       #endif

Marlin/src/pins/lpc1768/pins_BTT_SKR_common.h

    */
 
   // M1 on Driver Expansion Module
-  #define E2_STEP_PIN               EXPA2_05_PIN
-  #define E2_DIR_PIN                EXPA2_06_PIN
-  #define E2_ENABLE_PIN             EXPA2_04_PIN
+  #define E2_STEP_PIN                EXP2_05_PIN
+  #define E2_DIR_PIN                 EXP2_06_PIN
+  #define E2_ENABLE_PIN              EXP2_04_PIN
   #if !EXP_MOT_USE_EXP2_ONLY
-    #define E2_DIAG_PIN             EXPA1_06_PIN
-    #define E2_CS_PIN               EXPA1_05_PIN
+    #define E2_DIAG_PIN              EXP1_06_PIN
+    #define E2_CS_PIN                EXP1_05_PIN
     #if HAS_TMC_UART
-      #define E2_SERIAL_TX_PIN      EXPA1_05_PIN
-      #define E2_SERIAL_RX_PIN      EXPA1_05_PIN
+      #define E2_SERIAL_TX_PIN       EXP1_05_PIN
+      #define E2_SERIAL_RX_PIN       EXP1_05_PIN
     #endif
   #endif
 
   // M2 on Driver Expansion Module
-  #define E3_STEP_PIN               EXPA2_08_PIN
-  #define E3_DIR_PIN                EXPA2_07_PIN
+  #define E3_STEP_PIN                EXP2_08_PIN
+  #define E3_DIR_PIN                 EXP2_07_PIN
   #if !EXP_MOT_USE_EXP2_ONLY
-    #define E3_ENABLE_PIN           EXPA1_03_PIN
-    #define E3_DIAG_PIN             EXPA1_08_PIN
-    #define E3_CS_PIN               EXPA1_07_PIN
+    #define E3_ENABLE_PIN            EXP1_03_PIN
+    #define E3_DIAG_PIN              EXP1_08_PIN
+    #define E3_CS_PIN                EXP1_07_PIN
     #if HAS_TMC_UART
-      #define E3_SERIAL_TX_PIN      EXPA1_07_PIN
-      #define E3_SERIAL_RX_PIN      EXPA1_07_PIN
+      #define E3_SERIAL_TX_PIN       EXP1_07_PIN
+      #define E3_SERIAL_RX_PIN       EXP1_07_PIN
     #endif
   #else
-    #define E3_ENABLE_PIN           EXPA2_04_PIN
+    #define E3_ENABLE_PIN            EXP2_04_PIN
   #endif
 
   // M3 on Driver Expansion Module
-  #define E4_STEP_PIN               EXPA2_10_PIN
-  #define E4_DIR_PIN                EXPA2_09_PIN
+  #define E4_STEP_PIN                EXP2_10_PIN
+  #define E4_DIR_PIN                 EXP2_09_PIN
   #if !EXP_MOT_USE_EXP2_ONLY
-    #define E4_ENABLE_PIN           EXPA1_04_PIN
-    #define E4_DIAG_PIN             EXPA1_10_PIN
-    #define E4_CS_PIN               EXPA1_09_PIN
+    #define E4_ENABLE_PIN            EXP1_04_PIN
+    #define E4_DIAG_PIN              EXP1_10_PIN
+    #define E4_CS_PIN                EXP1_09_PIN
     #if HAS_TMC_UART
-      #define E4_SERIAL_TX_PIN      EXPA1_09_PIN
-      #define E4_SERIAL_RX_PIN      EXPA1_09_PIN
+      #define E4_SERIAL_TX_PIN       EXP1_09_PIN
+      #define E4_SERIAL_RX_PIN       EXP1_09_PIN
     #endif
   #else
-    #define E4_ENABLE_PIN           EXPA2_04_PIN
+    #define E4_ENABLE_PIN            EXP2_04_PIN
   #endif
 
 #endif // HAS_BTT_EXP_MOT

Marlin/src/pins/lpc1769/pins_BTT_SKR_E3_TURBO.h

  *                   EXP
  */
 
-#define EXPA1_03_PIN                       P0_18
-#define EXPA1_04_PIN                       P0_17
-#define EXPA1_05_PIN                       P0_15
-#define EXPA1_06_PIN                       P0_20
-#define EXPA1_07_PIN                       -1
-#define EXPA1_08_PIN                       P0_19
-#define EXPA1_09_PIN                       P0_16
-#define EXPA1_10_PIN                       P2_08
+#define EXP1_03_PIN                        P0_18
+#define EXP1_04_PIN                        P0_17
+#define EXP1_05_PIN                        P0_15
+#define EXP1_06_PIN                        P0_20
+#define EXP1_07_PIN                        -1
+#define EXP1_08_PIN                        P0_19
+#define EXP1_09_PIN                        P0_16
+#define EXP1_10_PIN                        P2_08
 
 #if HAS_WIRED_LCD
 
   #if ENABLED(CR10_STOCKDISPLAY)
 
-    #define BEEPER_PIN              EXPA1_10_PIN
+    #define BEEPER_PIN               EXP1_10_PIN
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
-    #define BTN_ENC                 EXPA1_09_PIN
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
+    #define BTN_ENC                  EXP1_09_PIN
 
-    #define LCD_PINS_RS             EXPA1_04_PIN
-    #define LCD_PINS_ENABLE         EXPA1_03_PIN
-    #define LCD_PINS_D4             EXPA1_05_PIN
+    #define LCD_PINS_RS              EXP1_04_PIN
+    #define LCD_PINS_ENABLE          EXP1_03_PIN
+    #define LCD_PINS_D4              EXP1_05_PIN
 
   #elif ENABLED(ZONESTAR_LCD)                     // ANET A8 LCD Controller - Must convert to 3.3V - CONNECTING TO 5V WILL DAMAGE THE BOARD!
 
     #error "CAUTION! ZONESTAR_LCD requires wiring modifications. See 'pins_BTT_SKR_E3_TURBO.h' for details. Comment out this line to continue."
 
-    #define LCD_PINS_RS             EXPA1_05_PIN
-    #define LCD_PINS_ENABLE         EXPA1_09_PIN
-    #define LCD_PINS_D4             EXPA1_04_PIN
-    #define LCD_PINS_D5             EXPA1_06_PIN
-    #define LCD_PINS_D6             EXPA1_08_PIN
-    #define LCD_PINS_D7             EXPA1_10_PIN
+    #define LCD_PINS_RS              EXP1_05_PIN
+    #define LCD_PINS_ENABLE          EXP1_09_PIN
+    #define LCD_PINS_D4              EXP1_04_PIN
+    #define LCD_PINS_D5              EXP1_06_PIN
+    #define LCD_PINS_D6              EXP1_08_PIN
+    #define LCD_PINS_D7              EXP1_10_PIN
     #define ADC_KEYPAD_PIN                 P1_23  // Repurpose servo pin for ADC - CONNECTING TO 5V WILL DAMAGE THE BOARD!
 
   #elif EITHER(MKS_MINI_12864, ENDER2_STOCKDISPLAY)
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
-    #define BTN_ENC                 EXPA1_09_PIN
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
+    #define BTN_ENC                  EXP1_09_PIN
 
-    #define DOGLCD_CS               EXPA1_04_PIN
-    #define DOGLCD_A0               EXPA1_05_PIN
-    #define DOGLCD_SCK              EXPA1_10_PIN
-    #define DOGLCD_MOSI             EXPA1_03_PIN
+    #define DOGLCD_CS                EXP1_04_PIN
+    #define DOGLCD_A0                EXP1_05_PIN
+    #define DOGLCD_SCK               EXP1_10_PIN
+    #define DOGLCD_MOSI              EXP1_03_PIN
     #define FORCE_SOFT_SPI
     #define LCD_BACKLIGHT_PIN              -1
 

Marlin/src/pins/ramps/pins_RAMPS.h

 #define X_DIR_PIN                             55
 #define X_ENABLE_PIN                          38
 #ifndef X_CS_PIN
-  #define X_CS_PIN                            53
+  #define X_CS_PIN                   EXP2_07_PIN
 #endif
 
 #define Y_STEP_PIN                            60
 #define Y_DIR_PIN                             61
 #define Y_ENABLE_PIN                          56
 #ifndef Y_CS_PIN
-  #define Y_CS_PIN                            49
+  #define Y_CS_PIN                   EXP2_04_PIN
 #endif
 
 #ifndef Z_STEP_PIN
 //
 // Misc. Functions
 //
-#define SDSS                                  53
+#define SDSS                         EXP2_07_PIN
 #define LED_PIN                               13
 
 #ifndef FILWIDTH_PIN
   #define E_MUX2_PIN                          44  // E1_CS_PIN
 #endif
 
+//
+// Aux 3 GND D52 D50 5V
+//       NC  D53 D51 D49
+
+//
+// Aux 4 D16 D17 D23 D25 D27 D29 D31 D33 D35 D37 D39 D41 D43 D45 D47 D32 GND 5V
+//
+
+/**
+ * LCD adapter. Please note: These comes in two variants. The socket keys can be
+ * on either side, and may be backwards on some boards / displays.
+ *         _____                           _____
+ *    D37 |10 9 | D35          (MISO) D50 |10 9 | D52 (SCK)
+ *    D17 | 8 7 | D16                 D31 | 8 7 | D53
+ *    D23   6 5   D25                 D33   6 5   D51 (MOSI)
+ *    D27 | 4 3 | D29                 D49 | 4 3 | D41
+ *    GND | 2 1 | 5V                  GND | 2 1 | NC
+ *         -----                           -----
+ *         EXP1                            EXP2
+ */
+
+#ifndef EXP1_03_PIN
+  #define EXP1_03_PIN                         29
+  #define EXP1_04_PIN                         27
+  #define EXP1_05_PIN                         25
+  #define EXP1_06_PIN                         23
+  #define EXP1_07_PIN                         16
+  #define EXP1_08_PIN                         17
+  #define EXP1_09_PIN                         35
+  #define EXP1_10_PIN                         37
+
+  #define EXP2_03_PIN                         41
+  #define EXP2_04_PIN                         49
+  #define EXP2_05_PIN                         51
+  #define EXP2_06_PIN                         33
+  #define EXP2_07_PIN                         53
+  #define EXP2_08_PIN                         31
+  #define EXP2_09_PIN                         52
+  #define EXP2_10_PIN                         50
+#endif
+
 //////////////////////////
 // LCDs and Controllers //
 //////////////////////////
 
+// GLCD features
+// Uncomment screen orientation
+//#define LCD_SCREEN_ROT_90
+//#define LCD_SCREEN_ROT_180
+//#define LCD_SCREEN_ROT_270
+
 #if HAS_WIRED_LCD
 
   //
   //
   #if ENABLED(REPRAPWORLD_GRAPHICAL_LCD)
 
-    #define LCD_PINS_RS                       49  // CS chip select /SS chip slave select
-    #define LCD_PINS_ENABLE                   51  // SID (MOSI)
-    #define LCD_PINS_D4                       52  // SCK (CLK) clock
+    #define LCD_PINS_RS              EXP2_04_PIN  // CS chip select /SS chip slave select
+    #define LCD_PINS_ENABLE          EXP2_05_PIN  // SID (MOSI)
+    #define LCD_PINS_D4              EXP2_09_PIN  // SCK (CLK) clock
 
   #elif BOTH(IS_NEWPANEL, PANEL_ONE)
 
 
   #elif ENABLED(TFTGLCD_PANEL_SPI)
 
-    #define TFTGLCD_CS                        33
+    #define TFTGLCD_CS               EXP2_06_PIN
 
   #else
 
     #if ENABLED(CR10_STOCKDISPLAY)
 
-      #define LCD_PINS_RS                     27
-      #define LCD_PINS_ENABLE                 29
-      #define LCD_PINS_D4                     25
+      #define LCD_PINS_RS            EXP1_04_PIN
+      #define LCD_PINS_ENABLE        EXP1_03_PIN
+      #define LCD_PINS_D4            EXP1_05_PIN
 
       #if !IS_NEWPANEL
-        #define BEEPER_PIN                    37
+        #define BEEPER_PIN           EXP1_10_PIN
       #endif
 
     #elif ENABLED(ZONESTAR_LCD)
     #else
 
       #if EITHER(MKS_12864OLED, MKS_12864OLED_SSD1306)
-        #define LCD_PINS_DC                   25  // Set as output on init
-        #define LCD_PINS_RS                   27  // Pull low for 1s to init
+        #define LCD_PINS_DC          EXP1_05_PIN  // Set as output on init
+        #define LCD_PINS_RS          EXP1_04_PIN  // Pull low for 1s to init
         // DOGM SPI LCD Support
         #define DOGLCD_A0            LCD_PINS_DC
-        #define DOGLCD_CS                     16
-        #define DOGLCD_MOSI                   17
-        #define DOGLCD_SCK                    23
+        #define DOGLCD_CS            EXP1_07_PIN
+        #define DOGLCD_MOSI          EXP1_08_PIN
+        #define DOGLCD_SCK           EXP1_06_PIN
       #else
-        #define LCD_PINS_RS                   16
-        #define LCD_PINS_ENABLE               17
-        #define LCD_PINS_D4                   23
-        #define LCD_PINS_D5                   25
-        #define LCD_PINS_D6                   27
+        #define LCD_PINS_RS          EXP1_07_PIN
+        #define LCD_PINS_ENABLE      EXP1_08_PIN
+        #define LCD_PINS_D4          EXP1_06_PIN
+        #define LCD_PINS_D5          EXP1_05_PIN
+        #define LCD_PINS_D6          EXP1_04_PIN
       #endif
 
-      #define LCD_PINS_D7                     29
+      #define LCD_PINS_D7            EXP1_03_PIN
 
       #if !IS_NEWPANEL
-        #define BEEPER_PIN                    33
+        #define BEEPER_PIN           EXP2_06_PIN
       #endif
 
     #endif
       //#define SHIFT_CLK_PIN                 38
       //#define SHIFT_LD_PIN                  42
       //#define SHIFT_OUT_PIN                 40
-      //#define SHIFT_EN_PIN                  17
+      //#define SHIFT_EN_PIN         EXP1_08_PIN
     #endif
 
   #endif
 
     #if IS_RRD_SC
 
-      #define BEEPER_PIN                      37
+      #define BEEPER_PIN             EXP1_10_PIN
 
       #if ENABLED(CR10_STOCKDISPLAY)
-        #define BTN_EN1                       17
-        #define BTN_EN2                       23
+        #define BTN_EN1              EXP1_08_PIN
+        #define BTN_EN2              EXP1_06_PIN
       #else
-        #define BTN_EN1                       31
-        #define BTN_EN2                       33
+        #define BTN_EN1              EXP2_08_PIN
+        #define BTN_EN2              EXP2_06_PIN
       #endif
 
-      #define BTN_ENC                         35
+      #define BTN_ENC                EXP1_09_PIN
       #ifndef SD_DETECT_PIN
-        #define SD_DETECT_PIN                 49
+        #define SD_DETECT_PIN        EXP2_04_PIN
       #endif
       #ifndef KILL_PIN
-        #define KILL_PIN                      41
+        #define KILL_PIN             EXP2_03_PIN
       #endif
 
       #if ENABLED(BQ_LCD_SMART_CONTROLLER)
       #define BTN_EN2                         43
       #define BTN_ENC                         32
       #define LCD_SDSS                      SDSS
-      #define KILL_PIN                        41
+      #define KILL_PIN               EXP2_03_PIN
 
     #elif ENABLED(LCD_I2C_VIKI)
 
       #define BTN_ENC                         -1
 
       #define LCD_SDSS                      SDSS
-      #define SD_DETECT_PIN                   49
+      #define SD_DETECT_PIN          EXP2_04_PIN
 
     #elif ANY(VIKI2, miniVIKI)
 
       #define DOGLCD_A0                       44
       #define LCD_SCREEN_ROT_180
 
-      #define BEEPER_PIN                      33
+      #define BEEPER_PIN             EXP2_06_PIN
       #define STAT_LED_RED_PIN                32
-      #define STAT_LED_BLUE_PIN               35
+      #define STAT_LED_BLUE_PIN      EXP1_09_PIN
 
       #define BTN_EN1                         22
       #define BTN_EN2                          7
       #define BTN_ENC                         39
 
       #define SD_DETECT_PIN                   -1  // Pin 49 for display SD interface, 72 for easy adapter board
-      #define KILL_PIN                        31
+      #define KILL_PIN               EXP2_08_PIN
 
     #elif ENABLED(ELB_FULL_GRAPHIC_CONTROLLER)
 
-      #define DOGLCD_CS                       29
-      #define DOGLCD_A0                       27
+      #define DOGLCD_CS              EXP1_03_PIN
+      #define DOGLCD_A0              EXP1_04_PIN
 
-      #define BEEPER_PIN                      23
-      #define LCD_BACKLIGHT_PIN               33
+      #define BEEPER_PIN             EXP1_06_PIN
+      #define LCD_BACKLIGHT_PIN      EXP2_06_PIN
 
-      #define BTN_EN1                         35
-      #define BTN_EN2                         37
-      #define BTN_ENC                         31
+      #define BTN_EN1                EXP1_09_PIN
+      #define BTN_EN2                EXP1_10_PIN
+      #define BTN_ENC                EXP2_08_PIN
 
       #define LCD_SDSS                      SDSS
-      #define SD_DETECT_PIN                   49
-      #define KILL_PIN                        41
+      #define SD_DETECT_PIN          EXP2_04_PIN
+      #define KILL_PIN               EXP2_03_PIN
 
     #elif EITHER(MKS_MINI_12864, FYSETC_MINI_12864)
 
-      #define BEEPER_PIN                      37
-      #define BTN_ENC                         35
-      #define SD_DETECT_PIN                   49
+      #define BEEPER_PIN             EXP1_10_PIN
+      #define BTN_ENC                EXP1_09_PIN
+      #define SD_DETECT_PIN          EXP2_04_PIN
 
       #ifndef KILL_PIN
-        #define KILL_PIN                      41
+        #define KILL_PIN             EXP2_03_PIN
       #endif
 
       #if ENABLED(MKS_MINI_12864)
 
-        #define DOGLCD_A0                     27
-        #define DOGLCD_CS                     25
-
-        // GLCD features
-        // Uncomment screen orientation
-        //#define LCD_SCREEN_ROT_90
-        //#define LCD_SCREEN_ROT_180
-        //#define LCD_SCREEN_ROT_270
+        #define DOGLCD_A0            EXP1_04_PIN
+        #define DOGLCD_CS            EXP1_05_PIN
 
         // not connected to a pin
         #define LCD_BACKLIGHT_PIN             -1  // 65 (MKS mini12864 can't adjust backlight by software!)
 
-        #define BTN_EN1                       31
-        #define BTN_EN2                       33
+        #define BTN_EN1              EXP2_08_PIN
+        #define BTN_EN2              EXP2_06_PIN
 
       #elif ENABLED(FYSETC_MINI_12864)
 
         // From https://wiki.fysetc.com/Mini12864_Panel/?fbclid=IwAR1FyjuNdVOOy9_xzky3qqo_WeM5h-4gpRnnWhQr_O1Ef3h0AFnFXmCehK8
 
-        #define DOGLCD_A0                     16
-        #define DOGLCD_CS                     17
+        #define DOGLCD_A0            EXP1_07_PIN
+        #define DOGLCD_CS            EXP1_08_PIN
 
-        #define BTN_EN1                       33
-        #define BTN_EN2                       31
+        #define BTN_EN1              EXP2_06_PIN
+        #define BTN_EN2              EXP2_08_PIN
 
         //#define FORCE_SOFT_SPI                  // Use this if default of hardware SPI causes display problems
                                                   //   results in LCD soft SPI mode 3, SD soft SPI mode 0
 
-        #define LCD_RESET_PIN                 23  // Must be high or open for LCD to operate normally.
+        #define LCD_RESET_PIN        EXP1_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             25
+            #define RGB_LED_R_PIN    EXP1_05_PIN
           #endif
           #ifndef RGB_LED_G_PIN
-            #define RGB_LED_G_PIN             27
+            #define RGB_LED_G_PIN    EXP1_04_PIN
           #endif
           #ifndef RGB_LED_B_PIN
-            #define RGB_LED_B_PIN             29
+            #define RGB_LED_B_PIN    EXP1_03_PIN
           #endif
         #elif ENABLED(FYSETC_MINI_12864_2_1)
-          #define NEOPIXEL_PIN                25
+          #define NEOPIXEL_PIN       EXP1_05_PIN
         #endif
 
       #endif
       #define DOGLCD_A0                       44
       #define DOGLCD_CS                       66
 
-      // GLCD features
-      // Uncomment screen orientation
-      //#define LCD_SCREEN_ROT_90
-      //#define LCD_SCREEN_ROT_180
-      //#define LCD_SCREEN_ROT_270
-
       #define BTN_EN1                         40
       #define BTN_EN2                         63
       #define BTN_ENC                         59
 
-      #define SD_DETECT_PIN                   49
+      #define SD_DETECT_PIN          EXP2_04_PIN
       #define KILL_PIN                        64
 
     #elif ENABLED(ZONESTAR_LCD)
 
     #elif IS_TFTGLCD_PANEL
 
-      #define SD_DETECT_PIN                   49
+      #define SD_DETECT_PIN          EXP2_04_PIN
 
     #else
 
       // Beeper on AUX-4
-      #define BEEPER_PIN                      33
+      #define BEEPER_PIN             EXP2_06_PIN
 
       // Buttons are directly attached to AUX-2
       #if ENABLED(PANEL_ONE)
         #define BTN_EN1                       59  // AUX2 PIN 3
         #define BTN_EN2                       63  // AUX2 PIN 4
-        #define BTN_ENC                       49  // AUX3 PIN 7
+        #define BTN_ENC              EXP2_04_PIN
       #else
-        #define BTN_EN1                       37
-        #define BTN_EN2                       35
-        #define BTN_ENC                       31
+        #define BTN_EN1              EXP1_10_PIN
+        #define BTN_EN2              EXP1_09_PIN
+        #define BTN_ENC              EXP2_08_PIN
       #endif
 
       #if ENABLED(G3D_PANEL)
-        #define SD_DETECT_PIN                 49
-        #define KILL_PIN                      41
+        #define SD_DETECT_PIN        EXP2_04_PIN
+        #define KILL_PIN             EXP2_03_PIN
       #endif
 
     #endif
 
   #error "CAUTION! LCD_FYSETC_TFT81050 requires wiring modifications. See 'pins_RAMPS.h' for details. Comment out this line to continue."
 
-  /** FYSETC TFT TFT81050 display pinout
+  /**
+   * FYSETC TFT-81050 display pinout
    *
    *               Board                                     Display
    *               _____                                     _____
    *   EXP2-7 ----------- EXP1-4
    *   EXP2-8 ----------- EXP1-3
    *   EXP2-1 ----------- EXP1-2
-   *  EXP1-10 ----------- EXP1-1
+   *   EXP1-10 ---------- EXP1-1
    *
    *  NOTE: The MISO pin should not get a 5V signal.
    *        To fix, insert a 1N4148 diode in the MISO line.
    */
 
-  #define BEEPER_PIN                          37
+  #define BEEPER_PIN                 EXP1_10_PIN
 
-  #define SD_DETECT_PIN                       49
+  #define SD_DETECT_PIN              EXP2_04_PIN
 
-  #define CLCD_MOD_RESET                      31
-  #define CLCD_SPI_CS                         33
+  #define CLCD_MOD_RESET             EXP2_08_PIN
+  #define CLCD_SPI_CS                EXP2_06_PIN
 #endif // TOUCH_UI_FTDI_EVE && LCD_FYSETC_TFT81050

Marlin/src/pins/stm32f4/pins_BTT_SKR_PRO_common.h

  *               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
+#define EXP1_03_PIN                         PG7
+#define EXP1_04_PIN                         PG6
+#define EXP1_05_PIN                         PG3
+#define EXP1_06_PIN                         PG2
+#define EXP1_07_PIN                         PD10
+#define EXP1_08_PIN                         PD11
+#define EXP1_09_PIN                         PA8
+#define EXP1_10_PIN                         PG4
+
+#define EXP2_03_PIN                         -1
+#define EXP2_04_PIN                         PF12
+#define EXP2_05_PIN                         PB15
+#define EXP2_06_PIN                         PF11
+#define EXP2_07_PIN                         PB12
+#define EXP2_08_PIN                         PG10
+#define EXP2_09_PIN                         PB13
+#define EXP2_10_PIN                         PB14
 
 //
 // Onboard SD card
 //
 #if SD_CONNECTION_IS(LCD)
 
-  #define SD_DETECT_PIN             EXPA2_04_PIN
-  #define SDSS                      EXPA2_07_PIN
+  #define SD_DETECT_PIN              EXP2_04_PIN
+  #define SDSS                       EXP2_07_PIN
 
 #elif SD_CONNECTION_IS(ONBOARD)
 
    */
 
   // 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
+  #define E3_STEP_PIN                EXP2_05_PIN
+  #define E3_DIR_PIN                 EXP2_06_PIN
+  #define E3_ENABLE_PIN              EXP2_04_PIN
+  #define E3_DIAG_PIN                EXP1_06_PIN
+  #define E3_CS_PIN                  EXP1_05_PIN
   #if HAS_TMC_UART
-    #define E3_SERIAL_TX_PIN        EXPA1_05_PIN
-    #define E3_SERIAL_RX_PIN        EXPA1_05_PIN
+    #define E3_SERIAL_TX_PIN         EXP1_05_PIN
+    #define E3_SERIAL_RX_PIN         EXP1_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
+  #define E4_STEP_PIN                EXP2_08_PIN
+  #define E4_DIR_PIN                 EXP2_07_PIN
+  #define E4_ENABLE_PIN              EXP1_03_PIN
+  #define E4_DIAG_PIN                EXP1_08_PIN
+  #define E4_CS_PIN                  EXP1_07_PIN
   #if HAS_TMC_UART
-    #define E4_SERIAL_TX_PIN        EXPA1_07_PIN
-    #define E4_SERIAL_RX_PIN        EXPA1_07_PIN
+    #define E4_SERIAL_TX_PIN         EXP1_07_PIN
+    #define E4_SERIAL_RX_PIN         EXP1_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
+  #define E5_STEP_PIN                EXP2_10_PIN
+  #define E5_DIR_PIN                 EXP2_09_PIN
+  #define E5_ENABLE_PIN              EXP1_04_PIN
+  #define E5_DIAG_PIN                EXP1_10_PIN
+  #define E5_CS_PIN                  EXP1_09_PIN
   #if HAS_TMC_UART
-    #define E5_SERIAL_TX_PIN        EXPA1_09_PIN
-    #define E5_SERIAL_RX_PIN        EXPA1_09_PIN
+    #define E5_SERIAL_TX_PIN         EXP1_09_PIN
+    #define E5_SERIAL_RX_PIN         EXP1_09_PIN
   #endif
 
 #endif // BTT_MOTOR_EXPANSION
 #if IS_TFTGLCD_PANEL
 
   #if ENABLED(TFTGLCD_PANEL_SPI)
-    #define TFTGLCD_CS              EXPA2_08_PIN
+    #define TFTGLCD_CS               EXP2_08_PIN
   #endif
 
 #elif HAS_WIRED_LCD
 
-  #define BEEPER_PIN                EXPA1_10_PIN
-  #define BTN_ENC                   EXPA1_09_PIN
+  #define BEEPER_PIN                 EXP1_10_PIN
+  #define BTN_ENC                    EXP1_09_PIN
 
   #if ENABLED(CR10_STOCKDISPLAY)
 
-    #define LCD_PINS_RS             EXPA1_04_PIN
+    #define LCD_PINS_RS              EXP1_04_PIN
 
-    #define BTN_EN1                 EXPA1_08_PIN
-    #define BTN_EN2                 EXPA1_06_PIN
+    #define BTN_EN1                  EXP1_08_PIN
+    #define BTN_EN2                  EXP1_06_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_03_PIN
-    #define LCD_PINS_D4             EXPA1_05_PIN
+    #define LCD_PINS_ENABLE          EXP1_03_PIN
+    #define LCD_PINS_D4              EXP1_05_PIN
 
     // CR10_STOCKDISPLAY default timing is too fast
     #undef BOARD_ST7920_DELAY_1
 
   #elif ENABLED(MKS_MINI_12864)
 
-    #define DOGLCD_A0               EXPA1_04_PIN
-    #define DOGLCD_CS               EXPA1_05_PIN
-    #define BTN_EN1                 EXPA2_08_PIN
-    #define BTN_EN2                 EXPA2_06_PIN
+    #define DOGLCD_A0                EXP1_04_PIN
+    #define DOGLCD_CS                EXP1_05_PIN
+    #define BTN_EN1                  EXP2_08_PIN
+    #define BTN_EN2                  EXP2_06_PIN
 
   #else
 
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA2_08_PIN
-    #define BTN_EN2                 EXPA2_06_PIN
+    #define BTN_EN1                  EXP2_08_PIN
+    #define BTN_EN2                  EXP2_06_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
 
     #if ENABLED(FYSETC_MINI_12864)
-      #define DOGLCD_CS             EXPA1_08_PIN
-      #define DOGLCD_A0             EXPA1_07_PIN
+      #define DOGLCD_CS              EXP1_08_PIN
+      #define DOGLCD_A0              EXP1_07_PIN
       //#define LCD_BACKLIGHT_PIN           -1
-      #define LCD_RESET_PIN         EXPA1_06_PIN  // Must be high or open for LCD to operate normally.
+      #define LCD_RESET_PIN          EXP1_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     EXPA1_05_PIN
+          #define RGB_LED_R_PIN      EXP1_05_PIN
         #endif
         #ifndef RGB_LED_G_PIN
-          #define RGB_LED_G_PIN     EXPA1_04_PIN
+          #define RGB_LED_G_PIN      EXP1_04_PIN
         #endif
         #ifndef RGB_LED_B_PIN
-          #define RGB_LED_B_PIN     EXPA1_03_PIN
+          #define RGB_LED_B_PIN      EXP1_03_PIN
         #endif
       #elif ENABLED(FYSETC_MINI_12864_2_1)
-        #define NEOPIXEL_PIN        EXPA1_05_PIN
+        #define NEOPIXEL_PIN         EXP1_05_PIN
       #endif
     #endif // !FYSETC_MINI_12864
 
     #if IS_ULTIPANEL
-      #define LCD_PINS_D5           EXPA1_05_PIN
-      #define LCD_PINS_D6           EXPA1_04_PIN
-      #define LCD_PINS_D7           EXPA1_03_PIN
+      #define LCD_PINS_D5            EXP1_05_PIN
+      #define LCD_PINS_D6            EXP1_04_PIN
+      #define LCD_PINS_D7            EXP1_03_PIN
 
       #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
         #define BTN_ENC_EN           LCD_PINS_D7  // Detect the presence of the encoder

Marlin/src/pins/stm32f4/pins_FYSETC_CHEETAH_V20.h

 *                 EXP3
 */
 
-#define EXPA1_03_PIN                        PB7
-#define EXPA1_04_PIN                        PB6
-#define EXPA1_05_PIN                        PB14
-#define EXPA1_06_PIN                        PB13
-#define EXPA1_07_PIN                        PB12
-#define EXPA1_08_PIN                        PB15
-#define EXPA1_09_PIN                        PC12
-#define EXPA1_10_PIN                        PC9
-
-#define EXPA2_03_PIN                        -1
-#define EXPA2_04_PIN                        PC3
-#define EXPA2_05_PIN                        PA7
-#define EXPA2_06_PIN                        PC11
-#define EXPA2_07_PIN                        PA4
-#define EXPA2_08_PIN                        PC10
-#define EXPA2_09_PIN                        PA5
-#define EXPA2_10_PIN                        PA6
+#define EXP1_03_PIN                         PB7
+#define EXP1_04_PIN                         PB6
+#define EXP1_05_PIN                         PB14
+#define EXP1_06_PIN                         PB13
+#define EXP1_07_PIN                         PB12
+#define EXP1_08_PIN                         PB15
+#define EXP1_09_PIN                         PC12
+#define EXP1_10_PIN                         PC9
+
+#define EXP2_03_PIN                         -1
+#define EXP2_04_PIN                         PC3
+#define EXP2_05_PIN                         PA7
+#define EXP2_06_PIN                         PC11
+#define EXP2_07_PIN                         PA4
+#define EXP2_08_PIN                         PC10
+#define EXP2_09_PIN                         PA5
+#define EXP2_10_PIN                         PA6
 
 #if HAS_WIRED_LCD
 
-  #define BEEPER_PIN                EXPA1_10_PIN
-  #define BTN_ENC                   EXPA1_09_PIN
+  #define BEEPER_PIN                 EXP1_10_PIN
+  #define BTN_ENC                    EXP1_09_PIN
 
   #if ENABLED(CR10_STOCKDISPLAY)
 
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA2_08_PIN
-    #define BTN_EN2                 EXPA2_06_PIN
+    #define BTN_EN1                  EXP2_08_PIN
+    #define BTN_EN2                  EXP2_06_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
 
     // CR10_STOCKDISPLAY default timing is too fast
     #undef BOARD_ST7920_DELAY_1
 
   #elif ENABLED(MKS_MINI_12864)
 
-    #define DOGLCD_A0               EXPA1_04_PIN
-    #define DOGLCD_CS               EXPA1_05_PIN
-    #define BTN_EN1                 EXPA2_08_PIN
-    #define BTN_EN2                 EXPA2_06_PIN
+    #define DOGLCD_A0                EXP1_04_PIN
+    #define DOGLCD_CS                EXP1_05_PIN
+    #define BTN_EN1                  EXP2_08_PIN
+    #define BTN_EN2                  EXP2_06_PIN
 
   #else
 
-    #define LCD_PINS_RS             EXPA1_07_PIN
+    #define LCD_PINS_RS              EXP1_07_PIN
 
-    #define BTN_EN1                 EXPA2_06_PIN
-    #define BTN_EN2                 EXPA2_08_PIN
+    #define BTN_EN1                  EXP2_06_PIN
+    #define BTN_EN2                  EXP2_08_PIN
 
-    #define LCD_PINS_ENABLE         EXPA1_08_PIN
-    #define LCD_PINS_D4             EXPA1_06_PIN
+    #define LCD_PINS_ENABLE          EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
 
     #if ENABLED(FYSETC_MINI_12864)
-      #define DOGLCD_CS             EXPA1_08_PIN
-      #define DOGLCD_A0             EXPA1_07_PIN
+      #define DOGLCD_CS              EXP1_08_PIN
+      #define DOGLCD_A0              EXP1_07_PIN
       //#define LCD_BACKLIGHT_PIN           -1
-      #define LCD_RESET_PIN         EXPA1_06_PIN  // Must be high or open for LCD to operate normally.
+      #define LCD_RESET_PIN          EXP1_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     EXPA1_05_PIN
+          #define RGB_LED_R_PIN      EXP1_05_PIN
         #endif
         #ifndef RGB_LED_G_PIN
-          #define RGB_LED_G_PIN     EXPA1_04_PIN
+          #define RGB_LED_G_PIN      EXP1_04_PIN
         #endif
         #ifndef RGB_LED_B_PIN
-          #define RGB_LED_B_PIN     EXPA1_03_PIN
+          #define RGB_LED_B_PIN      EXP1_03_PIN
         #endif
       #elif ENABLED(FYSETC_MINI_12864_2_1)
-        #define NEOPIXEL_PIN        EXPA1_05_PIN
+        #define NEOPIXEL_PIN         EXP1_05_PIN
       #endif
     #endif // !FYSETC_MINI_12864
 
     #if IS_ULTIPANEL
-      #define LCD_PINS_D5           EXPA1_05_PIN
-      #define LCD_PINS_D6           EXPA1_04_PIN
-      #define LCD_PINS_D7           EXPA1_03_PIN
+      #define LCD_PINS_D5            EXP1_05_PIN
+      #define LCD_PINS_D6            EXP1_04_PIN
+      #define LCD_PINS_D7            EXP1_03_PIN
 
       #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
         #define BTN_ENC_EN           LCD_PINS_D7  // Detect the presence of the encoder
 #endif
 
 #if ENABLED(TOUCH_UI_FTDI_EVE)
-  #define BEEPER_PIN                EXPA1_10_PIN
-  #define CLCD_MOD_RESET            EXPA2_08_PIN
-  #define CLCD_SPI_CS               EXPA2_06_PIN
+  #define BEEPER_PIN                 EXP1_10_PIN
+  #define CLCD_MOD_RESET             EXP2_08_PIN
+  #define CLCD_SPI_CS                EXP2_06_PIN
 #endif