Use limit switch overrides

Marlin/src/pins/pins_AZTEEG_X3.h

@@ -37,16 +37,14 @@
 #endif
 #define BOARD_NAME "Azteeg X3"
 
-#include "pins_RAMPS_13.h"
-
 //
 // Servos
 //
-#undef SERVO0_PIN
-#undef SERVO1_PIN
 #define SERVO0_PIN         44   // SERVO1 port
 #define SERVO1_PIN         55   // SERVO2 port
 
+#include "pins_RAMPS_13.h"
+
 //
 // LCD / Controller
 //

Marlin/src/pins/pins_AZTEEG_X3_PRO.h

@@ -37,14 +37,33 @@
 //
 // RAMPS pins overrides
 //
-#if ENABLED(CASE_LIGHT_ENABLE) && !PIN_EXISTS(CASE_LIGHT)
-  #define CASE_LIGHT_PIN   44
-#endif
+
+//
+// Servos
+//
+// Tested this pin with bed leveling on a Delta with 1 servo.
+// Physical wire attachment on EXT1: GND, 5V, D47.
+//
+#define SERVO0_PIN         47
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN          3
+#define Y_STOP_PIN         14
+#define Z_STOP_PIN         18
 
 #ifndef FAN_PIN
   #define FAN_PIN           6
 #endif
 
+#if ENABLED(CASE_LIGHT_ENABLE) && !PIN_EXISTS(CASE_LIGHT)
+  #define CASE_LIGHT_PIN   44
+#endif
+
+//
+// Import RAMPS 1.4 pins
+//
 #include "pins_RAMPS.h"
 
 // DIGIPOT slave addresses
@@ -55,37 +74,6 @@
   #define DIGIPOT_I2C_ADDRESS_B 0x2E   // unshifted slave address for second DIGIPOT 0x2E (0x5C <- 0x2E << 1)
 #endif
 
-//
-// Servos
-//
-// Tested this pin with bed leveling on a Delta with 1 servo.
-// Physical wire attachment on EXT1: GND, 5V, D47.
-//
-#undef SERVO0_PIN
-#define SERVO0_PIN         47
-
-//
-// Limit Switches
-//
-// Swap the MIN and MAX endstop pins because the X3 Pro comes with only
-// MIN endstop pin headers soldered onto the board.
-//
-#if ENABLED(DELTA)
-  #undef X_MIN_PIN
-  #undef X_MAX_PIN
-  #undef Y_MIN_PIN
-  #undef Y_MAX_PIN
-  #undef Z_MIN_PIN
-  #undef Z_MAX_PIN
-
-  #define X_MIN_PIN         2
-  #define X_MAX_PIN         3
-  #define Y_MIN_PIN        15
-  #define Y_MAX_PIN        14
-  #define Z_MIN_PIN        19
-  #define Z_MAX_PIN        18
-#endif
-
 //
 // Z Probe (when not Z_MIN_PIN)
 //

Marlin/src/pins/pins_BQ_ZUM_MEGA_3D.h

@@ -53,14 +53,16 @@
 #define SPINDLE_LASER_PWM_PIN    44   // MUST BE HARDWARE PWM
 #define SPINDLE_DIR_PIN          42
 
-#include "pins_RAMPS_13.h"
-
 //
 // Limit Switches
 //
-#undef X_MAX_PIN
 #define X_MAX_PIN          79   // 2
 
+//
+// Import RAMPS 1.3 pins
+//
+#include "pins_RAMPS_13.h"
+
 //
 // Z Probe (when not Z_MIN_PIN)
 //

Marlin/src/pins/pins_GT2560_V3.h

@@ -40,12 +40,30 @@
 //
 // Limit Switches
 //
-#define X_MIN_PIN          24
-#define X_MAX_PIN          22
-#define Y_MIN_PIN          28
-#define Y_MAX_PIN          26
-#define Z_MIN_PIN          30
-#define Z_MAX_PIN          32
+#ifndef X_STOP_PIN
+  #ifndef X_MIN_PIN
+    #define X_MIN_PIN      24
+  #endif
+  #ifndef X_MAX_PIN
+    #define X_MAX_PIN      22
+  #endif
+#endif
+#ifndef Y_STOP_PIN
+  #ifndef Y_MIN_PIN
+    #define Y_MIN_PIN      28
+  #endif
+  #ifndef Y_MAX_PIN
+    #define Y_MAX_PIN      26
+  #endif
+#endif
+#ifndef Z_STOP_PIN
+  #ifndef Z_MIN_PIN
+    #define Z_MIN_PIN      30
+  #endif
+  #ifndef Z_MAX_PIN
+    #define Z_MAX_PIN      32
+  #endif
+#endif
 
 //
 // Z Probe (when not Z_MIN_PIN)

Marlin/src/pins/pins_GT2560_V3_MC2.h

@@ -26,16 +26,9 @@
 
 #define BOARD_NAME "GT2560 V3.0 (MC2)"
 
-#include "pins_GT2560_V3.h"
-
-#undef X_MIN_PIN
 #define X_MIN_PIN          22
-
-#undef X_MAX_PIN
 #define X_MAX_PIN          24
-
-#undef Y_MIN_PIN
 #define Y_MIN_PIN          26
-
-#undef Y_MAX_PIN
 #define Y_MAX_PIN          28
+
+#include "pins_GT2560_V3.h"

Marlin/src/pins/pins_MELZI_CREALITY.h

@@ -45,13 +45,12 @@
 #undef LCD_PINS_D5
 #undef LCD_PINS_D6
 #undef LCD_PINS_D7
-#undef FIL_RUNOUT_PIN
+#undef FIL_RUNOUT_PIN           // Uses Beeper/LED Pin Pulled to GND
 
 #define LCD_SDSS           31   // Smart Controller SD card reader (rather than the Melzi)
 #define LCD_PINS_RS        28   // ST9720 CS
 #define LCD_PINS_ENABLE    17   // ST9720 DAT
 #define LCD_PINS_D4        30   // ST9720 CLK
-#define FIL_RUNOUT_PIN     -1   // Uses Beeper/LED Pin Pulled to GND
 
 #if DISABLED(SPEAKER) && ENABLED(BLTOUCH)
   #define SERVO0_PIN 27

Marlin/src/pins/pins_RAMPS.h

@@ -83,23 +83,29 @@
 //
 // Limit Switches
 //
-#ifndef X_MIN_PIN
-  #define X_MIN_PIN         3
+#ifndef X_STOP_PIN
+  #ifndef X_MIN_PIN
+    #define X_MIN_PIN       3
+  #endif
+  #ifndef X_MAX_PIN
+    #define X_MAX_PIN       2
+  #endif
 #endif
-#ifndef X_MAX_PIN
-  #define X_MAX_PIN         2
+#ifndef Y_STOP_PIN
+  #ifndef Y_MIN_PIN
+    #define Y_MIN_PIN      14
+  #endif
+  #ifndef Y_MAX_PIN
+    #define Y_MAX_PIN      15
+  #endif
 #endif
-#ifndef Y_MIN_PIN
-  #define Y_MIN_PIN        14
-#endif
-#ifndef Y_MAX_PIN
-  #define Y_MAX_PIN        15
-#endif
-#ifndef Z_MIN_PIN
-  #define Z_MIN_PIN        18
-#endif
-#ifndef Z_MAX_PIN
-  #define Z_MAX_PIN          19
+#ifndef Z_STOP_PIN
+  #ifndef Z_MIN_PIN
+    #define Z_MIN_PIN      18
+  #endif
+  #ifndef Z_MAX_PIN
+    #define Z_MAX_PIN      19
+  #endif
 #endif
 
 //

Marlin/src/pins/pins_RAMPS_DAGOMA.h

@@ -26,20 +26,14 @@
 
 #define BOARD_NAME "Dagoma3D F5 RAMPS"
 
-#ifdef E0_AUTO_FAN_PIN
-  #undef E0_AUTO_FAN_PIN
-#endif
+#define X_STOP_PIN          2
+#define Y_STOP_PIN          3
+#define Z_STOP_PIN         15
+#define FIL_RUNOUT_PIN     39
 
-#define E0_AUTO_FAN_PIN 7
-
-#define X_MAX_PIN -1
-#define X_MIN_PIN 2
-#define Y_MAX_PIN 3
-#define Y_MIN_MIN -1
-#define Z_MAX_PIN -1
-#define Z_MIN_PIN 15
-#define FILRUNOUT_PIN 39
-#define MOSFET_D_PIN -1
+#define ORIG_E0_AUTO_FAN_PIN 7
 
+//
+// Import RAMPS 1.4 pins
+//
 #include "pins_RAMPS.h"
-

Marlin/src/pins/pins_TRONXY_V3_1_0.h

@@ -34,14 +34,16 @@
 
 #define BOARD_NAME "TRONXY-V3-1.0"
 
-#include "pins_RAMPS.h"
-
 //
 // Servos
 //
-#undef SERVO1_PIN
 #define SERVO1_PIN         12   // 2560 PIN 25/PB6
 
+//
+// Import RAMPS 1.4 pins
+//
+#include "pins_RAMPS.h"
+
 /**
  * @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  *