Fix BTT GTR 1.0 endstop/DIAG pins (#20296)

Author: ellensp

Marlin/src/pins/stm32f4/pins_BTT_GTR_V1_0.h

@@ -46,15 +46,54 @@
 
 #define PS_ON_PIN                           PH6
 
+//
+// Trinamic Stallguard pins
+//
+#define X_DIAG_PIN                          PF2   // X-
+#define Y_DIAG_PIN                          PC13  // Y-
+#define Z_DIAG_PIN                          PE0   // Z-
+#define E0_DIAG_PIN                         PG14  // X+
+#define E1_DIAG_PIN                         PG9   // Y+
+#define E2_DIAG_PIN                         PD3   // Z+
+
 //
 // Limit Switches
 //
-#define X_MIN_PIN                           PF2
-#define X_MAX_PIN                           PG14
-#define Y_MIN_PIN                           PC13
-#define Y_MAX_PIN                           PG9
-#define Z_MIN_PIN                           PE0
-#define Z_MAX_PIN                           PD3
+#ifdef X_STALL_SENSITIVITY
+  #define X_STOP_PIN                        X_DIAG_PIN
+  #if X_HOME_DIR < 0
+    #define X_MAX_PIN                       E0_DIAG_PIN  // X+
+  #else
+    #define X_MIN_PIN                       E0_DIAG_PIN  // X+
+  #endif
+#else
+  #define X_MIN_PIN                         X_DIAG_PIN   // X-
+  #define X_MAX_PIN                         E0_DIAG_PIN  // X+
+#endif
+
+#ifdef Y_STALL_SENSITIVITY
+  #define Y_STOP_PIN                        Y_DIAG_PIN
+  #if Y_HOME_DIR < 0
+    #define Y_MAX_PIN                       E1_DIAG_PIN  // Y+
+  #else
+    #define Y_MIN_PIN                       E1_DIAG_PIN  // Y+
+  #endif
+#else
+  #define Y_MIN_PIN                         Y_DIAG_PIN   // Y-
+  #define Y_MAX_PIN                         E1_DIAG_PIN  // Y+
+#endif
+
+#ifdef Z_STALL_SENSITIVITY
+  #define Z_STOP_PIN                        Z_DIAG_PIN
+  #if Z_HOME_DIR < 0
+    #define Z_MAX_PIN                       E2_DIAG_PIN  // Z+
+  #else
+    #define Z_MIN_PIN                       E2_DIAG_PIN  // Z+
+  #endif
+#else
+  #define Z_MIN_PIN                         Z_DIAG_PIN   // Z-
+  #define Z_MAX_PIN                         E2_DIAG_PIN  // Z+
+#endif
 
 //
 // Pins on the extender