Simplify / undef extra endstops (#21808)

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

Marlin/src/inc/Conditionals_post.h

 #if _HAS_STOP(Z,MAX)
   #define HAS_Z_MAX 1
 #endif
-#if _HAS_STOP(X,STOP)
-  #define HAS_X_STOP 1
-#endif
-#if _HAS_STOP(Y,STOP)
-  #define HAS_Y_STOP 1
-#endif
-#if _HAS_STOP(Z,STOP)
-  #define HAS_Z_STOP 1
-#endif
 #if PIN_EXISTS(X2_MIN)
   #define HAS_X2_MIN 1
 #endif
 #if PIN_EXISTS(Z4_MAX)
   #define HAS_Z4_MAX 1
 #endif
-#if HAS_CUSTOM_PROBE_PIN && PIN_EXISTS(Z_MIN_PROBE)
+#if BOTH(HAS_BED_PROBE, HAS_CUSTOM_PROBE_PIN) && PIN_EXISTS(Z_MIN_PROBE)
   #define HAS_Z_MIN_PROBE_PIN 1
 #endif
 
+#undef IS_PROBE_PIN
+#undef IS_X2_ENDSTOP
+#undef IS_Y2_ENDSTOP
+#undef IS_Z2_ENDSTOP
+#undef IS_Z3_ENDSTOP
+#undef IS_Z4_ENDSTOP
+
 //
 // ADC Temp Sensors (Thermistor or Thermocouple with amplifier ADC interface)
 //

Marlin/src/inc/SanityCheck.h

 
 // Dual/multiple endstops requirements
 #if ENABLED(X_DUAL_ENDSTOPS)
-  #if !X2_USE_ENDSTOP
-    #error "You must set X2_USE_ENDSTOP with X_DUAL_ENDSTOPS."
-  #elif X2_USE_ENDSTOP == _XMIN_ && DISABLED(USE_XMIN_PLUG)
-    #error "USE_XMIN_PLUG is required when X2_USE_ENDSTOP is _XMIN_."
-  #elif X2_USE_ENDSTOP == _XMAX_ && DISABLED(USE_XMAX_PLUG)
-    #error "USE_XMAX_PLUG is required when X2_USE_ENDSTOP is _XMAX_."
-  #elif X2_USE_ENDSTOP == _YMIN_ && DISABLED(USE_YMIN_PLUG)
-    #error "USE_YMIN_PLUG is required when X2_USE_ENDSTOP is _YMIN_."
-  #elif X2_USE_ENDSTOP == _YMAX_ && DISABLED(USE_YMAX_PLUG)
-    #error "USE_YMAX_PLUG is required when X2_USE_ENDSTOP is _YMAX_."
-  #elif X2_USE_ENDSTOP == _ZMIN_ && DISABLED(USE_ZMIN_PLUG)
-    #error "USE_ZMIN_PLUG is required when X2_USE_ENDSTOP is _ZMIN_."
-  #elif X2_USE_ENDSTOP == _ZMAX_ && DISABLED(USE_ZMAX_PLUG)
-    #error "USE_ZMAX_PLUG is required when X2_USE_ENDSTOP is _ZMAX_."
-  #elif !HAS_X2_MIN && !HAS_X2_MAX
-    #error "X2_USE_ENDSTOP has been assigned to a nonexistent endstop!"
-  #elif ENABLED(DELTA)
+  #if ENABLED(DELTA)
     #error "X_DUAL_ENDSTOPS is not compatible with DELTA."
+  #elif !X2_USE_ENDSTOP
+    #error "X2_USE_ENDSTOP must be set with X_DUAL_ENDSTOPS."
   #endif
 #endif
 #if ENABLED(Y_DUAL_ENDSTOPS)
-  #if !Y2_USE_ENDSTOP
-    #error "You must set Y2_USE_ENDSTOP with Y_DUAL_ENDSTOPS."
-  #elif Y2_USE_ENDSTOP == _XMIN_ && DISABLED(USE_XMIN_PLUG)
-    #error "USE_XMIN_PLUG is required when Y2_USE_ENDSTOP is _XMIN_."
-  #elif Y2_USE_ENDSTOP == _XMAX_ && DISABLED(USE_XMAX_PLUG)
-    #error "USE_XMAX_PLUG is required when Y2_USE_ENDSTOP is _XMAX_."
-  #elif Y2_USE_ENDSTOP == _YMIN_ && DISABLED(USE_YMIN_PLUG)
-    #error "USE_YMIN_PLUG is required when Y2_USE_ENDSTOP is _YMIN_."
-  #elif Y2_USE_ENDSTOP == _YMAX_ && DISABLED(USE_YMAX_PLUG)
-    #error "USE_YMAX_PLUG is required when Y2_USE_ENDSTOP is _YMAX_."
-  #elif Y2_USE_ENDSTOP == _ZMIN_ && DISABLED(USE_ZMIN_PLUG)
-    #error "USE_ZMIN_PLUG is required when Y2_USE_ENDSTOP is _ZMIN_."
-  #elif Y2_USE_ENDSTOP == _ZMAX_ && DISABLED(USE_ZMAX_PLUG)
-    #error "USE_ZMAX_PLUG is required when Y2_USE_ENDSTOP is _ZMAX_."
-  #elif !HAS_Y2_MIN && !HAS_Y2_MAX
-    #error "Y2_USE_ENDSTOP has been assigned to a nonexistent endstop!"
-  #elif ENABLED(DELTA)
+  #if ENABLED(DELTA)
     #error "Y_DUAL_ENDSTOPS is not compatible with DELTA."
+  #elif !Y2_USE_ENDSTOP
+    #error "Y2_USE_ENDSTOP must be set with Y_DUAL_ENDSTOPS."
   #endif
 #endif
-
 #if ENABLED(Z_MULTI_ENDSTOPS)
-  #if !Z2_USE_ENDSTOP
-    #error "You must set Z2_USE_ENDSTOP with Z_MULTI_ENDSTOPS when NUM_Z_STEPPER_DRIVERS >= 2."
-  #elif Z2_USE_ENDSTOP == _XMIN_ && DISABLED(USE_XMIN_PLUG)
-    #error "USE_XMIN_PLUG is required when Z2_USE_ENDSTOP is _XMIN_."
-  #elif Z2_USE_ENDSTOP == _XMAX_ && DISABLED(USE_XMAX_PLUG)
-    #error "USE_XMAX_PLUG is required when Z2_USE_ENDSTOP is _XMAX_."
-  #elif Z2_USE_ENDSTOP == _YMIN_ && DISABLED(USE_YMIN_PLUG)
-    #error "USE_YMIN_PLUG is required when Z2_USE_ENDSTOP is _YMIN_."
-  #elif Z2_USE_ENDSTOP == _YMAX_ && DISABLED(USE_YMAX_PLUG)
-    #error "USE_YMAX_PLUG is required when Z2_USE_ENDSTOP is _YMAX_."
-  #elif Z2_USE_ENDSTOP == _ZMIN_ && DISABLED(USE_ZMIN_PLUG)
-    #error "USE_ZMIN_PLUG is required when Z2_USE_ENDSTOP is _ZMIN_."
-  #elif Z2_USE_ENDSTOP == _ZMAX_ && DISABLED(USE_ZMAX_PLUG)
-    #error "USE_ZMAX_PLUG is required when Z2_USE_ENDSTOP is _ZMAX_."
-  #elif !HAS_Z2_MIN && !HAS_Z2_MAX
-    #error "Z2_USE_ENDSTOP has been assigned to a nonexistent endstop!"
-  #elif ENABLED(DELTA)
+  #if ENABLED(DELTA)
     #error "Z_MULTI_ENDSTOPS is not compatible with DELTA."
-  #endif
-  #if NUM_Z_STEPPER_DRIVERS >= 3
-    #if !Z3_USE_ENDSTOP
-      #error "You must set Z3_USE_ENDSTOP with Z_MULTI_ENDSTOPS when NUM_Z_STEPPER_DRIVERS >= 3."
-    #elif Z3_USE_ENDSTOP == _XMIN_ && DISABLED(USE_XMIN_PLUG)
-      #error "USE_XMIN_PLUG is required when Z3_USE_ENDSTOP is _XMIN_."
-    #elif Z3_USE_ENDSTOP == _XMAX_ && DISABLED(USE_XMAX_PLUG)
-      #error "USE_XMAX_PLUG is required when Z3_USE_ENDSTOP is _XMAX_."
-    #elif Z3_USE_ENDSTOP == _YMIN_ && DISABLED(USE_YMIN_PLUG)
-      #error "USE_YMIN_PLUG is required when Z3_USE_ENDSTOP is _YMIN_."
-    #elif Z3_USE_ENDSTOP == _YMAX_ && DISABLED(USE_YMAX_PLUG)
-      #error "USE_YMAX_PLUG is required when Z3_USE_ENDSTOP is _YMAX_."
-    #elif Z3_USE_ENDSTOP == _ZMIN_ && DISABLED(USE_ZMIN_PLUG)
-      #error "USE_ZMIN_PLUG is required when Z3_USE_ENDSTOP is _ZMIN_."
-    #elif Z3_USE_ENDSTOP == _ZMAX_ && DISABLED(USE_ZMAX_PLUG)
-      #error "USE_ZMAX_PLUG is required when Z3_USE_ENDSTOP is _ZMAX_."
-    #elif !HAS_Z3_MIN && !HAS_Z3_MAX
-      #error "Z3_USE_ENDSTOP has been assigned to a nonexistent endstop!"
-    #endif
-  #endif
-  #if NUM_Z_STEPPER_DRIVERS >= 4
-    #if !Z4_USE_ENDSTOP
-      #error "You must set Z4_USE_ENDSTOP with Z_MULTI_ENDSTOPS when NUM_Z_STEPPER_DRIVERS >= 4."
-    #elif Z4_USE_ENDSTOP == _XMIN_ && DISABLED(USE_XMIN_PLUG)
-      #error "USE_XMIN_PLUG is required when Z4_USE_ENDSTOP is _XMIN_."
-    #elif Z4_USE_ENDSTOP == _XMAX_ && DISABLED(USE_XMAX_PLUG)
-      #error "USE_XMAX_PLUG is required when Z4_USE_ENDSTOP is _XMAX_."
-    #elif Z4_USE_ENDSTOP == _YMIN_ && DISABLED(USE_YMIN_PLUG)
-      #error "USE_YMIN_PLUG is required when Z4_USE_ENDSTOP is _YMIN_."
-    #elif Z4_USE_ENDSTOP == _YMAX_ && DISABLED(USE_YMAX_PLUG)
-      #error "USE_YMAX_PLUG is required when Z4_USE_ENDSTOP is _YMAX_."
-    #elif Z4_USE_ENDSTOP == _ZMIN_ && DISABLED(USE_ZMIN_PLUG)
-      #error "USE_ZMIN_PLUG is required when Z4_USE_ENDSTOP is _ZMIN_."
-    #elif Z4_USE_ENDSTOP == _ZMAX_ && DISABLED(USE_ZMAX_PLUG)
-      #error "USE_ZMAX_PLUG is required when Z4_USE_ENDSTOP is _ZMAX_."
-    #elif !HAS_Z4_MIN && !HAS_Z4_MAX
-      #error "Z4_USE_ENDSTOP has been assigned to a nonexistent endstop!"
-    #endif
+  #elif !Z2_USE_ENDSTOP
+    #error "Z2_USE_ENDSTOP must be set with Z_MULTI_ENDSTOPS."
+  #elif !Z3_USE_ENDSTOP && NUM_Z_STEPPER_DRIVERS >= 3
+    #error "Z3_USE_ENDSTOP must be set with Z_MULTI_ENDSTOPS and NUM_Z_STEPPER_DRIVERS >= 3."
+  #elif !Z4_USE_ENDSTOP && NUM_Z_STEPPER_DRIVERS >= 4
+    #error "Z4_USE_ENDSTOP must be set with Z_MULTI_ENDSTOPS and NUM_Z_STEPPER_DRIVERS >= 4."
   #endif
 #endif
 

Marlin/src/pins/pins_postprocess.h

 //
 // Disable unused endstop / probe pins
 //
+#define _STOP_IN_USE(N) (X2_USE_ENDSTOP == N || Y2_USE_ENDSTOP == N || Z2_USE_ENDSTOP == N || Z3_USE_ENDSTOP == N || Z4_USE_ENDSTOP == N)
+#if _STOP_IN_USE(_XMAX_)
+  #define USE_XMAX_PLUG
+#endif
+#if _STOP_IN_USE(_YMAX_)
+  #define USE_YMAX_PLUG
+#endif
+#if _STOP_IN_USE(_ZMAX_)
+  #define USE_ZMAX_PLUG
+#endif
+#if _STOP_IN_USE(_XMIN_)
+  #define USE_XMIN_PLUG
+#endif
+#if _STOP_IN_USE(_YMIN_)
+  #define USE_YMIN_PLUG
+#endif
+#if _STOP_IN_USE(_ZMIN_)
+  #define USE_ZMIN_PLUG
+#endif
+#undef _STOP_IN_USE
 #if !HAS_CUSTOM_PROBE_PIN
   #undef Z_MIN_PROBE_PIN
   #define Z_MIN_PROBE_PIN    -1
 #endif
-
 #if DISABLED(USE_XMAX_PLUG)
   #undef X_MAX_PIN
   #define X_MAX_PIN          -1
 #endif
-
 #if DISABLED(USE_YMAX_PLUG)
   #undef Y_MAX_PIN
   #define Y_MAX_PIN          -1
 #endif
-
 #if DISABLED(USE_ZMAX_PLUG)
   #undef Z_MAX_PIN
   #define Z_MAX_PIN          -1
 #endif
-
 #if DISABLED(USE_XMIN_PLUG)
   #undef X_MIN_PIN
   #define X_MIN_PIN          -1
 #endif
-
 #if DISABLED(USE_YMIN_PLUG)
   #undef Y_MIN_PIN
   #define Y_MIN_PIN          -1
 #endif
-
 #if DISABLED(USE_ZMIN_PLUG)
   #undef Z_MIN_PIN
   #define Z_MIN_PIN          -1
 #endif
+#if DISABLED(X_DUAL_ENDSTOPS) || X_HOME_DIR > 0
+  #undef X2_MIN_PIN
+#endif
+#if DISABLED(X_DUAL_ENDSTOPS) || X_HOME_DIR < 0
+  #undef X2_MAX_PIN
+#endif
+#if DISABLED(Y_DUAL_ENDSTOPS) || Y_HOME_DIR > 0
+  #undef Y2_MIN_PIN
+#endif
+#if DISABLED(Y_DUAL_ENDSTOPS) || Y_HOME_DIR < 0
+  #undef Y2_MAX_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || Z_HOME_DIR > 0
+  #undef Z2_MIN_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || Z_HOME_DIR < 0
+  #undef Z2_MAX_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || NUM_Z_STEPPER_DRIVERS < 3 || Z_HOME_DIR > 0
+  #undef Z3_MIN_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || NUM_Z_STEPPER_DRIVERS < 3 || Z_HOME_DIR < 0
+  #undef Z3_MAX_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || NUM_Z_STEPPER_DRIVERS < 4 || Z_HOME_DIR > 0
+  #undef Z4_MIN_PIN
+#endif
+#if DISABLED(Z_MULTI_ENDSTOPS) || NUM_Z_STEPPER_DRIVERS < 4 || Z_HOME_DIR < 0
+  #undef Z4_MAX_PIN
+#endif
 
 #if HAS_FILAMENT_SENSOR
   #define FIL_RUNOUT1_PIN FIL_RUNOUT_PIN