Auto-assign CS pins for X2, Y2, Z2 (#10057)

Fixes #9211

Marlin/src/pins/pins.h

   #define E4_ENABLE_PIN -1
 #endif
 
+#ifndef X_CS_PIN
+  #define X_CS_PIN -1
+#endif
+#ifndef Y_CS_PIN
+  #define Y_CS_PIN -1
+#endif
+#ifndef Z_CS_PIN
+  #define Z_CS_PIN -1
+#endif
+#ifndef E0_CS_PIN
+  #define E0_CS_PIN -1
+#endif
+#ifndef E1_CS_PIN
+  #define E1_CS_PIN -1
+#endif
+#ifndef E2_CS_PIN
+  #define E2_CS_PIN -1
+#endif
+#ifndef E3_CS_PIN
+  #define E3_CS_PIN -1
+#endif
+#ifndef E4_CS_PIN
+  #define E4_CS_PIN -1
+#endif
+
 #ifndef FAN_PIN
   #define FAN_PIN -1
 #endif
 #endif
 
 // List of pins which to ignore when asked to change by gcode, 0 and 1 are RX and TX, do not mess with those!
-#define _E0_PINS E0_STEP_PIN, E0_DIR_PIN, E0_ENABLE_PIN, E0_MS1_PIN, E0_MS2_PIN,
+#define _E0_PINS E0_STEP_PIN, E0_DIR_PIN, E0_ENABLE_PIN, E0_MS1_PIN, E0_MS2_PIN, E0_CS_PIN,
 #define _E1_PINS
 #define _E2_PINS
 #define _E3_PINS
                       // Tools 0 and 1 use E0
   #if EXTRUDERS > 2   // Tools 2 and 3 use E1
     #undef _E1_PINS
-    #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN,
+    #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN, E1_CS_PIN,
     #if EXTRUDERS > 4 // Tools 4 and 5 use E2
       #undef _E2_PINS
-      #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN,
+      #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN, E2_CS_PIN,
     #endif
   #endif
 #elif EXTRUDERS > 1
   #undef _E1_PINS
-  #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN,
+  #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN, E1_CS_PIN,
   #if EXTRUDERS > 2
     #undef _E2_PINS
-    #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN,
+    #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN, E2_CS_PIN,
     #if EXTRUDERS > 3
       #undef _E3_PINS
-      #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, E3_MS1_PIN, E3_MS2_PIN,
+      #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, E3_MS1_PIN, E3_MS2_PIN, E3_MS3_PIN, E3_CS_PIN,
       #if EXTRUDERS > 4
         #undef _E4_PINS
-        #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN, E4_MS1_PIN, E4_MS2_PIN,
+        #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN, E4_MS1_PIN, E4_MS2_PIN, E4_MS3_PIN, E4_CS_PIN,
       #endif // EXTRUDERS > 4
     #endif // EXTRUDERS > 3
   #endif // EXTRUDERS > 2
 #endif // EXTRUDERS > 1
 
-#define _H0_PINS HEATER_0_PIN, E0_AUTO_FAN_PIN, analogInputToDigitalPin(TEMP_0_PIN),
+// Marlin needs to account for pins that equal -1
+#define marlinAnalogInputToDigitalPin(p) ((p) == -1 ? -1 : analogInputToDigitalPin(p))
+
+#define _H0_PINS HEATER_0_PIN, E0_AUTO_FAN_PIN, marlinAnalogInputToDigitalPin(TEMP_0_PIN),
 #define _H1_PINS
 #define _H2_PINS
 #define _H3_PINS
 
 #if HOTENDS > 1
   #undef _H1_PINS
-  #define _H1_PINS HEATER_1_PIN, E1_AUTO_FAN_PIN, analogInputToDigitalPin(TEMP_1_PIN),
+  #define _H1_PINS HEATER_1_PIN, E1_AUTO_FAN_PIN, marlinAnalogInputToDigitalPin(TEMP_1_PIN),
   #if HOTENDS > 2
     #undef _H2_PINS
-    #define _H2_PINS HEATER_2_PIN, E2_AUTO_FAN_PIN, analogInputToDigitalPin(TEMP_2_PIN),
+    #define _H2_PINS HEATER_2_PIN, E2_AUTO_FAN_PIN, marlinAnalogInputToDigitalPin(TEMP_2_PIN),
     #if HOTENDS > 3
       #undef _H3_PINS
-      #define _H3_PINS HEATER_3_PIN, E3_AUTO_FAN_PIN, analogInputToDigitalPin(TEMP_3_PIN),
+      #define _H3_PINS HEATER_3_PIN, E3_AUTO_FAN_PIN, marlinAnalogInputToDigitalPin(TEMP_3_PIN),
       #if HOTENDS > 4
         #undef _H4_PINS
-        #define _H4_PINS HEATER_4_PIN, analogInputToDigitalPin(TEMP_4_PIN),
+        #define _H4_PINS HEATER_4_PIN, marlinAnalogInputToDigitalPin(TEMP_4_PIN),
       #endif // HOTENDS > 4
     #endif // HOTENDS > 3
   #endif // HOTENDS > 2
 #elif ENABLED(MIXING_EXTRUDER)
   #undef _E1_PINS
-  #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN,
+  #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, E1_MS1_PIN, E1_MS2_PIN, E1_CS_PIN,
   #if MIXING_STEPPERS > 2
     #undef _E2_PINS
-    #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN,
+    #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, E2_MS1_PIN, E2_MS2_PIN, E2_CS_PIN,
     #if MIXING_STEPPERS > 3
       #undef _E3_PINS
-      #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, E3_MS1_PIN, E3_MS2_PIN,
+      #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, E3_MS1_PIN, E3_MS2_PIN, E3_CS_PIN,
       #if MIXING_STEPPERS > 4
         #undef _E4_PINS
-        #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN, E4_MS1_PIN, E4_MS2_PIN,
+        #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN, E4_MS1_PIN, E4_MS2_PIN, E4_CS_PIN,
       #endif // MIXING_STEPPERS > 4
     #endif // MIXING_STEPPERS > 3
   #endif // MIXING_STEPPERS > 2
 #endif // MIXING_STEPPERS > 1
 
-#define BED_PINS HEATER_BED_PIN, analogInputToDigitalPin(TEMP_BED_PIN),
+#define BED_PINS HEATER_BED_PIN, marlinAnalogInputToDigitalPin(TEMP_BED_PIN),
 
 //
 // Assign endstop pins for boards with only 3 connectors
     #define X2_STEP_PIN   _EPIN(E_STEPPERS, STEP)
     #define X2_DIR_PIN    _EPIN(E_STEPPERS, DIR)
     #define X2_ENABLE_PIN _EPIN(E_STEPPERS, ENABLE)
+    #define X2_CS_PIN     _EPIN(E_STEPPERS, CS)
     #if E_STEPPERS > 4 || !PIN_EXISTS(X2_ENABLE)
       #error "No E stepper plug left for X2!"
     #endif
   #endif
   #undef _X2_PINS
-  #define _X2_PINS X2_STEP_PIN, X2_DIR_PIN, X2_ENABLE_PIN,
+  #define _X2_PINS X2_STEP_PIN, X2_DIR_PIN, X2_ENABLE_PIN, X2_CS_PIN,
   #define Y2_E_INDEX INCREMENT(E_STEPPERS)
 #else
   #define Y2_E_INDEX E_STEPPERS
     #define Y2_STEP_PIN   _EPIN(Y2_E_INDEX, STEP)
     #define Y2_DIR_PIN    _EPIN(Y2_E_INDEX, DIR)
     #define Y2_ENABLE_PIN _EPIN(Y2_E_INDEX, ENABLE)
+    #define Y2_CS_PIN     _EPIN(Y2_E_INDEX, CS)
     #if Y2_E_INDEX > 4 || !PIN_EXISTS(Y2_ENABLE)
       #error "No E stepper plug left for Y2!"
     #endif
   #endif
   #undef _Y2_PINS
-  #define _Y2_PINS Y2_STEP_PIN, Y2_DIR_PIN, Y2_ENABLE_PIN,
+  #define _Y2_PINS Y2_STEP_PIN, Y2_DIR_PIN, Y2_ENABLE_PIN, Y2_CS_PIN,
   #define Z2_E_INDEX INCREMENT(Y2_E_INDEX)
 #else
   #define Z2_E_INDEX Y2_E_INDEX
     #define Z2_STEP_PIN   _EPIN(Z2_E_INDEX, STEP)
     #define Z2_DIR_PIN    _EPIN(Z2_E_INDEX, DIR)
     #define Z2_ENABLE_PIN _EPIN(Z2_E_INDEX, ENABLE)
+    #define Z2_CS_PIN     _EPIN(Z2_E_INDEX, CS)
     #if Z2_E_INDEX > 4 || !PIN_EXISTS(Z2_ENABLE)
       #error "No E stepper plug left for Z2!"
     #endif
   #endif
   #undef _Z2_PINS
-  #define _Z2_PINS Z2_STEP_PIN, Z2_DIR_PIN, Z2_ENABLE_PIN,
+  #define _Z2_PINS Z2_STEP_PIN, Z2_DIR_PIN, Z2_ENABLE_PIN, Z2_CS_PIN,
 #endif
 
 #ifndef HAL_SENSITIVE_PINS
 #endif
 
 #define SENSITIVE_PINS { \
-    X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, \
-    Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, \
-    Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_MIN_PROBE_PIN, \
+    X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, X_MS1_PIN, X_MS2_PIN, X_CS_PIN, \
+    Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Y_MS1_PIN, Y_MS2_PIN, Y_CS_PIN, \
+    Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_MS1_PIN, Z_MS2_PIN, Z_MS3_PIN, Z_CS_PIN, Z_MIN_PROBE_PIN, \
     PS_ON_PIN, HEATER_BED_PIN, FAN_PIN, FAN1_PIN, FAN2_PIN, CONTROLLER_FAN_PIN, \
     _E0_PINS _E1_PINS _E2_PINS _E3_PINS _E4_PINS BED_PINS \
     _H0_PINS _H1_PINS _H2_PINS _H3_PINS _H4_PINS \
     _X2_PINS _Y2_PINS _Z2_PINS \
-    X_MS1_PIN, X_MS2_PIN, Y_MS1_PIN, Y_MS2_PIN, Z_MS1_PIN, Z_MS2_PIN, \
     HAL_SENSITIVE_PINS \
   }