SPINDLE/LASER pins changes

Marlin/pins_AZTEEG_X3.h

@@ -24,12 +24,20 @@
  * AZTEEG_X3 Arduino Mega with RAMPS v1.4 pin assignments
  */
 
+#ifndef __AVR_ATmega2560__
+  #error "Oops! Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
+#endif
+
 #if HOTENDS > 2 || E_STEPPERS > 2
   #error "Azteeg X3 supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 
 #define BOARD_NAME "Azteeg X3"
 
+#if !PIN_EXISTS(CASE_LIGHT)         // doesn't already exist so OK to change the definition coming
+  #define OK_TO_CHANGE_CASE_LIGHT   // in from from the include file
+#endif
+
 #include "pins_RAMPS_13.h"
 
 //
@@ -63,3 +71,30 @@
   #define STAT_LED_BLUE_PIN 11
 
 #endif
+
+//
+// Misc
+//
+#if ENABLED(OK_TO_CHANGE_CASE_LIGHT) && STAT_LED_RED_PIN == 6
+  #undef STAT_LED_RED_PIN
+  #undef CASE_LIGHT_PIN
+  #define CASE_LIGHT_PIN 6  // open collector FET driver
+#endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#undef SPINDLE_LASER_PWM_PIN    // Definitions in pins_RAMPS.h are no good with the AzteegX3 board
+#undef SPINDLE_LASER_ENABLE_PIN
+#undef SPINDLE_DIR_PIN
+
+#if ENABLED(SPINDLE_LASER_ENABLE)
+  #undef SDA                       // use EXP3 header
+  #undef SCL
+  #if SERVO0_PIN == 7
+    #undef SERVO0_PIN
+    #def SERVO0_PIN 11
+  #define SPINDLE_LASER_PWM_PIN     7  // MUST BE HARDWARE PWM
+  #define SPINDLE_LASER_ENABLE_PIN 20  // Pin should have a pullup!
+  #define SPINDLE_DIR_PIN          21
+#endif