SPINDLE/LASER pins changes

Marlin/pinsDebug_list.h

 #if PIN_EXISTS(SPINDLE_LASER_ENABLE)
   REPORT_NAME_DIGITAL(SPINDLE_LASER_ENABLE_PIN, __LINE__ )
 #endif
-#if PIN_EXISTS(SPINDLE_SPEED_LASER_POWER)
-  REPORT_NAME_DIGITAL(SPINDLE_SPEED_LASER_POWER_PIN, __LINE__ )
+#if PIN_EXISTS(SPINDLE_LASER_PWM)
+  REPORT_NAME_DIGITAL(SPINDLE_LASER_PWM_PIN, __LINE__ )
 #endif
 #if PIN_EXISTS(SR_CLK)
   REPORT_NAME_DIGITAL(SR_CLK_PIN, __LINE__ )

Marlin/pins_3DRAG.h

 #define RAMPS_D9_PIN 8
 #define MOSFET_D_PIN 12
 
+#define CASE_LIGHT_PIN -1     // MUST BE HARDWARE PWM but one is not available on expansion header
+
 #include "pins_RAMPS.h"
 
 //
   #define BEEPER_PIN       33
 
 #endif // ULTRA_LCD && NEWPANEL
+
+/**
+ *  M3/M4/M5 - Spindle/Laser Control
+ *
+ *  If you want to control the speed of your spindle then you'll have
+ *  have to sacrifce the Extruder and pull some signals off the Z stepper
+ *  driver socket.
+ *
+ *  The following assumes:
+ *   - the Z stepper driver socket is empty
+ *   - the extruder driver socket has a driver board plugged into it
+ *   - the Z stepper wires are attached the the extruder connector
+ *
+ *  If you want to keep the extruder AND don't have a LCD display then
+ *  you can still control the power on/off and spindle direction.
+ *
+ *  Where to get spindle signals
+ *
+ *      stepper signal           socket name       socket name
+ *                                          -------
+ *       SPINDLE_LASER_ENABLE_PIN /ENABLE  O|     |O  VMOT
+ *                                    MS1  O|     |O  GND
+ *                                    MS2  O|     |O  2B
+ *                                    MS3  O|     |O  2A
+ *                                 /RESET  O|     |O  1A
+ *                                 /SLEEP  O|     |O  1B
+ *          SPINDLE_LASER_PWM_PIN    STEP  O|     |O  VDD
+ *                SPINDLE_DIR_PIN     DIR  O|     |O  GND
+ *                                          -------
+ *
+ *  Note: Socket names vary from vendor to vendor
+ */
+#undef SPINDLE_LASER_PWM_PIN    // Definitions in pins_RAMPS.h are not good with 3DRAG
+#undef SPINDLE_LASER_ENABLE_PIN
+#undef SPINDLE_DIR_PIN
+
+#if ENABLED(SPINDLE_LASER_ENABLE)
+  #if !EXTRUDERS
+    #undef E0_DIR_PIN
+    #undef E0_ENABLE_PIN
+    #undef E0_STEP_PIN
+    #undef Z_DIR_PIN
+    #undef Z_ENABLE_PIN
+    #undef Z_STEP_PIN
+    #define Z_DIR_PIN                28
+    #define Z_ENABLE_PIN             24
+    #define Z_STEP_PIN               26
+    #define SPINDLE_LASER_PWM_PIN    46  // MUST BE HARDWARE PWM
+    #define SPINDLE_LASER_ENABLE_PIN 62  // Pin should have a pullup!
+    #define SPINDLE_DIR_PIN          48
+  #elif !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL)) // use expansion header if no LCD in use
+    #define SPINDLE_LASER_ENABLE_PIN 16  // Pin should have a pullup/pulldown!
+    #define SPINDLE_DIR_PIN          17
+  #endif
+#endif

Marlin/pins_AZTEEG_X3.h

  * 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"
 
 //
   #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

Marlin/pins_AZTEEG_X3_PRO.h

 
 #define BOARD_NAME "Azteeg X3 Pro"
 
+#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.h"
 
+#ifndef __AVR_ATmega2560__
+  #error "Oops! Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
+#endif
+
 //
 // Servos
 //
 #if ENABLED(VIKI2) || ENABLED(miniVIKI)
   #undef SD_DETECT_PIN
   #define SD_DETECT_PIN    49 // For easy adapter board
+  #undef BEEPER_PIN
+  #define  BEEPER_PIN  12     // 33 isn't physically available to the LCD display
 #else
   #define STAT_LED_RED_PIN 32
   #define STAT_LED_BLUE_PIN 35
 #endif
+
+//
+// Misc. Functions
+//
+#undef DOGLCD_A0            // steal pin 44 for the case light
+#define DOGLCD_A0      57
+#if ENABLED(OK_TO_CHANGE_CASE_LIGHT)
+  #undef CASE_LIGHT_PIN
+  #define CASE_LIGHT_PIN 44    // must have a hardware PWM
+#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)   // use EXP2 header
+  #if ENABLED(VIKI2) || ENABLED(miniVIKI)
+    #undef BTN_EN2
+    #define BTN_EN2             31  // need 7 for the spindle speed PWM
+  #endif
+  #define SPINDLE_LASER_PWM_PIN     7  // must have a hardware PWM
+  #define SPINDLE_LASER_ENABLE_PIN 20  // Pin should have a pullup!
+  #define SPINDLE_DIR_PIN          21
+#endif
+

Marlin/pins_BAM_DICE_DUE.h

 
 #define BOARD_NAME "2PrintBeta Due"
 
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 66  // Pin should have a pullup/pulldown!
+#define SPINDLE_DIR_PIN          67
+#define SPINDLE_LASER_PWM_PIN    44  // MUST BE HARDWARE PWM
+
 #include "pins_RAMPS.h"
 
 //

Marlin/pins_BQ_ZUM_MEGA_3D.h

 #define ORIG_E2_AUTO_FAN_PIN  6
 #define ORIG_E3_AUTO_FAN_PIN  6
 
+//
+// Misc. Functions
+//
+#define CASE_LIGHT_PIN   44     // MUST BE HARDWARE PWM
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 40  // Pin should have a pullup/pulldown!
+#define SPINDLE_LASER_PWM_PIN    44  // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN          42
+
 #include "pins_RAMPS_13.h"
 
 //

Marlin/pins_BRAINWAVE.h

  * https://github.com/unrepentantgeek/brainwave-arduino
  */
 
+/**
+ *  Rev B  16 JAN 2017
+ *
+ *  Added pointer to a currently available Arduino IDE extension that will
+ *  allow this board to use the latest Marlin software
+ */
+
+/**
+ *  Marlin_AT90USB - https://github.com/Bob-the-Kuhn/Marlin_AT90USB
+ *    This is the only known IDE extension that is compatible with the pin definitions
+ *    in this file, Adrduino 1.6.12 and the latest mainstream Marlin software.
+ *
+ *    "Marlin_AT90USB" makes PWM0A available rather than the usual PWM1C. These PWMs share
+ *    the same physical pin. Marlin uses TIMER1 to generate interrupts and sets it up such
+ *    that PWM1A, PWM1B & PWM1C can not be used.
+ *
+ *  Installation:
+ *
+ *    1. In the Arduino IDE, under Files -> Preferences paste the following URL
+ *       https://rawgit.com/Bob-the-Kuhn/Marlin_AT90USB/master/package_MARLIN_AT90USB_index.json
+ *    2. Under Tools -> Board -> Boards manager, scroll to the bottom, click on MARLIN_AT90USB
+ *       and then click on "Install"
+ *    3. Select "AT90USB646_STANDARD" from the 'Tools -> Boards' menu.
+ */
+
+/**
+ *  To burn the bootloader that comes with Marlin_AT90USB:
+ *
+ *    1. Connect your programmer to the board.
+ *    2. In Arduino IDE select "AT90USB646_STANDARD" and then select the programmer.
+ *    3. In Arduino IDE click on "burn bootloader". Don't worry about the "verify failed at 1F000" error message.
+ *    4. The programmer is no longer needed. Remove it.
+ */
+
 #ifndef __AVR_AT90USB646__
   #error "Oops!  Make sure you have 'Brainwave' selected from the 'Tools -> Boards' menu."
 #endif

Marlin/pins_BRAINWAVE_PRO.h

  * https://github.com/unrepentantgeek/brainwave-arduino
  */
 
+/**
+ *  Rev B  16 JAN 2017
+ *
+ *  Added pointers to currently available Arduino IDE extensions that will
+ *  allow this board to use the latest Marlin software
+ */
+
+/**
+ *  There are three Arduino IDE extensions that are compatible with this board
+ *  and with the mainstream Marlin software.  All have been used with Arduino 1.6.12
+ *
+ *  Teensyduino - http://www.pjrc.com/teensy/teensyduino.html
+ *    Select Teensy++ 2.0 in Arduino IDE from the 'Tools -> Boards' menu
+ *
+ *    Installation instructions are at the above URL.  Don't bother loading the
+ *    libraries - they are not used with the Marlin software.
+ *
+ *  Printrboard - https://github.com/scwimbush/Printrboard-HID-Arduino-IDE-Support
+ *    This is basically Teensyduino but with a bootloader that can handle image sizes
+ *    larger than 64K.
+ *
+ *    Installation:
+ *
+ *       1. Go to the above URL, click on the "Clone or Download" button and then
+ *          click on "Download ZIP" button.
+ *       2. Unzip the file, find the "printrboard" directory and then copy it to the
+ *          hardware directory in Arduino.  The Arduino hardware directory will probably
+ *			be located in a path similar to this: C:\Program Files (x86)\Arduino\hardware.
+ *       3. Restart Arduino.
+ *       4. Select "Printrboard" from the 'Tools -> Boards' menu.
+ *
+ *  Marlin_AT90USB - https://github.com/Bob-the-Kuhn/Marlin_AT90USB
+ *    Uses the bootloader from Printerboard above.
+ *
+ *    "Marlin_AT90USB" makes PWM0A available rather than the usual PWM1C. These PWMs share
+ *    the same physical pin. Marlin uses TIMER1 to generate interrupts and sets it up such
+ *    that PWM1A, PWM1B & PWM1C can not be used.
+ *
+ *    Installation:
+ *
+ *       1. In the Arduino IDE, under Files -> Preferences paste the following URL
+ *          https://rawgit.com/Bob-the-Kuhn/Marlin_AT90USB/master/package_MARLIN_AT90USB_index.json
+ *       2. Under Tools -> Board -> Boards manager, scroll to the bottom, click on MARLIN_AT90USB
+ *          and then click on "Install"
+ *       3. Select "AT90USB1286_TEENSYPP" from the 'Tools -> Boards' menu.
+ */
+
+/**
+ *  To burn the bootloader that comes with Printrboard and Marlin_AT90USB:
+ *
+ *   1. Connect your programmer to the board.
+ *   2. In the Arduino IDE select "Printrboard" or "AT90USB1286_TEENSYPP" and then select the programmer.
+ *   3. In the Arduino IDE click on "burn bootloader". Don't worry about the "verify failed at 1F000" error message.
+ *   4. The programmer is no longer needed. Remove it.
+ */
+
 #ifndef __AVR_AT90USB1286__
-  #error "Oops!  Make sure you have 'Brainwave Pro' selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have 'Teensy++ 2.0', 'AT90USB1286_TEENSYPP', or 'Printrboard' selected from the 'Tools -> Boards' menu."
 #endif
 
 #include "fastio.h"
 
 #if DISABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS) // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
-  #error "Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config"
+  #error "Uncomment '#define AT90USBxx_TEENSYPP_ASSIGNMENTS' in fastio.h for this config"
 #endif
 
 #define BOARD_NAME         "Brainwave Pro"

Marlin/pins_FELIX2.h

   #define SD_DETECT_PIN 6
 
 #endif // NEWPANEL && ULTRA_LCD
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#undef SPINDLE_LASER_PWM_PIN     // Definitions in pins_RAMPS.h are not valid with this board
+#undef SPINDLE_LASER_ENABLE_PIN
+#undef SPINDLE_DIR_PIN

Marlin/pins_GEN3_MONOLITHIC.h

  * Gen3 Monolithic Electronics pin assignments
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #ifndef __AVR_ATmega644P__
   #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 #define PS_ON_PIN          14 // Alex, does this work on the card?
 
 // Alex extras from Gen3+
+

Marlin/pins_GEN3_PLUS.h

  * Gen3+ pin assignments
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the SANGUINO board and then select the CPU.
+ *
+ */
+
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega1284P__)
   #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 //
 #define SDSS                4
 #define PS_ON_PIN          14
-

Marlin/pins_GEN6.h

  * Gen6 pin assignments
  */
 
+ /**
+ * Rev B    26 DEC 2016
+ *
+ * 1) added pointer to a current Arduino IDE extension
+ * 2) added support for M3, M4 & M5 spindle control commands
+ * 3) added case light pin definition
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #ifndef __AVR_ATmega644P__
   #ifndef __AVR_ATmega1284P__
     #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 //
 #define SDSS               17
 #define DEBUG_PIN           0
+#define CASE_LIGHT_PIN   16     // MUST BE HARDWARE PWM
 
 // RS485 pins
 #define TX_ENABLE_PIN      12
 #define RX_ENABLE_PIN      13
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN  5     // Pin should have a pullup/pulldown!
+#define SPINDLE_LASER_PWM_PIN    16     // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN           6

Marlin/pins_GEN6_DELUXE.h

  * Gen6 Deluxe pin assignments
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the SANGUINO board and then select the CPU.
+ *
+ */
+
+
 #define BOARD_NAME "Gen6 Deluxe"
 
 #include "pins_GEN6.h"

Marlin/pins_GEN7_12.h

  * Gen7 v1.1, v1.2, v1.3 pin assignments
  */
 
+ /**
+ * Rev B    26 DEC 2016
+ *
+ * 1) added pointer to a current Arduino IDE extension
+ * 2) added support for M3, M4 & M5 spindle control commands
+ * 3) added case light pin definition
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #ifndef BOARD_NAME
 //
 // Limit Switches
 //
-#define X_STOP_PIN          7
-#define Y_STOP_PIN          5
+#define X_MIN_PIN           7
+#define Y_MIN_PIN           5
 #define Z_MIN_PIN           1
 #define Z_MAX_PIN           0
+#define Y_MAX_PIN           2
+#define X_MAX_PIN           6
+
 
 //
 // Z Probe (when not Z_MIN_PIN)
 //
 #define PS_ON_PIN          15
 
+#if GEN7_VERSION < 13
+  #define CASE_LIGHT_PIN   16     // MUST BE HARDWARE PWM
+#else     // Gen7 v1.3 removed the I2C connector & signals so need to get PWM off the PC power supply header
+  #define CASE_LIGHT_PIN   15     // MUST BE HARDWARE PWM
+#endif
+
 // All these generations of Gen7 supply thermistor power
 // via PS_ON, so ignore bad thermistor readings
 #define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
 #define TX_ENABLE_PIN      12
 #define RX_ENABLE_PIN      13
 
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 10  // Pin should have a pullup/pulldown!
+#define SPINDLE_DIR_PIN          11
+#if GEN7_VERSION < 13
+  #define SPINDLE_LASER_PWM_PIN  16  // MUST BE HARDWARE PWM
+#else  // Gen7 v1.3 removed the I2C connector & signals so need to get PWM off the PC power supply header
+  #define SPINDLE_LASER_PWM_PIN  15  // MUST BE HARDWARE PWM
+#endif

Marlin/pins_GEN7_13.h

  * Gen7 v1.3 pin assignments
  */
 
+ /**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #define BOARD_NAME "Gen7 v1.3"
 
 #define GEN7_VERSION 13 // v1.3

Marlin/pins_GEN7_14.h

  * Gen7 v1.4 pin assignments
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * 1) added pointer to a current Arduino IDE extension
+ * 2) added support for M3, M4 & M5 spindle control commands
+ * 3) added case light pin definition
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define BOARD_NAME "Gen7 v1.4"
 //
 // Heaters
 //
-#define HEATER_0_PIN 4
-#define HEATER_BED_PIN 3
+#define HEATER_0_PIN        4
+#define HEATER_BED_PIN      3
 
 //
 // Misc. Functions
 //
-#define PS_ON_PIN 15
+#define PS_ON_PIN          15
+#define CASE_LIGHT_PIN     15    // MUST BE HARDWARE PWM
 
 // A pin for debugging
-#define DEBUG_PIN 0
+#define DEBUG_PIN           0
 
 // RS485 pins
-#define TX_ENABLE_PIN 12
-#define RX_ENABLE_PIN 13
+#define TX_ENABLE_PIN      12
+#define RX_ENABLE_PIN      13
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 20  // Pin should have a pullup/pulldown!
+#define SPINDLE_LASER_PWM_PIN    16  // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN          21

Marlin/pins_GEN7_CUSTOM.h

  * Please review the pins and adjust them for your needs.
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * 1) added pointer to a current Arduino IDE extension
+ * 2) added support for M3, M4 & M5 spindle control commands
+ * 3) added case light pin definition
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define BOARD_NAME      "Gen7 Custom"
 //
 #define SDSS            31  // SCL pin of I2C header || CS Pin for SD Card support
 #define PS_ON_PIN       19
+#define CASE_LIGHT_PIN  15    // MUST BE HARDWARE PWM
 
 // A pin for debugging
 #define DEBUG_PIN       -1
 // RS485 pins
 //#define TX_ENABLE_PIN   12
 //#define RX_ENABLE_PIN   13
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN  5  // Pin should have a pullup/pulldown!
+#define SPINDLE_LASER_PWM_PIN    16  // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN           6

Marlin/pins_K8400.h

 #undef PS_ON_PIN
 #undef KILL_PIN
 #undef SD_DETECT_PIN
+
+#if Z_STEP_PIN == 26
+  #undef Z_STEP_PIN
+  #define Z_STEP_PIN 32
+#endif

Marlin/pins_MEGACONTROLLER.h

 //
 #define SDSS               53
 #define LED_PIN            13
+#define CASE_LIGHT_PIN      2
 
 //
 // LCD / Controller
 
   #define SD_DETECT_PIN    49
 #endif // MINIPANEL
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN     6  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN  7  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN           8

Marlin/pins_MEGATRONICS.h

 #define SDSS               53
 #define LED_PIN            13
 #define PS_ON_PIN          12
+#define CASE_LIGHT_PIN      2
 
 //
 // LCD / Controller
   #define SD_DETECT_PIN   -1   // RAMPS doesn't use this
 
 #endif // ULTRA_LCD && NEWPANEL
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN     3  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN  4  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          11

Marlin/pins_MEGATRONICS_2.h

 #define E1_DIR_PIN         39
 #define E1_ENABLE_PIN      28
 
-#define E2_STEP_PIN        23
-#define E2_DIR_PIN         24
+#define E2_STEP_PIN        23 // ? schematic says 24
+#define E2_DIR_PIN         24 // ? schematic says 23
 #define E2_ENABLE_PIN      22
 
 //
 #define SDSS               53
 #define LED_PIN            13
 #define PS_ON_PIN          12
+#define CASE_LIGHT_PIN      2
 
 //
 // LCD / Controller
 #define BTN_EN1            61
 #define BTN_EN2            59
 #define BTN_ENC            43
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN          3  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN      16  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN               11

Marlin/pins_MEGATRONICS_3.h

   #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
+#define MEGATRONICS_31
+
 #if ENABLED(MEGATRONICS_31)
   #define BOARD_NAME       "Megatronics v3.1"
 #else
 #define SDSS               53
 #define LED_PIN            13
 #define PS_ON_PIN          12
+#define CASE_LIGHT_PIN     45 // try the keypad connector
 
 //
 // LCD / Controller
   #endif
 
 #endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if DISABLED(REPRAPWORLD_KEYPAD)     // try to use the keypad connector first
+  #define SPINDLE_LASER_PWM_PIN         44  // MUST BE HARDWARE PWM
+  #define SPINDLE_LASER_ENABLE_PIN      43  // Pin should have a pullup!
+  #define SPINDLE_DIR_PIN               42
+#elif EXTRUDERS <= 2
+  // try to hijack the last extruder so that we can get the PWM signal off the Y breakout
+  // move all the Y signals to the E2 extruder socket - makes dual Y steppers harder
+  #undef Y_ENABLE_PIN
+  #undef Y_STEP_PIN
+  #undef Y_DIR_PIN
+  #undef E2_STEP_PIN
+  #undef E2_ENABLE_PIN
+  #undef E2_DIR_PIN
+  #define Y_ENABLE_PIN          23
+  #define Y_STEP_PIN            22
+  #define Y_DIR_PIN             60
+  #define SPINDLE_LASER_PWM_PIN          4  // MUST BE HARDWARE PWM
+  #define SPINDLE_LASER_ENABLE_PIN      17  // Pin should have a pullup!
+  #define SPINDLE_DIR_PIN                5
+#endif

Marlin/pins_MIGHTYBOARD_REVE.h

  *
  */
 
+/**
+ * Rev B  2 JAN 2017
+ *
+ *  Added pin definitions for:
+ *    M3, M4 & M5 spindle control commands
+ *    case light
+ *
+ *  Corrected pin assignment for MOSFET_B_PIN pin. Changed it from 9 to 11.  The port
+ *  number (B5) agrees with the schematic but B5 is assigned to logical pin 11.
+ */
+
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
   #error "Oops! Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 // With no heated bed, an additional 24V fan is possible.
 //
 #define MOSFET_A_PIN     6 // H3
-#define MOSFET_B_PIN    11 // B5
+#define MOSFET_B_PIN    11 // B5 - Rev A of this file had this pin assigned to 9
 #define MOSFET_C_PIN    45 // L4
 #define MOSFET_D_PIN    44 // L5
 
 #define LED_PIN             13 // B7
 #define CUTOFF_RESET_PIN    16 // H1
 #define CUTOFF_TEST_PIN     17 // H0
+#define CASE_LIGHT_PIN      44 // L5   MUST BE HARDWARE PWM
 
 //
 // LCD / Controller
 //
-
 #ifdef REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
 
   #define LCD_PINS_RS           33 // C4, LCD-STROBE
 
 #endif
 
-
 //
 // SD Card
 //
 
 #define MAX_PIN             THERMO_SCK_PIN
 
-//check if all pins are defined in mega/pins_arduino.h
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 66  // K4   Pin should have a pullup!
+#define SPINDLE_LASER_PWM_PIN     8  // H5   MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN          67  // K5
+
+
+
+
+
+
+
+// Check if all pins are defined in mega/pins_arduino.h
 #include <Arduino.h>
 static_assert(NUM_DIGITAL_PINS > MAX_PIN, "add missing pins to [arduino dir]/hardware/arduino/avr/variants/mega/pins_arduino.h based on fastio.h"
                                           "to digital_pin_to_port_PGM, digital_pin_to_bit_mask_PGM, digital_pin_to_timer_PGM, NUM_DIGITAL_PINS, see below");

Marlin/pins_MINIRAMBO.h

 //
 #define SDSS               53
 #define LED_PIN            13
+#define CASE_LIGHT_PIN      9
 
 //
 // LCD / Controller
 
   #endif // NEWPANEL
 #endif // ULTRA_LCD
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+
+// use P1 connector for spindle pins
+#define SPINDLE_LASER_PWM_PIN     9  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 18  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          19

Marlin/pins_MINITRONICS.h

  * Minitronics v1.0/1.1 pin assignments
  */
 
+/**
+ * Rev B   2 JAN 2017
+ *
+ *  Added pin definitions for M3, M4 & M5 spindle control commands
+ *
+ */
+
 #ifndef __AVR_ATmega1281__
   #error "Oops!  Make sure you have 'Minitronics' selected from the 'Tools -> Boards' menu."
 #endif
 
   #define SD_DETECT_PIN    -1 // Minitronics doesn't use this
 #endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE)  // assumes we're only doing CNC work (no 3D printing)
+  #undef HEATER_BED_PIN
+  #undef TEMP_BED_PIN           // need to free up some pins but also need to
+  #undef TEMP_0_PIN             // re-assign them (to unused pins) because Marlin
+  #undef TEMP_1_PIN             // requires the presence of certain pins or else it
+  #define HEATER_BED_PIN      4  // won't compile
+  #define TEMP_BED_PIN       50
+  #define TEMP_0_PIN         51
+  #define SPINDLE_LASER_ENABLE_PIN      52 // using A6 because it already has a pull up on it
+  #define SPINDLE_LASER_PWM_PIN          3 // WARNING - LED & resistor pull up to +12/+24V stepper voltage
+  #define SPINDLE_DIR_PIN               53
+#endif

Marlin/pins_MKS_BASE.h

 
 /**
  * MKS BASE 1.0 – Arduino Mega2560 with RAMPS v1.4 pin assignments
+ *
+ * Rev B - Override pin definitions for CASE_LIGHT and M3/M4/M5 spindle control
  */
 
 #if HOTENDS > 2 || E_STEPPERS > 2
 // Power outputs EFBF or EFBE
 #define MOSFET_D_PIN 7
 
-#include "pins_RAMPS.h"
+#define CASE_LIGHT_PIN            2
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN     2  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 15  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          19
+
+#include "pins_RAMPS.h"

Marlin/pins_OMCA.h

  * REF http://sanguino.cc/hardware
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__)
   #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu. (Final OMCA board)"
 #endif

Marlin/pins_OMCA_A.h

  *
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #ifndef __AVR_ATmega644__
-  #error "Oops!  Make sure you have 'SanguinoA' selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define BOARD_NAME         "Alpha OMCA"

Marlin/pins_RAMBO.h

 #define LED_PIN            13
 #define FILWIDTH_PIN        3   // Analog Input
 #define PS_ON_PIN           4
+#define CASE_LIGHT_PIN     46
 
 //
 // LCD / Controller
   #endif // !NEWPANEL
 
 #endif // ULTRA_LCD
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN    45  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 31  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          32

Marlin/pins_RAMPS.h

 
 #define PS_ON_PIN          12
 
+#if !PIN_EXISTS(CASE_LIGHT) && !defined(SPINDLE_LASER_ENABLE_PIN)
+  #undef CASE_LIGHT_PIN
+  #if !defined(NUM_SERVOS) || NUM_SERVOS == 0 // try to use servo connector first
+    #define CASE_LIGHT_PIN   6      // MUST BE HARDWARE PWM
+  #elif !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL) \
+      && (ENABLED(PANEL_ONE) || ENABLED(VIKI2) || ENABLED(miniVIKI) || ENABLED(MINIPANEL) || ENABLED(REPRAPWORLD_KEYPAD)))  // try to use AUX 2
+    #define CASE_LIGHT_PIN   44     // MUST BE HARDWARE PWM
+  #endif
+#endif
+
 //
 // LCD / Controller
 //
   #endif // NEWPANEL
 
 #endif // ULTRA_LCD
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE) && !PIN_EXISTS(SPINDLE_LASER_ENABLE_PIN)
+  #if !defined(NUM_SERVOS) || NUM_SERVOS == 0 // try to use servo connector first
+    #define SPINDLE_LASER_ENABLE_PIN  4  // Pin should have a pullup/pulldown!
+    #define SPINDLE_LASER_PWM_PIN     6  // MUST BE HARDWARE PWM
+    #define SPINDLE_DIR_PIN           5
+  #elif !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL) \
+      && (ENABLED(PANEL_ONE) || ENABLED(VIKI2) || ENABLED(miniVIKI) || ENABLED(MINIPANEL) || ENABLED(REPRAPWORLD_KEYPAD)))  // try to use AUX 2
+    #define SPINDLE_LASER_ENABLE_PIN 40  // Pin should have a pullup/pulldown!
+    #define SPINDLE_LASER_PWM_PIN    44  // MUST BE HARDWARE PWM
+    #define SPINDLE_DIR_PIN          65
+  #endif
+#endif

Marlin/pins_RAMPS_OLD.h

 #define SDPOWER            48
 #define SDSS               53
 #define LED_PIN            13
+#define CASE_LIGHT_PIN     45     // MUST BE HARDWARE PWM
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN 41  // Pin should have a pullup/pulldown!
+#define SPINDLE_LASER_PWM_PIN    45  // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN          43

Marlin/pins_RIGIDBOARD.h

 //
 // Heaters / Fans
 //
-#undef  HEATER_BED_PIN
+#undef HEATER_BED_PIN
 #define HEATER_BED_PIN     10
 
-#undef  FAN_PIN
+#undef FAN_PIN
 #define FAN_PIN             8 // Same as RAMPS_13_EEF
 
 //
 // Misc. Functions
 //
-#undef  PS_ON_PIN
+#undef PS_ON_PIN
 #define PS_ON_PIN          -1
 
 //
   #define BTN_RT           32
 
   // 'R' button
-  #undef  BTN_ENC
+  #undef BTN_ENC
   #define BTN_ENC 31
 
   // Disable encoder
-  #undef  BTN_EN1
+  #undef BTN_EN1
   #define BTN_EN1 -1
-  #undef  BTN_EN2
+  #undef BTN_EN2
   #define BTN_EN2 -1
 
-  #undef  SD_DETECT_PIN
+  #undef SD_DETECT_PIN
   #define SD_DETECT_PIN 22
 
 #elif ENABLED(REPRAP_DISCOUNT_SMART_CONTROLLER)
 
-  #undef  SD_DETECT_PIN
+  #undef SD_DETECT_PIN
   #define SD_DETECT_PIN 22
 
-  #undef  KILL_PIN
+  #undef KILL_PIN
   #define KILL_PIN 32
 
 #endif

Marlin/pins_RUMBA.h

 #endif
 
 #if TEMP_SENSOR_2 == -1
-  #define TEMP_2_PIN        7   // Analog Input (connector *K3* on RUMBA thermocouple ADD ON is used <-- this can't be used when TEMP_SENSOR_BED is defined as thermocouple)
+  #define TEMP_2_PIN        7   // Analog Input (connector *K3* on RUMBA thermocouple ADD ON is used <-- this can not be used when TEMP_SENSOR_BED is defined as thermocouple)
 #else
   #define TEMP_2_PIN       13   // Analog Input (default connector for thermistor *T2* on rumba board is used)
 #endif
 //#define TEMP_X_PIN         12   // Analog Input (default connector for thermistor *T3* on rumba board is used)
 
 #if TEMP_SENSOR_BED == -1
-  #define TEMP_BED_PIN      7   // Analog Input (connector *K3* on RUMBA thermocouple ADD ON is used <-- this can't be used when TEMP_SENSOR_2 is defined as thermocouple)
+  #define TEMP_BED_PIN      7   // Analog Input (connector *K3* on RUMBA thermocouple ADD ON is used <-- this can not be used when TEMP_SENSOR_2 is defined as thermocouple)
 #else
   #define TEMP_BED_PIN     11   // Analog Input (default connector for thermistor *THB* on rumba board is used)
 #endif
 #define LED_PIN            13
 #define PS_ON_PIN          45
 #define KILL_PIN           46
+#define CASE_LIGHT_PIN     45
 
 //
 // LCD / Controller
 #define BTN_EN1            11
 #define BTN_EN2            12
 #define BTN_ENC            43
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN     4  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 14  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          15

Marlin/pins_SANGUINOLOLU_11.h

  * Sanguinololu board pin assignments
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * 1) added pointer to a current Arduino IDE extension
+ * 2) added support for M3, M4 & M5 spindle control commands
+ * 3) added case light pin definition
+ *
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega1284P__)
   #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 //
 // Misc. Functions
 //
+
 /**
- * On some broken versions of the Sanguino libraries the pin definitions are wrong,
- * which then needs SDSS as pin 24. But you should upgrade your Sanguino libraries! See #368.
+ * In some versions of the Sanguino libraries the pin
+ * definitions are wrong, with SDSS = 24 and LED_PIN = 28 (Melzi).
+ * If you encounter issues with these pins, upgrade your
+ * Sanguino libraries! See #368.
  */
 //#define SDSS               24
 #define SDSS               31
 
 #if IS_MELZI
-  #define LED_PIN          27 // On some broken versions of the Sanguino libraries the pin definitions are wrong, so LED_PIN needs to be 28. But you should upgrade your Sanguino libraries! See #368.
+  #define LED_PIN           27
 #elif MB(STB_11)
   #define LCD_BACKLIGHT_PIN 17 // LCD backlight LED
 #endif
 
+#if DISABLED(SPINDLE_LASER_ENABLE) && ENABLED(SANGUINOLOLU_V_1_2) && !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL))  // try to use IO Header
+  #define CASE_LIGHT_PIN         4   // MUST BE HARDWARE PWM  - see if IO Header is available
+#endif
+
 //
 // LCD / Controller
 //
     #else
       #define BTN_ENC           30
     #endif
-  #elif ENABLED(OLED_PANEL_TINYBOY2)
-    #define BTN_ENC             28
-    #define LCD_SDSS            -1
-  #else  // !Panelolu2, !TinyBoy2
+  #else  // !Panelolu2
     #define BTN_ENC             16
     #define LCD_SDSS            28 // Smart Controller SD card reader rather than the Melzi
-  #endif // !Panelolu2, !TinyBoy2
+  #endif // !Panelolu2
 
   #define SD_DETECT_PIN         -1
 
 #endif // ULTRA_LCD && NEWPANEL
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE)
+  #if !MB(AZTEEG_X1) && ENABLED(SANGUINOLOLU_V_1_2) && !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL))  // try to use IO Header
+
+    #define SPINDLE_LASER_ENABLE_PIN 10  // Pin should have a pullup/pulldown!
+    #define SPINDLE_LASER_PWM_PIN     4  // MUST BE HARDWARE PWM
+    #define SPINDLE_DIR_PIN          11
+
+  #elif !MB(MELZI)  // use X stepper motor socket
+
+    /**
+     *  To control the spindle speed and have an LCD you must sacrifice
+     *  the Extruder and pull some signals off the X stepper driver socket.
+     *
+     *  The following assumes:
+     *   - The X stepper driver socket is empty
+     *   - The extruder driver socket has a driver board plugged into it
+     *   - The X stepper wires are attached the the extruder connector
+     */
+
+    /**
+     *  Where to get the spindle signals
+     *
+     *      spindle signal          socket name       socket name
+     *                                         -------
+     *                               /ENABLE  O|     |O  VMOT
+     *                                   MS1  O|     |O  GND
+     *                                   MS2  O|     |O  2B
+     *                                   MS3  O|     |O  2A
+     *                                /RESET  O|     |O  1A
+     *                                /SLEEP  O|     |O  1B
+     *  SPINDLE_LASER_PWM_PIN  STEP  O|     |O  VDD
+     *  SPINDLE_LASER_ENABLE_PIN         DIR  O|     |O  GND
+     *                                         -------
+     *
+     *  Note: Socket names vary from vendor to vendor.
+     */
+    #undef X_DIR_PIN
+    #undef X_ENABLE_PIN
+    #undef X_STEP_PIN
+    #define X_DIR_PIN                 0
+    #define X_ENABLE_PIN             14
+    #define X_STEP_PIN                1
+    #define SPINDLE_LASER_PWM_PIN    15  // MUST BE HARDWARE PWM
+    #define SPINDLE_LASER_ENABLE_PIN 21  // Pin should have a pullup!
+    #define SPINDLE_DIR_PIN          -1  // No pin available on the socket for the direction pin
+  #endif
+#endif // SPINDLE_LASER_ENABLE

Marlin/pins_SAV_MKI.h

 #define EXT_AUX_A4                 4 // Analog
 #define EXT_AUX_A4_IO             44 // Digital IO, 42 (teensy), 44 (marlin)
 
-
 //
 // LCD / Controller
 //
 #endif // SAV_3DLCD
 
 #if ENABLED(SAV_3DLCD) || ENABLED(SAV_3DGLCD)
+
   #define BTN_EN1            EXT_AUX_A1_IO
   #define BTN_EN2            EXT_AUX_A0_IO
   #define BTN_ENC            EXT_AUX_PWM_D24
 
   #define KILL_PIN           EXT_AUX_A2_IO
   #define HOME_PIN           EXT_AUX_A4_IO
-#endif // SAV_3DLCD || SAV_3DGLCD
+
+#else // Try to use the expansion header for spindle control
+
+  //
+  // M3/M4/M5 - Spindle/Laser Control
+  //
+  #define SPINDLE_LASER_PWM_PIN    24  // 12 AT90USB… pin #
+  #define SPINDLE_LASER_ENABLE_PIN 39  // Pin should have a pullup!   41 AT90USB… pin #
+  #define SPINDLE_DIR_PIN          40  // 42 AT90USB… pin #
+
+  #define CASE_LIGHT_PIN            0  // 24 AT90USB… pin #
+
+#endif

Marlin/pins_SETHI.h

  * Sethi 3D_1 pin assignments - www.sethi3d.com.br
  */
 
+/**
+ * Rev B    26 DEC 2016
+ *
+ * added pointer to a current Arduino IDE extension
+ *    this assumes that this board uses the Sanguino pin map
+ */
+
+/**
+ * A useable Arduino IDE extension (board manager) can be found at
+ * https://github.com/Lauszus/Sanguino
+ *
+ * This extension has been tested on Arduino 1.6.12 & 1.8.0
+ *
+ * Here's the JSON path:
+ * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
+ *
+ * When installing select 1.0.2
+ *
+ * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino
+ * Just use the above JSON URL instead of Sparkfun's JSON.
+ *
+ * Once installed select the Sanguino board and then select the CPU.
+ *
+ */
+
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
   #error "Oops!  Make sure you have 'Sethi 3D' selected from the 'Tools -> Boards' menu."
 #endif

Marlin/pins_TEENSY2.h

 #define SDSS               20 // 8
 #define LED_PIN             6
 #define PS_ON_PIN          27
+#define CASE_LIGHT_PIN      1 // MUST BE HARDWARE PWM
 
 //
 // LCD / Controller
   #define BTN_EN2            39
   #define BTN_ENC            40
 #endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_ENABLE_PIN  5 // Pin should have a pullup!
+#define SPINDLE_LASER_PWM_PIN     0 // MUST BE HARDWARE PWM
+#define SPINDLE_DIR_PIN           7

Marlin/pins_TEENSYLU.h

  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.   See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.   If not, see <http://www.gnu.org/licenses/>.
  *
  */
 
 /**
- * Teensylu 0.7 pin assignments (AT90USB1286)
- * Requires the Teensyduino software with Teensy++ 2.0 selected in Arduino IDE!
- * http://www.pjrc.com/teensy/teensyduino.html
- * See http://reprap.org/wiki/Printrboard for more info
+ *  rev B    30 DEC 2016
+ *
+ *  The original version of this file did NOT result in a useful program because:
+ *   1. The pin numbers assumed that the "#define AT90USBxx_TEENSYPP_ASSIGNMENTS" line
+ *      in FASTIO.h was commented out. There wasn't an Arduino IDE 1.6.x extension/package
+ *      that supported this pin map so the latest Marlin wouldn't compile.
+ *   2. The silkscreen for the four end stops don't agree with the schematic. Activating
+ *      the X endstop would tell the software that the Y endstop just went active.
+ *   3. The thermistor inputs also had heater names assigned to them. The result was
+ *      thermistor inputs that were set to digital outputs.
+ *
+ *  Rev B corrects the above problems by:
+ *   1. The "Marlin_AT90USB" extension/package was developed.  This extension enables the
+ *      latest Marlin software to compile using Arduino IDE 1.6.x and 1.80.
+ *   2. The endstop pin numbers in this file were changed to match the silkscreen.  This
+ *      makes it a little confusing when trying to correlate the schematic with the pin
+ *      numbers used in this file.
+ *   3. The offending heater names were deleted.
+ *
+ *  To create a useable image for Teensylu do the following:
+ *   a) Install the Marlin_AT90USB extension with either of the following methods:
+ *        Automatic - paste this URL into preferences and then use Boards manager
+ *            https://rawgit.com/Bob-the-Kuhn/Marlin_AT90USB/master/package_MARLIN_AT90USB_index.json
+ *        Manual:
+ *           1. Copy the following URL into Go to "https://github.com/Bob-the-Kuhn/Marlin_AT90USB",
+ *              click on the "Clone or Download" button and then click on "Download ZIP" button.
+ *           2. Unzip the file, find the "Marlin_AT90USB" directory and then copy it to the
+ *              hardware directory in Arduino.  The Arduino hardware directory will probably be
+ *              located in a path similar to this: C:\Program Files (x86)\Arduino\hardware
+ *   b) Connect the USBtinyISP to the board.
+ *   c) In the Arduino IDE select the "AT90USB1286_STANDARD" board in the of the "Marlin_AT90USB"
+ *      section and select the "USBtinyISP" programmer.
+ *   d) In the Arduino IDE click on "burn bootloader".  Don't worry about the "verify
+ *      failed at 1F000" error message.
+ *   e) The USBtinyISP programmer is no longer needed.  Remove it.
+ *   f) In FASTIO.h comment out the "#define AT90USBxx_TEENSYPP_ASSIGNMENTS" line.
+ *   g) To upload a sketch do the following:
+ *       1. remove the jumper
+ *       2. press reset
+ *       3. click on the "upload" button in the Arduino IDE
+ *       4. wait until the upload finishes (less than a minute)
+ *       5. put the jumper back on
+ *       6. press the reset button
+ *
+ *
+ *  NOTE - the "Marlin_AT90USB" pin maps make PWM0A available rather than the usual PWM1C.
+ *         These PWMs share the same physical pin. Marlin uses TIMER1 to generate
+ *         interrupts and sets it up such that PWM1A, PWM1B & PWM1C can not be used.
  */
 
-#ifndef __AVR_AT90USB1286__
-  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
+ /**
+  *  SILKSCREEN ERROR
+  *
+  *  The silkscreen for the endstops do NOT match the schematic.  The silkscreen SHOULD
+  *  read (from left to right) X-STOP, Y-STOP, Z-STOP & E-STOP.  The silkscreen actually
+  *  reads                     E-STOP, X-STOP, Y-STOP & Z-STOP.
+  *
+  *  The pin assignments in this file match the silkscreen.
+  */
+
+
+#if !defined(__AVR_AT90USB1286__) && !defined(__AVR_AT90USB1286P__)
+  #error "Oops!  Make sure you have 'AT90USB1286_STANDARD' selected from the 'Tools -> Boards' menu."
 #endif
 
-#if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
-  #error "These Teensylu assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h"
+#if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)
+  #error "please disable (comment out) the AT90USBxx_TEENSYPP_ASSIGNMENTS flag in FASTIO.h "
 #endif
 
 #define BOARD_NAME         "Teensylu"
 #define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
+
+//
+// Limit Switche definitions that match the SCHEMATIC
+//
+//#define X_STOP_PIN              13
+//#define Y_STOP_PIN              14
+//#define Z_STOP_PIN              15
+//#define E_STOP_PIN              36
+
+
 //
-// Limit Switches
+// Limit Switch definitions that match the SILKSCREEN
 //
-#define X_STOP_PIN         13
-#define Y_STOP_PIN         14
-#define Z_STOP_PIN         15
+#define X_STOP_PIN              14
+#define Y_STOP_PIN              15
+#define Z_STOP_PIN              36
+//#define E_STOP_PIN              13
 
 //
 // Steppers
 //
-#define X_STEP_PIN          0
-#define X_DIR_PIN           1
-#define X_ENABLE_PIN       39
+#define X_STEP_PIN               0
+#define X_DIR_PIN                1
+#define X_ENABLE_PIN            39
 
-#define Y_STEP_PIN          2
-#define Y_DIR_PIN           3
-#define Y_ENABLE_PIN       38
+#define Y_STEP_PIN               2
+#define Y_DIR_PIN                3
+#define Y_ENABLE_PIN            38
 
-#define Z_STEP_PIN          4
-#define Z_DIR_PIN           5
-#define Z_ENABLE_PIN       23
+#define Z_STEP_PIN               4
+#define Z_DIR_PIN                5
+#define Z_ENABLE_PIN            23
+
+#define E0_STEP_PIN              6
+#define E0_DIR_PIN               7
+#define E0_ENABLE_PIN           19
 
-#define E0_STEP_PIN         6
-#define E0_DIR_PIN          7
-#define E0_ENABLE_PIN      19
 
-//
 // Temperature Sensors
-//
-#define TEMP_0_PIN          7   // Analog Input (Extruder)
-#define TEMP_BED_PIN        6   // Analog Input (Bed)
+
+#define TEMP_0_PIN               7  // Analog Input (Extruder)
+#define TEMP_BED_PIN             6  // Analog Input (Bed)
 
 //
 // Heaters / Fans
 //
-#define HEATER_0_PIN       21  // Extruder
-#define HEATER_1_PIN       46
-#define HEATER_2_PIN       47
-#define HEATER_BED_PIN     20
-
-// If soft or fast PWM is off then use Teensyduino pin numbering, Marlin
-// fastio pin numbering otherwise
-#if ENABLED(FAN_SOFT_PWM) || ENABLED(FAST_PWM_FAN)
-  #define FAN_PIN          22
-#else
-  #define FAN_PIN          16
-#endif
+#define HEATER_0_PIN            21  // Extruder
+#define HEATER_BED_PIN          20
+
+#define FAN_PIN                 22
 
 //
 // Misc. Functions
 //
-#define SDSS                8
+#define SDSS                     8
+#define CASE_LIGHT_PIN          24
 
 //
 // LCD / Controller
 //
 #if ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL)
 
-  #define BEEPER_PIN       -1
+  #define BEEPER_PIN            -1
 
   #if ENABLED(LCD_I2C_PANELOLU2)
-    #define BTN_EN1        27  // RX1 - fastio.h pin mapping 27
-    #define BTN_EN2        26  // TX1 - fastio.h pin mapping 26
-    #define BTN_ENC        43  // A3  - fastio.h pin mapping 43
-    #define SDSS           40  // use SD card on Panelolu2 (Teensyduino pin mapping)
+    #define BTN_EN1             27
+    #define BTN_EN2             26
+    #define BTN_ENC             43
+    #define SDSS                40  // use SD card on Panelolu2
   #endif // LCD_I2C_PANELOLU2
 
-  #define SD_DETECT_PIN    -1
+  #define SD_DETECT_PIN         -1
 
 #endif // ULTRA_LCD && NEWPANEL
 
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN    12  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 41  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          42

Marlin/pins_ULTIMAIN_2.h

  * Ultiboard v2.0 pin assignments
  */
 
+/**
+ * Rev B   2 JAN 2017
+ *
+ *  Added pin definitions for:
+ *    M3, M4 & M5 spindle control commands
+ *    case light
+ */
+
 #ifndef __AVR_ATmega2560__
   #error "Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 #define BTN_EN1            40
 #define BTN_EN2            41
 #define BTN_ENC            19
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE)   // use the LED_PIN for spindle speed control or case light
+  #undef LED_PIN
+  #define SPINDLE_DIR_PIN          16
+  #define SPINDLE_LASER_ENABLE_PIN 17  // Pin should have a pullup!
+  #define SPINDLE_LASER_PWM_PIN     8  // MUST BE HARDWARE PWM
+#else
+  #undef LED_PIN
+  #define CASE_LIGHT_PIN            8
+#endif

Marlin/pins_ULTIMAKER.h

  * Ultimaker pin assignments
  */
 
+/**
+ * Rev B   2 JAN 2017
+ *
+ *  Added pin definitions for:
+ *    M3, M4 & M5 spindle control commands
+ *    case light
+ */
+
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
   #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 #define LED_PIN            13
 #define PS_ON_PIN          12
 #define SUICIDE_PIN        54  // PIN that has to be turned on right after start, to keep power flowing.
+#define CASE_LIGHT_PIN      8
 
 //
 // LCD / Controller
   #endif // !NEWPANEL
 
 #endif // ULTRA_LCD
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#define SPINDLE_LASER_PWM_PIN     9  // MUST BE HARDWARE PWM
+#define SPINDLE_LASER_ENABLE_PIN 10  // Pin should have a pullup!
+#define SPINDLE_DIR_PIN          11  // use the EXP3 PWM header

Marlin/pins_ULTIMAKER_OLD.h

  * Ultimaker pin assignments (Old electronics)
  */
 
+ /**
+ * Rev B   3 JAN 2017
+ *
+ * Details on pin definitions for M3, M4 & M5 spindle control commands and for
+ * the CASE_LIGHT_PIN are at the end of this file.
+ *
+ * This started out as an attempt to add pin definitions for M3, M4 & M5 spindle
+ * control commands but quickly turned into a head scratcher as the sources for
+ * the revisions provided inconsistent information.
+ *
+ * As best I can determine:
+ *   1.5.3 boards should use the pins_ULTIMAKER.h file which means the BOARD_NAME
+ *      define in this file should say 1.5.3 rather than 1.5.4
+ *   This file is meant for 1.1 - 1.3 boards.
+ *   The endstops for the 1.0 boards use different definitions than on the 1.1 - 1.3
+ *      boards.
+ *
+ * I've added sections that have the 1.0 and 1.5.3 + endstop definitions so you can
+ * easily switch if needed.  I've also copied over the 1.5.3 + LCD definitions.
+ *
+ * To be 100% sure of the board you have:
+ *   1. In Configuration_adv.h enable "PINS_DEBUGGING"
+ *   2. Compile & uploade
+ *   3. Enter the command "M43 W1 I1".  This command will report that pin nmumber and
+ *      name of any pin that changes state.
+ *   4. Using a 1k (approximately) resistor pull the endstops and some of the LCD pins
+ *      to ground and see what is reported.
+ *   5. If the reported pin doesn't match the file then try a different board revision
+ *      and repeat steps 2 - 5
+ */
+
+#define board_rev_1_1_TO_1_3
+//#define board_rev_1_0
+//#define board_rev_1_5
+
+
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
   #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 //
 // Limit Switches
 //
-#define X_MIN_PIN          15
-#define X_MAX_PIN          14
-#define Y_MIN_PIN          17
-#define Y_MAX_PIN          16
-#define Z_MIN_PIN          19
-#define Z_MAX_PIN          18
+#if ENABLED(board_rev_1_1_TO_1_3)
+  #define X_MIN_PIN          15  // SW1
+  #define X_MAX_PIN          14  // SW2
+  #define Y_MIN_PIN          17  // SW3
+  #define Y_MAX_PIN          16  // SW4
+  #define Z_MIN_PIN          19  // SW5
+  #define Z_MAX_PIN          18  // SW6
+#endif
+
+#if ENABLED(board_rev_1_0)
+  #define X_MIN_PIN          13  // SW1
+  #define X_MAX_PIN          12  // SW2
+  #define Y_MIN_PIN          11  // SW3
+  #define Y_MAX_PIN          10  // SW4
+  #define Z_MIN_PIN           9  // SW5
+  #define Z_MAX_PIN           8  // SW6
+#endif
+
+#if ENABLED(board_rev_1_5)
+  #define X_MIN_PIN          22
+  #define X_MAX_PIN          24
+  #define Y_MIN_PIN          26
+  #define Y_MAX_PIN          28
+  #define Z_MIN_PIN          30
+  #define Z_MAX_PIN          32
+#endif
 
 //
 // Z Probe (when not Z_MIN_PIN)
 //
 #ifndef Z_MIN_PROBE_PIN
-  #define Z_MIN_PROBE_PIN  18
+  #define Z_MIN_PROBE_PIN  Z_MAX_PIN
 #endif
 
 //
 #define E0_DIR_PIN         45
 #define E0_ENABLE_PIN      41
 
-#define E1_STEP_PIN        -1
-#define E1_DIR_PIN         -1
-#define E1_ENABLE_PIN      -1
+#define E1_STEP_PIN        -1  // 49
+#define E1_DIR_PIN         -1  // 47
+#define E1_ENABLE_PIN      -1  // 48
 
 //
 // Temperature Sensors
 // Heaters / Fans
 //
 #define HEATER_0_PIN        2
-#define HEATER_1_PIN        1
+//#define HEATER_1_PIN        3 // used for case light   Rev A said "1"
+#define HEATER_BED_PIN      4
 
 //
 // LCD / Controller
 //
-#define LCD_PINS_RS        24
-#define LCD_PINS_ENABLE    22
-#define LCD_PINS_D4        36
-#define LCD_PINS_D5        34
-#define LCD_PINS_D6        32
-#define LCD_PINS_D7        30
+#if ENABLED(board_rev_1_0) || ENABLED(board_rev_1_1_TO_1_3)
+  #define LCD_PINS_RS        24
+  #define LCD_PINS_ENABLE    22
+  #define LCD_PINS_D4        36
+  #define LCD_PINS_D5        34
+  #define LCD_PINS_D6        32
+  #define LCD_PINS_D7        30
+#elif ENABLED(board_rev_1_5) && ENABLED(ULTRA_LCD)
+
+  #define BEEPER_PIN 18
+
+  #if ENABLED(NEWPANEL)
+
+    #define LCD_PINS_RS 20
+    #define LCD_PINS_ENABLE 17
+    #define LCD_PINS_D4 16
+    #define LCD_PINS_D5 21
+    #define LCD_PINS_D6 5
+    #define LCD_PINS_D7 6
+
+    // buttons are directly attached
+    #define BTN_EN1 40
+    #define BTN_EN2 42
+    #define BTN_ENC 19
+
+    #define SD_DETECT_PIN 38
+
+  #else // !NEWPANEL - Old style panel with shift register
+
+    // buttons are attached to a shift register
+    #define SHIFT_CLK 38
+    #define SHIFT_LD 42
+    #define SHIFT_OUT 40
+    #define SHIFT_EN 17
+
+    #define LCD_PINS_RS 16
+    #define LCD_PINS_ENABLE 5
+    #define LCD_PINS_D4 6
+    #define LCD_PINS_D5 21
+    #define LCD_PINS_D6 20
+    #define LCD_PINS_D7 19
+
+    #define SD_DETECT_PIN -1
+
+  #endif // !NEWPANEL
+
+#endif // ULTRA_LCD
+
+//
+// case light  - see spindle section for more info on available hardware PWMs
+//
+#if !PIN_EXISTS(CASE_LIGHT) && ENABLED(board_rev_1_5)
+  #define CASE_LIGHT_PIN        7  // use PWM -  MUST BE HARDWARE PWM
+#endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if ENABLED(SPINDLE_LASER_ENABLE)
+
+  #if ENABLED(board_rev_1_0)       // use the last three SW positions
+
+    #undef Z_MIN_PROBE_PIN
+    #undef X_MIN_PIN              // SW1
+    #undef X_MAX_PIN              // SW2
+    #undef Y_MIN_PIN              // SW3
+    #undef Y_MAX_PIN              // SW4
+    #undef Z_MIN_PIN              // SW5
+    #undef Z_MAX_PIN              // SW6
+
+    #define X_STOP_PIN         13  // SW1  (didn't change) - also has a useable hardware PWM
+    #define Y_STOP_PIN         12  // SW2
+    #define Z_STOP_PIN         11  // SW3
+
+    #define SPINDLE_DIR_PIN          10  // SW4
+    #define SPINDLE_LASER_PWM_PIN     9  // SW5  MUST BE HARDWARE PWM
+    #define SPINDLE_LASER_ENABLE_PIN  8  // SW6  Pin should have a pullup!
+
+  #elif ENABLED(board_rev_1_5)      // use the same pins - but now they are on a different connector
+
+    #define SPINDLE_DIR_PIN          10  // EXP3-6 (silkscreen says 10)
+    #define SPINDLE_LASER_PWM_PIN     9  // EXP3-7 (silkscreen says 9) MUST BE HARDWARE PWM
+    #define SPINDLE_LASER_ENABLE_PIN  8  // EXP3-8 (silkscreen says 8) Pin should have a pullup!
+
+  #elif ENABLED(board_rev_1_1_TO_1_3)
+
+    /**
+     *  Only four hardware PWMs physically connected to anything on these boards:
+     *
+     *    HEATER_0_PIN    2  silkscreen varies - usually "PWM 1" or "HEATER1"
+     *    HEATER_1_PIN    3  silkscreen varies - usually "PWM 2" or "HEATER2"
+     *    HEATER_BED_PIN  4  silkscreen varies - usually "PWM 3" or "HEATED BED"
+     *    E0_DIR_PIN     45
+     *
+     *   If one of the heaters is used then special precautions will usually be needed.
+     *   They have an LED and resistor pullup to +24V which could damage 3.3V-5V ICs.
+     */
+    #if EXTRUDERS == 1                     // Move E0 stepper module to the spare and get signals from E0
+      #undef E0_STEP_PIN
+      #undef E0_DIR_PIN
+      #undef E0_ENABLE_PIN
+      #define E0_STEP_PIN              49
+      #define E0_DIR_PIN               47
+      #define E0_ENABLE_PIN            48
+      #define SPINDLE_DIR_PIN          43
+      #define SPINDLE_LASER_PWM_PIN    45  // MUST BE HARDWARE PWM
+      #define SPINDLE_LASER_ENABLE_PIN 41  // Pin should have a pullup!
+    #elif TEMP_SENSOR_BED == 0  // Can't use E0 so see if HEATER_BED_PIN is available
+      #undef HEATER_BED_PIN
+      #define SPINDLE_DIR_PIN          38  // Probably pin 4 on 10 pin connector closest to the E0 socket
+      #define SPINDLE_LASER_PWM_PIN     4  // MUST BE HARDWARE PWM - Special precautions usually needed.
+      #define SPINDLE_LASER_ENABLE_PIN 40  // Pin should have a pullup! (Probably pin 6 on the 10-pin
+                                           // connector closest to the E0 socket)
+    #endif
+  #endif
+#endif
+
+/**
+ *  Where to get the spindle signals on the E0 socket
+ *
+ *         spindle signal     socket name       socket name
+ *                                       -------
+ * SPINDLE_LASER_ENABLE_PIN    /ENABLE  *|     |O  VMOT
+ *                                 MS1  O|     |O  GND
+ *                                 MS2  O|     |O  2B
+ *                                 MS3  O|     |O  2A
+ *                              /RESET  O|     |O  1A
+ *                              /SLEEP  O|     |O  1B
+ *          SPINDLE_DIR_PIN       STEP  O|     |O  VDD
+ *    SPINDLE_LASER_PWM_PIN        DIR  O|     |O  GND
+ *                                       -------
+ *  * - pin closest to MS1, MS2 & MS3 jumpers on the board
+ *
+ *  Note: Socket names vary from vendor to vendor.
+ */