Support for Gen3 Monolithic electronics

Techzone Monotronics support, ignoring the tip manager and using fan connector as on Sprinter FW
TODO: Add support for tipmanager

Marlin/Configuration.h

 // 82 = Brainwave (AT90USB646)
 // 83 = SAV Mk-I (AT90USB1286)
 // 9  = Gen3+
+// 22 = Gen3 Monolithic Electronics
 // 70 = Megatronics
 // 701= Megatronics v2.0
 // 702= Minitronics v1.0

Marlin/Makefile

 HARDWARE_VARIANT ?= Sanguino
 MCU              ?= atmega644p
 
+#Gen3 Monolithic Electronics
+else ifeq  ($(HARDWARE_MOTHERBOARD),22)
+HARDWARE_VARIANT ?= Sanguino
+MCU              ?= atmega644p
+
 #Megatronics
 else ifeq  ($(HARDWARE_MOTHERBOARD),70)
 HARDWARE_VARIANT ?= arduino

Marlin/pins.h

 
 #endif
 
+/****************************************************************************************
+* Gen3  Monolithic Electronics
+*
+****************************************************************************************/
+#if MOTHERBOARD == 22
+#define KNOWN_BOARD 1
+
+#ifndef __AVR_ATmega644P__
+    #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu.
+#endif
+
+#define DEBUG_PIN 0
+
+// x axis
+#define X_STEP_PIN 15
+#define X_DIR_PIN 18
+#define X_MIN_PIN 20
+//Alex Checar #define X_STOP_PIN         20
+#define X_ENABLE_PIN 24 //actually uses Y_enable_pin
+#define X_MAX_PIN -1
+
+// y axes
+#define Y_STEP_PIN 23
+#define Y_DIR_PIN 22
+#define Y_MIN_PIN 25
+//Alex Checar #define Y_STOP_PIN         25
+#define Y_ENABLE_PIN 24 //shared with X_enable_pin
+#define Y_MAX_PIN -1
+
+// z axes
+#define Z_STEP_PIN 27
+#define Z_DIR_PIN 28
+#define Z_MIN_PIN 30
+//Alex Checar #define Z_STOP_PIN         30
+#define Z_ENABLE_PIN 29
+#define Z_MAX_PIN -1
+
+//extruder pins
+#define E0_STEP_PIN         12
+#define E0_DIR_PIN          17
+#define E0_ENABLE_PIN       3
 
+#define HEATER_0_PIN 16
+#define TEMP_0_PIN 0
+
+#define FAN_PIN -1
+
+//bed pins
+#define HEATER_BED_PIN -1
+#define TEMP_BED_PIN -1
+
+
+#define SDSS		 -1
+#define SDPOWER          -1
+#define LED_PIN          -1
+
+//pin for controlling the PSU.
+#define PS_ON_PIN       14	//Alex, Do this work on the card?
+
+//Alex extras from Gen3+
+#define KILL_PIN           -1
+#define TEMP_1_PIN         -1
+#define TEMP_2_PIN         -1
+#define HEATER_2_PIN       -1
+
+#endif
 
 /****************************************************************************************
 * Open Motion controller with enable based extruders