HAL for DUE architecture

Marlin/pins_RAMPS4DUE.h

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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ * 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/>.
+ *
+ */
+
+/**
+ * Arduino Mega or Due with RAMPS4DUE pin assignments
+ *
+ * Applies to the following boards:
+ *
+ *  RAMPS4DUE_EFB (Hotend, Fan, Bed)
+ *  RAMPS4DUE_EEB (Hotend0, Hotend1, Bed)
+ *  RAMPS4DUE_EFF (Hotend, Fan0, Fan1)
+ *  RAMPS4DUE_EEF (Hotend0, Hotend1, Fan)
+ *  RAMPS4DUE_SF  (Spindle, Controller Fan)
+ *
+ *  Differences between
+ *  RAMPS_14 | RAMPS4DUE
+ *       A13 | A9/D63 (shares the same pin with AUX2_4PIN)
+ *       A14 | A10/D64 (shares the same pin with AUX2_5PIN)
+ *       A15 | NC
+ */
+
+#if !defined(__SAM3X8E__) && !defined(__AVR_ATmega2560__)
+  #error "Oops!  Make sure you have 'Arduino Due' or 'Arduino Mega' selected from the 'Tools -> Boards' menu."
+#endif
+
+#ifndef BOARD_NAME
+  #define BOARD_NAME       "RAMPS4DUE"
+#endif
+
+#define IS_RAMPS4DUE
+#include "pins_RAMPS.h"
+
+//
+// Temperature Sensors
+//
+#undef TEMP_0_PIN
+#define TEMP_0_PIN          9   // Analog Input
+
+#undef TEMP_1_PIN
+#define TEMP_1_PIN         -1   // Analog Input
+
+#undef TEMP_BED_PIN
+#define TEMP_BED_PIN       10   // Analog Input