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Dust
Presuming "cxandy" is the reseller or the maker I have requested source files be published somewhere...
SMART RAMPS uses the allmost same pin definitions as 1.4.
Here are the pin definitions for this board.
#if MOTHERBOARD == 408
#ifndef __SAM3X8E__
#error Oops! Make sure you have 'Arduino Due' selected from the 'Tools -> Boards' menu.
#endif
#define KNOWN_BOARD
#define CPU_ARCH ARCH_ARM
/*****************************************************************
* Arduino Due Pin Assignments
******************************************************************/
#define ORIG_X_STEP_PIN 54
#define ORIG_X_DIR_PIN 55
#define ORIG_X_MIN_PIN 3
#define ORIG_X_MAX_PIN 2
#define ORIG_X_ENABLE_PIN 38
#define ORIG_Y_STEP_PIN 60
#define ORIG_Y_DIR_PIN 61
#define ORIG_Y_MIN_PIN 14
#define ORIG_Y_MAX_PIN 15
#define ORIG_Y_ENABLE_PIN 56
#define ORIG_Z_STEP_PIN 46
#define ORIG_Z_DIR_PIN 48
#define ORIG_Z_MIN_PIN 18
#define ORIG_Z_MAX_PIN 19
#define ORIG_Z_ENABLE_PIN 62
// Note that on the Due pin A0 on the board is channel 2 on the ARM chip
#define HEATER_0_PIN 10
#define TEMP_0_PIN 11 // Due analog pin #
#define HEATER_1_PIN 8
#define TEMP_1_PIN 12 // Due analog pin #
#define HEATER_2_PIN 9
#define TEMP_2_PIN 13 // Due analog pin #
#define ORIG_E0_STEP_PIN 26
#define ORIG_E0_DIR_PIN 28
#define ORIG_E0_ENABLE_PIN 24
#define ORIG_E1_STEP_PIN 36
#define ORIG_E1_DIR_PIN 34
#define ORIG_E1_ENABLE_PIN 30
#define SDPOWER -1
#define SDSS 53 // 10 if using HW SPI. 53 if using SW SPI
#define LED_PIN 13
#define ORIG_FAN_PIN 9
#define PS_ON_PIN 12
#define KILL_PIN -1
#define SUICIDE_PIN -1 //PIN that has to be turned on right after start, to keep power flowing.