Marlin_Firmware/Marlin/pins_RAMPS_OLD.h

/**
 * 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 with RAMPS v1.0, v1.1, v1.2 pin assignments
 */

#if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
#endif

// Uncomment the following line for RAMPS v1.0
//#define RAMPS_V_1_0

#define X_STEP_PIN         26
#define X_DIR_PIN          28
#define X_ENABLE_PIN       24
#define X_MIN_PIN           3
#define X_MAX_PIN           2

#define Y_STEP_PIN         38
#define Y_DIR_PIN          40
#define Y_ENABLE_PIN       36
#define Y_MIN_PIN          16
#define Y_MAX_PIN          17

#define Z_STEP_PIN         44
#define Z_DIR_PIN          46
#define Z_ENABLE_PIN       42
#define Z_MIN_PIN          18
#define Z_MAX_PIN          19

#define E0_STEP_PIN        32
#define E0_DIR_PIN         34
#define E0_ENABLE_PIN      30

#define SDPOWER            48
#define SDSS               53
#define LED_PIN            13

#if ENABLED(RAMPS_V_1_0) // RAMPS_V_1_0
  #define HEATER_0_PIN     12    // RAMPS 1.0
  #define HEATER_BED_PIN   -1    // RAMPS 1.0
  #define FAN_PIN          11    // RAMPS 1.0
#else // RAMPS_V_1_1 or RAMPS_V_1_2
  #define HEATER_0_PIN     10    // RAMPS 1.1
  #define HEATER_BED_PIN    8    // RAMPS 1.1
  #define FAN_PIN           9    // RAMPS 1.1
#endif

#define TEMP_0_PIN          2    // MUST USE ANALOG INPUT NUMBERING NOT DIGITAL OUTPUT NUMBERING!!!!!!!!!
#define TEMP_BED_PIN        1    // MUST USE ANALOG INPUT NUMBERING NOT DIGITAL OUTPUT NUMBERING!!!!!!!!!

// SPI for Max6675 or Max31855 Thermocouple
#if DISABLED(SDSUPPORT)
  #define MAX6675_SS       66// Do not use pin 53 if there is even the remote possibility of using Display/SD card
#else
  #define MAX6675_SS       66// Do not use pin 49 as this is tied to the switch inside the SD card socket to detect if there is an SD card present
#endif

#if DISABLED(SDSUPPORT)
  // these pins are defined in the SD library if building with SD support
  #define SCK_PIN          52
  #define MISO_PIN         50
  #define MOSI_PIN         51
#endif