GRBL RAMPS 1.4 port originally by ArSi arsi@arsi.sk but enhanced to s…

…upport both Arduino Uno CPU and Arduino Mega 2560 + RAMPS 1.4 Board (including limit switches, homing and probing support)

grbl/config.h

@@ -31,14 +31,16 @@
 
 
 // Default settings. Used when resetting EEPROM. Change to desired name in defaults.h
-#define DEFAULTS_GENERIC
+//#define DEFAULTS_GENERIC
+#define DEFAULTS_PULPITROCKCNC
 
 // Serial baud rate
 #define BAUD_RATE 115200
 
 // Default cpu mappings. Grbl officially supports the Arduino Uno only. Other processor types
 // may exist from user-supplied templates or directly user-defined in cpu_map.h
-#define CPU_MAP_ATMEGA328P // Arduino Uno CPU
+//#define CPU_MAP_ATMEGA328P // Arduino Uno CPU
+#define CPU_MAP_ATMEGA2560_RAMPS_1_4 // Arduino Mega 2560 + RAMPS 1.4 Board
 
 // Define realtime command special characters. These characters are 'picked-off' directly from the
 // serial read data stream and are not passed to the grbl line execution parser. Select characters
@@ -84,7 +86,9 @@
 // After homing, Grbl will set by default the entire machine space into negative space, as is typical
 // for professional CNC machines, regardless of where the limit switches are located. Uncomment this 
 // define to force Grbl to always set the machine origin at the homed location despite switch orientation.
-// #define HOMING_FORCE_SET_ORIGIN // Uncomment to enable.
+// PulpitRockCNC: Since we are using the X and Y min limit switches (and Z max limit switch) 
+// as homing switches, we need to force homing to zero
+#define HOMING_FORCE_SET_ORIGIN // Uncommented to enable (PulpitRockCNC)
 
 // Number of blocks Grbl executes upon startup. These blocks are stored in EEPROM, where the size
 // and addresses are defined in settings.h. With the current settings, up to 2 startup blocks may

grbl/cpu_map.h

@@ -37,6 +37,10 @@
   #include "cpu_map/cpu_map_atmega2560.h"
 #endif
 
+#ifdef CPU_MAP_ATMEGA2560_RAMPS_1_4 // (Arduino Mega 2560)+Ramps1.4 Working Arsi
+  #include "cpu_map/cpu_map_atmega2560_ramps14.h"
+#endif
+
 /* 
 #ifdef CPU_MAP_CUSTOM_PROC
   // For a custom pin map or different processor, copy and edit one of the available cpu

grbl/cpu_map/cpu_map_atmega2560_ramps14.h

@@ -0,0 +1,210 @@
+/*
+  cpu_map_atmega2560_ramps14.h - CPU and pin mapping configuration file
+  Part of Grbl
+
+  Copyright (c) 2012-2015 Sungeun K. Jeon
+
+  Grbl 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.
+
+  Grbl 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 Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This cpu_map file serves as a central pin mapping settings file for AVR Mega 2560 + RAMPS 1.4 
+   PIN Mapping can be found here: https://www.arduino.cc/en/Hacking/PinMapping2560
+*/
+
+
+#ifdef GRBL_PLATFORM
+#error "cpu_map already defined: GRBL_PLATFORM=" GRBL_PLATFORM
+#endif
+
+
+#define GRBL_PLATFORM "Atmega2560_Ramps14"
+
+// Serial port pins
+#define SERIAL_RX USART0_RX_vect
+#define SERIAL_UDRE USART0_UDRE_vect
+
+// Increase Buffers to make use of extra SRAM
+//#define RX_BUFFER_SIZE		256
+//#define TX_BUFFER_SIZE		128
+//#define BLOCK_BUFFER_SIZE	36
+//#define LINE_BUFFER_SIZE	100
+
+// Define step pulse output pins. 
+// NOTE: Originally grbl require that all step bit pins must be on the same port.
+// HOWEVER: X and Y is on same port while Z is on another, therefore a special method from ramps.h is needed
+#define X_STEP_BIT    0 // Position within the STEP MASK
+#define Y_STEP_BIT    1 // Position within the STEP MASK
+#define Z_STEP_BIT    2 // Position within the STEP MASK
+#define STEP_MASK ((1<<X_STEP_BIT)|(1<<Y_STEP_BIT)|(1<<Z_STEP_BIT)) // All step bits
+
+// Define step direction output pins. 
+// NOTE: Originally grbl require that all direction pins must be on the same port
+// HOWEVER X and Y is on same port while Z is on another, therefore a special method from ramps.h is needed
+#define X_DIRECTION_BIT   0 // Position within the DIRECTION MASK
+#define Y_DIRECTION_BIT   1 // Position within the DIRECTION MASK
+#define Z_DIRECTION_BIT   2 // Position within the DIRECTION MASK
+#define DIRECTION_MASK ((1<<X_DIRECTION_BIT)|(1<<Y_DIRECTION_BIT)|(1<<Z_DIRECTION_BIT)) // All direction bits
+
+// NOTE: Originally grbl require an enable/disable output pin for the stepper driver.
+// HOWEVER: None of the driver enable pins are on the same port, therefore a special method from ramps.h is needed
+#define STEPPERS_DISABLE_BIT   0 // A bit position used to determine if the steppers are enabled or disabled, any number should work
+
+// Define homing/hard limit switch input pins and limit interrupt vectors. 
+// NOTE: Originally grbl require that all limit bit pins must be on the same port 
+// HOWEVER: None of them are! Therefore a special method from ramps.h is needed
+// MEGA2560 Digital Pin 3,  X_MIN_PIN, PE5 ( OC3C/INT5 )
+// MEGA2560 Digital Pin 14, Y_MIN_PIN, PJ1 ( TXD3/PCINT10 )
+// MEGA2560 Digital Pin 19, Z_MAX_PIN, PD2 ( RXDI/INT2 )
+#define X_LIMIT_BIT     2 // Position within the LIMIT MASK
+#define Y_LIMIT_BIT     1 // Position within the LIMIT MASK
+#define Z_LIMIT_BIT     0 // Position within the LIMIT MASK
+#define LIMIT_MASK ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All limit bits
+
+// MEGA2560 Digital Pin 3,  X_MIN_PIN, PE5 ( OC3C/INT5 )
+// X_MIN uses external interrupts
+#define X_MIN_INT      INT5  	 // INTx bit in EIMSK 
+#define X_MIN_ICR      EICRB 	 // Int. Config Register (EICRA/B) 
+#define X_MIN_ISCX0    ISC50 	 // Interrupt Sense Config bit0 
+#define X_MIN_ISCX1    ISC51 	 // Interrupt Sense Config bit1 
+#define X_MIN_INT_vect INT5_vect // Pin Change Interrupt Vector
+#define X_MIN_FR       INTF5 	 // Interrupt Flag Register
+
+// MEGA2560 Digital Pin 19, Z_MAX_PIN, PD2 ( RXDI/INT2 )
+// Z_MAX uses external interrupts
+#define Z_MAX_INT      INT2  	 // INTx bit in EIMSK 
+#define Z_MAX_ICR      EICRA 	 // Int. Config Register (EICRA/B) 
+#define Z_MAX_ISCX0    ISC20 	 // Interrupt Sense Config bit0 
+#define Z_MAX_ISCX1    ISC21 	 // Interrupt Sense Config bit1 
+#define Z_MAX_INT_vect INT2_vect // Pin Change Interrupt Vector
+#define Z_MAX_FR       INTF2 	 // Interrupt Flag Register
+
+// MEGA2560 Digital Pin 14, Y_MIN_PIN, PJ1 ( TXD3/PCINT10 )
+// Y_MIN uses pin change interrupts
+#define Y_MIN_PCI       PCINT10     // Pin Change Interrupt
+#define Y_MIN_INT       PCIE1       // Pin Change Interrupt Enable Pin
+// PCIE0 = Any change on any enabled PCINT7:0 pin will cause an interrupt (Port B)
+// PCIE1 = Any change on any enabled PCINT15:8 pin will cause an interrupt (Port J)
+// PCIE2 = Any change on any enabled PCINT23:16 pin will cause an interrupt (Port K)
+#define Y_MIN_INT_vect  PCINT1_vect // Pin Change Interrupt Vector
+#define Y_MIN_PCMSK     PCMSK1      // Pin Change Mask Register
+#define Y_MIN_FR        PCIF1       // Pin Change Interrupt Flag Register
+
+// Define spindle enable and spindle direction output pins.
+// On the RAMPS board these can be found under SERVOS
+#define SPINDLE_ENABLE_DDR      DDRH
+#define SPINDLE_ENABLE_PORT     PORTH
+#define SPINDLE_ENABLE_BIT      3 // MEGA2560 Digital Pin 6, PH3 ( OC4A )
+#define SPINDLE_DIRECTION_DDR   DDRE
+#define SPINDLE_DIRECTION_PORT  PORTE
+#define SPINDLE_DIRECTION_BIT   3 // MEGA2560 Digital Pin 5, PE3 ( OC3A/AIN1 )
+
+// Define flood and mist coolant enable output pins.
+// NOTE: Uno analog pins 4 and 5 are reserved for an i2c interface, and may be installed at
+// a later date if flash and memory space allows.
+// On the RAMPS board these can be found under AUX-1
+#define COOLANT_FLOOD_DDR     DDRE
+#define COOLANT_FLOOD_PORT    PORTE
+#define COOLANT_FLOOD_BIT     0 // MEGA2560 Digital Pin 0, PE0 ( RXD0/PCINT8 )
+#ifdef ENABLE_M7 // Mist coolant disabled by default. See config.h to enable/disable.
+  #define COOLANT_MIST_DDR      DDRE
+  #define COOLANT_MIST_PORT     PORTE
+  #define COOLANT_MIST_BIT      1 // MEGA2560 Digital Pin 1, PE1 ( TXD0 )
+#endif  
+
+// Define user-control CONTROLs (cycle start, reset, feed hold) input pins.
+// NOTE: All CONTROLs pins must be on the same port and not on a port with other input pins (limits).
+// On the RAMPS board these can be found under AUX-2
+#define CONTROL_DDR       DDRK
+#define CONTROL_PIN       PINK
+#define CONTROL_PORT      PORTK
+#define RESET_BIT         1  // MEGA2560 Analog Pin 9, PK1 ( ADC9/PCINT17 )
+#define FEED_HOLD_BIT     2  // MEGA2560 Analog Pin 10, PK2 ( ADC10/PCINT18 )
+#define CYCLE_START_BIT   3  // MEGA2560 Analog Pin 11, PK3 ( ADC11/PCINT19 )
+#define SAFETY_DOOR_BIT   4  // MEGA2560 Analog Pin 12, PK4 ( ADC12/PCINT20 )
+#define CONTROL_INT       PCIE2  // Pin change interrupt enable pin
+#define CONTROL_INT_vect  PCINT2_vect
+#define CONTROL_PCMSK     PCMSK2 // Pin change interrupt register
+#define CONTROL_MASK ((1<<RESET_BIT)|(1<<FEED_HOLD_BIT)|(1<<CYCLE_START_BIT)|(1<<SAFETY_DOOR_BIT))
+#define CONTROL_INVERT_MASK CONTROL_MASK // May be re-defined to only invert certain control pins.
+
+// Define probe switch input pin.
+// On the RAMPS board the Z probe (touch plate) is connected to the Z_MIN pin (D18)
+#define PROBE_DDR       DDRD
+#define PROBE_PIN       PIND
+#define PROBE_PORT      PORTD
+#define PROBE_BIT       3  // MEGA2560 Digital Pin 18, PD3 ( TXD1/INT3 )
+#define PROBE_MASK      (1<<PROBE_BIT)
+
+// Start of PWM & Stepper Enabled Spindle
+#ifdef VARIABLE_SPINDLE
+  // Advanced Configuration Below You should not need to touch these variables
+  // Set Timer up to use TIMER4B which is attached to Digital Pin 7
+  #define PWM_MAX_VALUE     65535.0
+  #define TCCRA_REGISTER    TCCR4A
+  #define TCCRB_REGISTER    TCCR4B
+  #define OCR_REGISTER      OCR4B
+
+  #define COMB_BIT          COM4B1
+  #define WAVE0_REGISTER    WGM40
+  #define WAVE1_REGISTER    WGM41
+  #define WAVE2_REGISTER    WGM42
+  #define WAVE3_REGISTER    WGM43
+
+  #define SPINDLE_PWM_DDR   DDRH
+  #define SPINDLE_PWM_PORT  PORTH
+  #define SPINDLE_PWM_BIT   4 // MEGA2560 Digital Pin 7, PH4 ( OC4B )
+#endif // End of VARIABLE_SPINDLE
+
+// RAMPS 1.4 Pin assignments
+// Taken from Marlin pins.h (BOARD_RAMPS_13_EFF) and http://reprap.org/wiki/RAMPS_1.4
+#define X_STEP_PIN         54
+#define X_DIR_PIN          55
+#define X_ENABLE_PIN       38
+#define X_MIN_PIN           3
+#define X_MAX_PIN           2
+
+#define Y_STEP_PIN         60
+#define Y_DIR_PIN          61
+#define Y_ENABLE_PIN       56
+#define Y_MIN_PIN          14
+#define Y_MAX_PIN          15
+
+#define Z_STEP_PIN         46
+#define Z_DIR_PIN          48
+#define Z_ENABLE_PIN       62
+#define Z_MIN_PIN          18
+#define Z_MAX_PIN          19
+
+#define E0_STEP_PIN        26
+#define E0_DIR_PIN         28
+#define E0_ENABLE_PIN      24
+
+#define E1_STEP_PIN        36
+#define E1_DIR_PIN         34
+#define E1_ENABLE_PIN      30
+
+#define SDPOWER            -1
+#define SDSS               53
+#define LED_PIN            13
+
+#define FAN_PIN             9
+
+#define PS_ON_PIN          12
+#define KILL_PIN           -1
+
+#define HEATER_0_PIN       10
+#define HEATER_1_PIN        8
+#define TEMP_0_PIN         13   // ANALOG NUMBERING
+#define TEMP_1_PIN         14   // ANALOG NUMBERING
+#define TEMP_2_PIN         15   // ANALOG NUMBERING

grbl/defaults.h

@@ -88,4 +88,15 @@
   #include "defaults/defaults_simulator.h"
 #endif
 
+#ifdef DEFAULTS_CYCLONE_2_1
+  // Description: GRBL settings for Cyclone PCB Factory v2.1
+  // http://reprap.org/wiki/Cyclone_PCB_Factory
+  #include "defaults/defaults_cyclone2_1.h"
+#endif
+
+#ifdef DEFAULTS_PULPITROCKCNC
+  // Grbl settings for the RAMPS 1.4 based PulpitRockCNC machine v1.0.
+  #include "defaults/defaults_pulpitrockcnc.h"
+#endif
+
 #endif

grbl/defaults/defaults_cyclone2_1.h

@@ -0,0 +1,70 @@
+/*
+  defaults_cyclone2_1.h - GRBL settings for Cyclone PCB Factory v2.1
+  http://reprap.org/wiki/Cyclone_PCB_Factory
+  Part of Grbl
+
+  Copyright (c) 2012-2015 Sungeun K. Jeon
+
+  Grbl 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.
+
+  Grbl 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 Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* The defaults.h file serves as a central default settings file for different machine
+   types, from DIY CNC mills to CNC conversions of off-the-shelf machines. The settings
+   here are supplied by users, so your results may vary. However, this should give you
+   a good starting point as you get to know your machine and tweak the settings for your
+   nefarious needs. */
+
+#ifndef defaults_h
+#define defaults_h
+
+  // Description: GRBL settings for Cyclone PCB Factory v2.1
+  // http://reprap.org/wiki/Cyclone_PCB_Factory
+  #define MICROSTEPS 16 // 16 --> all three jumpers installed
+  #define STEPS_PER_REV 200.0
+  #define MM_PER_REV 1.25 // 1.25 mm/rev leadscrew
+  #define Cyclone_XY_Gear_Ratio 21.0/21.0 // Number of gear teeth (motor/rod)
+  #define Cyclone_Z_Gear_Ratio 8.0/15.0 // Number of gear teeth (motor/rod)
+  #define DEFAULT_X_STEPS_PER_MM (STEPS_PER_REV*MICROSTEPS/(Cyclone_XY_Gear_Ratio*MM_PER_REV))
+  #define DEFAULT_Y_STEPS_PER_MM (STEPS_PER_REV*MICROSTEPS/(Cyclone_XY_Gear_Ratio*MM_PER_REV))
+  #define DEFAULT_Z_STEPS_PER_MM (STEPS_PER_REV*MICROSTEPS/(Cyclone_Z_Gear_Ratio*MM_PER_REV))
+  #define DEFAULT_X_MAX_RATE 5*60.0 // mm/min
+  #define DEFAULT_Y_MAX_RATE 5*60.0 // mm/min
+  #define DEFAULT_Z_MAX_RATE 2.5*60.0 // mm/min
+  #define DEFAULT_X_ACCELERATION (16.0*60*60) // 50*60*60 mm/min^2 = 50 mm/sec^2
+  #define DEFAULT_Y_ACCELERATION (16.0*60*60) // 50*60*60 mm/min^2 = 50 mm/sec^2
+  #define DEFAULT_Z_ACCELERATION (16.0*60*60) // 50*60*60 mm/min^2 = 50 mm/sec^2
+  #define DEFAULT_X_MAX_TRAVEL 168.0 // mm
+  #define DEFAULT_Y_MAX_TRAVEL 101.0 // mm
+  #define DEFAULT_Z_MAX_TRAVEL 50.0 // mm
+  #define DEFAULT_STEP_PULSE_MICROSECONDS 10
+  #define DEFAULT_STEPPING_INVERT_MASK 0
+  #define DEFAULT_DIRECTION_INVERT_MASK ((0<<X_AXIS)|(0<<Y_AXIS)|(1<<Z_AXIS))
+  #define DEFAULT_STEPPER_IDLE_LOCK_TIME 255 // msec (0-254, 255 keeps steppers enabled)
+  #define DEFAULT_STATUS_REPORT_MASK ((BITFLAG_RT_STATUS_MACHINE_POSITION)|(BITFLAG_RT_STATUS_WORK_POSITION))
+  #define DEFAULT_JUNCTION_DEVIATION 0.02 // mm
+  #define DEFAULT_ARC_TOLERANCE 0.002 // mm
+  #define DEFAULT_REPORT_INCHES 0 // false
+  #define DEFAULT_AUTO_START 1 // true
+  #define DEFAULT_INVERT_ST_ENABLE 0 // false
+  #define DEFAULT_INVERT_LIMIT_PINS 0 // false
+  #define DEFAULT_SOFT_LIMIT_ENABLE 1 // true
+  #define DEFAULT_HARD_LIMIT_ENABLE 0  // false
+  #define DEFAULT_HOMING_ENABLE 1  // true
+  #define DEFAULT_HOMING_DIR_MASK ((1<<X_AXIS)|(1<<Y_AXIS)|(0<<Z_AXIS)) // in Cyclone, z axis is left to move upwards, in case Z homing is triggered (there is no Z endstop!)
+  #define DEFAULT_HOMING_FEED_RATE 50.0 // mm/min (slower feed rate to "bump" the endstops)
+  #define DEFAULT_HOMING_SEEK_RATE 635.0 // mm/min (will saturate to MAX_RATE)
+  #define DEFAULT_HOMING_DEBOUNCE_DELAY 250 // msec (0-65k)
+  #define DEFAULT_HOMING_PULLOFF 0.0 // mm (distance that the axis move after homing)
+
+#endif