/*
  cpu_map.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/>.
*/

/* The cpu_map.h file serves as a central pin mapping settings file for different processor
   types, i.e. AVR 328p or AVR Mega 2560. Grbl officially supports the Arduino Uno, but the 
   other supplied pin mappings are supplied by users, so your results may vary. */

// NOTE: This is still a work in progress. We are still centralizing the configurations to
// this file, so your success may vary for other CPUs.

#ifndef cpu_map_h
#define cpu_map_h


//----------------------------------------------------------------------------------------

#ifdef CPU_MAP_ATMEGA328P // (Arduino Uno) Officially supported by Grbl.

  // Define serial port pins and interrupt vectors.
  #define SERIAL_RX     USART_RX_vect
  #define SERIAL_UDRE   USART_UDRE_vect

  // Define step pulse output pins. NOTE: All step bit pins must be on the same port.
  #define STEP_DDR        DDRD
  #define STEP_PORT       PORTD
  #define X_STEP_BIT      2  // Uno Digital Pin 2
  #define Y_STEP_BIT      3  // Uno Digital Pin 3
  #define Z_STEP_BIT      4  // Uno Digital Pin 4
  #define STEP_MASK       ((1<<X_STEP_BIT)|(1<<Y_STEP_BIT)|(1<<Z_STEP_BIT)) // All step bits

  // Define step direction output pins. NOTE: All direction pins must be on the same port.
  #define DIRECTION_DDR     DDRD
  #define DIRECTION_PORT    PORTD
  #define X_DIRECTION_BIT   5  // Uno Digital Pin 5
  #define Y_DIRECTION_BIT   6  // Uno Digital Pin 6
  #define Z_DIRECTION_BIT   7  // Uno Digital Pin 7
  #define DIRECTION_MASK    ((1<<X_DIRECTION_BIT)|(1<<Y_DIRECTION_BIT)|(1<<Z_DIRECTION_BIT)) // All direction bits

  // Define stepper driver enable/disable output pin.
  #define STEPPERS_DISABLE_DDR    DDRB
  #define STEPPERS_DISABLE_PORT   PORTB
  #define STEPPERS_DISABLE_BIT    0  // Uno Digital Pin 8
  #define STEPPERS_DISABLE_MASK   (1<<STEPPERS_DISABLE_BIT)

  // Define homing/hard limit switch input pins and limit interrupt vectors. 
  // NOTE: All limit bit pins must be on the same port, but not on a port with other input pins (CONTROL).
  #define LIMIT_DDR        DDRB
  #define LIMIT_PIN        PINB
  #define LIMIT_PORT       PORTB
  #define X_LIMIT_BIT      1  // Uno Digital Pin 9
  #define Y_LIMIT_BIT      2  // Uno Digital Pin 10
  #ifdef VARIABLE_SPINDLE // Z Limit pin and spindle enabled swapped to access hardware PWM on Pin 11.  
    #define Z_LIMIT_BIT	   4 // Uno Digital Pin 12
  #else
    #define Z_LIMIT_BIT    3  // Uno Digital Pin 11
  #endif
  #define LIMIT_MASK       ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All limit bits
  #define LIMIT_INT        PCIE0  // Pin change interrupt enable pin
  #define LIMIT_INT_vect   PCINT0_vect 
  #define LIMIT_PCMSK      PCMSK0 // Pin change interrupt register

  // Define spindle enable and spindle direction output pins.
  #define SPINDLE_ENABLE_DDR    DDRB
  #define SPINDLE_ENABLE_PORT   PORTB
  #ifdef VARIABLE_SPINDLE // Z Limit pin and spindle enabled swapped to access hardware PWM on Pin 11.  
    #define SPINDLE_ENABLE_BIT    3  // Uno Digital Pin 11
  #else
    #define SPINDLE_ENABLE_BIT    4  // Uno Digital Pin 12
  #endif  
  #define SPINDLE_DIRECTION_DDR   DDRB
  #define SPINDLE_DIRECTION_PORT  PORTB
  #define SPINDLE_DIRECTION_BIT   5  // Uno Digital Pin 13 (NOTE: D13 can't be pulled-high input due to LED.)

  // 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.
  #define COOLANT_FLOOD_DDR   DDRC
  #define COOLANT_FLOOD_PORT  PORTC
  #define COOLANT_FLOOD_BIT   3  // Uno Analog Pin 3
  #ifdef ENABLE_M7 // Mist coolant disabled by default. See config.h to enable/disable.
    #define COOLANT_MIST_DDR   DDRC
    #define COOLANT_MIST_PORT  PORTC
    #define COOLANT_MIST_BIT   4 // Uno Analog Pin 4
  #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).
  #define CONTROL_DDR       DDRC
  #define CONTROL_PIN       PINC
  #define CONTROL_PORT      PORTC
  #define RESET_BIT         0  // Uno Analog Pin 0
  #define FEED_HOLD_BIT     1  // Uno Analog Pin 1
  #define CYCLE_START_BIT   2  // Uno Analog Pin 2
  #define SAFETY_DOOR_BIT   1  // Uno Analog Pin 1 NOTE: Safety door is shared with feed hold. Enabled by config define.
  #define CONTROL_INT       PCIE1  // Pin change interrupt enable pin
  #define CONTROL_INT_vect  PCINT1_vect
  #define CONTROL_PCMSK     PCMSK1 // Pin change interrupt register
  #define CONTROL_MASK ((1<<RESET_BIT)|(1<<FEED_HOLD_BIT)|(1<<CYCLE_START_BIT)|(1<<SAFETY_DOOR_BIT))
  
  // Define probe switch input pin.
  #define PROBE_DDR       DDRC
  #define PROBE_PIN       PINC
  #define PROBE_PORT      PORTC
  #define PROBE_BIT       5  // Uno Analog Pin 5
  #define PROBE_MASK      (1<<PROBE_BIT)

  
  #ifdef VARIABLE_SPINDLE
    // Advanced Configuration Below You should not need to touch these variables
    #define PWM_MAX_VALUE    255.0
    #define TCCRA_REGISTER	 TCCR2A
    #define TCCRB_REGISTER	 TCCR2B
    #define OCR_REGISTER     OCR2A

    #define COMB_BIT	     COM2A1
    #define WAVE0_REGISTER	 WGM20
    #define WAVE1_REGISTER	 WGM21
    #define WAVE2_REGISTER	 WGM22
    #define WAVE3_REGISTER	 WGM23

    // NOTE: On the 328p, these must be the same as the SPINDLE_ENABLE settings.
    #define SPINDLE_PWM_DDR	  SPINDLE_ENABLE_DDR
    #define SPINDLE_PWM_PORT  SPINDLE_ENABLE_PORT
    #define SPINDLE_PWM_BIT	  SPINDLE_ENABLE_BIT // Shared with SPINDLE_ENABLE.
  #endif // End of VARIABLE_SPINDLE

#endif


//----------------------------------------------------------------------------------------

#ifdef CPU_MAP_ATMEGA2560 // (Arduino Mega 2560) Working @EliteEng

  // 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: All step bit pins must be on the same port.
  #define STEP_DDR      DDRA
  #define STEP_PORT     PORTA
  #define STEP_PIN      PINA
  #define X_STEP_BIT    2 // MEGA2560 Digital Pin 24
  #define Y_STEP_BIT    3 // MEGA2560 Digital Pin 25
  #define Z_STEP_BIT    4 // MEGA2560 Digital Pin 26
  #define STEP_MASK ((1<<X_STEP_BIT)|(1<<Y_STEP_BIT)|(1<<Z_STEP_BIT)) // All step bits

  // Define step direction output pins. NOTE: All direction pins must be on the same port.
  #define DIRECTION_DDR     DDRC
  #define DIRECTION_PORT    PORTC
  #define DIRECTION_PIN     PINC
  #define X_DIRECTION_BIT   7 // MEGA2560 Digital Pin 30
  #define Y_DIRECTION_BIT   6 // MEGA2560 Digital Pin 31
  #define Z_DIRECTION_BIT   5 // MEGA2560 Digital Pin 32
  #define DIRECTION_MASK ((1<<X_DIRECTION_BIT)|(1<<Y_DIRECTION_BIT)|(1<<Z_DIRECTION_BIT)) // All direction bits

  // Define stepper driver enable/disable output pin.
  #define STEPPERS_DISABLE_DDR   DDRB
  #define STEPPERS_DISABLE_PORT  PORTB
  #define STEPPERS_DISABLE_BIT   7 // MEGA2560 Digital Pin 13
  #define STEPPERS_DISABLE_MASK (1<<STEPPERS_DISABLE_BIT)

  // NOTE: All limit bit pins must be on the same port
  #define LIMIT_DDR       DDRB
  #define LIMIT_PORT      PORTB
  #define LIMIT_PIN       PINB
  #define X_LIMIT_BIT     4 // MEGA2560 Digital Pin 10
  #define Y_LIMIT_BIT     5 // MEGA2560 Digital Pin 11
  #define Z_LIMIT_BIT     6 // MEGA2560 Digital Pin 12
  #define LIMIT_INT       PCIE0  // Pin change interrupt enable pin
  #define LIMIT_INT_vect  PCINT0_vect 
  #define LIMIT_PCMSK     PCMSK0 // Pin change interrupt register
  #define LIMIT_MASK ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All limit bits

  // Define spindle enable and spindle direction output pins.
  #define SPINDLE_ENABLE_DDR      DDRH
  #define SPINDLE_ENABLE_PORT     PORTH
  #define SPINDLE_ENABLE_BIT      3 // MEGA2560 Digital Pin 6
  #define SPINDLE_DIRECTION_DDR   DDRE
  #define SPINDLE_DIRECTION_PORT  PORTE
  #define SPINDLE_DIRECTION_BIT   3 // MEGA2560 Digital Pin 5

  // 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.
  #define COOLANT_FLOOD_DDR     DDRH
  #define COOLANT_FLOOD_PORT    PORTH
  #define COOLANT_FLOOD_BIT     5 // MEGA2560 Digital Pin 8
  #ifdef ENABLE_M7 // Mist coolant disabled by default. See config.h to enable/disable.
    #define COOLANT_MIST_DDR    DDRH
    #define COOLANT_MIST_PORT   PORTH
    #define COOLANT_MIST_BIT    6 // MEGA2560 Digital Pin 9
  #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).
  #define CONTROL_DDR       DDRK
  #define CONTROL_PIN       PINK
  #define CONTROL_PORT      PORTK
  #define RESET_BIT         0  // MEGA2560 Analog Pin 8
  #define FEED_HOLD_BIT     1  // MEGA2560 Analog Pin 9
  #define CYCLE_START_BIT   2  // MEGA2560 Analog Pin 10
  #define SAFETY_DOOR_BIT   3  // MEGA2560 Analog Pin 11
  #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 probe switch input pin.
  #define PROBE_DDR       DDRK
  #define PROBE_PIN       PINK
  #define PROBE_PORT      PORTK
  #define PROBE_BIT       7  // MEGA2560 Analog Pin 15
  #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 97
  #endif // End of VARIABLE_SPINDLE

#endif

//----------------------------------------------------------------------------------------

/* 
#ifdef CPU_MAP_CUSTOM_PROC
  // For a custom pin map or different processor, copy and paste one of the default cpu map
  // settings above and modify it to your needs. Then, make sure the defined name is also
  // changed in the config.h file.
#endif
*/

#endif