/*
  coolant_control.c - coolant control methods
  Part of Grbl

  Copyright (c) 2012-2016 Sungeun K. Jeon for Gnea Research LLC

  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/>.
*/

#include "grbl.h"


void coolant_init()
{
  COOLANT_FLOOD_DDR |= (1 << COOLANT_FLOOD_BIT); // Configure as output pin
  #ifdef ENABLE_M7
    COOLANT_MIST_DDR |= (1 << COOLANT_MIST_BIT);
  #endif
  coolant_stop();
}


// Returns current coolant output state. Overrides may alter it from programmed state.
uint8_t coolant_get_state()
{
  uint8_t cl_state = COOLANT_STATE_DISABLE;
  #ifdef INVERT_COOLANT_FLOOD_PIN
    if (bit_isfalse(COOLANT_FLOOD_PORT,(1 << COOLANT_FLOOD_BIT))) {
  #else
    if (bit_istrue(COOLANT_FLOOD_PORT,(1 << COOLANT_FLOOD_BIT))) {
  #endif
    cl_state |= COOLANT_STATE_FLOOD;
  }
  #ifdef ENABLE_M7
    #ifdef INVERT_COOLANT_MIST_PIN
      if (bit_isfalse(COOLANT_MIST_PORT,(1 << COOLANT_MIST_BIT))) {
    #else
      if (bit_istrue(COOLANT_MIST_PORT,(1 << COOLANT_MIST_BIT))) {
    #endif
      cl_state |= COOLANT_STATE_MIST;
    }
  #endif
  return(cl_state);
}


// Directly called by coolant_init(), coolant_set_state(), and mc_reset(), which can be at
// an interrupt-level. No report flag set, but only called by routines that don't need it.
void coolant_stop()
{
  #ifdef INVERT_COOLANT_FLOOD_PIN
    COOLANT_FLOOD_PORT |= (1 << COOLANT_FLOOD_BIT);
  #else
    COOLANT_FLOOD_PORT &= ~(1 << COOLANT_FLOOD_BIT);
  #endif
  #ifdef ENABLE_M7
    #ifdef INVERT_COOLANT_MIST_PIN
      COOLANT_MIST_PORT |= (1 << COOLANT_MIST_BIT);
    #else
      COOLANT_MIST_PORT &= ~(1 << COOLANT_MIST_BIT);
    #endif
  #endif
}


// Main program only. Immediately sets flood coolant running state and also mist coolant, 
// if enabled. Also sets a flag to report an update to a coolant state.
// Called by coolant toggle override, parking restore, parking retract, sleep mode, g-code
// parser program end, and g-code parser coolant_sync().
void coolant_set_state(uint8_t mode)
{
  if (sys.abort) { return; } // Block during abort.  
  
  if (mode == COOLANT_DISABLE) {
  
    coolant_stop(); 
  
  } else {
  
    if (mode & COOLANT_FLOOD_ENABLE) {
      #ifdef INVERT_COOLANT_FLOOD_PIN
        COOLANT_FLOOD_PORT &= ~(1 << COOLANT_FLOOD_BIT);
      #else
        COOLANT_FLOOD_PORT |= (1 << COOLANT_FLOOD_BIT);
      #endif
    }
  
    #ifdef ENABLE_M7
      if (mode & COOLANT_MIST_ENABLE) {
        #ifdef INVERT_COOLANT_MIST_PIN
          COOLANT_MIST_PORT &= ~(1 << COOLANT_MIST_BIT);
        #else
          COOLANT_MIST_PORT |= (1 << COOLANT_MIST_BIT);
        #endif
      }
    #endif
  
  }
  sys.report_ovr_counter = REPORT_OVR_REFRESH_BUSY_COUNT; // Set to report change immediately
}


// G-code parser entry-point for setting coolant state. Forces a planner buffer sync and bails 
// if an abort or check-mode is active.
void coolant_sync(uint8_t mode)
{
  if (sys.state == STATE_CHECK_MODE) { return; }
  protocol_buffer_synchronize(); // Ensure coolant turns on when specified in program.
  coolant_set_state(mode);
}