/**
 * MK & MK4due 3D Printer Firmware
 *
 * Based on Marlin, Sprinter and grbl
 * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
 * Copyright (C) 2013 - 2016 Alberto Cotronei @MagoKimbra
 *
 * 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/>.
 *
 */

#include "../../base.h"

#if ENABLED(USE_WATCHDOG)
  #include "watchdog.h"

  // Initialize watchdog with a 4 sec interrupt time
  void watchdog_init() {
    #if ENABLED(WATCHDOG_RESET_MANUAL)
      // We enable the watchdog timer, but only for the interrupt.
      // Take care, as this requires the correct order of operation, with interrupts disabled. See the datasheet of any AVR chip for details.
      wdt_reset();
      _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
      _WD_CONTROL_REG = _BV(WDIE) | WDTO_4S;
    #else
      wdt_enable(WDTO_4S);
    #endif
  }

  //===========================================================================
  //=================================== ISR ===================================
  //===========================================================================

  // Watchdog timer interrupt, called if main program blocks >1sec and manual reset is enabled.
  #if ENABLED(WATCHDOG_RESET_MANUAL)
    ISR(WDT_vect) {
      ECHO_LM(ER, "Something is wrong, please turn off the printer.");
      kill(PSTR("ERR:Please Reset")); //kill blocks //16 characters so it fits on a 16x2 display
      while (1); //wait for user or serial reset
    }
  #endif // WATCHDOG_RESET_MANUAL

#endif // USE_WATCHDOG
