69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/**
|
|
* 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/>.
|
|
*
|
|
*/
|
|
|
|
#include "Marlin.h"
|
|
|
|
#if ENABLED(USE_WATCHDOG)
|
|
|
|
#include "watchdog.h"
|
|
|
|
// Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
|
|
void watchdog_init() {
|
|
#if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
|
|
#define WDTO_NS WDTO_8S
|
|
#else
|
|
#define WDTO_NS WDTO_4S
|
|
#endif
|
|
#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();
|
|
cli();
|
|
_WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
|
|
_WD_CONTROL_REG = _BV(WDIE) | (WDTO_NS & 0x07) | ((WDTO_NS & 0x08) << 2); // WDTO_NS directly does not work. bit 0-2 are consecutive in the register but the highest value bit is at bit 5
|
|
// So worked for up to WDTO_2S
|
|
sei();
|
|
wdt_reset();
|
|
#else
|
|
wdt_enable(WDTO_NS); // The function handles the upper bit correct.
|
|
#endif
|
|
//delay(10000); // test it!
|
|
}
|
|
|
|
//===========================================================================
|
|
//=================================== ISR ===================================
|
|
//===========================================================================
|
|
|
|
// Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
|
|
#if ENABLED(WATCHDOG_RESET_MANUAL)
|
|
ISR(WDT_vect) {
|
|
sei(); // With the interrupt driven serial we need to allow interrupts.
|
|
SERIAL_ERROR_START();
|
|
SERIAL_ERRORLNPGM("Watchdog barked, please turn off the printer.");
|
|
kill(PSTR("ERR:Watchdog")); //kill blocks //up to 16 characters so it fits on a 16x2 display
|
|
while (1); //wait for user or serial reset
|
|
}
|
|
#endif // WATCHDOG_RESET_MANUAL
|
|
|
|
#endif // USE_WATCHDOG
|