57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "Marlin.h"
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#if ENABLED(USE_WATCHDOG)
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#include "watchdog.h"
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// Initialize watchdog with a 4 sec interrupt time
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void watchdog_init() {
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#if ENABLED(WATCHDOG_RESET_MANUAL)
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// We enable the watchdog timer, but only for the interrupt.
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// Take care, as this requires the correct order of operation, with interrupts disabled. See the datasheet of any AVR chip for details.
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wdt_reset();
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_WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
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_WD_CONTROL_REG = _BV(WDIE) | WDTO_4S;
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#else
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wdt_enable(WDTO_4S);
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#endif
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}
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//===========================================================================
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//=================================== ISR ===================================
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//===========================================================================
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// Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
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#if ENABLED(WATCHDOG_RESET_MANUAL)
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ISR(WDT_vect) {
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SERIAL_ERROR_START;
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SERIAL_ERRORLNPGM("Something is wrong, please turn off the printer.");
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kill(PSTR("ERR:Please Reset")); //kill blocks //16 characters so it fits on a 16x2 display
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while (1); //wait for user or serial reset
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}
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#endif // WATCHDOG_RESET_MANUAL
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#endif // USE_WATCHDOG
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