My Marlin configs for Fabrikator Mini and CTC i3 Pro B
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watchdog.cpp 2.6KB

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  1. /**
  2. * Marlin 3D Printer Firmware
  3. * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  4. *
  5. * Based on Sprinter and grbl.
  6. * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
  7. *
  8. * This program is free software: you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation, either version 3 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  20. *
  21. */
  22. #include "Marlin.h"
  23. #if ENABLED(USE_WATCHDOG)
  24. #include "watchdog.h"
  25. // Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
  26. void watchdog_init() {
  27. #if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
  28. #define WDTO_NS WDTO_8S
  29. #else
  30. #define WDTO_NS WDTO_4S
  31. #endif
  32. #if ENABLED(WATCHDOG_RESET_MANUAL)
  33. // We enable the watchdog timer, but only for the interrupt.
  34. // Take care, as this requires the correct order of operation, with interrupts disabled.
  35. // See the datasheet of any AVR chip for details.
  36. wdt_reset();
  37. cli();
  38. _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
  39. _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
  40. // So worked for up to WDTO_2S
  41. sei();
  42. wdt_reset();
  43. #else
  44. wdt_enable(WDTO_NS); // The function handles the upper bit correct.
  45. #endif
  46. //delay(10000); // test it!
  47. }
  48. //===========================================================================
  49. //=================================== ISR ===================================
  50. //===========================================================================
  51. // Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
  52. #if ENABLED(WATCHDOG_RESET_MANUAL)
  53. ISR(WDT_vect) {
  54. sei(); // With the interrupt driven serial we need to allow interrupts.
  55. SERIAL_ERROR_START();
  56. SERIAL_ERRORLNPGM("Watchdog barked, please turn off the printer.");
  57. kill(PSTR("ERR:Watchdog")); //kill blocks //up to 16 characters so it fits on a 16x2 display
  58. while (1); //wait for user or serial reset
  59. }
  60. #endif // WATCHDOG_RESET_MANUAL
  61. #endif // USE_WATCHDOG