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Update Watchdog description

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This commit is contained in:
Scott Lahteine
2019-04-27 14:38:12 +02:00
parent b6279abd30
commit 9ccbd382e7
76 changed files with 677 additions and 452 deletions
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15
Marlin/Configuration_adv.h
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@ -1004,14 +1004,17 @@
// @section safety
// The hardware watchdog should reset the microcontroller disabling all outputs,
// in case the firmware gets stuck and doesn't do temperature regulation.
/**
* The watchdog hardware timer will do a reset and disable all outputs
* if the firmware gets too overloaded to read the temperature sensors.
*
* If you find that watchdog reboot causes your AVR board to hang forever,
* enable WATCHDOG_RESET_MANUAL to use a custom timer instead of WDTO.
* NOTE: This method is less reliable as it can only catch hangups while
* interrupts are enabled.
*/
#define USE_WATCHDOG
#if ENABLED(USE_WATCHDOG)
// If you have a watchdog reboot in an ArduinoMega2560 then the device will hang forever, as a watchdog reset will leave the watchdog on.
// The "WATCHDOG_RESET_MANUAL" goes around this by not using the hardware reset.
// However, THIS FEATURE IS UNSAFE!, as it will only work if interrupts are disabled. And the code could hang in an interrupt routine with interrupts disabled.
//#define WATCHDOG_RESET_MANUAL
#endif