embedded runtime_error ai_generated true

IWDG reset detected: system restarted by independent watchdog timeout

ID: embedded/watchdog-timeout-reset

Also available as: JSON · Markdown
80%Fix Rate
85%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
32 active — — —

Root Cause

Watchdog timer reset the MCU because firmware did not refresh it in time. Infinite loop, deadlock, or blocking delay.

generic

Workarounds

  1. 88% success Check reset source register to confirm watchdog reset 
    if (RCC->CSR & RCC_CSR_IWDGRSTF) { /* IWDG caused reset */ } RCC->CSR |= RCC_CSR_RMVF;

    Sources: https://openocd.org/doc/html/

  2. 90% success Add watchdog refresh in all long-running loops and blocking waits 
    while (wait_for_sensor()) { HAL_IWDG_Refresh(&hiwdg); }  // prevent timeout during legitimate waits
  3. 82% success Use a dedicated low-priority RTOS task to feed the watchdog 
    If lowest-priority task runs, all higher-priority tasks are not starving the system.

Dead Ends

Common approaches that don't work:

  1. Disable the watchdog entirely 88% fail

    Watchdog exists for safety/reliability. Disabling it hides the root cause; system hangs without recovery.

  2. Increase watchdog timeout to maximum value 70% fail

    Masks the problem temporarily. If code hangs for even longer, the crash returns.