QUERY · ISSUE

OpenMV Feature: WDT()

openby kwagyemanopened 2026-03-21updated 2026-03-21

enhancement

Description

WDT working for the STM32, MIMXRT, and Alif on the machine module.

All watchdog types need to work. For example, on the STM32, only the IWDG is implemented right now; however, this watchdog will reset you during deep sleep. There's another watchdog on the STM32 that turns off when in deep sleep.

Code Size

No response

Implementation

I hope the MicroPython maintainers or community will implement this feature

Code of Conduct

Yes, I agree

CANDIDATE · ISSUE

stmhal: WDT hangs after programming

openby dhylandsopened 2016-11-14updated 2024-08-28

bugport-stm32

I discovered an interesting quirk related to the IWDG.

If I program my pyboard using pydfu, then trying this in the REPL immediately afterwards hangs:

>>> wdt = machine.WDT(0, 5000)

By hangs, I mean it never returns the REPL. I added some debug prints and it seems to stuck in the IWDG->SR & 1 loop and the value of SR is 3.

If I hit the RESET button, then the wdt = machine.WDT(0, 5000) works exactly as expected.