Rebooting the board with Ctrl-D doesn't clear the watchdog

[sebi5361]

I have noticed that when rebooting the board with Ctrl-D the watchdog remains on (if set before). It might be the same with machine.reset().

If I remember well, this was also the case on some other MicroPython ports but got fixed.

[pulkin]

A more general question is: how "soft" should soft reset be? Should it

[ ] reset cellular connectivity (disconnect from GPRS, etc) [ ] reset power setup (remove watchdog, disable GPIOs, disable gps, reset minimal frequency) [ ] reset time

maybe more?

[sebi5361]

I believe "soft" should be the same as when powering the board on. Your list seems exhaustive. I don't think we are missing anything.

I am not that sure, but it seems the reset button is not hard wired to resetting the board. I say this because it needs to be pressed and released, and in the debugger some kind of error shows up at that time. Maybe there is a way to trigger the very same process with the soft reset?

[pulkin]

Ok, I think it is a good first bug to fix for you or anyone else willing to contribute. What you need to do is:

1. Ensure it is convention (i.e. hardware watchdog is shut down on software reset for mp running on ESP8266/32/any other mainstream board);
2. Go to file modmachine.c and put modmachine_watchdog_off into modmachine_init0;

https://github.com/pulkin/micropython/blob/0b89a2f1fe074767c9de1881fd89a9b048a96156/ports/gprs_a9/modmachine.c#L43-L47

https://github.com/pulkin/micropython/blob/0b89a2f1fe074767c9de1881fd89a9b048a96156/ports/gprs_a9/modmachine.c#L183-L189

3. Put the declaration of modmachine_watchdog_off before modmachine_init0;
4. Build it and test if it works on the board;
5. PR here.

[sebi5361]

😎