QUERY · 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.

CANDIDATE · PULL REQUEST

stmhal: Move debug UART repl to after uart_init0 call.

closedby dhylandsopened 2015-05-06updated 2015-11-08

Move the debug UART repl code to after uart_init0 call.

Otherwise, if you enable this code by changing #if 0 to #if 1, then as soon as you type anything on the uart repl, the pyboard hangs.