Watchdog is not resetting when it should do so (IWDG & WWDG)

[Michael Steinecke]

Posted on February 04, 2016 at 00:43

Hello folks,

I have a STM32F429ZG custom board. Occasionally it runs in a faulty state (after several days of running). I believe the stack gets corrupted, somehow.My problem is, I've configured both IWDG and WWDG watchdogs. Neither of them manages to reset the device when the error occurs. I can say for sure, the code that should retrigger the IWDG is not executed in that state. When I force the watchdogs by preventing the retrigger code from execution, (while(1) ...) they working as desired.Which circumstances can prevent both watchdogs from firing?Simliar behavior I've seen with a STM32F103ZG as well. #watchdog #wwdg #iwdg #!stm32f4

[Tesla DeLorean]

Posted on February 04, 2016 at 04:51

Driving NRST externally?

[pkumar1883]

Posted on February 04, 2016 at 07:23 Dear , Please have a look at this--

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32F107%20IWDG%20does%20not%20make%20a%20reset&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&curren...

[Tesla DeLorean]

Posted on February 04, 2016 at 12:20

Please review how to in-line cites