Hard Fault after unlocking watchdog (KEA128)

[pranav_prabhu]

After coming out of stop, I am unlocking watchdog and reconfiguring it in the very next line. However, while unlocking MCU gets a hard fault. How do I prevent hard fault from occurring?

[pranav_prabhu]

Hello @Alice_Yang 

Currently when I try to put mcu in stop mode, it gets a hard reset.

[Alice_Yang]

Hello @pranav_prabhu 

How do you unlock the watchdog? Can it work well without unlocking the watchdog?

BR

Alice

[pranav_prabhu]

After waking up from stop mode, I need to configure the watchdog refresh again. At this point, I am getting a hard fault. This isn't seen when I configure before entering stop mode.

[Alice_Yang]

Hello @pranav_prabhu 

Thanks for your reply. I understand what you mean. Could you please first test by disabling the watchdog code after waking up from stop mode? Can it work properly then? We're doing this to narrow down the issue and confirm whether it's a watchdog configuration problem.

BR

Alice

[pranav_prabhu]

Hello @Alice_Yang 

I am in debug and put a breakpoint at the point where unlock is taking place. Is it because the clock cycles for unlock got elapsed.

[Alice_Yang · Accepted solution]

Hello @pranav_prabhu 

Please do not set breakpoints when configuring the Watchdog. Run the program at full speed for testing.

BR

Alice