WWDG interrupt keeps firing

Phang · ‎2025-09-22

Hi,

After configured the GPIO pins via STM32CudeMX and generated the code, when I run the firmware, the "WWDG_IRQHhandler()" problem keep appearing from no way and hinder me from the rest of the development. Please see the attached screen shoot picture. Even after I commented out the customize codes the problem didn't go away. Same problem seen on the P-NUCLEO-DONGLE too. I configured the MCU to support "USB HID + Zigbee".

Any help?

TDK · ‎2025-09-22

This is probably the default IRQ handler, which means you've enabled an interrupt that you haven't implemented in the code. Perhaps it's misspelled.

Look at VECTACTIVE bits in SCB to find out which interrupt it's actually in.

If you feel a post has answered your question, please click "Accept as Solution".

Phang · ‎2025-09-23

I see, OK I will check that. I will post here again if still facing the problem. Thanks.

Phang · ‎2025-09-25

Hi,

Based on your earlier reply, I can't find SCB register in the datasheet. What is the full name of SCB?

Can share with me the doc you have? By the way, when I reviewed the .ioc file via the CudeMX,

the WWDG wasn't select and used at all actually. Same code loaded into P-Nucleo-Dongle demo board also give me the same result.