STM32H755: LED on PB0 not blinking with EXTI interrupt on PA0 (CM7, beginner)

[Quy]

Hello everyone,

I'm a beginner learning STM32 and working on a small project with the STM32H755 (NUCLEO-H755ZI-Q). I'm trying to use an EXTI interrupt on PA0 (push button) to toggle an LED on PB0 on the Cortex-M7 (CM7) core. I need help to figure out what's wrong!

Thanks a lot!

[MHoll.2 · Accepted solution]

Can You share you project so we can see what You are doing?

By default the User Button on the Nucleo-H755ZI-Q is on PC13, for PA0 You have to change the solder Jumpers.

[Quy]

Ah, that was a critical mistake on my part. Thanks so much for pointing it out — really appreciate your help!