Problem with GPIO Interrupts and RTOS STM32H753

SEfte.1 · ‎2022-11-29

Hello,

I am using an STM32H753 mcu and I working on a project with 8 GPIO Interrupt Pins. I am using RTX RTOS. The problem is that when the interrupt happens the same time with a thread activation. The mcu goes in dummy handler with bus Precision error due to corrupted stack pointer. I tried to reduce the priority of GPIO interrupts and problem remains. I also tried to reduce the priority of the thread and nothing happened.

Any Suggestions?

Thanks In Advance

Bubbles · ‎2022-11-29

Hi @SEfte.1,

it's normally not a problem to stack or chain interrupts on the H7. I think the problem is most likely caused by something done in the ISR.

BR,

J

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SEfte.1 · ‎2022-11-30

Hello and thank you for you reply @JHOUD ,

The only procedure taking place in ISR is that is set a software flag. I thought that maybe when more than one interrupt happens the same time with thread activation that's when the problem occurs. Do you think that somethig else is going on?