stm32f4 hardfault

[jhasa.2]

hi

I use stm32f4 micro but an external interrupt pin

when i increase frequency of the external signal connected to interrupt pin, the micro jump to hardfault

why? how I can detect the solution?

[SRedd.5]

At what frequency of the external signal it goes to hardware fault? Below this frequency which function you are calling when interrupt happens?

[jhasa.2]

the interrupt routine is free and i commented all the code in it.

the frequency above 3khz will be Hard Fault.

how i can see the problem detail in hard fault?

[SRedd.5]

The sequence is step1: HAL_GPIO_EXTI_IRQHandler function is called and after that some issue happened and the hardfault handler is called. Can you show your code? In the interrupt handler can you toggle a port based on the external input signal, so both shall match for debugging purpose.

[jhasa.2]

I attached my code.

[Karl Yamashita]

Maybe something in get_sample() is causing an issue? 

Have you tried commenting out adc_read_value[adc_read_index]=get_sample(); to see if it still goes to hardfault?

[jhasa.2]

i remove all of the interrupt routine but it crashes.

only when i remove external interrupt it will be ok

why?

[Tesla DeLorean]

>>why?

These things don't need to be guessing games. Go identify what's actually faulting and work backward from there.

If you don't service interrupts in handlers, they'll keep entering.

Have a Hard Fault Handler that does something more useful that while(1), I've posted examples on multiple occasions on.

https://github.com/cturvey/RandomNinjaChef/blob/main/KeilHardFault.c

[jhasa.2]

this data is displayed on stm32cubeide

what i should with this data?

[SRedd.5]

What data?