Hello dear ST community,
I am working on ST boards for a while. However, this is my first time on community questions, sorry for any mistakes.
Facts:
- CubeIDE 1.16.1
- STM32F746 Discovery board.
- TIM1 interrupt enabled and interrupt period is 1MS. (ARR = 21600-1, PSC = 10-1)
- I change my OUTPUT pins connected to inputs on same board with some delays (delays are between 100 and 1000 ms)
- Try to see the variables on debug mode after pin changes.
- There is a state machine working on interrupt routine.
Problem:
While trying to see variable values, I put breakpoints in while() loop. However, if the interrupt frequency is as high as 1000 Hz, my debug mode stops in breakpoints and when I click resume debug stays in same breakpoint and nothing changes. But when I remove breakpoints and resume, code flows correctly (I can see values changing if I stop run or remove and put debug points).
When IT frequency is low as 1, 2, 5... Hz I can see debug stops on breakpoints and resumes.
Thoughts:
I am thinking that, high frequency of TIM IT is causing very fast interrupts that cannot be caught in debug mode. Or running a state machine instead of just simply changing any flags in IT can cause IT process took so long.
More Detailed:
I have watched TIM1 status register -> Update Interrupt Flag and UIF cant be seen as 0 when problem is on. It is somehow not cleared or can not be visualized in debug mode because of the speed.
I would be appreciate if you could help!
Have a great day.
