Hi, The code halts in both the hardware running standalone and in debug mode. I am trying to figure out if it is related to a software timer below which is about debouncing of a switch. UPDATE: the exception that occurs: happens either when exiting CBK_ChangeNotif_ProdTrigger() or after executin…

Is CBK_ChangeNotif_ProdTrigger a function called by an ISR ? You mentioned it’s an INT callback. In this case it’d be crucial to use FromISR API calls.

[image] Rik001: The code halts Please always say what ‘halts’ means. I don’t think it ever truly halts. It may be spinning in an exception handler, or an assert or whatever - what the processor is actually doing is always vital information when trying to offer assistance as to what the caus…

Thank you Richard and Hartmut, answers to both below. Hartmut, I did have portEND_SWITCHING_ISR(xHigherPriorityTaskWoken); as last line before exiting but it made no difference. I removed it while testing something and posted the code before putting it back in. I now updated the OP. Richard, wh…

[image] Rik001: void CBK_ChangeNotif_ProdTrigger(GPIO_PIN pin, uintptr_t context) { BaseType_t xHigherPriorityTaskWoken; xHigherPriorityTaskWoken = pdFALSE; taskENTER_CRITICAL(); uint32_t tmpDebounceState = app_applyData.ui32ProdTrigState; if ((tmpDebounceState == PROD_TRIG…

I changed all functions in the ISR to their FromISR version and it seems to work. Thank you both!! :slight_smile:

Use of configASSERT helps a lot in these cases, as rather than faulting it will go into an assertion loop showing where the bad line is.

Rik, you should also explain what the critical section is used for here. I don’t think you need it, and I’ve tried to explain several times why. In any case, it’s just coincidential that taskENTER_CRITICAL works in an ISR. For portability reasons, IF you need the CS here, you should be alert when y…

Thank you Richard and RAc, RAc, yes, you previously mentioned using a mutex instead. The issues is that I had a lot of code already done this way and being a novice at freeRTOS I am a bit worried it might break. The client has been putitng a lot of pressure because they need a demo for an exhibiti…

I’m sorry, Rik, I give up. Best of luck to you. There appears to be no way to help you, at least not in my words. If I had managed to bring over the message to you, you wouldn’t even think about a mutex in conjunction with ISRs. It can’t and won’t work, and I’ve told you so several times, yet to no…

Potential software timer issue

Kernel

hs2 (Hartmut Schaefer) April 19, 2021, 3:48pm 5

@Rik001 Please re-read your other related thread.
You’ve to use e.g. xTimerStartFromISR etc. along with taskENTER/EXIT_CRITICAL_FROM_ISR in ISRs.

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Potential software timer issue

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