What happend if Callback take longer... about duetimer

[ivanseidel]

Try this and let me know if works:

void sequenceHandler(){
    // Disable Interrupts
    noInterrupts();

    // Do something that may take longer...
    while(something());

    // Enable Interrupts again and exit
    interrupts();
}

If that doesn't work let me know @xxseabxx

[l-mb]

I thought interrupts are automatically disabled in an ISR; so no need to explicitly call noInterrupts(). If your ISR takes longer, new interrupts are queued, and will be delivered afterward (but not multiple times for the same IRQ). Of course, then your timing is screwed up.

I think the best way for what you want would be to find an alternative to the busy wait in the ISR. Since you're waiting for a HIGH->LOW transition on a digital PIN, you can handle that via an interrupt too:

attachInterrupt(pinEOC, handler, FALLING);

That'll probably need some reshuffling of your code to be more event-driven.

[qbsho]

Thanks for the fast reply.
I will try it out in the next few days!

@l-mb I'm not sure how to change my code to work with the attachInterrupt - but i'm also the opinion it's better to work outside the sequence

I let you know my experience
Thanks

[ivanseidel]

@xxseabxx
Any news? I want to close this if possible

[qbsho]

Hello
I handle this with the
attachInterrupt(pinEOC, handler, FALLING);

thanks for you reply and help.
regards sebastian