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Altera_Forum's avatar
Altera_Forum
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15 years ago

Interrupt priority IIR

Hi all, I'm using the NIOSII with an Internal Interrupt Controller (IIR) and 8 IRQ's triggered by PIO edges. I assigned a number to each one of the IRQs which represents it's priority where a l...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi!

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My first ideas for your problem would be to set the non-interruptible IRQ to highest priority or to disable all other IRQ's while inside the ISR. But I guess you already thought about this :P

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Well, Yes and No;-) If you have more than one IRQ which should not be interrupted, the highest priority thing does not work acceptably.

But disabling all might me a solution .... Though I could imagine that the IRQ can be interrupted just the moment you are executing the disabling-all stuff.

But at the moment I am lucky. I do not need it yet:-)

Thanks for your suggestion!