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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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1. The one in the NIOS II Software Developer's handbook tells me to use two functions:

alt_irq_interruptible() and alt_irq_non_interruptible()

to "bracket code in a processor-intensive ISR.

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I would use that in order to make your ISR interruptible.

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2. In the NIOS II Processor Reference Handbook it tells to enable nested interrupts by setting the status.PIE Register to 1 near the beginnung of an ISR. How? By calling alt_irq_enable_all()? If yes, which argument should I apply?

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I think, this is done by alt_irq_interruptible().

Regards