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Honored Contributor

21 years ago

Interrupt priority?

The number of IRQ is the same as number of priority? Other words, IRQ 0 has small priority, IRQ5 has a high priority?

Honored Contributor

21 years ago

from Nios Software Handbook chapter 6-6 page 101

Registering an ISR with alt_irq_register()

...

■ id is the hardware interrupt number for the device, as defined in

system.h. Interrupt priority corresponds inversely to the IRQ

number. Therefore, IRQ 0 represents the highest priority interrupt

and IRQ 31 is the lowest.

...