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Altera_Forum
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19 years ago

How to write HAL ISRs for custom components

Hi experts, I created a custom component in the Component Editor and added it in a system containing only the Nios II and the component. I can write data from the Nios to my component; this is ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Basically, to register your ISR you do

alt_irq_init // enable irqs in control register 3 (nios proc ref book, chapter 3)

alt_irq_register // tie your ISR

alt_irq_enable // enable your IRQ

That should work.

__________

If you want to access CPU registers, you can use functions like:

alt_irq_pending (or NIOS2_READ_IPENDING),

alt_irq_enabled, alt_irq_enable, alt_irq_disable etc

Check the alt_irq.h for the reference.

Good luck