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Altera_Forum's avatar
Altera_Forum
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19 years ago

Setup an IRQ on a component

Hi , I made a "counter" component which I want to interrupt NIOS when reaching 8'h7. I also created a control register in which is bit IRDY (Interrupt Ready) I have 2 questions fo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Hi,

How long does your interupt signal stay high?Nios interupt is level sensitive, so maybe your interupt signal is too short and the processor doesn't detect the interupt.In general your peripheral should assert interupt pin, and it should stay high (or low) as long as the Nios acknoledges the interupt, for example writing a bit in a peripheral's register .It's only an idea...

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