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Altera_Forum's avatar
Altera_Forum
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15 years ago

NIOS + IRQ + custom component

Hi, I'm trying to interrupt a Nios Prosessor whit a Custom Component and setup a successful interrupt routine. But I can't Do it. The problem is that i can't find a complete example of a custo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

It isn't obvious to me where the delay might be.

One common way to wait for a 'posted' write to complete is to issue a read of the same address (for uncached locations the written data can't be used to satisfy the read).

However the nios doesn't do posted writes to the avalon fabric (it would be a useful feature, even if only one write were posted and all reads waited).

Are you 100% sure the write isn't going through the data cache?