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Altera_Forum's avatar
Altera_Forum
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10 years ago

Nios2 gen2 interrupts getting disabled

I have just ported a project that's been working for years with a Nios2-gen1 processor to the new Nios2-gen2. Everything seems to be working fine except for one strange problem, I'm finding my inter...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

This is interesting that you are having this issue as well.

About a month ago, I was working on a design where the IRQ was not being recieved by the NIOS.

If I implemented the NIOS as a sub Qsys system, it would not work.

If I implemeted the NIOS as a stand alone Qsys system, it would work.

ienable and the status register were always 0 and could not be written to in the "sub-system case".

The issue was solved by using an IRQ bridge.

Sounds like there are a few Nios IRQ issues out there.