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Altera_Forum
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16 years ago

Nios interrupt response time

I have a custom SOPC component which has an interrupt sender (irq_n) in it's avalon interface. In my SOPC component HDL I set the irq_n line low, which causes a Nios interrupt handler to fire. In the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I'm investigating a similar problem under 9.1.

NIOS loses uart interrupts (characters) if data cache is turned off.

Either standard or fast cores.

Either standard interrupt controller or vectored interrupt controller.

I took "hello_world.c" and put a "gets()" in a loop and it drops characters like crazy.

It works fine if the data cache is turned on at 512.

I've lost a lot of time to this.

Mike