Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Nios II hanging/crashing on PIO write?

I'm using a DE0-Nano board with a design which includes a NIOS II processor with a PIO module to flash the board's LEDs. No problems there - processor works, LEDs flash, jolly good. But, I...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hi again,

Further to my last post, I've found the original code works properly if I leave the new 24-bit and 1-bit PIO modules unconnected.

As soon as I connect either PIO to its relevant custom hardware module in the block schematic, the code will no longer function.

Any suggestions? There is precious little on the web about using multiple PIO modules in a NIOS II design. Presumably because they usually just work, haha. :)