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

need help with my own peripheral device

I have finished writing a peripheral device. it communicates with niosII cpu using avalon-mm bus. but when i read from it, i can't get the value i want. and writing to it also has no effect on...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

The best way to debug something like this is to add SignalTap probes on the Avalon bus and your component's external interfaces, and see what is happening.

When you created your component, did you remember to increase the read wait cycles from the default 1 to 2?