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Altera_Forum's avatar
Altera_Forum
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20 years ago

Multiple CPU or Nios II?

I'm working on a project that requires data to be read into a NIOS out of on chip FIFO. The data is then processed and stored onto a CF card. My problem is that their doesn't seem to b...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

The CF interface from Altera is basic and rigid. It works only in PIO 0 and TrueIDE.

If you want a real ATA interface and work with greater PIO modes, you need another way than tricking the Altera core. I needed big performance in writing on a CF as well, and I adapted the Wishbone OCIDEC core for avalon. It is simple to implement, I just mapped the avalon signals directly to the wishbone signals. I got inspired by the ocidec driver for linux to write the initialization code in my software. Feel free to contact me by mail if you want details.

Regards