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Altera_Forum
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15 years ago

What is/are the right SOPC compenent(s) for my project?

Hi, what I'm trying to do is the following: I have an ADC which runs at say 80 MSPs. I have a Nios II that runs at 50 (or less) MHz. I would like to have a (or more) avalon component(...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The part where you are reading back the data you are using IORD_32DIRECT which means you have to pass in byte offsets (and they must be a multiple of 4 since Nios II does not support unaligned accesses). i.e. use this instead:

if (IORD_32DIRECT(SRAM_BASE, 4*testNumber) != testNumber)

I saw some other spots where you were using IOWR_32DIRECT, you probably will have to do the same 4* there too.

For example if I wanted to read back words from 'SSRAM_BASE' I would do this:

IORD_32DIRECT(SSRAM_BASE, 0)

IORD_32DIRECT(SSRAM_BASE, 4)

IORD_32DIRECT(SSRAM_BASE, 8)

etc...