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Altera_Forum's avatar
Altera_Forum
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21 years ago

about component made by user logic

hello, anyone encounter this problem that a component made by user logic can't run with nios system that has comprised ram and flash and so on? who can give me some suggesti...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Are you using data cache by any chance (f core)? If so, when you do your read/write to it you need to bypass the data cache. If you read or write without doing this the data may get cached and the next access may come straight from the cache instead of the external logic that you made.

IOWR_32DIRECT(base, offset, data) // to write bypassing cache

int IORD_32DIRECT(base, offset) // to read bypassing cache

And if that's not the cause let us know.

Cheers