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Altera_Forum's avatar
Altera_Forum
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15 years ago

SRAM nios II problem!!

Hi all, we have a custom board with an SRAM chip (same model is on the DE2 board). We are using this one because we could not get the SDRAM running. Well, we are also having problems with the S...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The memory test includes DMA transactions...."if" your system has a standard Avalon DMA in it. The DMA portion will hit the memory much faster back-to-back than any of the other tests. You should not skip this portion/feature of the memory tests..

You may be dealing with a situation where Nios II read master transactions are successful, but instruction master "fetches" are failing.

You could also just try adding a few read or write wait states to see if that helps to get the Nios II executing from the offchip memory. You can tune it later on.

Cheers,

slacker