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Altera_Forum's avatar
Altera_Forum
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14 years ago

dma instability

Hi...i am tring to copy memory from sram to sdram using dma. For some reason some of the data dosent transfered... Are there any suggestions what to look for to solve this problem? Thanks. A...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I'm not sure if I follow. If you mean that you think cache isn't a problem because you see the DMA addressing incrementing then that's not what we are talking about. We are talking about the data that you are accessing before and after the transfer. If you do not take care of cache coherency of the data then the DMA may not transfer the data you populated in the memory (because it may still be allocated in the cache).