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Altera_Forum's avatar
Altera_Forum
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13 years ago

Modular SGDMA seems to not read properly

I am having an issue with the Modular SGDMA IP. I am using it to feed my video pipeline with data by using a memory mapped to streaming configuration. I have configured it to read the data from my SD...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Could it be a data cache problem? When you write to the SDRAM you should flush the data cache before starting the DMA. If you don't flush the cache the SDRAM could still have the old values and not the new ones you wrote. Alternatively you can also use uncached access to the SDRAM.