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Altera_Forum's avatar
Altera_Forum
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14 years ago

ADC to DDR2 using Avalon-ST

I've been searching the forums for a few examples on how to stream ADC data to DDR2 for awhile now and finally think i've built a system that correctly does this. Im just looking for some validation ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

You should read the datasheet of sgdma core first. No, there's no full signal as You can transfer only up to 65.5kb of data per descriptor, so You can do the math how many descriptors You'll need to fill the memory. Also remember, that 125MHz Nios system won't be able to work with all the data, as some of Your commands will take more than one cpu instruction.