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It is possible that it is also a printf issue, but in general it is timing issue.
Because when I program DMA to retrieve data from sdram then readed data was crap.
However, DMA write to sdram is ok.
(I used DMA in word transfer mode.)
Alexander.
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In that case, printf() is one of the two contributors to this error. printf() should not be used for printing data from the memories etc. You can use file read/write for this purpose. "Altera Host-Based File System" is a good utility for this purpose.
That said, the cause of your current error appears to stem up from incorrect specification of Read/Write cycles of the memory. I conclude this as you wrote DMA write to SDRAM is fine (though I would like to know how did you ascertain this). Try varying the cycles and reading the memory then.
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