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Altera_Forum
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16 years ago

DMA burst data transfer

Hi I am working on DMA of Nios II , In SOPC builder i have set burst size of DMA as 128 words so i should be able to transfer 128 words or (128*4=512) bytes In Nios IDE i see i am ab...
Altera_Forum's avatar
Altera_Forum
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16 years ago

You have run into a known issue with the DMA core. There is a bug that prevents it from sending more data than the maximum burst length is set to. To work around this issue you can increase the maximum burst length of the DMA core. What kind of slave ports are you accessing that requires a max burst count of 128 beats? It could be that you don't even need bursting enabled.

I recommend reading this to determine if you really need to be using bursting or not: http://www.altera.com/literature/hb/nios2/edh_ed51007.pdf