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Altera_Forum
Honored Contributor
16 years agoSOPC DMA in burst mode
I tried DMA (using the SOPC DMA) between two 64-bit SOPC memories. This works in 64-bit burst mode, but not when I use 32-bit DMA. I thought the burst adapters would solve this and translate the burs...
Altera_Forum
Honored Contributor
16 years agoHello,
thanks for the fast reply. In the example shown I limit myself to a DMA controller and two 64-bit memories which I control via a self-made Avalon master (not burst capable, does that matter ?). The DMA controller actually does not even finish correctly (busy bit stays on), when I execute a word transfer (in burst mode). I wonder if it is possible to let the DMA controller fetch data in 32-bit burst word mode over the PCIe bus or do I always have to use 64-bit boundaries. In not burst mode 32-bit transfers work, but then every transfer is a PCIe packet which degrades performance ... (I'll post this question in a seperate thread) Kind Regards, Jon