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Altera_Forum
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15 years ago

Simple DMA Avalon-to-PCIe Address Translation help needed

See attached SOPC recipe that I am using. I am using Simple DMA, and I am programming the registers directly to initiate a DMA transaction inside a Windows Driver. My Windows Driver is usi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I've figured out what I was doing wrong.

Inside the Interrupt event handler (EvtInterruptIsr) I was looking at the memory after checking that the Done bit in the Status register was set, which seemed reasonable.

However, due to WDF using bounce buffers (to ensure a continuous buffer), I should have checked the memory after a WdfDmaTransactionRelease, as that's when the transfer buffers are copied to the destination memory.