Honored Contributor
Honored ContributorThank you for the example code. I've been doing something similar using an Arria GX device and I have a couple of questions. First, I was quite unable to make the DMA controller work with memory without adding several pipeline delays in between the memory and the DMA component. I read about this fix in Altera's knowledge base. However, I notice that the Stratix reference design doesn't seem to need the pipeline delays and I wondered why.
My second question is about the PC software side. I'm trying to set up a DMA such that data are copied from my Arria memory and into the PC's memory. Using Jungo's driver software I can get kernel-mode physical memory pointers and I can set up a DMA transaction within the DMA controller which completes OK but nothing turns up in the PC's memory. Presumably the example program PCIe.exe must do all this but Altera won't release the source code so I can't figure out what I'm doing wrong. Any help greatly appreciated. Kind regards
