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Altera_Forum's avatar
Altera_Forum
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14 years ago

problem about PCIe DMA chain reference design

About PCIe DMA chain reference design, can set DMA read and write register in the same time? It means let DMA to do read and write operations at the same time. I use PCIe Gen1 x1 channel on cyclone IV GX.

Thanks

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    I assume you meant to say, chaining dma design.

    The chaining DMA or the AN345 design, does have read/write at same time.

    The pull down menu should say,

    read, write, read then write, write then read, read and write.

    You just need to select read and write, so the transaction happens both direction at same time as you are looking for.