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Altera_Forum's avatar
Altera_Forum
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13 years ago

How could I use DMA IPcore to transfer data continuous

Hi Everyone:

When I use the dma ipcore to transfer data,I found a question"How could I use DMA IPcore to transfer data continuous",for example,when one dma transfer finished,how to trige another dma transfer immediantly,so I can transfer capture data to ram continuous. thinks a lot!!

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

    It is the driver that initiates the DMA transfer. So when the driver at the Host PC end initiates the DMA transfer by programming the registers of the device, it would poll or look for interrupts/MSI for the completion of the DMA. Once the driver gets the notification from the FPGA about the completion, the driver can re-initiate the DMA transfer.