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Altera_Forum's avatar
Altera_Forum
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12 years ago

Stream to Memory sgdma transfers

I am trying to do a stream-to-memory sgdma transfer using the start of packet and end of packet signals. My question is how do I set up the descriptors for this type of transfer? Do I ne...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

No AFAIK the SGDMA core completely ignores the start of packet. It will just ready any stream data you give it, until it sees an end of packet.

You can start a transfer with do_async_transfer even if there is no packet yet on the stream. In that case the SGDMA core will just wait, and start transferring data when the packet arrives.