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Altera_Forum
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18 years ago

Avalon-ST backpressure with SGDMA

Hi, I have a custom SOPC component with multiple Avalon streaming ports supporting backpressure, using a ready latency of 0. For testing, I've connected a sink port up to an Altera SGDMA compo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

I see what you mean about the resemblance to non-zero readyLatency. While the SGDMA documentation does not specify readyLatency, my local FAE indicated it was zero. And indeed, if I specify my custom component with a readyLatency of 1, SOPC Builder gives an error. For now, I've modified my component to act as though it has a non-zero readyLatency (by asserting ready before valid), but I specify 0 in component editor.

What issues did the 7.2 SGMDA component have? The knowledgebase doesn't seem to document any.

Paul