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Altera_Forum's avatar
Altera_Forum
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12 years ago

Stream to Memory sgdma problem

I am having two problems with the sg-dma in my system. My first issue is that the sg-dma ready signal goes low after the first element of streaming data, then returns high on the third. This causes...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

My suggestion would be to try to capture the event on SignalTap in order to gain better understanding of where the issue is.

Tap signals on:

- SDRAM slave port

- SGDMA master port

- SGDMA Avalon-ST sink (from ADC)

and figure out at which stage the 00's are getting introduced.

If 00's are never on the Avalon-ST and is reliably there on the SGDMA Avalon-MM Master port, then yes it sounds like a bug in the SGDMA and you would need to dig inside it a bit further.