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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
12 years ago

The solution to the ready signal going low after the first piece of data was to put the sgdma in burst mode.

The solution to the second problem was to build the descriptors again.

My new problem is that the descriptors are not built in a timely fashion for my system. I would like to use the PARK option in the control register map, so I can re-use the descriptor without rebuilding it. I have not had any success programming this configuration. Does anyone have some CODE that can show a working system that re-uses the descriptors?

Thank you in advance for your help!