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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

I build some simple Stream to Memory in 3Mhz then forward to Stream out in 150Mhz, continuously... (DC-FIFO -> SGDMA -> Memory -> SGDMA)

But, I do some debug with "printf" command and became stuck (looks in Nios Console).

When I change debug into PIO to drive LEDs, it was runs...

I assumed, "printf" tho show debug process in Nios console can't follow interrupt request from SGDMA (in high speed interrupt)