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Altera_Forum
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12 years ago

mSGDMA ST->MM fills FIFO immediately

Hi, I would like to use mSGDMA in my application but it behaves differently from what I would expect. Currently, I have a Avalon ST source module connected to mSGDMA write master, controlled by...
Altera_Forum's avatar
Altera_Forum
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11 years ago

Hi,

I think you misunderstood me, FIFO in my case gets emptied, but only after I write descriptors (that is a desired behaviour, since DMA should at least know where to write data to). My problem was that FIFO got filled up immediately. I resolved (covered up :)) this problem at driver level, by not reading that part of memory.