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Altera_Forum's avatar
Altera_Forum
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16 years ago

dma usage

I'm using alt_dma_txchan_send () to send data over a DMA channel, unfortunately it fails. I didn't find any error code explanation for this function. The only thing I know is that when it fails a neg...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Can you post your code so that we can see how you are using the driver. As a heads up when you pass flags into the transmit/receive calls only send one flag at a time. For example if you try to enable stop of length and set the transfer width at the same time only one flag will stick. Instead you need to call the function twice sending each flag in individually.