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Altera_Forum
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15 years ago

DMA problem on alt_dma_txchan_send

Hi every body. I have a problem with the NIOS DMA setting. In my system, I need to read data from a device by a MM-Avalon interface, and write the data in a other device with the MM-Avalon inter...
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Altera_Forum
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14 years ago

I had the same issue.

In my case I had accidentally kept the width of DMA length register as 4 bits, resulting in the -22 error you described. To solve this, I adjusted the width of the DMA length register to 13 bits (default setting). This is good enough for most transfers.