NiosII DMA Tutorial

Hi,

I saw you opened a thread on this topic yesterday, but I had no certain solution, so I didn't answer. The only thing I can think about it is timing problems; is your design fully constrained and does it meet timing?

Have you also checked interrupt or arbitration priorities; is it possible you have a highest priority interrupt which is blocking everything?

I'd run in debug mode and step into alt_dma_rxchan_open to see the exact point where code hangs.