DMA transfer from SDRAM to PIO

To simplify life, I wouldn&#39;t use any eCos DMA stuff; I&#39;d talk right to the DMA hardware with IORD/IOWR (in <cyg/hal/io.h>). Read the Altera documentation on the DMA peripheral and its registers. Starting the DMA should amount to four IOWR()s; one each to set source and destination addresses and word count, and another to set the transfer-type flags and start the DMA.