Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

problem of DMA(Momery to memory)

#include"system.h"# include<stdio.h># include"altera_avalon_dma_regs.h"# include"altera_avalon_pio_regs.h"# include"alt_types.h" alt_u8 tab[8]={'a','b','c','d','e','f','g','h'},des[8]; alt_u32 f...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

After reading your control register, I saw that you enabled the WCON bit. You shouldn't enable it, the DMA musn't always write to the same address. Try this: 

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE,0X89);

If it stills doesn't work, you should put a signaltap probe and see what the controller is doing.