URGENT: Peripheral to Memory DMA Transaction

I think now my DMA is working... But it seems like it cannot write into the memory.. my code:

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#include "io.h"# include <stdio.h># include <unistd.h># include <sys/alt_dma.h># include "altera_avalon_dma_regs.h"# include "altera_avalon_pio_regs.h"# include "alt_types.h"# include "system.h"

int main()

{

int i;

for(i=0; i<100; i++)

{

IOWR(PERIPHERAL_0_BASE, 0, i);

}

IOWR_ALTERA_AVALON_DMA_STATUS(DMA_BASE, 0x00);

IOWR_ALTERA_AVALON_DMA_RADDRESS(DMA_BASE, PERIPHERAL_0_BASE);

IOWR_ALTERA_AVALON_DMA_WADDRESS(DMA_BASE, EXT_SRAM_BASE);

IOWR_ALTERA_AVALON_DMA_LENGTH(DMA_BASE, 200);

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE, 0x1102);

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE, 0x10A);

printf("done\n");

for(i=0; i<100; i++)

{

printf("%d\n", IORD(EXT_SRAM_BASE, i));

}

return 0;

}

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i disable the interrupt and add in the softreset initially...

update: result is:

done

0

-1

-1

-1

-1 then all are -1....