URGENT: Peripheral to Memory DMA Transaction

currently, this is 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"

//#include "sys/alt_timestamp.h"

int main()

{

int i;

unsigned int dst = SDRAM_BASE + 0x200000;

for(i=0; i<128; i++)

{

IOWR_32DIRECT(PERIPHERAL_0_BASE, 0, i);

//printf("%d\n", IORD_32DIRECT(PERIPHERAL_0_BASE, 0));

}

IOWR_ALTERA_AVALON_DMA_STATUS(DMA_BASE, 0x00);

printf("%d\n", IORD_ALTERA_AVALON_DMA_STATUS(DMA_BASE));

IOWR_32DIRECT(PERIPHERAL_0_BASE, 0, i);

IOWR_ALTERA_AVALON_DMA_RADDRESS(DMA_BASE, PERIPHERAL_0_BASE);

IOWR_ALTERA_AVALON_DMA_WADDRESS(DMA_BASE,dst);

IOWR_ALTERA_AVALON_DMA_LENGTH(DMA_BASE,100);

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE,0x19C);

usleep(200000);

for(i=0; i<128; i++)

{

printf("%d\n", IORD_32DIRECT(dst, i));

}

return 0;

}

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i dont know if the arrangement of my code is correct.

update: i just manage to get the result for this: printf("%d\n", IORD_ALTERA_AVALON_DMA_STATUS(DMA_BASE)); which is 0