DMA

this is my c program

volatile alt_u16 crcCompute(void)

{

alt_u16 word;

int value;

int pat[4]={0x00000003,0x00000004,0x00000005,0x00000006};

//alt_u8 pat[8]={0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x04};

int mode;

//pat[0]=0x00000003;

printf("start crc\n");

IOWR(CRC_PERIPH_BASE,0,0x0000FFFF);

//value=IORD(CRC_PERIPH_BASE,0);

//printf("value= %x\n",value);

// value=IORD(CRC_PERIPH_BASE,1);

//printf("value= %x\n",value);

/*IOWR(SLAVE_REG_0_BASE,0,0x0000F0F0);

alt_dma_txchan_ioctl(tx,

ALT_DMA_TX_ONLY_ON,

(void*)(CRC_PERIPH_BASE+0x4 ));

alt_avalon_dma_send (tx,

(int)pat,

16 ,

//dma_done,

NULL,

NULL);*/

IOWR_ALTERA_AVALON_DMA_STATUS(AVALON_DMA_BASE, 0);

IOWR_ALTERA_AVALON_DMA_CONTROL(AVALON_DMA_BASE,0);

IOWR_ALTERA_AVALON_DMA_RADDRESS(AVALON_DMA_BASE, (int)pat);

IOWR_ALTERA_AVALON_DMA_WADDRESS(AVALON_DMA_BASE, (CRC_PERIPH_BASE+0x4));

IOWR_ALTERA_AVALON_DMA_LENGTH(AVALON_DMA_BASE, 4);

mode =

ALTERA_AVALON_DMA_CONTROL_WORD_MSK |

ALTERA_AVALON_DMA_CONTROL_GO_MSK |

ALTERA_AVALON_DMA_CONTROL_LEEN_MSK |

ALTERA_AVALON_DMA_CONTROL_WCON_MSK ;

IOWR_ALTERA_AVALON_DMA_CONTROL(AVALON_DMA_BASE,mode);

value=IORD(CRC_PERIPH_BASE,0);

printf("value= %x\n",value);

value=IORD(CRC_PERIPH_BASE,1);

printf("value= %x\n",value);

while (IORD_ALTERA_AVALON_DMA_STATUS (AVALON_DMA_BASE) &

ALTERA_AVALON_DMA_STATUS_BUSY_MSK);

printf("waiting crc\n");

word = (IORD((CRC_PERIPH_BASE),1));

printf("crc value0=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x1),1));

printf("crc value1=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x2),1));

printf("crc value2=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x3),0));

printf("crc value3=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x0),0));

printf("crc value4=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x1),0));

printf("crc value5=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x2),0));

printf("crc value6=%x\n",word);

word = (IORD((CRC_PERIPH_BASE+0x3),0));

printf("crc value7=%x\n",word);

word = (IORD((CRC_PERIPH_BASE),0));

printf("crc value00=%x\n",word);

return (word);

} /* crcCompute() */