Dera Sir:
I want to use EDMA to deal with MMCSD read and write operation.
However, when I set DMA size and issue a read command to SD card, I can not get the correct result.
Below is my code, please advise me where I male a mistake.
#define OPT_BIT_A_SYNC 0x0 // A-synchronized
#define OPT_BIT_TCINTEN 0x00100000 // Transfer complete interrupt enable.
#define OPT_TCC_SFT_BIT 12 // The TCC(Transfer complete code) is at the bit 12-17 of OPT.
#define EDMA_CH_MMCSD_RECEIVE 26
OPT | SRC |ACNT | BCNT | DST |SRCBIDX | DSTBIDX | LINK | BCNTRLD | SRCC IDX | DSTCIDX | CCNT | RSV
{OPT_MMCSD_RECEIVE , 0 , 4 , 8 , 0 , 0 , 4 , 0xFFFF , 0 , 0 , 0 , 1 , 0 } //Parameter Set
#define OPT_MMCSD_RECEIVE OPT_BIT_A_SYNC | OPT_BIT_TCINTEN | (EDMA_CH_MMCSD_RECEIVE << OPT_TCC_SFT_BIT)
Uint8 EDMA_temp[4][8];
/* reset the FIFO */
MMCSD_MMCFIFOCTL |= 1;
t_waitusec(10);
/* Set the Transfer direction from the FIFO as receive*/
MMCSD_MMCFIFOCTL &= 0xFFFD;
PaRAM_list[PARAMLIST_MMCSD_R1].SRC = (UINT32)(&MMC_MMCDRR);
PaRAM_list[PARAMLIST_MMCSD_R1].DST = (UINT32)EDMA_temp[0];
EDMA365_resetPaRAM_mmcsdReceive(); //Setup Parametr set
if ( MMCSD_sendCmd( 0x12000 | MMCSD_READ_SINGLE_BLOCK, 128000, 0, MMCSD_STAT0_RSPDNE ) )
return E_FAIL;
BTW, I compile the code on CCS 3.3 and when I run the code, only first 4 bytes are correct.
Please help me.
Best regards,
yuenjune
