/*******************************************************************************
* Function Name : MAL_Read
* Description : Read sectors
* Input : None
* Output : None
* Return : Buffer pointer
*******************************************************************************/
uint16_t MAL_Read(uint8_t lun, uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length)
{
switch (lun)
{
case 0:
#ifdef USE_STM3210E_EVAL
Status = SD_ReadBlock(Memory_Offset, Readbuff, Transfer_Length);
if ( Status != SD_OK )
{
return MAL_FAIL;
}
#else
MSD_ReadBlock((uint8_t*)Readbuff, Memory_Offset, Transfer_Length);
#endif
break;
#ifdef USE_FSMC_NAND
case 1:
NAND_Read(Memory_Offset, Readbuff, Transfer_Length);
break;
#endif
default:
return MAL_FAIL;
}
return MAL_OK;
}
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the microSD card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void Read_Memory(void)
{
if (!Block_Read_count)
{
MSD_ReadBlock(Data_Buffer, Memory_Offset, 512);
UserToPMABufferCopy(Data_Buffer, ENDP1_TXADDR, BULK_MAX_PACKET_SIZE);
Block_Read_count = 512 - BULK_MAX_PACKET_SIZE;
Block_offset = BULK_MAX_PACKET_SIZE;
}
else
{
UserToPMABufferCopy(Data_Buffer + Block_offset, ENDP1_TXADDR, BULK_MAX_PACKET_SIZE);
Block_Read_count -= BULK_MAX_PACKET_SIZE;
Block_offset += BULK_MAX_PACKET_SIZE;
}
SetEPTxCount(ENDP1, BULK_MAX_PACKET_SIZE);
SetEPTxStatus(ENDP1, EP_TX_VALID);
Memory_Offset += BULK_MAX_PACKET_SIZE;
Transfer_Length -= BULK_MAX_PACKET_SIZE;
CSW.dDataResidue -= BULK_MAX_PACKET_SIZE;
if (Transfer_Length == 0)
{
Block_Read_count = 0;
Block_offset = 0;
Memory_Offset = 0;
Bot_State = BOT_DATA_IN_LAST;
}
}
