?? sdcard.c
字號:
if (NULL == readbuff)
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
TransferError = SD_OK;
TransferEnd = 0;
TotalNumberOfBytes = 0;
/* Clear all DPSM configuration */
SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DataLength = 0;
SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
SDIO_DataConfig(&SDIO_DataInitStructure);
SDIO_DMACmd(DISABLE);
if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
{
errorstatus = SD_LOCK_UNLOCK_FAILED;
return(errorstatus);
}
if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
{
power = convert_from_bytes_to_power_of_two(BlockSize);
/* Set Block Size for Card */
SDIO_CmdInitStructure.SDIO_Argument = (u32) BlockSize;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);
if (SD_OK != errorstatus)
{
return(errorstatus);
}
}
else
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
SDIO_DataInitStructure.SDIO_DataBlockSize = (u32) power << 4;
SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
SDIO_DataConfig(&SDIO_DataInitStructure);
TotalNumberOfBytes = BlockSize;
StopCondition = 0;
DestBuffer = readbuff;
/* Send CMD17 READ_SINGLE_BLOCK */
SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_READ_SINGLE_BLOCK;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_READ_SINGLE_BLOCK);
if (errorstatus != SD_OK)
{
return(errorstatus);
}
/* In case of single block transfer, no need of stop transfer at all.*/
if (DeviceMode == SD_POLLING_MODE)
{
/* Polling mode */
while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
{
if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
{
for (count = 0; count < 8; count++)
{
*(tempbuff + count) = SDIO_ReadData();
}
tempbuff += 8;
}
}
if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
errorstatus = SD_DATA_TIMEOUT;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
errorstatus = SD_DATA_CRC_FAIL;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
errorstatus = SD_RX_OVERRUN;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);
errorstatus = SD_START_BIT_ERR;
return(errorstatus);
}
while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
{
*tempbuff = SDIO_ReadData();
tempbuff++;
}
/* Clear all the static flags */
SDIO_ClearFlag(SDIO_STATIC_FLAGS);
}
else if (DeviceMode == SD_INTERRUPT_MODE)
{
SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
while ((TransferEnd == 0) && (TransferError == SD_OK))
{}
if (TransferError != SD_OK)
{
return(TransferError);
}
}
else if (DeviceMode == SD_DMA_MODE)
{
SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
SDIO_DMACmd(ENABLE);
DMA_RxConfiguration(readbuff, BlockSize);
while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
{}
}
return(errorstatus);
}
/*******************************************************************************
* Function Name : SD_ReadMultiBlocks
* Description : Allows to read blocks from a specified address in a card.
* Input : - addr: Address from where data are to be read.
* - readbuff: pointer to the buffer that will contain the
* received data.
* - BlockSize: the SD card Data block size.
* - NumberOfBlocks: number of blocks to be read.
* Output : None
* Return : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_ReadMultiBlocks(u32 addr, u32 *readbuff, u16 BlockSize, u32 NumberOfBlocks)
{
SD_Error errorstatus = SD_OK;
u32 count = 0, *tempbuff = readbuff;
u8 power = 0;
if (NULL == readbuff)
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
TransferError = SD_OK;
TransferEnd = 0;
TotalNumberOfBytes = 0;
/* Clear all DPSM configuration */
SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DataLength = 0;
SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
SDIO_DataConfig(&SDIO_DataInitStructure);
SDIO_DMACmd(DISABLE);
if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
{
errorstatus = SD_LOCK_UNLOCK_FAILED;
return(errorstatus);
}
if ((BlockSize > 0) && (BlockSize <= 2048) && (0 == (BlockSize & (BlockSize - 1))))
{
power = convert_from_bytes_to_power_of_two(BlockSize);
/* Set Block Size for Card */
SDIO_CmdInitStructure.SDIO_Argument = (u32) BlockSize;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);
if (SD_OK != errorstatus)
{
return(errorstatus);
}
}
else
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
if (NumberOfBlocks > 1)
{
/* Common to all modes */
if (NumberOfBlocks * BlockSize > SD_MAX_DATA_LENGTH)
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
TotalNumberOfBytes = NumberOfBlocks * BlockSize;
StopCondition = 1;
DestBuffer = readbuff;
SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
SDIO_DataInitStructure.SDIO_DataBlockSize = (u32) power << 4;
SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
SDIO_DataConfig(&SDIO_DataInitStructure);
/* Send CMD18 READ_MULT_BLOCK with argument data address */
SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_READ_MULT_BLOCK;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_READ_MULT_BLOCK);
if (errorstatus != SD_OK)
{
return(errorstatus);
}
if (DeviceMode == SD_POLLING_MODE)
{
/* Polling mode */
while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DATAEND | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
{
if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
{
for (count = 0; count < SD_HALFFIFO; count++)
{
*(tempbuff + count) = SDIO_ReadData();
}
tempbuff += SD_HALFFIFO;
}
}
if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
errorstatus = SD_DATA_TIMEOUT;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
errorstatus = SD_DATA_CRC_FAIL;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
errorstatus = SD_RX_OVERRUN;
return(errorstatus);
}
else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);
errorstatus = SD_START_BIT_ERR;
return(errorstatus);
}
while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
{
*tempbuff = SDIO_ReadData();
tempbuff++;
}
if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET)
{
/* In Case Of SD-CARD Send Command STOP_TRANSMISSION */
if ((SDIO_SECURE_DIGITAL_CARD == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
{
/* Send CMD12 STOP_TRANSMISSION */
SDIO_CmdInitStructure.SDIO_Argument = 0x0;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_STOP_TRANSMISSION;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_STOP_TRANSMISSION);
if (errorstatus != SD_OK)
{
return(errorstatus);
}
}
}
/* Clear all the static flags */
SDIO_ClearFlag(SDIO_STATIC_FLAGS);
}
else if (DeviceMode == SD_INTERRUPT_MODE)
{
SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
while ((TransferEnd == 0) && (TransferError == SD_OK))
{}
if (TransferError != SD_OK)
{
return(TransferError);
}
}
else if (DeviceMode == SD_DMA_MODE)
{
SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
SDIO_DMACmd(ENABLE);
DMA_RxConfiguration(readbuff, (NumberOfBlocks * BlockSize));
while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
{}
while ((TransferEnd == 0) && (TransferError == SD_OK))
{}
if (TransferError != SD_OK)
{
return(TransferError);
}
}
}
return(errorstatus);
}
/*******************************************************************************
* Function Name : SD_WriteBlock
* Description : Allows to write one block starting from a specified address
* in a card.
* Input : - addr: Address from where data are to be read.
* - writebuff: pointer to the buffer that contain the data to be
* transferred.
* - BlockSize: the SD card Data block size.
* Output : None
* Return : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_WriteBlock(u32 addr, u32 *writebuff, u16 BlockSize)
{
SD_Error errorstatus = SD_OK;
u8 power = 0, cardstate = 0;
u32 timeout = 0, bytestransferred = 0;
u32 cardstatus = 0, count = 0, restwords = 0;
u32 *tempbuff = writebuff;
if (writebuff == NULL)
{
errorstatus = SD_INVALID_PARAMETER;
return(errorstatus);
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -