?? sdcmd.c
字號:
INT8U SD_ReadSingleBlock(INT32U blockaddr)
{
return (SD_BlockCommand(CMD17, CMD17_R, blockaddr)); /* 讀單塊命令 command that read single block */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_ReadMultipleBlock() Name: INT8U SD_ReadMultipleBlock()
** 功能描述: 讀多塊命令 Function: read multiple block command
** 輸 入: INT32U blockaddr: 塊地址 Input: INT32U blockaddr: block address
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_ReadMultipleBlock(INT32U blockaddr)
{
return (SD_BlockCommand(CMD18, CMD18_R, blockaddr)); /* 讀多塊命令 command that read multiple block */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_WriteSingleBlock() Name: INT8U SD_WriteSingleBlock()
** 功能描述: 寫單塊命令 Function: write single block command
** 輸 入: INT32U blockaddr: block address Input: INT32U blockaddr: block address
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_WriteSingleBlock(INT32U blockaddr)
{
return (SD_BlockCommand(CMD24, CMD24_R, blockaddr)); /* 寫單塊命令 command that write single block */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_WriteMultipleBlock() Name: INT8U SD_WriteMultipleBlock()
** 功能描述: 寫多塊命令 Function: write multiple block command
** 輸 入: INT32U blockaddr: 塊地址 Input: INT32U blockaddr: block address
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_WriteMultipleBlock(INT32U blockaddr)
{
return (SD_BlockCommand(CMD25, CMD25_R, blockaddr)); /* 寫多塊命令 command that write multiple block */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_ProgramCSD() Name: INT8U SD_ProgramCSD()
** 功能描述: 寫CSD寄存器 Function: write CSD register
** 輸 入: INT8U *buff : CSD寄存器內容 Input: INT8U *buff : the content of CSD register
INT8U len : CSD寄存器長度 INT8U len : the length of CSD register
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
********************************************************************************************************************/
#if SD_ProgramCSD_EN
INT8U SD_ProgramCSD(INT8U len, INT8U *buff)
{
INT8U param[4] = {0,0,0,0},resp,ret;
if (len != 16) return SD_ERR_USER_PARAM;
ret = SD_SendCmd(CMD27, param, CMD27_R, &resp); /* 發送寫CSD寄存器命令 send command that write CSD */
if (ret != SD_NO_ERR)
return ret;
if (resp != 0)
return SD_ERR_CMD_RESP;
buff[15] = (SD_GetCRC7(buff, 15) << 1) + 0x01; /* 計算CSD中的crc 位域 calculate crc field in CSD */
return(SD_WriteBlockData(0, 16, buff));
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_GetCRC7() Name: INT8U SD_GetCRC7()
** 功能描述: 計算CRC7 Function: calculate crc7
** 輸 入: INT8U *pSource: 數據 Input: INT8U *pSource: data
INT16U len : 數據長度 INT16U len : data length
** 輸 出: CRC7碼 Output: CRC7 code
*********************************************************************************************************************/
INT8U SD_GetCRC7(INT8U *pSource, INT16U len)
{
INT8U i = 0, j;
INT8U reg = 0;
do
{
for (j = 0; j < 8; j++)
{
reg <<= 1;
reg ^= ((((pSource[i] << j) ^ reg) & 0x80) ? 0x9 : 0);
}
i++;
}while(i < len);
return reg;
}
#endif
#if SD_EraseBlock_EN
/********************************************************************************************************************
** 函數名稱: INT8U SD_EraseStartBlock() Name: INT8U SD_EraseStartBlock()
** 功能描述: 設置塊擦除起始地址 Function: select the start block address of erasing operation
** 輸 入: INT32U startblock: 塊地址 Input: INT32U startblock : block address
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_EraseStartBlock(INT32U startblock)
{
return (SD_BlockCommand(CMD32, CMD32_R, startblock)); /* 發送擦除起始塊地址 send the start block address of erasing operation */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_EraseEndBlock() Name: INT8U SD_EraseEndBlock()
** 功能描述: 設置塊擦除終止地址 Function: select the end block address of erasing operation
** 輸 入: INT32U endblock: 塊地址 Input: INT32U Length : block address
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_EraseEndBlock(INT32U endblock)
{
return (SD_BlockCommand(CMD33, CMD33_R, endblock)); /* 發送擦除終止塊地址 send the end block address of erasing operation */
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_EraseSelectedBlock() Name: INT8U SD_EraseSelectedBlock()
** 功能描述: 擦除已選中的塊 Function: erase block selected
** 輸 入: 無 Input: NULL
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
INT8U SD_EraseSelectedBlock(void)
{
INT8U param[4],resp,tmp;
SD_PackParam(param, 0);
tmp = SD_SendCmd(CMD38, param, CMD38_R, &resp); /* 擦除所選擇的塊 erase blocks selected */
if (tmp != SD_NO_ERR)
return tmp;
if (SD_WaitBusy(SD_WAIT_ERASE) != SD_NO_ERR) /* 等待擦除完成 wait for finishing erasing */
return SD_ERR_TIMEOUT_ERASE;
else
return SD_NO_ERR;
}
#endif
/*********************************************************************************************************************
** 函數名稱: INT8U SD_ReadOCR() Name: INT8U SD_ReadOCR()
** 功能描述: 讀操作條件寄存器OCR Function: read OCR register of sd card
** 輸 入: INT8U ocrlen : 寄存器長度(固定為4) Input: INT8U ocrlen : len of register (fixed,is 4)
INT8U *recbuf : 接收緩沖區 INT8U *recbuf : recbuffer
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
**********************************************************************************************************************/
INT8U SD_ReadOCR(INT8U ocrlen, INT8U *recbuf)
{
INT8U param[4] = {0,0,0,0},resp[5],tmp;
tmp = SD_SendCmd(CMD58, param, CMD58_R, resp); /* 讀 OCR 寄存器命令 */
if (tmp != SD_NO_ERR) /* read OCR register command */
return tmp;
if (resp[0] != 0)
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
for (tmp = 0; tmp < 4; tmp++)
recbuf[tmp] = resp[tmp + 1]; /* 復制OCR寄存器內容到接收緩沖區 */
return SD_NO_ERR;
}
/********************************************************************************************************************
** 函數名稱: INT8U SD_EnableCRC() Name: INT8U SD_EnableCRC()
** 功能描述: 使能SD卡的CRC校驗功能 Function: enable crc check of SD Card
** 輸 入: INT8U bEnable : 1:使能 0:禁止 Input: INT8U bEnable : 1:enable 0: disable
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
#if SD_CRC_EN
INT8U SD_EnableCRC(INT8U bEnable)
{
INT8U param[4],resp,ret;
if (bEnable == 1)
param[0] = 1; /* 使能crc enable crc */
else
param[1] = 0; /* 禁止crc disalbe crc */
ret = SD_SendCmd(CMD59, param, CMD59_R, &resp); /* "使能/禁止CRC"命令 enable/disable crc command */
if (ret != SD_NO_ERR)
return ret;
if (resp != 0)
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
return SD_NO_ERR;
}
#endif
/*********************************************************************************************************************
** 函數名稱: INT8U SD_Read_SD_Status() Name: INT8U SD_Read_SD_Status()
** 功能描述: 讀SD卡的 SD_Status 寄存器 Function: read SD_Status register of sd card
** 輸 入: INT8U sdslen : 寄存器長度(固定為64) Input: INT8U sdslen: len of register (fixed,is 64)
INT8U *recbuf : 接收緩沖區 INT8U *recbuf: recbuffer
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
**********************************************************************************************************************/
#if SD_ReadSD_Status_EN
INT8U SD_ReadSD_Status(INT8U sdslen, INT8U *recbuf)
{
INT8U param[4] = {0,0,0,0},resp[2],ret;
ret = SD_SendCmd(CMD55, param, CMD55_R, resp); /* 后續命令為一個應用命令 */
if (ret != SD_NO_ERR)
return ret; /* command that the followed commnad is a specific application */
if (resp[0] != 0)
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
ret = SD_SendCmd(ACMD13, param, ACMD13_R, resp); /* 讀 SD_Status 命令 */
if (ret != SD_NO_ERR)
return ret; /* command that read SD_Status register */
if ((resp[0] != 0) || (resp[1] != 0))
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
return (SD_ReadBlockData(sdslen, recbuf)); /* 讀出寄存器內容 read the content of the register */
}
#endif
/*******************************************************************************************************************
** 函數名稱: INT8U SD_ReadSCR() Name: INT8U SD_ReadSCR()
** 功能描述: 讀SD卡的 SCR 寄存器 Function: read SCR register of sd card
** 輸 入: INT8U scrlen : 寄存器長度(固定為8) Input: INT8U scrlen : len of register (fixed,is 8)
INT8U *recbuf : 接收緩沖區 INT8U *recbuf : recbuffer
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
********************************************************************************************************************/
#if SD_ReadSCR_EN
INT8U SD_ReadSCR(INT8U scrlen, INT8U *recbuf)
{
INT8U param[4] = {0,0,0,0},resp,ret;
ret = SD_SendCmd(CMD55, param, CMD55_R, &resp); /* 后續命令為一個應用命令 */
if (ret != SD_NO_ERR) /* command that the followed commnad is a specific application */
return ret;
if (resp != 0)
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
ret = SD_SendCmd(ACMD51, param, ACMD51_R, &resp); /* 發送讀 SD_Status 命令*/
if (ret != SD_NO_ERR) /* command that read SD_Status register */
return ret;
if (resp != 0)
return SD_ERR_CMD_RESP; /* 響應錯誤 response is error */
return (SD_ReadBlockData(scrlen, recbuf)); /* 讀出寄存器內容 read the content of the register */
}
#endif
/********************************************************************************************************************
** 函數名稱: INT8U SD_GetNumWRBlcoks() Name: INT8U SD_GetNumWRBlcoks()
** 功能描述: 得到正確寫入的塊數 Function: get the block numbers that written correctly
** 輸 入: INT32U *blocknum: 返回的塊數 Input: INT32U blocknum : the block numbers returned
** 輸 出: 0: 正確 >0: 錯誤碼 Output: 0: right >0: error code
*********************************************************************************************************************/
#if SD_WriteMultiBlock_EN
INT8U SD_GetNumWRBlcoks(INT32U *blocknum)
{
?? 快捷鍵說明
復制代碼
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 + -