SD Exported Functions

group SD_Exported_Functions

Functions

SdEmmcRes_t SdEmmc_Init(SDHC_TypeDef *SDHCx, const SdEmmcInitParm_t *pParm)

SDCard or EMMC init flow.

Parameters:

  • SDHCx – [in] Specifies the SDHC peripheral.

  • pParm – [in] Specifies the parameters for CardType, DataWidth, ClkOutFreq_kHz. Please refer to SD/EMMC Init Parameters for more details.

Returns:

Please refer to SD/EMMC Return Value for more details.

SdEmmcRes_t SdEmmc_Read(SDHC_TypeDef *SDHCx, uint32_t StartBlock, uint32_t BlockCnt, void *pBuf)

SDCard or EMMC read data.

Parameters:

  • SDHCx – [in] Specifies the SDHC peripheral.

  • StartBlock – [in] Start block.

  • BlockCnt – [in] Block count.

  • pBuf – [out] Pointer to a read buffer.

Returns:

Please refer to SD/EMMC Return Value for more details.

SdEmmcRes_t SdEmmc_Write(SDHC_TypeDef *SDHCx, uint32_t StartBlock, uint32_t BlockCnt, const void *pBuf)

SDCard or EMMC write data.

Parameters:

  • SDHCx – [in] Specifies the SDHC peripheral.

  • StartBlock – [in] Start block.

  • BlockCnt – [in] Block count.

  • pBuf – [in] Pointer to a write buffer.

Returns:

Please refer to SD/EMMC Return Value for more details.

uint32_t SdEmmc_GetBlockCnt(SDHC_TypeDef *SDHCx)

SDCard or EMMC get block count.

Parameters:

SDHCx – [in] Specifies the SDHC peripheral.

Returns:

Block count for transfer.