2.105 SD/MMC Host Controller (SDHC)
This Plib implements software abstraction for SDHC Peripheral.
Library Interface
SDHC peripheral library provides the following interfaces:
Functions
| Name | Description |
|---|---|
| SDHCx_BusWidthSet | Configures the width of the data bus |
| SDHCx_SpeedModeSet | Sets the bus speed |
| SDHCx_BlockSizeSet | Sets the size of the one data block of transfer |
| SDHCx_BlockCountSet | Sets the number of blocks to transfer |
| SDHCx_IsCmdLineBusy | Returns the status of the command line |
| SDHCx_IsDatLineBusy | Returns the status of the data line |
| SDHCx_IsWriteProtected | Returns the write protect switch pin level |
| SDHCx_IsCardAttached | Indicates if the card is attached or detached |
| SDHCx_ClockSet | Sets the SDHC clock frequency |
| SDHCx_ClockEnable | Enable SDHC clock |
| SDHCx_ClockDisable | Disable SDHC clock |
| SDHCx_CommandErrorGet | Returns the errors associated with a command transfer |
| SDHCx_DataErrorGet | Returns the errors associated with a data transfer |
| SDHCx_ErrorReset | Resets errors as specified by the resetType |
| SDHCx_ResponseRead | Reads the response to a given command |
| SDHCx_ModuleInit | Initializes the SDHC peripheral |
| SDHCx_Initialize | Initializes the SDHC peripheral and the internal data structures used by the peripheral library |
| SDHCx_CallbackRegister | This function allows a SDHC PLIB client to set an event handler |
| SDHCx_CommandSend | This function allows the client to send a SD command on the SDHC interface |
| SDHCx_DmaSetup | Sets up the DMA for data transfers |
| SDHC_CardDetectEnable | Enables the use of SD Card Detect Pin |
| SDHC_CardDetectDisable | Disables the use of SD Card Detect Pin |
| SDHC_WriteProtectEnable | Enables the use of SD Card Write Protect Pin |
| SDHC_WriteProtectDisable | Disables the use of SD Card Write Protect Pin |
Data types and constants
| Name | Type | Description |
|---|---|---|
| SDHC_BUS_WIDTH | Enum | The enumeration lists the bus widths for the SDHC bus |
| SDHC_SPEED_MODE | Enum | The enumeration lists the bus widths for the SDHC bus |
| SDHC_CMD_RESP_TYPE | Enum | The enumeration lists the supported response types |
| SDHC_READ_RESPONSE_REG | Enum | The enumeration lists the response registers that can be read for a given command |
| SDHC_RESET_TYPE | Enum | The enumeration lists error type to reset |
| SDHC_CLK_MODE | Enum | The enumeration lists the clock modes |
| SDHC_XFER_STATUS | Enum | The enumeration lists the status of the transfer |
| SDHC_DATA_TRANSFER_TYPE | Enum | The enumeration lists single or multi block data transfer type |
| SDHC_DATA_TRANSFER_DIR | Enum | The enumeration lists the direction of the data transfer |
| SDHC_DataTransferFlags | Struct | The data structure is used by the client to provide information about the data transfer to the SDHC PLIB |
| SDHC_CALLBACK | Typedef | The prototype of the SDHC callback function |
Note: Not all APIs maybe implemented. See the specific device family
section for available APIs.