MDD_SDSPI_SectorWrite Function

MDD File System Interface Library

MDDFS Interface Library Help

BYTE MDD_SDSPI_SectorWrite(
    DWORD sector_addr, 
    BYTE* buffer, 
    BYTE allowWriteToZero
);

Description

The MDD_SDSPI_SectorWrite function writes one sector of data (512 bytes) of data from the location pointed to by 'buffer' to the specified sector of the SD card.

Preconditions

The MDD_SectorWrite function pointer must be pointing to this function.

Parameters

Parameters	Description
sector_addr	The address of the sector on the card.
buffer	The buffer with the data to write.
allowWriteToZero	TRUE - Writes to the 0 sector (MBR) are allowed FALSE - Any write to the 0 sector will fail.

Return Values

Return Values	Description
TRUE	The sector was written successfully.
FALSE	The sector could not be written.

Side Effects

None.

Remarks

The card expects the address field in the command packet to be a byte address. The sector_addr value is ocnverted to a byte address by shifting it left nine times (multiplying by 512).

APIs > SD-SPI Physical Layer > Functions > MDD_SDSPI_SectorWrite Function

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