1.1.3.4.24 DRV_MEMORY_Read Function

C

void DRV_MEMORY_Read
(
    const DRV_HANDLE handle,
    SYS_MEDIA_BLOCK_COMMAND_HANDLE* commandHandle,
    void* sourceBuffer,
    uint32_t blockStart,
    uint32_t nBlock
)

Summary

Interface to the file system to perform a read operation in Synchronous mode.

Description

This routine provides interface to the file system to perform a media read operation in Synchronous mode of the Memory driver.

Precondition

The DRV_MEMORY_Open must have been called to obtain a valid opened device handle.

Parameters

ParametersDescription
handleA valid open-instance handle, returned from the driver's open function
commandHandlePointer to an argument that will contain the return buffer handle
sourceBufferThe source buffer containing data to be programmed to the SD card
blockStartStart block address of SD card where the writes should begin
nBlockTotal number of blocks to be written

Returns

The buffer handle is returned in the commandHandle argument. It will be DRV_MEMORY_COMMAND_HANDLE_INVALID if the request was not successful.

Remarks

This function is internally used by the file system and should not be used by application.