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BUILD_IO_RW_DIRECT_ARG (Windows CE 5.0)

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This macro builds a 32-bit argument for a direct I/O operation.

DWORD BUILD_IO_RW_DIRECT_ARG(RWFlag,
  RAW,
  Function,
  Address,
  Data);

Parameters

  • RWFlag
    [in] Set to SD_IO_OP_WRITE or SD_IO_OP_READ.
  • RAW
    [in] Set to SD_IO_RW_NORMAL or SD_IO_RW_RAW.
  • Function
    [in] 3-bit function number.
  • Address
    [in] 17-bit register address.
  • Data
    [in] 8-bit write data. Should be zero for a read operation.

Return Values

Returns a 32-bit argument for a Direct I/O operation.

Remarks

The SDReadWriteRegistersDirect function provides a more convenient method for performing direct I/O reads and writes.

Requirements

OS Versions: Windows CE 5.0 and later.
Header: Sdcard.h.

See Also

Secure Digital Card Driver Macros | SDReadWriteRegistersDirect

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