Writes a specified number of bytes to an output port. RtWritePortXxx functions include:

• RtWritePortXxx writes 1, 2, or 4 bytes from an output port.
• RtWritePortBufferXxx writes a number of 1-byte, 2-byte, or 4-byte units specified in nNumberOfBytes to one output port.

Each function includes variants for Uchar, Ushort, and Ulong.

VOID RtWritePortBufferUchar(
    PUCHAR PortAddress,
    PUCHAR pBuffer,
    ULONG nNumberOfBytes
);

VOID RtWritePortBufferUshort(
    PUSHORT PortAddress,
    PUSHORT pBuffer,
    ULONG nNumberOfBytes
);

VOID RtWritePortBufferUlong(
    PULONG PortAddress,
    PULONG pBuffer,
    ULONG nNumberOfBytes
);

VOID RtWritePortUchar(
    PUCHAR PortAddress,
    UCHAR pBuffer
);

VOID RtWritePortUshort(
    PUSHORT PortAddress,
    USHORT pBuffer
);

VOID RtWritePortUlong(
    PULONG PortAddress,
    ULONG pBuffer
);

Parameters

PortAddress

Output port address, cast as a pointer to the type of data being written.

pBuffer

(Pointer to) a buffer that contains data to write to the port.

nNumberOfBytes

Size, in bytes, of pBuffer.

Requirements

Note

These functions operate in the real-time portion of your application.

See Also

iwin32 API, iwin32 Overview