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WRITE_PORT_BUFFER_UCHAR routine

The WRITE_PORT_BUFFER_UCHAR routine writes a number of bytes from a buffer to the specified port.

Syntax


VOID WRITE_PORT_BUFFER_UCHAR(
  _In_  PUCHAR Port,
  _In_  PUCHAR Buffer,
  _In_  ULONG Count
);

Parameters

Port [in]

Pointer to the port, which must be a mapped memory range in I/O space.

Buffer [in]

Pointer to a buffer from which an array of UCHAR values is to be written.

Count [in]

Specifies the number of bytes to be written to the port.

Return value

None

Remarks

The size of the buffer must be large enough to contain at least the specified number of bytes.

Callers of WRITE_PORT_BUFFER_UCHAR can be running at any IRQL, assuming the Buffer is resident and the Port is resident, mapped device memory.

Requirements

Version

Available starting with Windows 2000.

Header

Wdm.h (include Wdm.h, Ntddk.h, or Ntifs.h)

Library

Hal.lib

IRQL

Any level (see Remarks section)

 

 

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