READ_PORT_BUFFER_UCHAR routine

The READ_PORT_BUFFER_UCHAR routine reads a number of bytes from the specified port address into a buffer.

Syntax


VOID READ_PORT_BUFFER_UCHAR(
  _In_  PUCHAR Port,
  _Out_ PUCHAR Buffer,
  _In_  ULONG  Count
);

Parameters

Port [in]

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

Buffer [out]

Pointer to a buffer into which an array of UCHAR values is read.

Count [in]

Specifies the number of bytes to be read into the buffer.

Return value

None

Remarks

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

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

Requirements

Target platform

Universal

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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