READ_PORT_BUFFER_UCHAR function (miniport.h)

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
);

[in] Port

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

[out] Buffer

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

[in] Count

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

None

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.

Requirement	Value
Minimum supported client	Available starting with Windows 2000.
Target Platform	Universal
Header	miniport.h (include Wdm.h, Ntddk.h, Ntifs.h, Miniport.h)
Library	Hal.lib
IRQL	Any level (see Remarks section)