// wdfhwaccess.h

VOID WDF_WRITE_PORT_BUFFER_UCHAR(
  [in] WDFDEVICE Device,
  [in] PUCHAR    Port,
  [in] PUCHAR    Buffer,
  [in] ULONG     Count
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wdfhwaccess-wdf_write_port_buffer_uchar)

WDF_WRITE_PORT_BUFFER_UCHAR function

Description

[Applies to UMDF only]

The WDF_WRITE_PORT_BUFFER_UCHAR function writes a number of bytes from a buffer to the specified port.

Parameters

`Device` [in]

A handle to a framework device object.

`Port` [in]

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

`Buffer` [in]

A 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 buffer.

Remarks

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

View the official Windows Driver Kit DDI reference