WRITE_PORT_UCHAR function (wudfddi_hwaccess.h)

Article
02/22/2024

[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The WRITE_PORT_UCHAR function writes a byte to the specified port address.

Syntax

void WRITE_PORT_UCHAR(
  [in] IWDFDevice3 *pDevice,
  [in] PUCHAR      Port,
  [in] UCHAR       Value
);

Parameters

[in] pDevice

Specifies a pointer to the IWDFDevice3 interface for the device object of the device to access.

[in] Port

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

[in] Value

Specifies a byte to be written to the port.

Return value

None

Remarks

For more information, see Reading and Writing to Device Registers in UMDF 1.x Drivers.

Requirements

Requirement	Value
End of support	Unavailable in UMDF 2.0 and later.
Target Platform	Desktop
Minimum UMDF version	1.11
Header	wudfddi_hwaccess.h

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