READ_PORT_BUFFER_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 READ_PORT_BUFFER_UCHAR function reads a number of bytes from the specified port address into a buffer.

Syntax

void READ_PORT_BUFFER_UCHAR(
  [in]  IWDFDevice3 *pDevice,
  [in]  PUCHAR      Port,
  [out] PUCHAR      Buffer,
  [in]  ULONG       Count
);

Parameters

[in] pDevice

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

[in] Port

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

[out] Buffer

A 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.

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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