READ_REGISTER_BUFFER_UCHAR function (wudfddi_hwaccess.h)

[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_REGISTER_BUFFER_UCHAR function reads a number of bytes from the specified register address into a buffer.

Syntax

void READ_REGISTER_BUFFER_UCHAR(
  [in]  IWDFDevice3 *pDevice,
  [in]  PUCHAR      Register,
  [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] Register

Pointer to the register, which must be a mapped range in memory 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