READ_PORT_BUFFER_UCHAR - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// miniport.h

VOID READ_PORT_BUFFER_UCHAR(
  [in]  PUCHAR Port,
  [out] PUCHAR Buffer,
  [in]  ULONG  Count
);
View the official Windows Driver Kit DDI reference
// wdm.h

NTHALAPI VOID READ_PORT_BUFFER_UCHAR(
  [in]  PUCHAR Port,
  [out] PUCHAR Buffer,
  [in]  ULONG  Count
);
View the official Windows Driver Kit DDI reference
// wudfddi_hwaccess.h

VOID READ_PORT_BUFFER_UCHAR(
  [in]  IWDFDevice3 *pDevice,
  [in]  PUCHAR      Port,
  [out] PUCHAR      Buffer,
  [in]  ULONG       Count
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-miniport-read_port_buffer_uchar)

READ_PORT_BUFFER_UCHAR function (miniport.h)

Description

The READ_PORT_BUFFER_UCHAR routine reads a number of bytes from the specified port address into a buffer.

Parameters

Port [in]

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

Buffer [out]

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

Count [in]

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

Remarks

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.

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Windows Driver Kit DDI reference (nf-wdm-read_port_buffer_uchar)

READ_PORT_BUFFER_UCHAR function (wdm.h)

Description

The READ_PORT_BUFFER_UCHAR routine reads a number of bytes from the specified port address into a buffer.

Parameters

Port [in]

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

Buffer [out]

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

Count [in]

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

Return value

None

Remarks

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.

View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wudfddi_hwaccess-read_port_buffer_uchar)

READ_PORT_BUFFER_UCHAR function (wudfddi_hwaccess.h)

Description

[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.

Parameters

pDevice [in]

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

Port [in]

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

Buffer [out]

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

Count [in]

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

Remarks

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

View the official Windows Driver Kit DDI reference

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