READ_PORT_UCHAR - NtDoc

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

UCHAR READ_PORT_UCHAR(
  [in] PVOID Port
);
View the official Windows Driver Kit DDI reference
// miniport.h

UCHAR READ_PORT_UCHAR(
  [in] PUCHAR Port
);
View the official Windows Driver Kit DDI reference
// wdm.h

NTHALAPI UCHAR READ_PORT_UCHAR(
  [in] PUCHAR Port
);
View the official Windows Driver Kit DDI reference
// wudfddi_hwaccess.h

UCHAR READ_PORT_UCHAR(
  [in] IWDFDevice3 *pDevice,
  [in] PUCHAR      Port
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-ioaccess-read_port_uchar)

READ_PORT_UCHAR function (ioaccess.h)

Description

The READ_PORT_UCHAR routine reads a byte from the specified port address.

Parameters

Port [in]

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

Return value

READ_PORT_UCHAR returns the byte that is read from the specified port address.

Remarks

Callers of READ_PORT_UCHAR can be running at any IRQL, assuming 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-miniport-read_port_uchar)

READ_PORT_UCHAR function (miniport.h)

Description

The READ_PORT_UCHAR routine reads a byte from the specified port address.

Parameters

Port [in]

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

Return value

READ_PORT_UCHAR returns the byte that is read from the specified port address.

Remarks

Callers of READ_PORT_UCHAR can be running at any IRQL, assuming 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-wdm-read_port_uchar)

READ_PORT_UCHAR function (wdm.h)

Description

The READ_PORT_UCHAR routine reads a byte from the specified port address.

Parameters

Port [in]

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

Return value

READ_PORT_UCHAR returns the byte that is read from the specified port address.

Remarks

Callers of READ_PORT_UCHAR can be running at any IRQL, assuming 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_uchar)

READ_PORT_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_UCHAR function reads a byte from the specified port address.

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.

Return value

READ_PORT_UCHAR returns the byte that is read from the specified port address.

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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