UsbConfigurationDescriptor Class

Reference

Definition

Namespace:: Windows.Devices.Usb

Important

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Derives information from the first 9 bytes of a USB configuration descriptor. The information includes the power capabilities of the device when the configuration is active and the number of interfaces included in that configuration. For an explanation of a configuration descriptor, Section 9.6.3 Universal Serial Bus Specification. For information about descriptor fields, see:

Table 9.15 in the Universal Serial Bus 3.0 Specification
Table 9.10 in the Universal Serial Bus Specification (version 2.0)

public ref class UsbConfigurationDescriptor sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class UsbConfigurationDescriptor final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class UsbConfigurationDescriptor

Public NotInheritable Class UsbConfigurationDescriptor

Inheritance: Object Platform::Object IInspectable UsbConfigurationDescriptor

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Remarks

A USB device exposes its capabilities in the form of a USB configuration. A USB configuration is described in a configuration descriptor that the UsbConfigurationDescriptor class represents. For information about the descriptor, see USB configuration descriptors.

Properties

ConfigurationValue	Gets the bConfigurationValue field of a USB configuration descriptor. The value is the number that identifies the configuration.
MaxPowerMilliamps	Gets the bMaxPower field of a USB configuration descriptor. The value indicates the maximum power (in milliamp units) that the device can draw from the bus, when the device is bus-powered.
RemoteWakeup	Gets the D5 bit value of the bmAttributes field in the USB configuration descriptor. The value indicates whether the device can send a resume signal to wake up itself or the host system from a low power state.
SelfPowered	Gets the D6 bit of the bmAttributes field in the USB configuration. This value indicates whether the device is drawing power from a local source or the bus.

Methods

Parse(UsbDescriptor)	Parses the specified USB descriptor and returns fields of a USB configuration descriptor.
TryParse(UsbDescriptor, UsbConfigurationDescriptor)	Retrieves the first 9 bytes of a USB configuration descriptor in a UsbConfigurationDescriptor object that is contained in a UsbDescriptor object.

Applies to

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