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UsbConfigurationDescriptor Class
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 UsbConfigurationDescriptorPublic NotInheritable Class UsbConfigurationDescriptor- Inheritance
- Attributes
Windows requirements
| Requirements | Description |
|---|---|
| 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
| Name | Description |
|---|---|
| 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
| Name | Description |
|---|---|
| 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
See also
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