libusb_ss_usb_device_capability_descriptor Struct Reference

A structure representing the SuperSpeed USB Device Capability descriptor This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification. More...

#include <libusb.h>

Data Fields
uint8_t	bLength
	Size of this descriptor (in bytes)
uint8_t	bDescriptorType
	Descriptor type.
uint8_t	bDevCapabilityType
	Capability type.
uint8_t	bmAttributes
	Bitmap encoding of supported device level features.
uint16_t	wSpeedSupported
	Bitmap encoding of the speed supported by this device when operating in SuperSpeed mode.
uint8_t	bFunctionalitySupport
	The lowest speed at which all the functionality supported by the device is available to the user.
uint8_t	bU1DevExitLat
	U1 Device Exit Latency.
uint16_t	bU2DevExitLat
	U2 Device Exit Latency.

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Detailed Description

A structure representing the SuperSpeed USB Device Capability descriptor This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification.

All multiple-byte fields are represented in host-endian format.

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Field Documentation

uint8_t libusb_ss_usb_device_capability_descriptor::bDescriptorType

Descriptor type.

Will have value libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY LIBUSB_DT_DEVICE_CAPABILITY in this context.

uint8_t libusb_ss_usb_device_capability_descriptor::bDevCapabilityType

Capability type.

Will have value libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY LIBUSB_BT_SS_USB_DEVICE_CAPABILITY in this context.

uint8_t libusb_ss_usb_device_capability_descriptor::bmAttributes

Bitmap encoding of supported device level features.

A value of one in a bit location indicates a feature is supported; a value of zero indicates it is not supported. See libusb_ss_usb_device_capability_attributes.

uint16_t libusb_ss_usb_device_capability_descriptor::wSpeedSupported

Bitmap encoding of the speed supported by this device when operating in SuperSpeed mode.

See libusb_supported_speed.

uint8_t libusb_ss_usb_device_capability_descriptor::bFunctionalitySupport

The lowest speed at which all the functionality supported by the device is available to the user.

For example if the device supports all its functionality when connected at full speed and above then it sets this value to 1.

uint8_t libusb_ss_usb_device_capability_descriptor::bU1DevExitLat

U1 Device Exit Latency.

uint16_t libusb_ss_usb_device_capability_descriptor::bU2DevExitLat

U2 Device Exit Latency.

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The documentation for this struct was generated from the following file:

• libusb.h