A structure representing the standard USB interface association descriptor. More...

#include <libusb.h>

Data Fields
uint8_t	bLength
	Size of this descriptor (in bytes)

uint8_t	bDescriptorType
	Descriptor type.

uint8_t	bFirstInterface
	Interface number of the first interface that is associated with this function.

uint8_t	bInterfaceCount
	Number of contiguous interfaces that are associated with this function.

uint8_t	bFunctionClass
	USB-IF class code for this function.

uint8_t	bFunctionSubClass
	USB-IF subclass code for this function.

uint8_t	bFunctionProtocol
	USB-IF protocol code for this function.

uint8_t	iFunction
	Index of string descriptor describing this function.

Detailed Description

A structure representing the standard USB interface association descriptor.

This descriptor is documented in section 9.6.4 of the USB 3.0 specification. All multiple-byte fields are represented in host-endian format.

Field Documentation

◆ bDescriptorType

uint8_t libusb_interface_association_descriptor::bDescriptorType

Descriptor type.

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

◆ bFunctionClass

uint8_t libusb_interface_association_descriptor::bFunctionClass

USB-IF class code for this function.

A value of zero is not allowed in this descriptor. If this field is 0xff, the function class is vendor-specific. All other values are reserved for assignment by the USB-IF.

◆ bFunctionSubClass

uint8_t libusb_interface_association_descriptor::bFunctionSubClass

USB-IF subclass code for this function.

If this field is not set to 0xff, all values are reserved for assignment by the USB-IF

◆ bFunctionProtocol

uint8_t libusb_interface_association_descriptor::bFunctionProtocol

USB-IF protocol code for this function.

These codes are qualified by the values of the bFunctionClass and bFunctionSubClass fields.

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