USB interface descriptor. More...

Public Attributes
db	bInterfaceNumber

db	bAlternateSetting

db	bNumEndpoints

db	bInterfaceClass

db	bInterfaceSubClass

db	bInterfaceProtocol

db	iInterface

Detailed Description

USB interface descriptor.

Source: bus/usb/protocol.inc:117

Member Data Documentation

◆ bAlternateSetting

db usb_interface_descr::bAlternateSetting

◆ bInterfaceClass

db usb_interface_descr::bInterfaceClass

Number of endpoints used by this interface, excluding zero endpoint

◆ bInterfaceNumber

db usb_interface_descr::bInterfaceNumber

The following two fields work in pair. Sometimes one interface can work in different modes; e.g. videostream from web-cameras requires different bandwidth depending on resolution/quality/compression settings. Each mode of each interface has its own descriptor with its own endpoints following; all descriptors for one interface have the same bInterfaceNumber, and different bAlternateSetting. By default, any interface operates in mode with bAlternateSetting = 0. Often this is the only mode. If there are another modes, the active mode is selected by SET_INTERFACE(bAlternateSetting) control request.

◆ bInterfaceProtocol

db usb_interface_descr::bInterfaceProtocol

USB Interface Subclass Code

◆ bInterfaceSubClass

db usb_interface_descr::bInterfaceSubClass

USB Interface Class Code

◆ bNumEndpoints

db usb_interface_descr::bNumEndpoints

◆ iInterface

db usb_interface_descr::iInterface

USB Interface Protocol Code

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

bus/usb/protocol.inc

Public Attributes