USB设备类型代码---所有支持的都在这里，很重要
USB支持的设备类型没有写到USB2.0的规格书上面，在官网的这个位置才有详细的讲述。http://www.usb.org/developers/defined_class
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USB defines class code information that is used to identify a device’s functionality and to nominally load a device driver based on that functionality. The information is contained in three bytes with the names Base Class, SubClass, and Protocol. (Note that ‘Base Class’ is used in this description to identify the first byte of the Class Code triple. That terminology is not used in the USB Specification). There are two places on a device where class code information can be placed.One place is in the Device Descriptor, and the other is in Interface Descriptors. Some defined class codes are allowed to be used only in a Device Descriptor, others can be used in both Device and Interface Descriptors, and some can only be used in Interface Descriptors. The table below shows the currently defined set ofBase Class values, what the generic usage is, and where that Base Class can be used (either Device or Interface Descriptors or both).
Base ClassDescriptor Usage
Description00hDevice
Use class information in the Interface Descriptors01hInterface
Audio 02hBoth
Communications and CDC Control03hInterface
HID (Human Interface Device)05hInterface
Physical06hInterface
Image07hInterface
Printer08hInterface
Mass Storage09hDevice
Hub0AhInterface
CDC-Data0BhInterface
Smart Card0DhInterface
Content Security0EhInterface
Video0FhInterface
Personal HealthcareDChBoth
Diagnostic DeviceE0hInterface
Wireless ControllerEFhBoth
MiscellaneousFEhInterface
Application SpecificFFhBoth
Vendor Specific
Base Class 00h (Device)
This base class is defined to be used in Device Descriptors to indicate that class information should be determined from the Interface Descriptors in the device. There is one class code definition in this base class.All other values are reserved.
This value is also used in Interface Descriptors to indicate a null class code triple.
Base ClassSubClassProtocol
Meaning00h00h00h
Use class code info from Interface Descriptors
Base Class 01h (Audio)
This base class is defined for Audio capable devices that conform to the Audio Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes may only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning01hxxhxxh
Audio device
Base Class 02h (Communications and CDC Control)
This base class is defined for devices that conform to the Communications Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved.Note that the Communication Device Class spec requires some class code values (triples) to be used in Device Descriptors and some to be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning02hxxhxxh
Communication device class
Base Class 03h (HID – Human Interface Device)
This base class is defined for devices that conform to the HID Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning03hxxhxxh
HID device class
Base Class 05h (Physical)
This base class is defined for devices that conform to the Physical Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values.Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning05hxxhxxh
Physical device class
Base Class 06h (Still Imaging)
This base class is defined for devices that conform to the Imaging Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved.
Base ClassSubClassProtocol
Meaning06h01h01h
Still Imaging device
Base Class 07h (Printer)
This base class is defined for devices that conform to the Printer Device Class Specification found on the USB-IF website.That specification defines the usable set of SubClass and Protocol values.Values outside of that defined spec are reserved.These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning07hxxhxxh
Printer device
Base Class 08h (Mass Storage)
This base class is defined for devices that conform to the Mass Storage Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning08hxxhxxh
Mass Storage device
Base Class 09h (Hub)
This base class is defined for devices that are USB hubs and conform to the definition in the USB specification.That specification defines the complete triples as shown below.All other values are reserved.These class codes can only be used in Device Descriptors.
Base ClassSubClassProtocol
Meaning09h00h00h
Full speed Hub01h
Hi-speed hub with single TT02h
Hi-speed hub with multiple TTs
Base Class 0Ah (CDC-Data)
This base class is defined for devices that conform to the Communications Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values.Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning0Ahxxhxxh
CDC data device
Base Class 0Bh (Smart Card)
This base class is defined for devices that conform to the Smart Card Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values.Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning0Bhxxhxxh
Smart Card device
Base Class 0Dh (Content Security)
This base class is defined for devices that conform to the Content Security Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning0Dh00h00h
Content Security device
Base Class 0Eh (Video)
This base class is defined for devices that conform to the Video Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning0Ehxxhxxh
Video device
Base Class 0Fh (Personal Healthcare)
This base class is defined for devices that conform to the Personal Healthcare Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes should only be used in Interface Descriptors.
Base ClassSubClassProtocol
Meaning0Fhxxhxxh
Personal Healthcare device
Base Class DCh (Diagnostic Device)
This base class is defined for devices that diagnostic devices. There is currently only one value defined. All other values are reserved. This class code can be used in Device or Interface Descriptors.
Base ClassSubClassProtocol
MeaningDCh01h01h
USB2 Compliance Device.Definition for this device can be found athttp://www.intel.com/technology/usb/spec.htm
Base Class E0h (Wireless Controller)
This base class is defined for devices that are Wireless controllers. Values not shown in the table below are reserved. These class codes are to be used in Interface Descriptors, with the exception of the Bluetooth class code which can also be used in a Device Descriptor.
Base Class
SubClass
Protocol
Meaning
E0h
01h
01h
Bluetooth Programming Interface.Get specific information fromwww.bluetooth.com.
02h
UWB Radio Control Interface.Definition for this is found in the Wireless USB Specification in Chapter 8.
03h
Remote NDIS.Information can be found at:http://www.microsoft.com/windowsmobile/mobileoperators/default.mspx
04h
Bluetooth AMP Controller. Get specific information fromwww.bluetooth.com.
2h
01h
Host Wire Adapter Control/Data interface.Definition can be found in the Wireless USB Specification in Chapter 8.
02h
Device Wire Adapter Control/Data interface.Definition can be found in the Wireless USB Specification in Chapter 8.
03h
Device Wire Adapter Isochronous interface.Definition can be found in the Wireless USB Specification in Chapter 8.
Base Class EFh (Miscellaneous)
This base class is defined for miscellaneous device definitions. Values not shown in the table below are reserved.The use of these class codes (Device or Interface descriptor) are specifically annotated in each entry below.
Base ClassSubClassProtocol
MeaningEFh01h01h
Active Sync device.This class code can be used in either Device or Interface Descriptors.Contact Microsoft for more information on this class.02h
Palm Sync.This class code can be used in either Device or Interface Descriptors.02h01h
Interface Association Descriptor.The usage of this class code triple is defined in the Interface Association Descriptor ECN that is provided on www.usb.org.This class code may only be used in Device Descriptors.02h
Wire Adapter Multifunction Peripheral programming interface. Definition can be found in the Wireless USB Specification in Chapter 8.This class code may only be used in Device Descriptors03h01h
Cable Based Association Framework.This is defined in the Association Model addendum to the Wireless USB specification.This class code may only be used in Interface Descriptors.
Base Class FEh (Application Specific)
This base class is defined for devices that conform to several class specifications found on the USB-IF website.That specification defines the usable set of SubClass and Protocol values.Values outside of that defined spec are reserved.These class codes can only be used in Interface Descriptors.
Base ClassSubClassProtocol
MeaningFEh01h01h
Device Firmware Upgrade.Device class definition provided on www.usb.org.02h00h
IRDA Bridge device.Device class definition provided on www.usb.org.03h00h
USB Test and Measurement Device.Definition provided in the USB Test and Measurement Class spec found on www.usb.org.01h
USB Test and Measurement Device conforming to the USBTMC USB488 Subclass Specification found on www.usb.org.
Base Class FFh (Vendor Specific)
This base class is defined for vendors to use as they please.These class codes can be used in both Device and Interface Descriptors.
Base ClassSubClassProtocol
MeaningFFhxxhxxh
Vendor specific
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