Windows定义的USB设备类型bInterfaceClass

Windows定义的USB接口描述符

typedef struct _USB_INTERFACE_DESCRIPTOR {
    UCHAR   bLength;
    UCHAR   bDescriptorType;
    UCHAR   bInterfaceNumber;
    UCHAR   bAlternateSetting;
    UCHAR   bNumEndpoints;
    UCHAR   bInterfaceClass;
    UCHAR   bInterfaceSubClass;
    UCHAR   bInterfaceProtocol;
    UCHAR   iInterface;
} USB_INTERFACE_DESCRIPTOR, *PUSB_INTERFACE_DESCRIPTOR;

bInterfaceClass字段所有值：

//
// With the exception of the HUB device class, USB class codes are not
// defined in the core USB 1.1, 2.0, 3.0 specifications.
//
#define USB_DEVICE_CLASS_RESERVED               0x00
#define USB_DEVICE_CLASS_AUDIO                  0x01
#define USB_DEVICE_CLASS_COMMUNICATIONS         0x02
#define USB_DEVICE_CLASS_HUMAN_INTERFACE        0x03
#define USB_DEVICE_CLASS_MONITOR                0x04
#define USB_DEVICE_CLASS_PHYSICAL_INTERFACE     0x05
#define USB_DEVICE_CLASS_POWER                  0x06
#define USB_DEVICE_CLASS_IMAGE                  0x06
#define USB_DEVICE_CLASS_PRINTER                0x07
#define USB_DEVICE_CLASS_STORAGE                0x08
#define USB_DEVICE_CLASS_HUB                    0x09
#define USB_DEVICE_CLASS_CDC_DATA               0x0A
#define USB_DEVICE_CLASS_SMART_CARD             0x0B
#define USB_DEVICE_CLASS_CONTENT_SECURITY       0x0D
#define USB_DEVICE_CLASS_VIDEO                  0x0E
#define USB_DEVICE_CLASS_PERSONAL_HEALTHCARE    0x0F
#define USB_DEVICE_CLASS_AUDIO_VIDEO            0x10
#define USB_DEVICE_CLASS_BILLBOARD              0x11
#define USB_DEVICE_CLASS_DIAGNOSTIC_DEVICE      0xDC
#define USB_DEVICE_CLASS_WIRELESS_CONTROLLER    0xE0
#define USB_DEVICE_CLASS_MISCELLANEOUS          0xEF
#define USB_DEVICE_CLASS_APPLICATION_SPECIFIC   0xFE
#define USB_DEVICE_CLASS_VENDOR_SPECIFIC        0xFF

bInterfaceClass定义了USB设备或者复合设备的类型，也用于生成USB设备的兼容ID。