USB数据接收和数据发送，包含了USB 设备的配置，USB 配置描述符的接口，USB 设备的接口，USB 设备描述符的接口，USB 端点的接口，USB 端点描述符的接口，USB hub 的接口，USB 接口的接口，USB 接口描述符的接口，USB 管道的接口，USB 端口的接口(USB data receiving and sending, contains a USB device configuration, USB interface configuration descr iptor, USB device interface, USB device descr iptor interface, USB endpoint interface, USB endpoint descr iptor interface, interface of USB hub, USB interface, the interface of USB interface descr iptor, USB pipeline interface, the interface of USB port)