/* This function will register hub class driver to the usb class driver manager. and it should be invoked in the usb system initialization. */
ucd_t rt_usb_class_driver_hub(void)
/* This function will register hub class driver to the usb class driver manager. and it should be invoked in the usb system initialization. */
ucd_t rt_usb_class_driver_hub(void)
{    
    hub_driver.class_code = USB_CLASS_HUB;
    hub_driver.run = rt_usb_hub_run;
    hub_driver.stop = rt_usb_hub_stop;
    return &hub_driver;
}