linux usb Ææ¹ÖµÄÎÊÌâ

    struct usb_bus *busses;
    struct usb_bus *bus;
    struct usb_device_descriptor *desc;
    struct usb_device *dev;
    struct usb_dev_handle *m_USBHandle;

    usb_init();
    usb_find_busses();
    usb_find_devices();
   
    busses = usb_get_busses();
   
    for(bus = busses;bus;bus = bus -> next)
    {
        for(dev = bus -> devices; dev ; dev = dev -> next)
        {//search device
           
            desc = &(dev -> descriptor);
            printf("Vendor / Product ID: %04x:%04x\n",desc -> idVendor,desc -> idProduct);
            if((desc -> idVendor == 0x118f) && (desc -> idProduct == 0x087f))
            {//open device
                m_USBHandle = NULL;
                m_USBHandle = usb_open(dev);       
                if(m_USBHandle == NULL)