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请问为什么cc2540 usb dongle在win7系统找不到驱动程序驱动，显示为未知设备？
pc试着更新一下驱动
D:\Texas Instruments\BLE-CC254x-1.3.2\Accessories\Drivers\ccxxxx_usb_cdc
此问题发生在我的win7上，更新驱动后好了
http://lfwendula0.blog.163.com/blog/static/205138236201411893450889/?newFollowBlog
谢谢你的回复 这个问题我已经解决了。
怎么解决的？是不是驱动没有安装？
是的 找到驱动文件更新驱动就可以了
