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cc2540直接用usb采用otg的方式和手机通信，有人这样做过没？安卓和ios驱动这块好做吗？
CC2540并不支持USB Host 或USBOTG，只能zuowUSBslave设备。你可以自己研究实现这部分，但是TI暂未发布相关资料
就是cc2540做从机，手机当主机，像手机用otg插鼠标、键盘、U盘一样，，，不知道实现起来难度怎么样
