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请问USB PD协议是怎么握手的?怎么简单的从市面上的USB PD充电器上获取高功率电源?



请问USB PD协议是怎么握手的?怎么简单的从市面上的USB PD充电器上获取高功率电源?用单片机和CC脚通信可以吗?还是说用专用的CC控制芯片?