USB Type-C如何实现OTG功能

正在学习

目前国内还做得比较少，这个需要驱动和电路支持，usb-c可以自定义部分管脚功能，诺基亚和苹果不是搞出产品出来了么，上国外论坛看看，快了

USB Type C
1. Single connector and cable type for Data, Audio-video , Power (Support for USB PD)
2. Flip-able connector (upside-up or upside-down )
3. Robust EMI solution designed in from the startShielding at the tongue (better EMI and noise Floor)
Support USB 2.0, USB 3.0 , USB 3.1 and USB PD
4. Small form factor receptacle (3 mm thick, 8.5 mm wide, 9.5 mm deep)
5. Support 4 high speed diff pairs (Scalable to ≥ 20 Gbps ) Road map to higher speeds

电路部分把ID脚接到GPIO，加一路5V供电（可用高通SMB系列DCIN输出5V或外接DCDC），然后需要驱动去检测ID脚，为低时输出5V，则开启OTG功能。