YangMing020017 issues

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                                            YangMing020017

主控出现设备描述符请求失败

![image](https://user-images.githubusercontent.com/101683301/172389953-a4fa5aa2-d72c-4c40-a56c-5de804606198.png) 能显示集线器 cp2102 usb3300却这样

跳线选择

焊接完同时选择下面两个跳线下载固件，软件更新后选择上面两个跳线使用。即先红后蓝 ![stlink](https://user-images.githubusercontent.com/101683301/230770420-59780415-d028-42a9-b2e5-55fedc902692.jpg)