ch340芯片使用手册以及舵机控制板的介绍，及原理图说明。希望对大家有帮助！对做双足机器人的同志们有用，可以参考一下这个(Ch340 chip manual, as well as servo control board introduction, and schematic descr iption. We hope to help everyone! Pairs of biped robot comrades useful, you can refer to this)