说明：  微原的课程设计，包括步进机、电子琴、秒表和抢答器，我做的是步进机和抢答器，这两个是一定可以用的，但要注意的是，不同的接线方式用到的接口地址是不同的，所以要注意修改地址
(Micro-courses of the original design, including step machine, organ, stopwatch, and Responder, I am doing is stepping machines and Responder, the two could certainly be used, but to note is that different ways of wiring used in The interface address is different, so pay attention to modify the address of)