在单片机与上位机PC通信的过程中,通信速率一般是固定的,并且是一致的,否则通信不会成功,此程序介绍了如何实现串口通信的波特率自动识别.-in SCM between PC and communications process, the communication speed is usually fixed, and is the same. Otherwise communications will not be successful, this procedure on how to achieve serial communication baud rate of automatic identification.