PC机与51单片机串口通讯程序，主要实现单片机发送和接收程序，PC端可以用VB,VC进行界面设计。-PC-MCU serial communication program with the 51, mainly to send and receive procedures for SCM, PC client can use VB, VC for interface design.

步进电机联机控制，将通讯电缆连接到计算机的COM1与控制器的RS-232口，再打开控制器的电源开关并设置好联机，最后打开上位机界面，(The control resource, data type, data analysis and processing library function are used to realize automatic measurement of control system. It mainly collects light intensity signals