说明：   这是一个基于MCU的电机控制系统，单片机接收PC的信息，根据Modbus通信协议转换为相应电机控制命令。 整个程序在keil环境下开发，实现了电机的启动、停止、增速、减速、反馈运行时间和速度的功能。
(This an MCU-based motor control system, the 8031 PC receiving the information, according to Modbus communication protocol conversion to the corresponding motor control commands. Keil in the whole process environment in development and the launch of the motor, stop, the growth rate, deceleration, feedback running time and speed functions.)