用单片机控制步进电机驱动芯片：A3972，实现64细分。本程序基于C编写，没有用中断，移植性极高。本人是作者：陈先生，13802939662。-MCU controlled stepper motor driver chips : A3972, achieving 64 segments. The preparation process based on C, with no interruption, highly transplantation. I Author : Chen, 13802