89C52初始化接收命令控制电机，内部中断延时程序-89C52 initialization receive commands to control the motor, the internal interrupt latency program

基于89C52单片的步进电机的转动原理，也就是利用单片机来控制步进电机的转动-89C52 single-chip stepper motor rotation principle, that is, the use of single-chip stepper motor to control rotation