实现步进电机的转动，使用51单片机，接受传感器传入的信息，使步进电机可以正转反转。有A/D转换的c编程，内附电路图，还未进行联调，仅供使用者参考。-Stepper motor rotation, the use of 51 microcontroller and accept incoming sensor information, the stepping motor can be forward reverse. There are A/D conversion of c programmi