这篇程序是我一个同学编的,并且已经应用到了二相步进电机(四线步进电机)上了.但是我认为此程序需要改进的地方有很多. -This procedure is a fellow student, I made and have been applied to a two-phase stepper motor (four-wire stepper motor) on. But I think this process needs to be improved where there are ma