毕业设计的一个PMAC源码，用来控制直线电机，实现 光栅尺寻零， 并根据输入频率控制直线电机 产生正弦振荡-Designed as a graduate PMAC source, used to control the linear motor, achieve Grating find zero, and in accordance with an input frequency control of linear motors have a sinusoidal oscillation