本程序是用VHDL语言编写的，其中包括并口通讯，DDS电机调速,编码器信号处理等，对研究这方面的工程人员有一定参考作用-This procedure is used VHDL language, including the parallel port communication, DDS motor, encoder signal processing and so on, to look at this area of engineering staff have a certain refe