本程序实现了对两相混合式电机提供4路驱动信号，相位相差90，180，另外也提供了拨码开关控制的频率输出选择，输出频率最大是5M,外部全局时钟是10M，采用的芯片是epm7128slc-84-15, 管脚分配可以参考管脚分配文件，对应驱动电机信号是两相双极性A+,A-,B+,B-. 编译环境是quartusII 8.0,这段代码可用来调试步进电机双桥驱动电路，也可用当信号发生器使用。-The program realization of two-phase hybrid motor provides 4-way drive signal, the phase difference of 90,180, also provided additional DIP switch control the frequency output options, the maximum output frequency is 5M, the external global clock is 10M, use the chips is epm7128slc-84-15, pin distribution can refer to the pin allocation file, the corresponding drive motor is a two-phase bipolar signal A+, A-, B+, B-. build environment is quartusII 8.0, this code can be used to debug step into the electrical double bridge driver circuit, can also be used when the signal generator.