直接在quartus 2上运行，然后烧进试验箱，可以播放梁祝，连线就两根，一根连20MHZ，一根连蜂鸣器输入端，另一头连拓展插槽的B01，按键1控制播放、暂停，模式5，可以用点个赞，(Run it directly on quartus 2, and then burn it into the test box. You can play Liang Zhu. There are only two wires, one is 20MHz, one is buzzer input, the oth