蜂鸣器实验 向蜂鸣器发送一定频率的方波可以使蜂鸣器发出相应的音调，该实验通过设计一个状 态机和分频器使蜂鸣器发出“多来咪发梭拉西多”的音调。-buzzer to buzzer this experiment certain frequency square wave can buzzer sounded a corresponding pitch. The experiment by designing a state machine and the buzzer sounded a d