msp430f149单片机，蜂鸣器模块,程序功能：用固定频率的方波驱动蜂鸣器，共16种音调；在蜂鸣器发出不同音调的同时，LED发光以二进制数字形式指示当前音调的编号（1~16）-msp430f149 microcontroller, buzzer module, the program features: fixed frequency square wave drive buzzer, a total of 16 kinds of tones　buzzer sounded different notes at the same time, LED light in the form of binary digits indicate the current tone number (1 ~ 16)