本程序可实现一个自动奏乐显示器，下载至单片机后可自动奏乐，演奏1,2,3,4,5,6,7等7个音符，并同时在1602液晶屏上显示正在演奏的音符。- This program can be realized a display automatically playing music.When it is downloaded to the microcontroller, it can play 1,2,3,4,5,6,and 7,and the notes being played is