求几首单片机经典歌曲乐谱,及蜂鸣器驱动原理和 C语言程序。答:unsigned char code pinlv[]={131,110,98, 87, 73, 87, 110,98, 131,0,110,98, 87, 73, 73, 65, 98, 87,87,87,73,65,73,65,55,58,65,73,65,87,110,98,87,73,110,131,110,98,87,65,73,73,0,87,65,65,73,82,87,98,87,73,131,110,98,0,110,98,87,73,65,55,...