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1、基于51单片机的按键切换播放音乐原理图：引脚说明：共5个按键，分别接51单片机的P0~P4引脚，前4个按键控制播放设置好的四首音乐，第5个按键用来关闭音乐。按键采用中断方式，任意时刻按下任意按键则立即进入所按按键的功能；蜂鸣器接单片机的P3.6口。仿真说明：使用proteus仿真，晶振：12MHZ。程序代码如下：/*12Mhz晶振工作*/#include#defineuintunsignedint#defineucharunsignedcharsbitvoice=P3^6;ucharcodesound1[]={0xff,
2、0x40,0x80,0x30,0x40,0x2b,0x40,0x26,0x80,0x24,0x10,0x26,0x40,0x30,0x40,0x2b,0x80,0x30,0x40,0x39,0x40,0x30,0xc0,0x40,0x80,0x30,0x40,0x2b,0x40,0x26,0x40,0x26,0x20,0x24,0x20,0x20,0x40,0x30,0x40,0x24,0x80,0x26,0x10,0x20,0x40,0x2b,0x20,0x26,0x20,0x26,0x20,0x2b,0x20,0x2b,0xc0,0x
3、26,0x80,0x20,0x40,0x19,0x40,0x19,0x80,0x1c,0x10,0x1c,0x80,0x20,0x40,0x20,0x20,0x1c,0x20,0x19,0x40,0x1c,0x20,0x20,0x20,0x26,0xc0,0x24,0x80,0x24,0x10,0x20,0x40,0x1c,0x40,0x20,0x40,0x24,0x20,0x26,0x20,0x2b,0x80,0x33,0x40,0x33,0x20,0x39,0x20,0x40,0x40,0x39,0x40,0x30,0xc0,0x18
4、,0x80,0x1c,0x80,0x24,0x80,0x20,0x10,0x1c,0x80,0x19,0x40,0x19,0x20,0x19,0x20,0x19,0x40,0x1c,0x20,0x20,0x20,0x26,0xc0,0x18,0x80,0x1c,0x80,0x24,0x80,0x20,0x10,0x1c,0x80,0x1c,0x40,0x1c,0x20,0x1c,0x20,0x1c,0x40,0x24,0x20,0x26,0x20,0xff,0x20,0x00};//同一首歌*/ucharcodesound2[]={0xf
5、f,0x18,0x40,0x1c,0x20,0x18,0x20,0x13,0x40,0x13,0x20,0x15,0x20,0x13,0x20,0x15,0x20,0x13,0x20,0x15,0x20,0x18,0x20,0x19,0x20,0x1c,0x20,0x20,0x20,0x1c,0x40,0x19,0x20,0x18,0x20,0x15,0x40,0x10,0x80,0x13,0x10,0x10,0x40,0x15,0x10,0x13,0x10,0x18,0x10,0x1c,0x10,0x26,0x10,0x13,0x10,
6、0x18,0x10,0x1c,0x10,0x26,0x10,0x13,0x10,0x18,0x10,0x1c,0x10,0x26,0x10,0x13,0x10,0x18,0x10,0x1c,0x10,0x26,0x10,0x15,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x15,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x15,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x15,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x
7、18,0x10,0x1c,0x10,0x24,0x10,0x30,0x10,0x18,0x10,0x1c,0x10,0x24,0x10,0x30,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x19,0x10,0x19,0x10,0x20,0x10,0x2b,0x10,0x19,0x10,0x18,0xc0,0xff,0x40,0x40,0x10,0x39,0x20,0x30,0x20,0x2b,0x20,0x30,0x20,0x2b,0x20,0x26,0x20,0x26,0x20,0x26,0x20,0x26
8、,0x20,0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x20,0x26,0x20,0x26,0x20,0x26,0x20,0x26,0x20,0x26,0x20,
