51单片机蜂鸣器音乐代码

以下是一个简单的51单片机连接蜂鸣器播放音乐的代码示例：

#include <reg51.h>

#define uchar unsigned char
#define uint unsigned int

uchar code music[]={0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88,0x88,0x88,0x88,0x98,0xA8,0x98,0x88};

void delay(uint x)   //延时函数
{
    uint i;
    while(x--)
        for(i=0;i<120;i++);
}

void main()
{
    uchar i=0;
    while(1)
    {
        P2=0xFE;    //输出高电平
        P0=music[i++];  //输出音乐频率
        delay(100); //延时一段时间
        if(i==sizeof(music))    //判断是否播放结束
            i=0;    //重新播放
    }
}

这段代码中，使用了一个名为“music”的数组来存储音乐频率，其中0x88代表音调1，0x98代表音调2，0xA8代表音调3，以此类推。同时，使用了一个“delay”函数来实现延时，以控制播放速度。在主函数中，通过循环不断输出音乐频率，实现了蜂鸣器播放音乐的效果。