我把程序加了注释，去掉了让人不好理解的和无实际作用的暂停函数，修正了音律赋值代码后音准更准了，要换歌自己按前段演示的音符把简谱编入音律符节拍数组即可，才学了2周单片机，这是我仔细消化后的改进了前辈的作业。

#include #define uchar unsigned charsbit beepIO=P0^7; //定义蜂鸣器端口为p0^7，根据单片机实际蜂鸣器实际接口改变uchar m,n;     //定义4个八度每八度12分音律共48音律uchar code T[49][2]={{0,0},//定义音律49个二维数组{0xF9,0x1F},{0xF9,0x82},{0xF9,0xDF},{0xFA,0x37},{0xFA,0x8A},{0xFA,0xD8},{0xFB,0x23},{0xFB,0x68},{0xFB,0xAA},{0xFB,0xE9},{0xFC,0x24},{0xFC,0x5B},{0xFC,0x8F},{0xFC,0xC1},{0xFC,0xEF},{0xFD,0x1B},{0xFD,0x45},{0xFD,0x6C},{0xFD,0x91},{0xFD,0xB4},{0xFD,0xD5},{0xFD,0xF4},{0xFE,0x12},{0xFE,0x2D},{0xFE,0x48},{0xFE,0x60},{0xFE,0x78},{0xFE,0x86},{0xFE,0xA3},{0xFE,0xB6},{0xFE,0xC9},{0xFE,0xDA},{0xFF,0xEB},{0xFE,0xFA},{0xFF,0x09},{0xFF,0x17},{0xFF,0x24},{0xFF,0x30},{0xFF,0x3C},{0xFF,0x47},{0xFF,0x51},{0xFF,0x5B},{0xFF,0x64},{0xFF,0x6D},{0xFF,0x75},{0xFF,0x7D},{0xFF,0x84},{0xFF,0x8B}};uchar code music[][2]={{0,4},//定义曲谱数组，前数为音律，后数为音符节拍 ，要换歌改变简谱对应的音律号即可{0,1},{1,1},{3,1},{5,1},{6,1},{8,1},{10,1},{12,1},{13,1},//演示超低音八度 123457671{0,1},{13,1},{15,1},{17,1},{18,1},{20,1},{22,1},{24,1},{25,1},//演示低音八度12345671{0,1},{25,1},{27,1},{29,1},{30,1},{32,1},{34,1},{36,1},{37,1},//演示中音八度12345671{0,1},{37,1},{39,1},{41,1},{42,1},{44,1},{46,1},{48,2},//演示高音八度 1234567{0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{14,8},{19,4},{21,4},{24,4},{21,4},{19,16},//记录菊花台简谱歌词：0553236 23532 天青色等烟雨 而我在等你{0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{12,8},{19,4},{21,4},{24,4},{19,4},{17,16},//简谱歌词：0553235 23521 炊烟袅袅升起 隔江千万里{0,4},{17,4},{19,4},{21,4},{24,4},{26,4},{24,4},{22,4},{24,4},{21,4},{21,4},{19,4},{19,16},//简谱歌词：01235654 53322 在平地书刻你房间上的飘影{0,4},{17,4},{19,4},{17,4},{17,4},{19,4},{17,4},{19,4},{19,4},{21,8},{24,4},{21,4},{21,12},//简谱歌词：就当我为遇见你伏笔{0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{14,8},{19,4},{21,4},{24,4},{21,4},{19,16}, //简谱歌词：0553236 23532 天青色等烟雨 而我在等你{0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{12,8},{19,4},{21,4},{24,4},{19,4},{17,16}, //简谱歌词：0553235 23521 月色被打捞起 掩盖了结局{0,4},{17,4},{19,4},{21,4},{24,4},{26,4},{24,4},{22,4},{24,4},{21,4},{21,4},{19,4},{19,12},//简谱歌词：0123 5654 5332 25 322 11 如传世的青花瓷在独自美丽{12,4},{21,8},{19,8},{19,4},{17,20},                                           //简谱歌词：你眼带笑意{0xFF,0xFF}}; //歌曲结尾标识void delay(uchar p)  //延时函数  无符号字符型变量{uchar i,j;     //定义无符号字符型变量J和Ifor(;p>0;p--)  // 此处P值即主函数的n值节拍个数for(i=181;i>0;i--) //延时181*181个机器周期约25毫秒，即一个1/16节拍for(j=181;j>0;j--);}  void T0_int() interrupt 1{beepIO=!beepIO;  //蜂鸣器翻转发声TH0=T[m][0]; TL0=T[m][1]; //音律延时周期次数码表赋给定时寄存器作为计数初始值,每TH0TL0个机器周期触发蜂鸣器端口翻转，演奏出不同音符}void main(){uchar i=0;      //定义无符号字符型变量i,初始值为0TMOD=0x01; EA=1; ET0=1;  //开启T0定时16位方式，总中断开启，开启T0外部中断请求while(1) //开始曲谱演奏，循环无限重复{m=music[ i][0];n=music[ i][1];  //将音律号赋值给m, 将节拍号赋值给nif(m==0x00)       //如果音律号为0，{TR0=0;delay(n);i++;}     //关闭计时器，延迟n拍，将循环数I加1 ，准备读下一个音符else if(m==0xFF)     //否则如果音律数为FF{TR0=0;delay(30);i=0;}     //开启节拍延时30个1/16节拍,歌曲停顿2秒,将循环数I置0else if(m==music[i+1][0])  // 否则如果把下一个音律号数给变量m{TR0=1;delay(n);TR0=0;i++;} //定时器0打开延迟n拍，关闭定时器T0，读下一个音符，循环数加1读下一个音律else     //音符若不为零{TR0=1;delay(n);i++;}//打开定时器，延时n个1/16拍，循环数I加1 ,准备演奏下一个音符}}