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我用51单片机做了一个简易电子琴仿真的时候没感觉什么但是用实物调试的时候声音很奇怪声音有种抖动的感觉是不是延时有问题还是什么？程序如下 #include//51单片机头文件 #define uchar unsigned char #define uint unsigned int sbit beep=P2^0;//蜂鸣器接口定义 sbit reset=P1^6; //复位 sbit k1=P2^1; sbit k2=P2^2; sbit k3=P2^3; sbit k4=P2^4; sbit k5=P2^5; sbit k6=P2^6; sbit k7=P2^7; sbit k8=P3^3; sbit k9=P3^4; sbit k10=P3^5; sbit led1=P1^0; sbit led2=P1^1; sbit led3=P1^2; uchar aa,bb;//TH0,TL0 uchar flag=0xff;//模式,0表示音乐,ff表示按键 uchar key=0;//按键代号 uchar cc; uchar dd=0; uchar count=2; uchar code table2[]={ //音乐音符 0xfc,0x44,0xfc,0xac,0xfd,0x09,0xfd,0x34, 0xfD,0x82,0xfD,0xc8,0xfd,0x06,0xfb,0x04, 0xfb,0x90,0xfc,0x0c,0xfe,0x22,0xf9,0x5b, 0xfa,0x15, }; uchar code smg[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8, //共阳数码管段选码表，无小数点 0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e} ; uchar code jmszl[]={ //曲目二：寂寞沙洲冷 0x12,0x12,0x22,0x32,0x31,0x22,0x21,0x22, //自你走后心憔悴 0x21,0x31,0x51,0x52,0x31,0x52,0x61,0x15,0x14, //白色油桐风中纷飞 0x51,0x52,0x31,0x52,0x62,0x13,0x11,0x13,0x32,0x28,0x08,0x28, //落花似人有情这个季节 0x31,0x32,0x31,0x32,0x11,0x21,0x51,0x52,0x51,0x52, //河畔的风放肆拼命地吹 0x51,0x51,0x31,0x32,0x31,0x32,0x81,0x72,0x63, //不断拨弄离人的眼泪 0x62,0x71,0x81,0x72,0x61,0x61,0x52,0x31,0x21,0x32,0x51,0x54, //那样浓烈的爱再也无法给 0x22,0x12,0x11,0x12,0x11,0x12,0x12,0x14,0x26,0x32,0x26, //伤感一夜一夜 0x32,0x61,0x51,0x51,0x31,0x31,0x21,0x31,0x51,0x61,0x51,0x31,0x51, //当记忆的线缠绕过往支离破碎 0x02,0x32,0x81,0x81,0x81,0x81,0x62,0x52,0x34, //是慌乱占据了心扉 0x31,0x81,0x81,0x81,0x61,0x91,0x82, //有花儿伴着蝴蝶 0x51,0x51,0x51,0x51,0x31,0x61,0x53, //孤雁可以双飞 0x21,0x11,0x21,0x11,0x22,0x11,0x21,0x26, //夜深人静独徘徊 0x32,0x61,0x51,0x51,0x31,0x31,0x21,0x31,0x51,0x61,0x51,0x31,0x51,0x52, //当幸福恋人寄来红色分享喜悦 0x31,0x31,0x81,0x81,0x81,0x61,0x91,0x81,0x61,0x31,0x56, //闭上双眼难过头也不敢回 0x32,0x32,0x81,0x81,0x81,0x81,0x91,0x81,0x61,0x81,0x61,0x51,0x31,0x51,0x34, //仍然捡尽寒枝不肯安歇微带着后悔 0x21,0x31,0x51,0x31,0x21,0x11,0x61,0x21,0x16, //寂寞沙洲我该思念谁 0xff}; uchar code yldbwdx[]={//《月亮代表我的心》 0x02,0x82,0x16,0x32,0x54,0x02,0x52, 0xA6,0x32,0x54,0x02,0x52,0x64,0x74,0xB6,0x64, 0x52,0x5C,0x32,0x22,0x16,0x12,0x14,0x32,0x22, 0x16,0x12,0x14,0x22,0x32,0x26,0x12,0x94,0x22,0x32, 0x2C,0x32,0x52,0x36,0x22,0x14,0x54,0xAC,0x92,0xA2, 0x96,0xA2,0x96,0x82,0x3C,0x54,0x36,0x22,0x14,0x54, 0xAC,0x92,0xA2,0x16,0x12,0x14,0x22,0x32,0x2C,0x02,0x82,0x16, 0x32,0x56,0x12,0xA6,0x32,0x56,0x52,0x66,0x72,0xB6,0x62,0x1C, 0xff//结束标志 }; uchar code lzh[]={//《国歌》 0x03, 0x04,0x04,0xc2,0x14,0x12,0x12,0x12,0x11,0x11,0xc2,0xd1, 0xe1,0x14,0x02,0x32,0x12,0x21,0x31,0x52,0x51,0x51,0x54, 0x32,0x31,0x31,0x12,0x11,0x31,0x52,0x51,0x31,0x24,0x24, 0x24,0x64,0x54,0x24,0x34,0x52,0x32,0x21,0x31,0x12,0x11,0x21,0x34,0x04, 0x52,0x51,0xd1,0x12,0x12,0x32,0x31,0x31,0x52,0x51,0x51,0x22,0x22,0x22, 0xd2,0xd1,0x24,0x22,0xc2,0x14,0x12,0x34,0x32,0x32,0x54,0x54,0x54,0x54, 0x12,0x11,0x31,0x52,0x51,0x51,0x64,0x54,0x32,0x31,0x11,0x52,0x52,0x52, 0x32,0x02,0x12,0x02,0xc4,0x14,0xa2,0xa1,0x11,0x52,0x52,0x52,0x32,0x02, 0x12,0x02,0xc4,0x14,0xc4,0x14,0xc4,0x14,0x14,0x04,0x04,0x04,0x04,0x04, 0xff }; //按键音符 uchar code table3[]={ 0xFF,0xFF,0xF8,0x8B, 0xF9,0x5B,0xFA,0x14, 0xFA,0x66,0xFB,0x03, 0xFB,0x8F,0xFC,0x0B,//低音 0xFC,0x43,0xFC,0xAB, 0xFD,0x08,0xFD,0x33, 0xFD,0x81,0xFD,0xC7, 0xFE,0x05,//中音 0xFE,0x21,0xFE,0x55, 0xFE,0x84,0xFE,0X99, 0XFE,0xC0,0xFE,0xE3, 0xFF,0x02,//高音 }; //延时子函数 void delay(uchar i) //延时 { uchar j,k; for(j=0;j0;y--); } //播放音乐子函数 void music( uchar* musictab ) { uchar yinfu,jiepai; uchar i,j; uchar temp; temp = count; for(i=0;musictab[i]!=0xff;i++) //判断歌曲是否结束 { yinfu=(musictab[i]>>4); //提取音调信息 P0 = smg[yinfu%7]; jiepai=(musictab[i]&0x0f); //提取节拍信息 if(yinfu==0) continue; aa=table2[(yinfu-1)*2]; //转换成定时器的TH0 值 bb=table2[(yinfu-1)*2+1]; TR0=1; for(j=jiepai;j>0;--j) //节拍信息用于控制延时 { delay(250); } TR0=0; //唱完歌关闭定时器0 if(flag!=0) break; if(count!=temp) break; } } //响应按键子函数 void keyscan2() { if(key==0) return; else { aa=table3[dd*14+key*2]; bb=table3[dd*14+key*2+1]; TR0=1; delay(187); TR0=0; key=0; } } //运行子函数 void yunxing() { if(flag==0) { led1=1; led2=1; led3=1; switch(count) { case 1:music(jmszl); break; case 2:music(lzh); break; case 3:music(yldbwdx); break; } } else keyscan2(); } //按键扫描子函数 void keyscan1() { if(k1==1||k2==1||k3==1||k4==1||k5==1||k6==1||k7==1||k8==1||k9==1||k10==1) beep=1; if(P2==0xfd) //第一按键按下 { delay(12); //延时12MS if(P2==0xfd) //确定按下 { key=1; cc=key; } } else if(P2==0xfb) { delay(12); if(P2==0xfb) { key=2; cc=key; } } else if(P2==0xf7) { delay(12); if(P2==0xf7) { key=3; cc=key; } } else if(P2==0xef) { delay(12); if(P2==0xef) { key=4; cc=key; } } else if(P2==0xdf) { delay(12); if(P2==0xdf) { key=5; cc=key; } } else if(P2==0xbf) { delay(12); if(P2==0xbf) { key=6; cc=key; } } else if(P2==0x7f) { delay(12); if(P2==0x7f) { key=7; cc=key; } } else if(P3==0xf7) //低音模式键按下 { delay(12); if(P3==0xf7) { dd=0; led1=0; led2=1; led3=1; cc=dd; } } else if(P3==0xef) //中音模式键按下 { delay(12); if(P3==0xef) { dd=1; led1=1; led2=0; led3=1; cc=dd; } } else if(P3==0xdf) //高音模式键按下 { delay(12); if(P3==0xdf) { dd=2; led1=1; led2=1; led3=0; cc=dd; } } else return; } //数码管显示子函数 void display() //显示 { switch(cc) { case 0: P0=~0x3F; break; case 1: P0=~0x06; break; case 2: P0=~0x5B; break; case 3: P0=~0x4F; break; case 4: P0=~0x66; break; case 5: P0=~0x6D; break; case 6: P0=~0x7D; break; case 7: P0=~0x07; break; default:P0=~0x00; break; } switch(dd) { case 0: led1=0;led2=1;led3=1; break; case 1: led1=1;led2=0;led3=1; break; case 2: led1=1;led2=1;led3=0; break; } } //主函数 void main() { P2=0xff; //初始化 P0=0xff; P3=0xff; TMOD=0x01; IT0=1; TR0=0; EX0=1; ET0=1; EA=1; while(1) { keyscan1(); //按键扫描 yunxing(); //运行 display(); //显示 } } //定时器0中断子函数 void Timer_0() interrupt 1 //定时器0中断 { TH0=aa; TL0=bb; beep=~beep; if(!reset) flag=1; } //外部0中断子函数 void INT_0() interrupt 0 //外部中断0 { // flag=~flag; flag = 0 ; count++; if(count>3) count= 1; if(flag==0) { cc=8; P0=0xff; } }

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关于51单片机做一个简易电子琴的问题