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;j for(k=0;k<148;k++); } void delay1(uint z) //延时1MS { uint x,y; for(x=z;x>0;x--) for(y=112;y>0;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; } }
