用51单片机做的简易电子琴

#include <reg52.h> sbit BUZZ=P1^6;//蜂鸣器连续的IO口 unsigned char T1TH=0,T1TL=0; unsigned char code song1[]={ //两只老虎 0x14,0x14,0x24,0x34,0x14,0x14,0x24,0x34,0x14, 0x34,0x44,0x58,0x34,0x44,0x58, 0x53,0x61,0x53,0x41,0x34,0x14, 0x53,0x61,0x53,0x41,0x34,0x14, 0x14,0x54,0x18, 0x14,0x54,0x18, 0xFF //歌曲结束标志 }; unsigned char code song2[]={ //送别 0x54,0x54,0x32,0x52,0x88,0x64,0x84,0x58, 0x54,0x12,0x22,0x34,0x22,0x12,0x28,0x04,0x04, 0x54,0x32,0x52,0x86,0x72,0x64,0x84,0x58, 0x54,0x22,0x32,0x46,0xB2,0x18,0x04,0x04, 0x64,0x84,0x88,0x74,0x62,0x72,0x88, 0x62,0x72,0x82,0x62,0x62,0x52,0x32,0x12,0x28,0x04,0x04, 0x54,0x32,0x52,0x86,0x72,0x64,0x84,0x58, 0x54,0x22,0x32,0x46,0xB2,0x18,0x04,0x04, 0xFF }; unsigned char code cuzhi[]={ 0xFF,0xFF, // low mid high 0xFC,0x44, //1 ## 5 6 7 1 2 3 4 5 6 7 1 2 3 0xFC,0xAC, //2 ## D C B 1 2 3 4 5 6 7 8 9 A 0xFD,0x09, //3 0xFD,0x34, //4 0xFD,0x82, //5 0xFD,0xC8, //6 0xFE,0x06, //7 0xFE,0x2A, //8 --high 1 N = 470; 0xFE,0x48, //9 --hign 2 N = 440; 0xFE,0x66, //A --hign 3 N = 410; 0xFC,0x0C //B---low 7 N = 1012 }; void delay1ms(unsigned char z); //延时1MS void delay125ms(unsigned char z); //延时165MS,即十六分音符 void sing(); main() { EA=1;//开总中断 TMOD=0x10;//定时器1工作在方式1 TH1=0; TL1=0; ET1=1; while(1) { sing(); delay1ms(1000); } } void sing() { unsigned char temp; unsigned char jianpu; unsigned int i = 0; static unsigned char thesong = 0; while(1) { switch(thesong) { case 0:temp = song1[i];break; case 1:temp = song2[i];break; default:break; } if(temp == 0xFF) break; jianpu = (temp>>4); //取数的高4位 if(jianpu != 0) //不是休止符 { T1TH = cuzhi[jianpu*2]; T1TL = cuzhi[jianpu*2+1]; } //查表找初值 else //jp = 0,休止符 { TR1 = 0;BUZZ = 1; } //关蜂鸣器 delay125ms( temp & 0x0F ); //取数的低4位 TR1 = 0; //唱完一个音停10MS BUZZ = 1; delay1ms(10); TR1 = 1; i++; } TR1 = 0; BUZZ = 1; thesong++; if(thesong >=2) thesong = 0; } void delay125ms(unsigned char z) //延时165MS,即十六分音符 { unsigned int x,y; for(x=z;x>0;x--) for(y=15000;y>0;y--); } void delay1ms(unsigned char z) //延时1MS { unsigned int x,y; for(x=z;x>0;x--) for(y=112;y>0;y--); } void timer1() interrupt 3 //用于产生各种音调 { TH1=T1TH; TL1=T1TL; BUZZ = ~BUZZ; }