基于 8051 单片机的音乐播放程序

#include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit BEEP=P2^3; //定义喇叭输出端口 uchar tick,tl,th; //定义节拍和T0初值变量 uchar TABLE[]={ //音符节拍表 0x82,0x01,0x81,0x94,0x84,0xB4,0xA4,0x04, 0x82,0x01,0x81,0x94,0x84,0xC4,0xB4,0x04, 0x82,0x01,0x81,0xF4,0xD4,0xB4,0xA4,0x94, 0xE2,0x01,0xE1,0xD4,0xB4,0xC4,0xB4,0x04, 0x82,0x01,0x81,0x94,0x84,0xB4,0xA4,0x04, 0x82,0x01,0x81,0x94,0x84,0xC4,0xB4,0x04, 0x82,0x01,0x81,0xF4,0xD4,0xB4,0xA4,0x94, 0xE2,0x01,0xE1,0xD4,0xB4,0xC4,0xB4,0x04, 0x00}; uchar TABLE1[]={ //音符对应的定时器初值表 //64260,64400,64524,64580, 0xfb,0x04,0xfb,0x90,0xfc,0x0c,0xfc,0x44, //64684,64777,64820,64898, 0xfc,0xac,0xfd,0x09,0xfd,0x34,0xfd,0x82, //64968,65030,65058,65110, 0xfd,0xc8,0xfe,0x06,0xfe,0x22,0xfe,0x56, //65157,65178,65217 0xfe,0x85,0xfe,0x9a,0xfe,0xc1 }; /********************************* T0中断服务函数*********************************/ timer0() interrupt 1 using 1{ TL0=tl;TH0=th; //重装定时初值 BEEP=~BEEP; //喇叭输出端口电平取反 } /********************************* 基本单位延时函数*********************************/ void delay1(){ uint i; for(i=0;i<20000;i++); } /*********************************** 节拍延时函数***********************************/ void delay(tt){ uchar i; for(i=0;i<=tt;i++) delay1(); } /**********************************主函数**********************************/ void main(){ uchar t,t1,k=0; //定义临时变量 while(1){ TMOD=0x01;IE=0x82; //定义T0工作方式，开中断 while(TABLE[k]!=0){ //判断取得的简谱码是否为结束码 tick=(TABLE[k])&0x0f; //不是，则取节拍码 t=(_crol_(TABLE[k],4))&0x0f; //取音符码 if(t!=0){ //判断取得的音符码是否为0 t1=--t*2+1; //不是，根据取得的音符码计算T0初值 t=t*2; tl=TL0=TABLE1[t1]; th=TH0=TABLE1[t]; TR0=1; //启动T0 } else TR0=0; //取得的音符码为0，则停止T0 delay(tick); //根据则取的节拍码延时 k++; } TR0=0; //取得的简谱码为结束码，则停止T0 } }