蜂鸣器演奏音乐.c

花钱购买的C51学习板里的源码

/***************************************************************
* 程序名称：《世上只有妈妈好》＋流水灯随音乐的节拍的快慢而动（转载修改）

****************************************************************/

#include <reg51.h>
sbit BELL=P3^7; //小喇叭
sbit key1=P3^5;
unsigned char timer0h,timer0l,time,led=1,j=0;
unsigned char flagd=0;

//世上只有妈妈好数据表
code unsigned char sszymmh[]={ 6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 
6,2,1, 5,2,1,6,2,4, 3,2,2, 5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,
6,1,1, 5,2,1, 3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2,5,2,1, 6,2,1, 
3,2,2, 2,2,2, 1,2,4, 5,2,3, 3,2,1,2,2,1, 1,2,1, 6,1,1, 1,2,1, 
5,1,6, 0,0,0 
};

// 音阶频率表 高八位
code unsigned char FREQH[]={0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8, 
0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
} ;

// 音阶频率表 低八位
code unsigned char FREQL[]={0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
0xEE,0x44, 0x6B,0xB4,0xF4,0x2D, 0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
};

void delay(unsigned char t)
{
	unsigned char sum1;
	unsigned long sum2;
	for(sum1=0;sum1<t;sum1++)
	{
		for(sum2=0;sum2<5000;sum2++)//节奏快慢
		{;}                                
	}
	TR0=0;
}

void t0int() interrupt 1
{
	TR0=0;
	BELL=!BELL;
	TH0=timer0h;
	TL0=timer0l;
	TR0=1;
}

void song()
	{
	TH0=timer0h;
	TL0=timer0l;
	TR0=1;
	delay(time);                       
	}

void main(void)
{
	unsigned char k,i;
	TMOD=1; //置CT0定时工作方式1
	EA=1;ET0=1;//IE=0x82 //CPU开中断,CT0开中断 

while(1)
{
i=0;
time=1;                             
while(time)
	{  
	if(j==8)
		{
		//led=1;
		j=0;flagd=~flagd;
		if(flagd)
			{
			led=0x80;
			}
			else
			{
			led=1;
			}
		}
		else
		{
			P2=~led;
			if(flagd)
				{
				led=led>>1;
				}
			else
			{
			led=led<<1;
			}
		j++;                                     
		}                                  

				k=sszymmh[i]+7*sszymmh[i+1]-1;
				timer0h=FREQH[k];
				timer0l=FREQL[k];
				time=sszymmh[i+2];
				i=i+3;
				song();
		}
	} 
}