附上電路圖：


（資料大多引用于網(wǎng)上的大神）
#include
#define uint unsigned int
#define uchar unsigned char
sbit speaker=P1^0; //學(xué)校給的學(xué)習(xí)板次了點(diǎn)，用兩個(gè)I/O口控制蜂鳴器。不過大多數(shù)的學(xué)習(xí)板是一個(gè)I/O口控制。
sbit speaker1=P1^1; //如果你的板是一個(gè)I/O控制的，這行可以刪掉。
uint k,i;
unsigned char timer0h,timer0l,time;
//生日歌
code unsigned char sszymmh[]={
5,1,1, 5,1,1, 6,1,2, 5,1,2, 1,2,2, 7,1,4,
5,1,1, 5,1,1, 6,1,2, 5,1,2, 2,2,2, 1,2,4,
5,1,1, 5,1,1, 5,2,2, 3,2,2, 1,2,2, 7,1,2, 6,1,2,
4,2,1, 4,2,1, 3,2,2, 1,2,2, 2,2,2, 1,2,4};
// 音階頻率表 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,
} ;// 音階頻率表低八位
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 t1;
unsigned long t2;
for(t1=0;t1 {
for(t2=0;t2<8000;t2++)
{
;
}
}
TR0=0;
}
void t0int() interrupt 1
{
TR0=0;
speaker=!speaker;
TH0=timer0h;
TL0=timer0l;
TR0=1;
}
void song()
{
TH0=timer0h;
TL0=timer0l;
TR0=1;
delay(time);
}
void main(void)
{
speaker1=0; //一個(gè)I/O控制的話這行也要刪掉
//unsigned int k,i;
TMOD=1; //置CT0定時(shí)工作方式1
EA=1;
ET0=1;//IE=0x82 //CPU開中斷,CT0開中斷
while(1)
{
i=0;
while(i<75)
{ //音樂數(shù)組長度 ，唱完從頭再來
k=sszymmh[i]+7*sszymmh[i+1]-1;
timer0h=FREQH[k];
timer0l=FREQL[k];
time=sszymmh[i+2];
i=i+3;
song();
}
}
}