1.生日快乐（蜂鸣器）
/************************************************************************
[???t??] C51ò?à?3ìDò(éú2ú?ìà?)
[1|?ü] í¨1yμ￥???ú?Y×àò?à?
2?é?ì????±￡oJ9
/**********************************************************************/
ORG 0000H
JMP MAIN
ORG 000BH
JMP INTT0
ORG 0100H
MAIN: MOV SP,#60H
MOV TMOD,#01H
SETB ET0
SETB EA
SETB TR0
START0: ;clr P1.5
MOV 30H,#00H
NEXT: MOV A,30H
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV R2,A
JZ ENDD
ANL A,#0FH
MOV R5,A
MOV A,R2
SWAP A
ANL A,#0FH
JNZ SING
CLR TR0
JMP D1
SING: DEC A
MOV 22H,A
RL A
MOV DPTR,#TABLE1
MOVC A,@A+DPTR
MOV TH0,A
MOV 21H,A
MOV A,22H
RL A
INC A
MOVC A,@A+DPTR
MOV TL0,A
MOV 20H,A
SETB TR0
D1: CALL DELAY
INC 30H
JMP NEXT
ENDD: CLR TR0
JMP START0
INTT0:
PUSH PSW
PUSH ACC
MOV TL0,20H
MOV TH0,21H
CPL P3.6
POP ACC
POP PSW
RETI
DELAY: MOV R7,#02
DELAY0: MOV R4,#187
DELAY1: MOV R3,#248
DJNZ R3,$
DJNZ R4,DELAY1
DJNZ R7,DELAY0
DJNZ R5,DELAY
RET
TABLE: DB 82H,01H,81H,94H,84H,0B4H,0A4H,04H
DB 82H,01H,81H,94H,84H,0C4H,0B4H,04H
DB 82H,01H,81H,0F4H,0D4H,0B4H,0A4H,94H
DB 0E2H,01H,0E1H,0D4H,0B4H,0C4H,0B4H,04H
DB 82H,01H,81H,94H,84H,0B4H,0A4H,04H
DB 82H,01H,81H,94H,84H,0C4H,0B4H,04H
DB 82H,01H,81H,0F4H,0D4H,0B4H,0A4H,94H
DB 0E2H,01H,0E1H,0D4H,0B4H,0C4H,0B4H,04H
TABLE1: DW 64260,64400,64524,64580,64684,64777,64820,64898
DW 64968,65030,65058,65110,65157,65178,65217
END
2.八月桂花（蜂鸣器）
/************************************************************************
[文件名] C51音乐程序(八月桂花)
[功能] 通过单片机演奏音乐
插上跳线帽 J9
/**********************************************************************/
#include <REG52.H>
#include <INTRINS.H>
//本例采用89C52, 晶振为12MHZ
//关于如何编制音乐代码, 其实十分简单,各位可以看以下代码.
//频率常数即音乐术语中的音调,而节拍常数即音乐术语中的多少拍;
//所以拿出谱子, 试探编吧!
sbit Beep = P3^6 ;
unsigned char n=0; //n为节拍常数变量
unsigned char code music_tab[] ={
0x18, 0x30, 0x1C , 0x10, //格式为: 频率常数, 节拍常数, 频率常数, 节拍常数,
0x20, 0x40, 0x1C , 0x10,
0x18, 0x10, 0x20 , 0x10,
0x1C, 0x10, 0x18 , 0x40,
0x1C, 0x20, 0x20 , 0x20,
0x1C, 0x20, 0x18 , 0x20,
0x20, 0x80, 0xFF , 0x20,
0x30, 0x1C, 0x10 , 0x18,
0x20, 0x15, 0x20 , 0x1C,
0x20, 0x20, 0x20 , 0x26,
0x40, 0x20, 0x20 , 0x2B,
0x20, 0x26, 0x20 , 0x20,
0x20, 0x30, 0x80 , 0xFF,
0x20, 0x20, 0x1C , 0x10,
0x18, 0x10, 0x20 , 0x20,
0x26, 0x20, 0x2B , 0x20,
0x30, 0x20, 0x2B , 0x40,
0x20, 0x20, 0x1C , 0x10,
0x18, 0x10, 0x20 , 0x20,
0x26, 0x20, 0x2B , 0x20,
0x30, 0x20, 0x2B , 0x40,
0x20, 0x30, 0x1C , 0x10,
0x18, 0x20, 0x15 , 0x20,
0x1C, 0x20, 0x20 , 0x20,
0x26, 0x40, 0x20 , 0x20,
0x2B, 0x20, 0x26 , 0x20,
0x20, 0x20, 0x30 , 0x80,
0x20, 0x30, 0x1C , 0x10,
0x20, 0x10, 0x1C , 0x10,
0x20, 0x20, 0x26 , 0x20,
0x2B, 0x20, 0x30 , 0x20,
0x2B, 0x40, 0x20 , 0x15,
0x1F, 0x05, 0x20 , 0x10,
0x1C, 0x10, 0x20 , 0x20,
0x26, 0x20, 0x2B , 0x20,
0x30, 0x20, 0x2B , 0x40,
0x20, 0x30, 0x1C , 0x10,
0x18, 0x20, 0x15 , 0x20,
0x1C, 0x20, 0x20 , 0x20,
0x26, 0x40, 0x20 , 0x20,
0x2B, 0x20, 0x26 , 0x20,
0x20, 0x20, 0x30 , 0x30,
0x20, 0x30, 0x1C , 0x10,
0x18, 0x40, 0x1C , 0x20,
0x20, 0x20, 0x26 , 0x40,
0x13, 0x60, 0x18 , 0x20,
0x15, 0x40, 0x13 , 0x40,
0x18, 0x80, 0x00
};
void int0() interrupt 1 //采用中断0 控制节拍
{ TH0=0xd8;
TL0=0xef;
n--;
}
void delay (unsigned char m) //控制频率延时
{
unsigned i=3*m;
while(--i);
}
void delayms(unsigned char a) //豪秒延时子程序
{
while(--a); //采用while(--a) 不要采用while(a--); 各位可编译一下看看汇编结果就知道了!
}
void main()
{ unsigned char p,m; //m为频率常数变量
unsigned char i=0;
TMOD&=0x0f;
TMOD|=0x01;
TH0=0xd8;TL0=0xef;
IE=0x82;
play:
while(1)
{
a: p=music_tab[i];
if(p==0x00) { i=0, delayms(1000); goto play;} //如果碰到结束符,延时1秒,回到开始再来一遍
else if(p==0xff) { i=i+1;delayms(100),TR0=0; goto a;} //若碰到休止符,延时100ms,继续取下一音符
else {m=music_tab[i++], n=music_tab[i++];} //取频率常数 和 节拍常数
TR0=1; //开定时器1
while(n!=0) Beep=~Beep,delay(m); //等待节拍完成, 通过P1口输出音频(可多声道哦!)
TR0=0; //关定时器1
}
}
3.信号发生器(产生方波)
ORG 00H
LJMP START
ORG 0BH
LJMP INTT0
ORG 30H
START:
MOV TMOD,#00000010B
MOV TCON,#00010000B
MOV IE ,#10000010B
MOV TH0,#0D2H //?¨ê±50US
MOV TL0,#0D2H //TH0===TL0
AJMP $
INTT0:
CPL P1.0//50US1//50US0
RETI
END