51单片机音乐门铃的设计

控制/MCU

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描述

buzzerequp2.4

KEYEQUP3.7

org00h;主程序起始地址

jmpstart;跳动主程序

org0bh;timer0中断起始地址

jmptim0;跳至timer0在mode1

start: MOV tmod,#00000001b;设timer0在mode1

MOV ie,#10000010b;中断使能

jbKEY,$;第一次按to?

calldelay1;消除抖动

jnbKEY,$;to放开?

MOV 31h,#00;按to次数计数指针初值为00h

start0:

MOV 30h,#lowsong;取简谱码指针(第1首)

next: MOV a,30h

MOV dptr,#table

MOV ca,@a+dptr;至相关页码,高4位为音符的高低

MOV r2,a;低4位为音符的节拍

jzend0;检查简谱码是否已结束(有无00?)

anla,#0fh;取节拍(低4位)

MOV r5,a;存入r5,节拍的时间

MOV a,r2

swapa

anla,#0fh;取音频值(高4位)

jnzsing;是否为0,是0则不发音

clrtr0

jmpd1

sing:deca;因0不列入

MOV 22h,a;存入(22h)

rla;乘2

MOV dptr,#table

MOV ca,@a+dptr;至table取码,取t的值

MOV th0,a;取到的高位字节存入th0

MOV 21h,a;取到的高位字节存入(21h)

MOV a,22h;再载入取到的音符码

rla;乘2

inca;加1

MOV ca,@a+dptr;至table取相对的低位字节计数值

MOV tl0,a;取到的低位字节存入tl0

MOV 20h,a;取到的低位字节存入(20h)

setbtr0;启动timer0

d1:calldelay

inc30h;取简谱码指针加1

jmpnext

end0:clrtr0;停止计数器

MOV a,31h;载入计次指针

xrla,#00h;是否按第1次?

jnzend1;不是则跳至end1

jbKEY,$;按第2次?

calldelay1;消除抖动

jnbKEY,$;放开否?

inc31h;计次地址(31h)加1

MOV 30h,#lowsong1;第2首歌指针

jmpnext

end1:

MOV a,31h;载入计次指针

xrla,#01h;是否按第2次?

jnzend2;不是则跳至end2

jbKEY,$;按第3次?

calldelay1;消除抖动

jnbKEY,$;放开否?

inc31h;计次地址(31h)加1

MOV 30h,#lowsong2;第3首歌指针

jmpnext

end2:

MOV a,31h;载入计次指针

xrla,#02h;是否按第3次?

jnzend3;不是则跳至end3

jbKEY,$;按第4次?

calldelay1;消除抖动

jnbKEY,$;放开否?

inc31h;计次地址(31h)加1

MOV 30h,#lowsong3;第4首歌指针

jmpnext

end3:

MOV a,31h;载入计次指针

xrla,#03h;是否按第4次?

jnzend4;不是则跳至end4

jbKEY,$;按第5次?

calldelay1;消除抖动

jnbKEY,$;放开否?

inc31h;计次地址(31h)加1

MOV 30h,#lowsong4;第5首歌指针

jmpnext

end4:

MOV a,31h;载入计次指针

xrla,#01h;是否按第5次?

jnzend5;不是则跳至end2

jbKEY,$;按第6次?

calldelay1;消除抖动

jnbKEY,$;放开否?

inc31h;计次地址(31h)加1

MOV 30h,#lowsong5;第6首歌指针

jmpnext

end5:

jmpstart;回到第1次位置

tim0:pushaCC;将a的值暂存于堆栈

pushpsw;将psw的值暂存于堆栈

setbrs0;设工作寄存器库1,rs0=1,rs1=0

clrrs1

MOV tl0,20h;重设计数值

MOV th0,21h

cplbuzzer;将p10位反相

clrrs0

poppsw;至堆栈取回psw的值

popacc;至堆栈取回a的值

reti;返回主程序

delay: MOV r7,#02;125秒

d2: MOV r4,#125

d3: MOV r3,#248

djnzr3,$

djnzr4,d3

djnzr7,d2

djnzr5,delay;决定节拍

ret

delay1: MOV r4,#20

d4: MOV r3,#248

djnzr3,$

djnzr4,d4

ret

org300h

table:

dw64260,64400,64524,64580

dw64684,64777,64820,64898

dw64968,65030,65058,65110

dw65157,65178,65217

song:;第一首歌哈巴狗

;1

db42h,42h,42h,52h,62h,04h

db62h,62h,62h,72h,84h,04h

db92h,92h,82h,72h,64h,04h

db82h,82h,52h,62h,44h,04h

;2

db42h,42h,42h,52h,62h,04h

db62h,62h,62h,72h,84h,04h

db92h,92h,82h,72h,64h,04h

db82h,82h,52h,62h,44h,04h

db00h

song1:;第2首歌生日快乐

;1

db82h,01h,81h,94h,84h

db0b4h,0a4h,04h

db82h,01h,81h,94h,84h

db0c4h,0b4h,04h

;2

db82h,01h,81h,0f4h,0d4h

db0b4h,0a4h,94h

db0e2h,01h,0e1h,0d4h,0b4h

db0c4h,0b4h,04h

db00h

song2:;第3首歌不倒翁

;1

db84h,94h,88h

db64h,54h,68h

db84h,64h,54h,44h

db52h,42h,52h,62h,48h

;2

db84h,94h,88h

db64h,54h,68h

db84h,64h,54h,44h

db52h,42h,52h,62h,48h

db00h

song3:;第4首歌妹妹背着洋娃娃

;1

db84h,02h,82h,64h,54h

db64h,54h,48h

db64h,02h,52h,44h,24h

db14h,24h,18h

;2

db24h,02h,22h,42h,24h

db44h,54h,68h

db54h,02h,52h,84h,84h

db54h,64h,48h

db00h

song4:;第5首歌两只老虎

;1

db44h,54h,64h,44h

db44h,54h,64h,44h

db64h,74h,88h

db64h,74h,88h

;2

db82h,92h,82h,72h,64h,44h

db82h,92h,82h,72h,64h,44h

db44h,84h,48h

db44h,14h,48h,00H

song5:;第6首歌三只小猫

;1

db62h,82h,82h,62h,98h

db92h,0b2h,0b2h,82h,98h

db62h,82h,82h,52h,68h

db92h,0b2h,0b2h,82h,98h

;2

db62h,82h,82h,62h,92h,92h,94h

db92h,0b2h,0b2h,92h,84h,94h

db0b8h,0b4h,04h

db00h

end

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