📄 p3.3小喇叭---生日快乐.0.htm
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align=left>;P3.3小喇叭---生日快乐。<BR>;***************************************************************************<BR>;*
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<BR>ORG 0000H<BR>LJMP START<BR>ORG 000BH<BR>INC 20H ;中断服务,中断计数器加1<BR>MOV
TH0,#0D8H<BR>MOV TL0,#0EFH ;12M晶振，形成10毫秒中断<BR>RETI<BR>START: <BR>MOV
SP,#50H<BR>MOV TH0,#0D8H<BR>MOV TL0,#0EFH<BR>MOV TMOD,#01H<BR>MOV
IE,#82H<BR>MUSIC0:<BR>NOP<BR>MOV DPTR,#DAT ;表头地址送DPTR<BR>MOV 20H,#00H
;中断计数器清0<BR>MOV B,#00H ;表序号清0<BR>MUSIC1:<BR>NOP<BR>CLR A<BR>MOVC A,@A+DPTR
;查表取代码<BR>JZ END0 ;是00H,则结束<BR>CJNE A,#0FFH,MUSIC5<BR>LJMP
MUSIC3<BR>MUSIC5:<BR>NOP<BR>MOV R6,A<BR>INC DPTR<BR>MOV A,B<BR>MOVC
A,@A+DPTR ;取节拍代码送R7<BR>MOV R7,A<BR>SETB TR0 ;启动计数<BR>MUSIC2:<BR>NOP<BR>CPL
P3.3<BR>MOV A,R6<BR>MOV R3,A<BR>LCALL DEL<BR>MOV A,R7<BR>CJNE A,20H,MUSIC2
;中断计数器(20H)=R7否?<BR>;不等,则继续循环<BR>MOV 20H,#00H ;等于,则取下一代码<BR>INC DPTR<BR>;
INC B<BR>LJMP MUSIC1<BR>MUSIC3:<BR>NOP<BR>CLR TR0 ;休止100毫秒<BR>MOV
R2,#0DH<BR>MUSIC4:<BR>NOP<BR>MOV R3,#0FFH<BR>LCALL DEL<BR>DJNZ
R2,MUSIC4<BR>INC DPTR<BR>LJMP MUSIC1<BR>END0:<BR>NOP<BR>MOV R2,#64H
;歌曲结束,延时1秒后继续<BR>MUSIC6:<BR>MOV R3,#00H<BR>LCALL DEL<BR>DJNZ
R2,MUSIC6<BR>LJMP MUSIC0<BR>DEL:<BR>NOP<BR>DEL3: <BR>MOV
R4,#02H<BR>DEL4: <BR>NOP<BR>DJNZ R4,DEL4<BR>NOP<BR>DJNZ
R3,DEL3<BR>RET<BR>NOP<BR>DAT:<BR>db
26h,20h,20h,20h,20h,20h,26h,10h,20h,10h,20h,80h,26h,20h,30h,20h<BR>db
30h,20h,39h,10h,30h,10h,30h,80h,26h,20h,20h,20h,20h,20h,1ch,20h<BR>db
20h,80h,2bh,20h,26h,20h,20h,20h,2bh,10h,26h,10h,2bh,80h,26h,20h<BR>db
30h,20h,30h,20h,39h,10h,26h,10h,26h,60h,40h,10h,39h,10h,26h,20h<BR>db
30h,20h,30h,20h,39h,10h,26h,10h,26h,80h,26h,20h,2bh,10h,2bh,10h<BR>db
2bh,20h,30h,10h,39h,10h,26h,10h,2bh,10h,2bh,20h,2bh,40h,40h,20h<BR>db
20h,10h,20h,10h,2bh,10h,26h,30h,30h,80h,18h,20h,18h,20h,26h,20h<BR>db
20h,20h,20h,40h,26h,20h,2bh,20h,30h,20h,30h,20h,1ch,20h,20h,20h<BR>db
20h,80h,1ch,20h,1ch,20h,1ch,20h,30h,20h,30h,60h,39h,10h,30h,10h<BR>db
20h,20h,2bh,10h,26h,10h,2bh,10h,26h,10h,26h,10h,2bh,10h,2bh,80h<BR>db
18h,20h,18h,20h,26h,20h,20h,20h,20h,60h,26h,10h,2bh,20h,30h,20h<BR>db
30h,20h,1ch,20h,20h,20h,20h,80h,26h,20h,30h,10h,30h,10h,30h,20h<BR>db
39h,20h,26h,10h,2bh,10h,2bh,20h,2bh,40h,40h,10h,40h,10h,20h,10h<BR>db
20h,10h,2bh,10h,26h,30h,30h,80h,00H<BR><BR>END
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