;                                                                             	*
 ;                          			                          	*
 ;              蜂鳴器唱《祝你平安》                                          	*	
 ;                                                                             	*
;********************************************************************************/
SPK	bit	P2.3

	ORG 0000H
	LJMP START
	ORG 000BH
	INC 20H ;中斷服務,中斷計數器加1
	MOV TH0,#0D8H
	MOV TL0,#0EFH ;12M晶振，形成10毫秒中斷
	RETI

START: 
	MOV SP,#50H
	MOV TH0,#0D8H
	MOV TL0,#0EFH
	MOV TMOD,#01H
	MOV IE,#82H
MUSIC0:
	NOP
	MOV DPTR,#DAT ;表頭地址送DPTR
	MOV 20H,#00H ;中斷計數器清0
	MOV B,#00H ;表序號清0
MUSIC1:
	NOP
	CLR A
	MOVC A,@A+DPTR ;查表取代碼
	JZ END0 ;是00H,則結束
	CJNE A,#0FFH,MUSIC5
	LJMP MUSIC3
MUSIC5:
	NOP
	MOV R6,A
	INC DPTR
	MOV A,B
	MOVC A,@A+DPTR ;取節拍代碼送R7
	MOV R7,A
	SETB TR0 ;啟動計數
MUSIC2:
	NOP
	CPL SPK
	MOV A,R6
	MOV R3,A
	LCALL DEL
	MOV A,R7
	CJNE A,20H,MUSIC2 ;中斷計數器(20H)=R7否?
;不等,則繼續循環
	MOV 20H,#00H ;等于,則取下一代碼
	INC DPTR
; INC B
	LJMP MUSIC1
MUSIC3:
	NOP
	CLR TR0 ;休止100毫秒
	MOV R2,#0DH
MUSIC4:
	NOP
	MOV R3,#0FFH
	LCALL DEL
	DJNZ R2,MUSIC4
	INC DPTR
	LJMP MUSIC1
END0:
	NOP
	MOV R2,#64H ;歌曲結束,延時1秒后繼續
MUSIC6:
	MOV R3,#00H
	LCALL DEL
	DJNZ R2,MUSIC6
	LJMP MUSIC0
DEL:
	NOP
DEL3: 
	MOV R4,#02H
DEL4: 
	NOP
	DJNZ R4,DEL4
	NOP
	DJNZ R3,DEL3
	RET
	NOP
DAT:
db 26h,20h,20h,20h,20h,20h,26h,10h,20h,10h,20h,80h,26h,20h,30h,20h
db 30h,20h,39h,10h,30h,10h,30h,80h,26h,20h,20h,20h,20h,20h,1ch,20h
db 20h,80h,2bh,20h,26h,20h,20h,20h,2bh,10h,26h,10h,2bh,80h,26h,20h
db 30h,20h,30h,20h,39h,10h,26h,10h,26h,60h,40h,10h,39h,10h,26h,20h
db 30h,20h,30h,20h,39h,10h,26h,10h,26h,80h,26h,20h,2bh,10h,2bh,10h
db 2bh,20h,30h,10h,39h,10h,26h,10h,2bh,10h,2bh,20h,2bh,40h,40h,20h
db 20h,10h,20h,10h,2bh,10h,26h,30h,30h,80h,18h,20h,18h,20h,26h,20h
db 20h,20h,20h,40h,26h,20h,2bh,20h,30h,20h,30h,20h,1ch,20h,20h,20h
db 20h,80h,1ch,20h,1ch,20h,1ch,20h,30h,20h,30h,60h,39h,10h,30h,10h
db 20h,20h,2bh,10h,26h,10h,2bh,10h,26h,10h,26h,10h,2bh,10h,2bh,80h
db 18h,20h,18h,20h,26h,20h,20h,20h,20h,60h,26h,10h,2bh,20h,30h,20h
db 30h,20h,1ch,20h,20h,20h,20h,80h,26h,20h,30h,10h,30h,10h,30h,20h
db 39h,20h,26h,10h,2bh,10h,2bh,20h,2bh,40h,40h,10h,40h,10h,20h,10h
db 20h,10h,2bh,10h,26h,30h,30h,80h,00H

	END