music0.asm

单片机发声《五月桂花香》

ORG 0000H
LJMP START
ORG 000BH ;定时中断0入口

INC 20H ;中断服务程序,中断计数器加1
MOV TH0,#0D8H
MOV TL0,#0EFH ;12M晶振，形成10毫秒中断
RETI 

START: 
	   CLR P3.7
	   MOV P1,#00H
     MOV SP,#50H
     MOV TH0,#0D8H
     MOV TL0,#0EFH
     MOV TMOD,#01H
     MOV IE,#82H
  MUSIC0:
     NOP
     MOV DPTR,#DAT ;表头地址送DPTR
     MOV 20H,#00H ;中断计数器清0
     MOV B,#00H ;表序号清0
  MUSIC1:
     NOP
     CLR A
     MOVC A,@A+DPTR ;查表取代码
     JZ END0 ;是00H,则结束
     CJNE A,#0FFH,MUSIC5
     LJMP MUSIC3
  MUSIC5:
     NOP
     MOV R6,A
     INC DPTR
     MOV A,B
     MOVC A,@A+DPTR ;取节拍代码送R7
     MOV R7,A
     SETB TR0 ;启动计数
  MUSIC2: 
     NOP
     CPL P3.7
     MOV A,R6
     MOV R3,A
     CPL A
   ;  MOV P1,A ;显示(修改者加入的显示)
     CPL A
     LCALL DEL
     MOV A,R7
     CJNE A,20H,MUSIC2 ;中断计数器(20H)=R7否?
     ;不等,则继续循环
     MOV 20H,#00H ;等于,则取下一代码
     INC DPTR
     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 ;歌曲结束,延时1秒后继续
     MUSIC6:
     MOV R3,#00H
     LCALL DEL
     DJNZ R2,MUSIC6
     LJMP MUSIC0
  DEL:
     NOP
    DEL3: 
     MOV R4,#05H
    DEL4: 
     NOP
     DJNZ R4,DEL4
     NOP
     DJNZ R3,DEL3
     RET
     
  DAT: 
     DB 18H, 30H, 1CH, 10H
     DB 20H, 40H, 1CH, 10H 
     DB 18H, 10H, 20H, 10H
     DB 1CH, 10H, 18H, 40H
     DB 1CH, 20H, 20H, 20H
     DB 1CH, 20H, 18H, 20H 
     DB 20H, 80H, 0FFH,20H
     DB 30H, 1CH, 10H, 18H
     DB 20H, 15H, 20H, 1CH
     DB 20H, 20H, 20H, 26H
     DB 40H, 20H, 20H, 2BH
     DB 20H, 26H, 20H, 20H 
     DB 20H, 30H, 80H, 0FFH
     DB 20H, 20H, 1CH, 10H
     DB 18H, 10H, 20H, 20H
     DB 26H, 20H, 2BH, 20H
     DB 30H, 20H, 2BH, 40H
     DB 20H, 20H, 1CH, 10H
     DB 18H, 10H, 20H, 20H
     DB 26H, 20H, 2BH, 20H
     DB 30H, 20H, 2BH, 40H
     DB 20H, 30H, 1CH, 10H
     DB 18H, 20H, 15H, 20H
     DB 1CH, 20H, 20H, 20H
     DB 26H, 40H, 20H, 20H 
     DB 2BH, 20H, 26H, 20H 
     DB 20H, 20H, 30H, 80H
     DB 20H, 30H, 1CH, 10H
     DB 20H, 10H, 1CH, 10H
     DB 20H, 20H, 26H, 20H
     DB 2BH, 20H, 30H, 20H
     DB 2BH, 40H, 20H, 15H
     DB 1FH, 05H, 20H, 10H
     DB 1CH, 10H, 20H, 20H
     DB 26H, 20H, 2BH, 20H
     DB 30H, 20H, 2BH, 40H
     DB 20H, 30H, 1CH, 10H
     DB 18H, 20H, 15H, 20H
     DB 1CH, 20H, 20H, 20H
     DB 26H, 40H, 20H, 20H
     DB 2BH, 20H, 26H, 20H
     DB 20H, 20H, 30H, 30H 
     DB 20H, 30H, 1CH, 10H
     DB 18H, 40H, 1CH, 20H
     DB 20H, 20H, 26H, 40H
     DB 13H, 60H, 18H, 20H
     DB 15H, 40H, 13H, 40H
     DB 18H, 80H, 00H
     end