51单片机上实现7首简单音乐的汇编代码.doc

51单片机上实现7首简单音乐的汇编代码ORG 00HJMP STARTORG 0BHJMP TIM0START:MOV TMOD,#01H????? MOV IE,????? CLR TR0?????? MOV P2,#0FFH??????? MOV A,P2?????? MOV P2,#0FFH?????? RR A?????? RR A?????? RR A?????? ANL A,#0FH??????????? ;将选择的音乐号放入A?????? MOV 40H,A?????? JB P3.3,$??????????? ;P3.3 为起始信号 片选信号 START0:MOV 30H,#00HNEXT: MOV A,40H?????? JB P3.3,START?????? CJNE A,#00H,MUSIC1?????? MOV DPTR,#TABLE????????? ;生日快乐的TABLE?????? JMP CONMUSIC1: CJNE A,#01,MUSIC2?????? MOV DPTR,#TABLE1?????? JMP CONMUSIC2:CJNE A,#02,MUSIC3?????? MOV DPTR,#TABLE2?????? JMP CONMUSIC3:CJNE A,#03,MUSIC4?????? MOV DPTR,#TABLE3?????? JMP CONMUSIC4:CJNE A,#04,MUSIC5?????? MOV DPTR,#TABLE4?????? JMP CONMUSIC5:CJNE A,#05,MUSIC6?????? MOV DPTR,#TABLE5?????? JMP CONMUSIC6:CJNE A,#06,MUSIC7?????? MOV DPTR,#TABLE6?????? JMP CONMUSIC7:SETB P2.6?????? JMP START??????????????????????? ;共7首歌，这个时候不发音 CON:?? MOV A,30H?????? MOVC A,@A+DPTR?????? MOV R2,A?????? JZ END0?????? ANL A,#0FH?????? MOV R5,A?????? MOV A,R2?????? SWAP A?????? ANL A,#0FH?????? JNZ SING?????? CLR TR0?????? JMP D1SING: mov 50H,A?????? MOV A,40H?????? CJNE A,#00H,MODE1?????? MOV DPTR,#TABLE0?? ;TABLE1?????? JMP CONTMODE1: MOV DPTR,#TABLE01 CONT: MOV A,50H?????? DEC A?????? MOV 22H,A?????? RL A ?????? MOVC A,@A+DPTR?????? MOV TH0,A?????? MOV 21H,A?????? MOV A,22H?????? RL A?????? INC A?????? MOVC A,@A+DPTR?????? MOV TL0,A?????? MOV 20H,A?????? SETB TR0D1:??? CALL DELAY?????? ?????? INC 30H?????? JMP NEXTEND0: CLR TR0?????? JMP START0TIM0: PUSH ACC?????? PUSH PSW?????? MOV TL0,20H?????? MOV TH0,21H ?????? CPL P2.6 ?????? POP PSW?????? POP ACC?????? RETIDELAY: MOV R7,#02D2:??? MOV R4,#125D3:??? MOV R3,#248?????? ;JB P2.7,START?????? DJNZ R3,$?????? DJNZ R4,D3?????? DJNZ R7,D2?????? DJNZ R5,DELAY?????? RETTABLE0:?????? DW 64260,64400,64524,64580?????? DW 64684,64777,64820,64898?????? DW 64968,65030,65058,65110?????? DW 65157,65178,65217 TABLE01:?????? DW