【正文】 清零 ACALL DIANGE 。先將鍵盤的列全部置為高電平 MOV A,P2 XRL A,0FFH CJNE A,00H,NNEQ 。有按鍵按下即跳到 NNEQ LCALL DELY10MS 。判斷是否按下 1 鍵 CJNE A,0FEH,NNK2 。轉(zhuǎn)向歌曲播放程序 NNK2: CJNE A,0FDH,NNK3 。轉(zhuǎn)向歌曲播放程序 NNK3: CJNE A,0FBH,NNK4 。轉(zhuǎn)向歌曲播放程序 NNK4: CJNE A,0F7H,NNK5 。轉(zhuǎn)向歌曲播放程序 NNK5: CJNE A,0EFH,NNK6 。轉(zhuǎn)向歌曲播放程序 NNK6: 河南理工大學(xué)本科課程設(shè)計(jì)報(bào)告 15 CJNE A,0DFH,NNK7 。轉(zhuǎn)向歌曲播放程序 NNK7: CJNE A,0BFH,NNK08 。轉(zhuǎn)向歌曲播放程序 NNK08: CJNE A,07FH,DIANGE 。判斷鍵有沒有松開 , LCALL DELY10MS 。********歌曲播放程序 ********** MUSIC: NEXT20: MOV A,40H MOVC A,A+DPTR MOV R2,A 。延時(shí)時(shí)間送 R1 MOV A,R2 SWAP A ANL A,0FH 。轉(zhuǎn)向 W1 。初始值為雙字節(jié)，偏移地址乘以 2 PUSH DPL 河南理工大學(xué)本科課程設(shè)計(jì)報(bào)告 16 PUSH DPH 。保存頻率初始值高八位 MOV STH0,A 。偏移地址加一指向初始值低八位 MOVC A,A+DPTR 。裝頻率初始值低八位 SETB TR0 。節(jié)拍加一 LJMP MUSIC 。轉(zhuǎn)向點(diǎn)歌程序 。 取反 RETI 。倒計(jì)時(shí) 3 秒顯示碼 TABLE1: DW 65058,65110,65157,65178 。音樂播放頻率表 DW 64898,64968,65030,64260 DW 64400,64524,65058,63835,64021 。 。第三首《兩只蝴蝶》 。 TABLE40: DB 82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24H DB 22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32H DB 22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,94H,1cH DB 82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24H DB 22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32H DB 22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,22H,12H,1cH,32H,52H DB 62H,64H,62H,64H,0b2H,62H,52H,54H,62H,54H,32H,22H DB 12H,14H,12H,14H,24H,3cH,32H,22H,12H,14H,12H,14H,0b2H,62H,52H,54H,62H,54H,32H,52H DB 66H,0b2H,0b4H,62H,52H,5cH,32H,52H,62H,64H,62H,64H,0b2H,62H,52H,54H DB 62H,54H,32H,22H,12H,14H,12H,14H,54H,3cH,32H,22H,12H,14H,12H,14H,22H,32H DB 52H,54H,32H,54H,32H,52H,6fH,04H,02H,92H,32H,24H,12H,1fH DB 00H 。 。第七首《同一首歌》 。 TABLE60: DB 02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H,24H,21H,0A1H,11H,0A1H DB 9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,11H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB 02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 72H,62H,68H,02H,61H,51H,66H,62H,58H,0CH,02H,51H,41H,5FH DB 02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H,24H,21H,0A1H,11H,0A1H DB 9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,11H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB 02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 66H,62H,54H,0B2H,71H,61H,6CH DB 00H 。第五首 世上只有媽媽好 。 。 TABLE20: DB 02H,82H DB 16H,32H,54H,02H,52H DB 0A6H,32H,54H,02H,52H DB 64H,74H,0B6H,64H DB 52H,5CH,32H,22H DB 16H,12H,14H,32H,22H DB 16H,12H,14H,22H,32H DB 26H,12H,94H,22H,32H DB 2CH DB 32H,52H DB 36H,22H,14H,54H DB 0ACH,92H,0A2H DB 96H,0A2H,96H,82H DB 3CH,54H DB 36H,22H,14H,54H DB 0ACH,92H,0A2H DB 16H,12H,14H,22H,32H DB 2CH,02H,82H DB 16H,32H,56H,12H DB 0A6H,32H,56H,52H DB 66H,72H,0B6H,62H DB 62H,52H,58H,32H,22H DB 16H,12H,14H,32H,22H DB 16H,12H,14H,22H,32H DB 26H,92H,0A4H,12H,22H DB 1CH DB 00H 。第一首《精忠報(bào)國(guó)》 。中音 DW 64898,64968,65030,65058 TABLE3: DW 63628,63835,64021,64103 。********延時(shí) 1s 子程序 ******** DELAY0: MOV R7,50 DELA: MOV R6,100 DEL12: MOV R5,100 DJNZ R5,$ DJNZ R6,DEL12 DJNZ R7,DELA RET 。*******T0 中斷服務(wù)子程序 ********** INT_T0: MOV TH0,STH0 MOV TL0,STL0 。 STOP: CLR TR0 。句間暫停，蜂鳴器不發(fā)聲 LCALL DELAY30 ?；謴?fù) DPTR 的值 MOV TL0,A 。取偏移地址 RL A 。DPTR 指向頻率初始值表 MOVC A,A+DPTR 。高四位減一得到頻率初始值偏移地址 MOV 22H,A 。高四位不為零轉(zhuǎn)向 SING CLR TR0 。為零歌結(jié)束 ANL A,0FH 。鍵釋放讓 LED 顯示為 8 LJMP START 。*********判斷功能切換鍵釋放 ******* SHIFANG: