【導(dǎo)讀】隨著信息技術(shù)革命的深入和計(jì)算機(jī)技術(shù)的飛速發(fā)展，單片機(jī)的應(yīng)用越來越廣泛，并逐漸發(fā)展成為一門關(guān)鍵的技術(shù)學(xué)科。在通信、家電、工業(yè)控制、儀器儀表、汽車等產(chǎn)品中都可以看到單片機(jī)的身影。國內(nèi)單片機(jī)的應(yīng)用仍以MCS-51系列為主。出優(yōu)美動(dòng)聽的音樂。用戶可以按照自己的喜好選擇音樂并將其轉(zhuǎn)化成機(jī)器碼存入單片。由于單片機(jī)的這種特殊的結(jié)構(gòu)形式，在某些應(yīng)。單片機(jī)的這種高性能、低價(jià)格是它最顯著的一個(gè)特點(diǎn)。要的儲存器，各種功能的I/O口都集成在一塊芯片內(nèi)，使之成為名副其實(shí)的單片機(jī)。片機(jī)尋址可達(dá)1MB和16MB。境易于采取屏蔽措施，適合在惡劣環(huán)境工作。極其豐富的轉(zhuǎn)移指令，I/O口的邏輯操作以及位處理器功能。及運(yùn)行速度均高于同一檔次的微型計(jì)算機(jī)。專用系統(tǒng)，主要由于這種系統(tǒng)有明顯的抗病菌侵害、抗電磁干擾等高可靠性能的保證。容，但震蕩器停止工作并禁止其它所有部件的工作直到下一個(gè)復(fù)位。P0口是一組8位漏極開路雙向I/O口，

　　

【正文】 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 TR0 SETB TR1 W1: LCALL DELAY30 INC 40H LCALL KS 。有鍵跳出 JNZ STOP LJMP NEXT20 。 STOP: CLR TR0 畢業(yè)設(shè)計(jì)論文 第 27 頁 共 31 頁 CLR TR1 LJMP MAIN0 。 TTM12: LCALL K2 MOV A,37H CJNE A,0EH,TTM13 CLR TR1 LCALL DELAY1 TTM120: LCALL KS LCALL DELAY1 JZ TTM120 LCALL K2 MOV A,37H CJNE A,0EH,TTM120 SETB TR1 LJMP NEXT20 TTM13: CJNE A,0CH,TTM14 MOV A,52H INC A MOV 52H,A MOV A,53H INC A MOV 53H,A MOV A,36H INC A MOV 37H A LJMP TTM2 TTM14: CJNE A,0DH,TTM2 MOV A,52H DEC A MOV 52H,A MOV A,53H DEC A MOV 53H,A MOV A,36H DEC A MOV 37H,A 。 TTM2: RET 。*************************************************** 畢業(yè)設(shè)計(jì)論文 第 28 頁 共 31 頁 。定時(shí)器中斷子程序 0 。*************************************************** TT0:PUSH ACC PUSH PSW MOV TL0,20H MOV TH0,21H CPL POP PSW POP ACC RETI 。*************************************************** 。定時(shí)器中斷子程序 1 。*************************************************** T1INT: MOV TH1, 3cH MOV TL1, 0b0H DJNZ L50MS,X4 MOV L50MS,20 。****************每秒種時(shí)鐘刷新秒顯示一次 SECSET: MOV A,SEC MOV B,10 DIV AB ADD A,30H MOV P0,0CEH 。顯示秒十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0CFH 。顯示秒個(gè)位 CALL ENABLE CALL WRITE2 MOV A,SEC INC A MOV SEC,A XRL A,60 X4: JNZ OUT MINSET: MOV SEC,00H 。*************************************每分鐘刷新分顯示一次 MOV A,MIN INC A MOV MIN,A MOV B,10 DIV AB 畢業(yè)設(shè)計(jì)論文 第 29 頁 共 31 頁 ADD A,30H MOV P0,0CBH 。顯示分十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0CCH 。顯示分個(gè)位 CALL ENABLE CALL WRITE2 MOV A,MIN MOV B,3 MUL AB MOV B,100 DIV AB MOV R2,A MOV A,10 XCH A,B DIV AB MOV A,MIN XRL A,60 JNZ OUT HOUSET: MOV MIN,00H 。**************************************每小時(shí)刷新小時(shí)顯示一次 MOV A,HOU MOV B,10 DIV AB ADD A,30H 。將 BCD 嗎轉(zhuǎn)化為 ASIIC 碼 MOV P0,0C8H 。顯示小時(shí)十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0C9H 。顯示小時(shí)個(gè)位 CALL ENABLE CALL WRITE2 MOV A,HOU INC A MOV HOU,A XRL A,10 JNZ OUT SJMP OVERFLOW OUT: RETI 。*************************************溢出處理 畢業(yè)設(shè)計(jì)論文 第 30 頁 共 31 頁 OVERFLOW: MOV L50MS,20 MOV L1MS,00H MOV L250MS,00H MOV SEC,00H MOV MIN,00H MOV HOU,00H RETI 。 DELAY30: MOV R7,2 W2: MOV R4,125 W3: MOV R3,248 DJNZ R3,$ DJNZ R4,W3 DJNZ R7,W2 DJNZ R1,DELAY30 RET 。 TABLE00: DW 64580,64684,64777,64820 DW 64898,64968,65030,64260 DW 64400,64524,65058,63835,64021 。 。第一首《精忠報(bào)國》 。 TABLE10: DB 66H,52H,36H,22H,12H,12H,22H,32H,98H,84H,82H,92H,14H,12H,22H DB 32H,52H,22H,42H,38H,66H,52H,36H,22H,12H,22H,22H,32H,98H DB 24H,22H,32H,54H,52H,32H,92H,12H,92H,82H,98H,66H,52H,36H,22H DB 12H,12H,22H,32H,98H,84H,82H,92H,14H,12H,22H,32H,52H,22H,42H,38H DB 66H,52H,36H,22H,12H,22H,22H,32H,98H,24H,22H,32H,54H,52H,32H DB 22H,12H,92H,82H,98H,14H,24H,34H,44H,64H,0B4H,64H,32H,52H DB 62H,0B2H,62H,52H,38H,24H,22H,32H,54H,52H,62H,52H,32H,32H,22H,38H DB 64H,0B4H,64H,32H,52H,62H,0B2H,62H,52H,38H,22H,22H,22H,32H,52H,52H DB 52H,62H,7FH,74H,04H,58H,6FH DB 00 。 。第二首《同一首歌》 。 畢業(yè)設(shè)計(jì)論文 第 31 頁 共 31 頁 TABLE40: DB 88h,14h,24h,36H,42H,34H,14H,28H,14H,94H DB 1fH,88H,14H,24H,34H,32H,42H,54H,14H DB 46H,32H,54H,22H,32H,32H,22H,2CH,38H,54H,74H DB 76H,62H,68H,54H,52H,62H,74H,62H,52H,3fH DB 46H,42H,54H,64H,54H,42H,32H,28H,0a4H,0a2H DB 92H,84H,94H,1fH,0b8H,68H,46H,52H,68H DB 74H,72H,72H,74H,62H,52H,3fH,0b8H,68H DB 46H,52H,68H,64H,62H,62H,64H,42H,32H,2fH DB 58H,14H,24H,36H,42H,34H,12H,12H,26H,22H,24H,22H,12H DB 94H,9cH,0a8H,0a6H,92H,84H,64H,54H,22H,22H,46H,42H,44H,32H,22H,5fH DB 00 。 。第 三 首 世上只有媽媽好 。 TABLE70: DB 66H,52H,34H,54H,0B4H,62H,52H,68H,34H,52H,62H,54H,34H,12H,92H,52H,32H,28H DB 26H,32H,54H,52H,62H,34H,24H,18H,56H,32H,22H,12H,92H,12H,8FH DB 66H,52H,34H,54H,0B4H,62H,52H,68H,34H,52H,62H,54H,34H,12H,92H,52H,32H,28H DB 26H,32H,54H,52H,62H,34H,24H,18H,56H,32H,22H,12H,92H,12H,8FH DB 66H,52H,34H,54H,0B4H,62H,52H,68H,34H,52H,62H,54H,34H,12H,92H,52H,32H,28H DB 26H,32H,54H,52H,62H,34H,24H,18H,56H,32H,22H,12H,92H,12H,8FH DB 00