微机原理课程设计-电子钟标准版-课程设计.doc

微机原理课程设计-电子钟标准版-课程设计微机原理课程设计-电子钟标准版|精品课程网站设计|课程设计网报告总结心得电子钟标准版.486pcodesegmentuse16assumecs:codeORG03000HBEG:jmpstarttabdb0c0h,0f9h,0a4h,0b0h,099h,092h,082h,0f8h,080h,090h,088h,083h,0c6h,0a1h,086h,08ehporta1equ200hportb1equ204hportc1equ208hportp1equ20chporta2equ201hportb2equ205hportc2equ209hportp2equ20dhporta3equ202hportb3equ206hportc3equ20ahportp3equ20ehporta4equ203hportb4equ207hportc4equ20bhportp4equ20fhhourdw23mindw59secdw50countdb0c10db10BITEQU10111111BPORT2EQU360HPORT1EQU340HROWDB01H,02H,04H,08Hstepdb0timedw0stopdw0ffhstart:movax,0movds,ax;关中断cli;8255初始化moval,80h；A口方式0，输出；B口方式0；C口输出movdx,20ehoutdx,almovdx,20dhoutdx,almovdx,20choutdx,axmoval,80hmovdx,20fhoutdx,almovdx,portb4;203h口moval,0ffhoutdx,al;8253out0产生25ms信号movdx,30ch；8255CS接300hmoval,00110100b;计数器0，读写低八位，方式2，2进制outdx,almoval,01110110b;计数器1，读写低八位，方式3，2进制outdx,almovax,37500;初值movdx,300h;计数器0outdx,almoval,ahoutdx,al;8253out1产生25MS方波movdx,30chmovax,47000;movdx,304h；计数器1/308outdx,almoval,ahoutdx,al;中断向量设置movax,offsetinterupt;中断程序的入口地址movbx,20hmovbx,axmovax,csmovbx+2,ax;/?;8259initmovdx,3a0hmoval,00010011b;ICW1outdx,almovdx,3a8hmoval,00001000b;IR0的中断类型号08HICW2;movdx,3a8houtdx,almoval,00000101b;ICW4/00000001outdx,al;写屏蔽字moval,11111110b;只有IRQ0允许movdx,3a8houtdx,alaga:sti;开中断;输入程序WT:MOVAL,00HMOVDX,PORT2OUTDX,AL;使数码管全灭的同时，列线输出0判断是否有键按下MOVDX,PORT2；360H地址INAL,DX;是否有键按下NOTALANDAL,0FHJNZLK1;有，转JMPWT;无键，继续查询等待LK1:CALLDELYMOVAL,00HMOVDX,PORT2OUTDX,AL;再次确认是否有键按下MOVDX,PORT2INAL,DXNOTALANDAL,0FHJZWTMOVCL,00H;有键,识别按键,CL为列计数器MOVBL,0feH;第0列LK4:MOVAL,BLMOVDX,PORT2OUTDX,ALMOVDX,PORT2INAL,DXNOTALANDAL,0FH;结果为行值JNZKEYDOWN;此列有键按下，计算键值NEXT:INCCL;扫描下一列TESTBL,08HJZWTROLBL,1JMPLK4 KEYDOWN:MOVBX,0CMPROW:CMPAL,ROWBXJZKEY/stopINCBXJMPCMPROWKEY:IMULBX,3movah,0ADDCL,BLmoval,clcmpal,10jnzgoto1cmpstop,0jnzp1movstop,1jmpgoto2p1:movstop,0jmpgoto2goto1:cmpal,11jnzgoto2movstop,0movstep,1aga1:callinputcmpstep,1jacmp2movax,timeimulax,10movhour,axincstepjmpaga1cmp2:cmpstep,2jacmp3movax,timeaddhour,axincstepjmpaga1cmp3:cmpstep,3jacmp4movax,timeimulax,10movmin,axincstepjmpaga1cmp4:cmpstep,4jacmp5movax,timeaddmin,axincstepjmpaga1cmp5:movstep,0movstop,1goto2:jmpaga；/中断程序interuptprocfarpushaxpushbxpushcxpushdxleabx,tab;显示秒movcx,secmovax,cxdivc10movdx,porta3pushaxmovah,0xlatoutdx,alpopaxmovdx,portb3moval,0xchgah,alxlatoutdx,al;分钟movcx,minmovax,cxdivc10movdx,porta2pushaxmovah,0xlatoutdx,alpopaxmovdx,portb2moval,0xchgah,alxlatoutdx,al;小时movcx,hourmovax,cxdivc10movdx,porta1pushaxmovah,0xlatoutdx,alpopaxmovdx,portb1moval,0xchgah,alxlatoutdx,alcmpstop,0jzexitcmphour,24jlaamovhour,0aa:cmpmin,60jlbbmovmin,0bb:inccount;响铃时间为0.5秒cmpcount,20jlexitmoval,0ffhmovdx,portb4outdx,alcmpcount,40jlexitmovcount,0incseccmpmin,59jlskipcmpsec,55jlexit moval,00hmovdx,portb4outdx,alskip:cmpsec,60jlexitmovsec,0incmincmpmin,60jlexitmovmin,0moval,0ffhmovdx,portb4outdx,alinchourcmphour,24jlexitmovhour,0exit:moval,00100000b;中断结束EOImovdx,3a0houtdx,alpopdxpopcxpopbxpopaxiretinteruptendpDELYprocPUSHCXMOVCX,0ffffHLOOP$POPCXREtdelyendp;/键盘inputprocpushaxpushbxpushcxpushdxwt1:MOVAL,00HMOVDX,PORT2OUTDX,AL;使数码管全灭的同时，列线输出0判断是否有键按下MOVDX,PORT2INAL,DX;是否有键按下NOTALANDAL,0FHJNZlk11;有，转JMPwt1;无键，继续查询等待lk11:CALLDELYMOVAL,00HMOVDX,PORT2OUTDX,AL;再次确认是否有键按下MOVDX,PORT2INAL,DXNOTALANDAL,0FHJZwt1MOVCL,00H;有键,识别按键,CL为列计数器MOVBL,0feH;第0列lk44:MOVAL,BLMOVDX,PORT2OUTDX,ALMOVDX,PORT2INAL,DXNOTALANDAL,0FH;结果为行值JNZKEYDOWN1;此列有键按下，计算键值next1:INCCL;扫描下一列TESTBL,08HJZwt1RO