微机原理课设-模拟电风扇工作

第3章结果测试及分析3.1结果测试编译并连接程序，然后全速运行，在数码管上就显示计时器的时间，开始时是全0。此时单色发光二极管为全灭。将开关K1向上扳去，此时8255的PA0口输入高电平，PB口输出使单色发光二极管循环亮灯。即以一定的速度循环点亮八个灯，模拟出了电风扇的转动。当需要改变风速时，只需按下键盘上的A、B、C键，便可切换风速。当需要设定运行时间时，只需要按下D键，则进入定时状态，接着只需按下键盘上的数字键，设定好定时的时间，然后再按下D键，风扇就将在设定的时间内转动，并且在数码管上显示时间的变化，以一秒为单位逐渐减少，当减到0时，风扇就将停止转动，单色灯全灭,如此便实现了定时功能。如要让单色灯再亮，则需将总开关关掉再打开。结果分析开始运行时，发现单色发光二极管并不是按理想顺序逐渐点亮红色，而是与风扇转动方向相反，检查硬件连线却并没有发现错误，后来，检查程序时发现将循环右移的代码写错了，从而导致了与旋转方向相反的循环点亮顺序，改正后完美运行。风扇正常运行了，但是在定时时发现数码管上的时间变化过于缓慢，于是检查8253芯片的初始化程序，发现CLK1的输入时倍数太大，于是将其数值调小后运行，发现时间变化回归正常。实验结果总的来说基本实现了课设的要求，虽然有些小问题和还会有些不稳定，这些问题我会在以后的不断学习中进行完善。沈阳航空航天大学课程设计报告参考文献参考文献[1]王爱英.计算机组成与设计[M]北京：教育出版社，2003[2]杨素行.微型计算机系统原理及应用[M]北京:清华大学出版社，1996[3]张雪兰.汇编语言程序设计[M]北京:清华大学出版社，2006[4]龚尚福.微机原理与接口技术[M]西安:西安电子科技大学出版社，2003[5]王中民.微型计算机原理[M]西安:西安电子科技大学出版社，2003[6]沈美明，温冬婵.IBM-PC汇编语言程序设计[M]北京:清华大学出版社，2001沈阳航空航天大学课程设计报告附录附录程序清单：datasegmentisenddb0n0db0n1db0n2db0isrightdb1keykinddb0oldkeydb0kinddb0isstopdb0flagsdb0numbersdb3fh,6,5bh,0,0,0,0,0,0,0dataendscodesegmentassumecs:code,ds:datamain:；主程序climovax,csmovds,axmovkind,0movisright,1movkeykind,0ahmovoldkey,0ahmovkind,0movisstop,0movflags,0movisend,0movn0,0movn1,0movn2,0callinitnumberscallinit8255callinit8259callinit8253callmodifyintmovdx,212hmoval,0outdx,alcallcleardevicecalldisplaymoval,0movdx,22ahoutdx,almoval,30houtdx,almoval,7fhstidowhat:pushaxdowait:moval,0ffh；单色灯清零movdx,211houtdx,almovdx,210hinal,dxtestal,1；判断开关jzdowaitpopaxcallreadakeycmpkeykind,0ahjnza1movkind,2callgotonextjmpaaa1:；判断风速改变cmpkeykind,0bhjnza2movkind,1callgotonextjmpaaa2:cmpkeykind,0chjnza3movkind,0callgotonextjmpaaa3:cmpkeykind,0dhjnza4pushaxmovdx,212hmoval,0outdx,alpopaxmovisstop,0pushaxmoval,oldkeymovkeykind,alcallreadingmovdx,212hmoval,0ffhoutdx,alpopaxstijmpaaa4:cmpkeykind,0ehjnzaanotflagspushaxmoval,oldkeymovkeykind,alpopaxaa:jmpdowhatgotonext:；单色灯循环亮灭movdx,211houtdx,alcmpflags,0jnznororroral,1noror:cmpal,0fehjnzcontinuejmpcontinuecontinue:cmpkind,2jnzmm1callspeed2jmpmm3mm1:；改变风速cmpkind,1jnzmm2callspeed1jmpmm3mm2:cmpkind,0jnzmm3callspeed0mm3:pushaxmm33:cmpisstop,0jzmm4movdx,211hmoval,0ffhoutdx,almovdx,210hinal,dxtestal,1jnzmm33movisstop,0climm4:popaxretreadakey:；读取键盘输入pushaxmoval,keykindmovoldkey,almovdx,22ahinal,dxandal,0fhcmpal,0jzgotoexitmoval,40hmovdx,22ahoutdx,almovdx,228hinal,dxmovkeykind,algotoexit:popaxretspeed1:；速度设置pushcxmovcx,18000sp1:loopsp1popcxretspeed2:pushcxmovcx,50000sp2:loopsp2popcxretspeed0:pushcxmovcx,8000sp0:loopsp0popcxretreadisd:key:movdx,22ahinal,dxandal,0fhcmpal,0jzkeymoval,40houtdx,almovdx,228hinal,dxcmpal,0dhjnzkeyretreading:；输入时间pushaxmovn0,0movn1,0movn2,0callreadanumbermovn0,alcalldisplaycallreadanumbercmpal,0dhjzreadexitmovah,n0movn0,almovn1,ahcalldisplaycallreadanumbercmpal,0dhjzreadexitmovah,n0movn0,almoval,n1movn1,ahmovn2,alcalldisplaycallreadisdreadexit:popaxretreadanumber:key2:movdx,22ahinal,dxandal,0fhcmpal,0jzkey2moval,40houtdx,almovdx,228hinal,dxretinitnumbers:pushbxmovbx,offsetnumbersmovbyteptr[bx],3fhmovbyteptr[bx+1],6movbyteptr[bx+2],5bhmovbyteptr[bx+3],4fhmovbyteptr[bx+4],66hmovbyteptr[bx+5],6dhmovbyteptr[bx+6],7dhmovbyteptr[bx+7],7movbyteptr[bx+8],7fhmovbyteptr[bx+9],6fhpopbxretdisplay:；时间显示callcleardevicemovbx,offsetnumbersmoval,80hmovdx,22ahoutdx,almoval,n0xorah,ahaddbx,axmoval,[bx]movdx,228houtdx,almovbx,offsetnumbersmoval,81hmovdx,22ahoutdx,almovdx,228hmoval,n1xorah,ahaddbx,axmoval,[bx]outdx,almovbx,offsetnumbersmoval,82hmovdx,22ahoutdx,almovdx,228hmoval,n2xorah,ahaddbx,axmoval,[bx]outdx,alretintcount:pushaxpushbxpushdxcmpn0,0jznext1decn0jmpnext4next1:movn0,9cmpn1,0jznext2decn1jmpnext4next2:movn1,9cmpn2,0jznext3decn2jmpnext4next3:movn2,9next4:cmpn0,0jnznext5cmpn1,0jnznext5cmpn2,0jnznext5movisstop,1movdx,212hmoval,0outdx,alnext5:calldisplaypopdxpopbxpopaxiretinit8255:moval,90hmovdx,213houtdx,alretinit8259:moval,13hmovdx,220houtdx,almovdx,221hmoval,30houtdx,almoval,3outdx,almoval,0fehoutdx,alretmodifyint:pushdspushbxpushaxxorax,axmovds,axmovbx,30h*4movax,offsetintcountmov[bx],axmovax,8100hmov[bx+2],axpopaxpopbxpopdsretinit8253:pushaxmoval,35hmovdx,203houtdx,almovax,0ffffhmovdx,200houtdx,almoval,ahoutdx,almoval,75hmovdx,203houtdx,almovax,27movdx,201houtdx,almoval,ahoutdx,alpopaxretcleardevice:pushaxpushdxmoval,0c1hmovdx,22ahoutdx,