微机原理上机实验(六+十)实验报告 74HC138译码器实验 16x16点阵显示实验

1、微机原理上机实验报告实验六：74HC138译码器实验实验十：LED16x16点阵显示实验微机原理上机实验（六）实验报告实验六：74HC138译码器实验实验目的1、掌握74HC138译码器的工作原理，熟悉74HC138译码器的具体运用连接方法，了解74HC138是如何译码的。2、认真预习本节实验内容，尝试自行编写程序，填写实验报告实验内容1、编写程序：使用8255的PCO、PC1、PC2控制74HC138的数据输入端，通过译码产生8选1个选通信号，轮流点亮8个LED指示灯。2、运行程序，验证译码的正确性。实验原理图(8255)PC(&255)PC0(&255)PC1；>-(

2、1)VCC-：JSN74HCBSM四、实验步骤1、连线说明：F7区：A、B、CD3区：PCO、PC1、PC2F7区：G1、G2A、G2BC1区：VCC、GND、GNDF7区：JP63F4区：JP18（LED指示灯）D3区：CS、AO、A1A3区：CS1、AO、A12、调试程序，查看运行结果是否正确五、实验代码Con_8255EQUO273H;8255控制口PC_8255EQUO272H;8255PC口_STACKSEGMENTSTACK;设置堆栈段DW1OODUP(?)_STACKENDSCODESEGMENTSTARTPROCNEARASSUMECS:CODE,SS:STACKMOVDX,C

3、on_8255MOVAL,80HOUTDX,AL;8255初始化，PC口作输出用，向8255的控制口输入置位/复位控制字10000000B,PCOPC7全部复位MOVDX,PC_8255MOVAL,0START1:OUTDX,AL将00000000B输入8255的PC口CALLDelay延时INCALAL加一JMPSTART1循环DelayPROCNEAR;延时Delay1:XORCX,CX；CX清零LOOP$当前位置循环一次后推出RETDelayENDPSTARTENDPCODEENDSENDSTART六、实验思考题CODESEGMENT1. 在应用系统中，74HC138通常用来产生片选信号

4、，请读者考虑一下，应如何处理？将输入信号转换为三位无符号二进制数，将转换后的数据由低到高分别输入74HC138的A、B、C口，即可实现对最多8的模块的片选功能。2. 绘制本实验的详细实验电路图。(S2551PC0；'：:'(8255)PC1(C1)GND-(S255jPC2AcGlcrcrii>(C1)VCC；r-SN74HCB3N3. 使用8255的PC口读入开关信号，实现编码控制8个LED灯的开关本拓展实验的电路图在上个实验的基础上稍作修改74CH138的G1、G2A、G2B分别接入PC3、PC4、PC5，其余接口接线不变，当开关4为开启时，控制信号有效Con_825

5、5PC_8255PA_8255_STACKEQUEQUEQUSEGMENT0273H0272H0270HSTACKDW100DUP(?)STACKENDSSTARTPROCNEARASSUMECS:CODE,SS:_STACKMOVDX,Con_8255MOVAL,10010000BOUTDX,AL;向8255的控制口输入控制字PA口方式0输入其余口作为输出START1:MOVDX,PA_8255INAL,DX;从PA口读入开关当前状态MOVDX,PC_8255OUTDX,AL;将PA口读入的开关状态由PC口输出，以控制LED灯的亮灭JMPSTART1循环执行，不断地由PA口读入开关状态STA

6、RTENDPCODEENDSENDSTART微机原理上机实验（十）实验报告实验十：LED16x16点阵显示实验实验目的1、熟悉8255的功能，了解点阵显示的原理及控制方法；2、学会使用LED点阵，通过编程显示不同字符；3、认真预习本节实验内容，可尝试自行编写程序，做好实验准备工作，填写实验报告。实验内容1、编写程序，用B4区的二片74HC273控制16X16点阵的行；8255的PA、PB口控制16X16点阵的列；显示字符。2、按图连接线路；运行程序，观察实验结果，学会编程控制LED点阵显示字符。实验原理图lrSiL寸b9S3<<<!<<<!<<U

7、25SN74LS244NEEPg卜MiIslUNOMvSN74LS244NEm寸刁P卜Mi7"If両.w二AL22AiY3A4Y4A5Y5A6Y6A7Y7ASY8S.'.-!.：<INGNDmo0C13076r-<.-9!cfzGr-i95、o匸Th!-01心014话oTT0E1OE2VCCVYA2Y2緘Y.:A4：/!；AbY6A7Y7ASY8SN7LS24NGNDlZIF50卜MR7s142LG7O8fiBH12115LG708SBHLED3LED4四、实验步骤1、连线说明：D3区：CS（8255）AO、A1A3区：CS1、AO、A1D3区：JP23(PA)、

8、JP20(PB)A2区：JP21、JP22（列输出线）B4区：JP57(D0.D7)A3区：JP42(D0.D7)B4区：JP56(D8.D15)A3区：JP40(D8.D15)B4(l/0)区：CS273、BLE、BHEA3区：CS5、BLE、BHEB4(l/0)区：RD、WRA3区：IOR、IOWB4(l/O)区:JP51、JP55A2区：JP14、JP15（行输出线）（注意连线方向）2、运行程序，观察实验结果。运行演示程序将会看到字符“欢迎使用星研实验仪”在点阵上自下而上循环移动显示。五、实验代码ADDR_8255_PAEQU270H;8255PADADDR_8255_PBEQU271H

9、;8255PB口ADDR_8255_CEQU273H;8255控制口ADDR_273EQU230H;10区74HC273(16位I/O)LINEEQUADDR_273;行线1,行线2ROW1EQUADDR_8255_PA;列线1ROW2EQUADDR_8255_PB;列线2_STACKSEGMENTSTACKDW100DUP(?)_STACKENDS_DATASEGMENTWORDPUBLIC'DATA'HUANDB00H,0C0H,00H,0C0H,0FEH,0C0H,07H,0FFH,0C7H,86H,6FH,6CH,3CH,60H,18H,60HDB1CH,60H,1CH

10、,70H,36H,0F0H,36H,0D8H,61H,9CH,0C7H,0FH,3CH,06H,00H,00HYINGDB60H,00H,31H,0C0H,3FH,7EH,36H,66H,06H,66H,06H,66H,0F6H,66H,36H,66HDB37H,0E6H,37H,7EH,36H,6CH,30H,60H,30H,60H,78H,00H,0CFH,0FFH,00H,00HSHIDB00H,00H,06H,30H,07H,30H,0FH,0FFH,0CH,30H,1FH,0FFH,3BH,33H,7BH,33HDB1BH,0FFH,1BH,33H,19H,0B0H,18H,0E0H

11、,18H,60H,18H,0FCH,19H,8FH,1FH,03HYONGDB00,0,1FH,0FEH,18H,0C6H,18H,0C6H,18H,0C6H,1FH,0FEH,018H,0C6H,18H,0C6HDB18H,0C6H,1FH,0FEH,18H,0C6H,18H,0C6H,30H,0C6H,30H,0C6H,60H,0DEH,0C0H,0CCHXINGDB00H,00H,1FH,0FCH,18H,0CH,1FH,0FCH,18H,0CH,1FH,0FCH,01H,80H,19H,80HDB1FH,0FEH,31H,80H,31H,80H,6FH,0FCH,01H,80H,01H

12、,80H,7FH,0FFH,00H,00HYANDB0,0,0FFH,0FFH,18H,0CCH,18H,0CCH,30H,0CCH,30H,0CCH,7FH,0FFH,7CH,0CCHDB0FCH,0CCH,3CH,0CCH,3CH,0CCH,3DH,8CH,3DH,8CH,33H,0CH,06H,0CH,0CH,0CHSHI0DB01H,80H,00H,0C0H,3FH,0FFH,3CH,06H,67H,0CCH,06H,0C0H,0CH,0C0H,07H,0C0HDB06H,0C0H,7FH,0FFH,00H,0C0H,01H,0E0H,03H,30H,06H,18H,1CH,1CH,7

13、0H,18HYAN0DB00H,00H,0FCH,60H,0CH,60H,6CH,0F0H,6CH,0D8H,6DH,8FH,6FH,0F8H,7EH,00HDB06H,0C6H,07H,66H,3FH,0ECH,0E7H,0ECH,06H,18H,1FH,0FFH,0CH,00H,00H,00HYIDB0CH,0C0H,0CH,60H,18H,7CH,1BH,6CH,33H,0CH,73H,18H,0F1H,98H,31H,98HDB30H,0F0H,30H,0F0H,30H,60H,30H,0F0H,31H,98H,33H,0FH,3EH,06H,30H,00HNONEDB00H,00H,

14、00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HDB00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H_DATAENDSCODESEGMENTSTARTPROCNEARASSUMECS:CODE，DS:_DATA，SS:_STACKMOVAX，_DATAMOVDS，AXMOVES，AXNOPCALLINIT_IOCALLTEST_LED；调用测试子程序，测试LED是否全亮CALLCLEAR;滚动显示多个字符CHS_SHOW:MOVCX，9；九个汉字LEASI

15、，HUAN；取首个汉字的有效地址CHS_1:PUSHCX;CHS_1可以滚动显示多个字符MOVCX，16CHS_2:CALLDISP_CH；实现显示,DISP_CH可以把每个汉字的32个字节读完并显示出来INCSI实现逐行滚动，SI每次循环自增两次，体现为字模向上移动一行INCSILOOPCHS_2POPCXLOOPCHS_1;读下一个循环对应的汉字JMPCHS_SHOW；显示一个16*16点阵字子程序，字型码放在DPTR指出的地址DISP_CHPROCNEARPUSHCXMOVCX，8DISP_CH_1:CALLDISP1LOOPDISP_CH_1POPCXRETDISP_CHENDP；显示

16、一个16*16点阵字子程序，字型码放在显示缓冲区XBUFFDISP1PROCNEARPUSHSIPUSHCXMOVCX，16;计数器，16列依次被扫描MOVBL，0FEH;上边列输出值MOVBH，0FFH;下边列输出值REPEAT:MOVDX，LINEMOVAX，BXOUTDX，AX;列输出LODSBCALLADJUST；调整AL,将AL中二进制数旋转180度MOVDX，ROW1OUTDX，AL;左边行输出LODSBCALLADJUST；调整AL,将AL中二进制数旋转180度MOVDX，ROW2OUTDX，AL;右边行输出CALLDL10MSCALLCLEARSTCRCLBL，1RCLBH，1

17、；循环移位BX,行线扫描输出0LOOPREPEATPOPCXPOPSIRETDISP1ENDPINIT_IOPROCNEARMOVDX，ADDR_8255_C;8255控制字地址MOVAL，80H;设置8255的PA、PB、PC口为输出口OUTDX，AL;写控制字RETINIT_IOENDPCLEARPROCNEARMOVAX，0FFFFHMOVDX，LINEOUTDX，AXMOVAL，0MOVDX，ROW1OUTDX，ALMOVDX，ROW2OUTDX，ALRETCLEARENDP；测试LED子程序，点亮LED并延时ISTEST_LEDPROCNEARMOVDX,LINEXORAX,AXOU

18、TDX,AXMOVAL,0FFHMOVDX,ROW1OUTDX,ALMOVDX,ROW2OUTDX,ALCALLDL500msCALLDL500msRETTEST_LEDENDP;调整AL中取到的字型码的一个字节，将最高位调整位最低位,最低位调整为最高位ADJUSTPROCPUSHMOVNEARCXCX,8ADJUST1:RCLAL,1XCHGAL,AHRCRAL,1XCHGAL,AHLOOPADJUST1MOVAL,AHPOPCXRETADJUSTENDPDL10msPROCNEARPUSHCXMOVCX,133LOOP$POPCXRETDL10msENDPDL500msPROCNEARPU

19、SHCXMOVCX,0FFFFHLOOP$POPCXRETDL500msENDPSTARTENDPCODEENDSENDSTART六、实验思考题1.修改程序，使显示的字符从左至右动态循环显示。ADDR_8255_PAEQU270H;8255PA口ADDR_8255_PBEQU271H;8255PB口ADDR_8255_CEQU273H;8255控制口ADDR_273EQU230H;IO区74HC273(16位I/O)LINEEQUADDR_273;行线1,行线2ROW1EQUADDR_8255_PA;列线1ROW2EQUADDR_8255_PB;列线2_STACKSEGMENTSTACKDW1

20、024DUP(?)_STACKENDS_DATASEGMENTWORDPUBLIC'DATA'HUANDB00H,0C0H,00H,0C0H,0FEH,0C0H,07H,0FFH,0C7H,86H,6FH,6CH,3CH,60H,18H,60HDB1CH,60H,1CH,70H,36H,0F0H,36H,0D8H,61H,9CH,0C7H,0FH,3CH,06H,00H,00HYINGDB60H,00H,31H,0C0H,3FH,7EH,36H,66H,06H,66H,06H,66H,0F6H,66H,36H,66HDB37H,0E6H,37H,7EH,36H,6CH,30H,

21、60H,30H,60H,78H,00H,0CFH,0FFH,00H,00HSHIDB00H,00H,06H,30H,07H,30H,0FH,0FFH,0CH,30H,1FH,0FFH,3BH,33H,7BH,33HDB1BH,0FFH,1BH,33H,19H,0B0H,18H,0E0H,18H,60H,18H,0FCH,19H,8FH,1FH,03HYONGDB00,0,1FH,0FEH,18H,0C6H,18H,0C6H,18H,0C6H,1FH,0FEH,018H,0C6H,18H,0C6HDB18H,0C6H,1FH,0FEH,18H,0C6H,18H,0C6H,30H,0C6H,30H

22、,0C6H,60H,0DEH,0C0H,0CCHXINGDB00H,00H,1FH,0FCH,18H,0CH,1FH,0FCH,18H,0CH,1FH,0FCH,01H,80H,19H,80HDB1FH,0FEH,31H,80H,31H,80H,6FH,0FCH,01H,80H,01H,80H,7FH,0FFH,00H,00HYANDB0,0,0FFH,0FFH,18H,0CCH,18H,0CCH,30H,0CCH,30H,0CCH,7FH,0FFH,7CH,0CCHDB0FCH,0CCH,3CH,0CCH,3CH,0CCH,3DH,8CH,3DH,8CH,33H,0CH,06H,0CH,0C

23、H,0CHSHI0DB01H,80H,00H,0C0H,3FH,0FFH,3CH,06H,67H,0CCH,06H,0C0H,0CH,0C0H,07H,0C0HDB06H,0C0H,7FH,0FFH,00H,0C0H,01H,0E0H,03H,30H,06H,18H,1CH,1CH,70H,18HYAN0DB00H,00H,0FCH,60H,0CH,60H,6CH,0F0H,6CH,0D8H,6DH,8FH,6FH,0F8H,7EH,00HDB06H,0C6H,07H,66H,3FH,0ECH,0E7H,0ECH,06H,18H,1FH,0FFH,0CH,00H,00H,00HYIDB0CH,

24、0C0H,0CH,60H,18H,7CH,1BH,6CH,33H,0CH,73H,18H,0F1H,98H,31H,98HDB30H,0F0H,30H,0F0H,30H,60H,30H,0F0H,31H,98H,33H,0FH,3EH,06H,30H,00HNONEDB00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HDB00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HCHANGE_RESULTDB00H,00H,00H,00H,00H,00

25、H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HDB00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H_DATAENDSCODESEGMENTSTARTPROCNEARASSUMECS:CODE,DS:_DATA,SS:_STACKMOVAX,_DATAMOVDS,AXMOVES,AXNOPCALLINIT_IOcalltest_led；调用测试子程序，测试led是否全亮CALLCLEARLEAsI，HUAN；CHS_1可以滚动显示多个字符；取首个汉字的有效地址CHS_SHOW:MOV

26、CX，9CALLWORD_MOVECHS_1:PUSHCXMOVCX，16CHS_2:CALLDISP_CH出来；INCSI；INCSILEASI，CHANGE_RESULTCALLWORD_CHANGELOOPCHS_2POPCXLOOPCHS_1CALLWORD_MOVELEASI，CHANGE_RESULTJMPCHS_SHOW；九个汉字；字模拷贝；实现显示,DISP_CH可以把每个汉字的32个字节读完并显示；原程序用于滚动的指令；除了第一次，每次的汉字读取都去CHANGE_RESULT找，只显示CHANGE_RESULT开头的32个字节;将WORD_CHANGE中的字模左移一位；读下一

27、个汉字WORD_MOVEPROCNEAR;给CHANGE_RESULT赋初值HUAN,把十个汉字都拷贝过来PUSHCXPUSHESPUSHDSPUSHSIPUSHDILEASI,HUANLEADI,CHANGE_RESULTMOVAX,DSMOVES,AXMOVCX,320WORD_MOVE1:MOVSBLOOPWORD_MOVE1POPDIPOPSIPOPDSPOPESPOPCX;源;目的；执行完毕后SI,DI自动加一RETWORD_MOVEENDP；把字模拷出来，将WORD_CHANGE中的字模全部整体左移一位WORD_CHANGEPROCNEAR;16x2xl0个字节PUSHCXPUSH

28、DSPUSHSIPUSHBXPUSHFXORBX,BXLEASI,CHANGE_RESULTMOVCX,320MOVE_TO_LAST:INCSILOOPMOVE_TO_LASTMOVCX,16WORD_CHANGE1:CLCPUSHCXMOVCX,10WORD_CHANGE2:RCLSI,1DECSIRCLSI,1SUBSI,31LOOPWORD_CHANGE2;16行;CF置0;10个字;SI=SI-31ADDSI,31POPCX;16+16+7x32-1=255ADDSI,255LOOPWORD_CHANGE1SUBSI,255;LEASI,CHANGE_RESULT;测试是否回到开头POPFPOPBXPOPSIPOPDSPOPCXRETWORD_CHANGEENDP；显示一个16*16点阵字子程序，字型码放在DPTR指出的地址DISP_CHPROCNEAR;把每个汉字的32个字节读完PUSHCXMOVCX,8DISP_CH_1:CALLDISP1LOOPDISP_CH_1POPCXRETDISP_CHENDP；显示一个16*16点阵字子程