点阵流动显示屏设计(原创).doc

大学生电子设计大赛作品报告点阵流动显示屏设计系别：电子电气工程系班级：06级电子2班姓名：汤 子 坫 点阵流动显示屏设计汤子坫一、 设计构思1、以MCS-51系单片机为核心器件，组成点阵式汉字电子显示屏。显示屏由16*16LED点阵显示器组成,可以通过从右到左流动的方式依次显示出“欢迎光临我院大学生电子设计大赛作品展”个汉字。通过编程可以对汉字修改. 2、进行模块扩展，设计两个中断、一个复位的独立式按键及一个蜂鸣器作发声音功能。二、 硬件设计1、 原理图设计如下各个Protel99se 原理图截图所示： 图1单片机选用AT89S52，因为可以利用它的ISP功能优点，使用很方便。且它的容量较大，可以写8K，方便用于作一些其他的功能扩展。如图1所示，为AT89S552外围的必要电路，有：振荡电路、电源指示电路、ISP下载口连接电路。 图2 图2所示，为两片74HC164芯片组成16列点阵列的选择电路。74HC164为串入并出的并口扩展，只要在程序上用一个上升沿就可以完成列的选择。图3图3，是点阵屏连接和9014作电流驱动的电路设计。图4图4，此电路图为扩展设计。2、 PCB图图5（底层）通过热转印的手工制作方法制作出双面PCB板。由于用单面PCB板进行布线时，线路复杂且要增加很多的跳线，故考虑用双面的。在扩展的按键和蜂鸣器模块用6根的排线进行连接。三、 软件设计1、 主程序流程图的设计图62、 中断服务程序设计 图7图8本作品的详细程序见附页四、 作品调试1、 硬件的调试主要是用目测的方法和万用表的测二极管通断的蜂鸣档位检测电路上下板层之间、同一层是否有断路或开路。由于用手工制PCB板，因此线路上出现了一些断线。检测后，给上面的模糊铜导线覆上锡。为了不会遗漏，用Protel99se的PCB图进行标记。另外，在本作品的扩展模块调试过程中，出现烧写好程序后蜂鸣器不发声的情况，这时先看蜂鸣器是否完好，再我用上电测试作电流驱动的8550三极管是否具有放大的作用。2、 软件的调试将程序的目标代码通过ISP线下载到AT89S52（可多次擦除下载）上，看是否达到预想的结果，并根据现象修改源程序。在调试过程中出现的问题有：A、 无法下载和擦除，原因是电压太低了。调高电压值后，可以正常进行ISP通信。当然，这是在确保在ISP下载线和硬件电路是正确的情形，否则，要重新排查硬件电路。B、 点阵显示模块，根据字的显示效果，看是否要求倒位。如，字镜像了，就要进行倒位处理。可以用调用倒位子程序实现。C、 音乐模块调试，出现了发声不悦耳。根据在自购的实验板上试验音乐程序。发现程序是正确的，因此，又比对硬件电路。后多次细心比对发现，选用的蜂鸣器不同，蜂鸣器分有源和无源的。有源的对一固定电压可发持续声响，这造成发音混淆了。故要改成无源的蜂鸣器，发音正常。 附页：; *作品详细程序*;P3.7(=SX)、P3.5(=CLK)、P3.6(=CLR)numtim equ 20hgewei equ 21hshiwei equ 22hscanled equ 23hjicun equ 40hORG 0000HJMP MAINORG 0003HJMP I0org 00bhjmp tim0ORG 0013HLJMP IN1MAIN:;进行一些主要的初始化MOV SP,#60HSETB EASETB EX1SETB EX0SETB PT0MOV P0,#0MOV P2,#0;清屏MOV DPTR,#TAB1mov r4,#02hmov r3,#134kaishi:mov r2,#30h1:call xianshidjnz r2,h1inc dptr inc dptrdjnz r3,kaishimov r3,#182djnz r4,kaishi;用两个工作寄存器来作总共字码数182*2=364jmp mainI0:;放一段音乐小程序start:mov tmod,#00000001bsetb et0mov numtim,#01hMOV P0,#0;清屏操作MOV P2,#0;*显示音乐字样*MOV DPTR,#TAB3CALL xianshicall xianshicall xianshicall xianshistart0:mov 30h,#00h next:mov a,30h mov dptr,#table movc a,a+dptr mov r2,a mov 46h,a MOV DPTR,#TAB3 CALL xianshi call xianshi call xianshi mov a,46h jz end0 anl a,#0fh mov r5,a mov a,r2 swap aanl a,#0fh mov 46h,a MOV P0,#0;清屏操作 MOV P2,#0 MOV DPTR,#TAB3 CALL xianshi call xianshi call xianshi MOV P0,#0;清屏操作 MOV P2,#0 mov a,46h jnz sing clr tr0 jmp d11 sing: dec a mov 22h,a rl a mov dptr,#table1 movc a,a+dptr mov th0,amov 21h,amov a,22hrl ainc amovc a,a+dptrmov tl0,amov 20h,asetb tr0d11:lcall delay1inc 30hjmp nextend0:clr tr0jmp start0RETIIN1:main0:mov dptr,#tab2mov r3,#236kaishi0:mov r5,#30;显示30次，即一个字要停一小段时间h2:call xianshidjnz r5,h2inc dptrinc dptrdjnz r3,kaishi0jmp main0RETIxianshi:mov r0,#0setb p3.7READ:CLR P3.5MOV A,R0;MOVC A,A+DPTRCALL DAOWEImov jicun,aINC R0MOV A,R0MOVC A,A+DPTRCALL DAOWEIMOV P0,#0;清屏操作MOV P2,#0SETB P3.5CLR P3.7MOV P0,jicunMOV P2,AINC R0CALL DELAY;扫描时间mov a,r0CJNE A,#32,readRETDAOWEI:RLC AMOV 78H,CRLC AMOV 79H,CRLC AMOV 7AH,CRLC AMOV 7BH,CRLC AMOV 7CH,CRLC AMOV 7DH,CRLC AMOV 7EH,CRLC AMOV 7FH,CMOV A,2FHRETTIM0: push accpush pswmov tl0,20hmov th0,21hcpl p1.1 ;由该口输出音频数据pop pswpop accretiDELAY:MOV R6,#2QQ:MOV R7,#50DJNZ R7,$DJNZ R6,QQRETdelay1: mov r7,#02hd2: mov r4,#187d3: mov r3,#248djnz r3,$djnz r4,d3djnz r7,d2djnz r5,delay1retTAB1:db 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,1ch,00hdb 2ch,00h,40h,00h,00h,00h,1ch,00hdb 2ch,00h,40h,00h,00h,00h,00h,00hdb 28h,04h,24h,08h,22h,32h,21h,0c2hdb 26h,0c2h,38h,34h,04h,04h,18h,08hdb 0f0h,30h,17h,0c0h,10h,60h,10h,18hdb 14h,0ch,18h,06h,10h,04h,00h,00hdb 02h,02h,82h,04h,73h,0f8h,20h,04hdb 00h,02h,3fh,0e2h,20h,42h,40h,82hdb 40h,02h,3fh,0fah,20h,02h,20h,42hdb 20h,22h,3fh,0c2h,00h,02h,00h,00hdb 00h,00h,02h,01h,42h,02h,22h,04hdb 3ah,18h,13h,0e0h,02h,00h,0feh,00hdb 02h,00h,03h,0fch,0ah,02h,72h,02hdb 22h,02h,06h,02h,02h,1eh,00h,00hdb 00h,00h,1fh,0f8h,00h,00h,00h,00hdb 7fh,0feh,02h,00h,0ch,00h,0f1h,0fehdb 50h,84h,10h,84h,18h,0fch,16h,84hdb 10h,84h,11h,0feh,10h,80h,00h,00hdb 04h,20h,04h,20h,44h,42h,44h,41hdb 7fh,0feh,84h,80h,84h,80h,04h,08hdb 04h,08h,0ffh,10h,04h,0e0h,44h,58hdb 35h,84h,04h,02h,04h,0fh,00h,00hdb 7fh,0ffh,40h,00h,4ch,40h,52h,20hdb 61h,0c1h,30h,82h,24h,8ch,24h,0f0hdb 0a4h,80h,64h,80h,24h,0feh,24h,81hdb 24h,81h,30h,81h,20h,8fh,00h,00hdb 04h,00h,04h,01h,04h,02h,04h,04hdb 04h,08h,04h,30h,05h,0c0h,0feh,00hdb 05h,80h,04h,60h,04h,10h,04h,0chdb 04h,06h,04h,03h,04h,02h,00h,00hdb 02h,00h,0ch,40h,08h,40h,48h,40hdb 3ah,40h,2ah,40h,0ah,42h,8ah,41hdb 7ah,0feh,2bh,40h,0ah,40h,18h,40hdb 0eah,40h,4ch,40h,08h,40h,00h,00hdb 00h,80h,01h,02h,06h,02h,78h,82hdb 08h,82h,08h,82h,08h,82h,08h,82hdb 0ffh,0feh,48h,82h,08h,82h,08h,82hdb 19h,82h,08h,86h,00h,02h,00h,00hdb 00h,00h,00h,00h,1fh,0f0h,12h,20hdb 12h,20h,12h,20h,12h,20h,0ffh,0fchdb 12h,22h,12h,22h,12h,22h,12h,22hdb 1fh,0f2h,00h,02h,00h,0eh,00h,00hdb 00h,80h,00h,80h,40h,80h,40h,80hdb 40h,80h,40h,82h,40h,81h,47h,0fehdb 48h,80h,50h,80h,60h,80h,40h,80hdb 00h,80h,01h,80h,00h,80h,00h,00hdb 02h,00h,82h,00h,73h,0feh,20h,04hdb 00h,09h,01h,01h,02h,02h,7dh,0c2hdb 41h,34h,41h,08h,41h,08h,7dh,34hdb 03h,0c2h,02h,03h,02h,02h,00h,00hdb 04h,00h,84h,00h,74h,00h,27h,0fehdb 00h,04h,00h,08h,04h,10h,04h,00hdb 04h,00h,04h,00h,0ffh,0ffh,04h,00hdb 04h,00h,04h,00h,04h,00h,00h,00hdb 04h,00h,04h,01h,04h,02h,04h,04hdb 04h,08h,04h,30h,05h,0c0h,0feh,00hdb 05h,80h,04h,60h,04h,10h,04h,0chdb 04h,06h,04h,03h,04h,02h,00h,00hdb 10h,20h,61h,20h,55h,41h,55h,41hdb 55h,0fah,7fh,42h,55h,44h,0d5h,78hdb 55h,44h,7fh,44h,55h,0fah,55h,83hdb 45h,42h,61h,60h,40h,40h,00h,00hdb 01h,00h,02h,00h,04h,00h,1fh,0ffhdb 0e0h,00h,44h,00h,18h,00h,30h,00hdb 0dfh,0ffh,12h,20h,12h,20h,12h,20hdb 16h,20h,12h,60h,10h,20h,00h,00hdb 00h,00h,00h,0feh,00h,84h,00h,84hdb 7eh,84h,44h,84h,44h,0feh,44h,00hdb 44h,0feh,44h,84h,44h,84h,7eh,84hdb 00h,84h,00h,0feh,00h,00h,00h,00hdb 00h,02h,00h,0ch,0ffh,0f0h,90h,80hdb 92h,82h,92h,0ffh,9fh,82h,92h,0c4hdb 92h,0a0h,92h,90h,9fh,98h,92h,0a4hdb 0f2h,0e6h,02h,0a3h,00h,82h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,04h,00h,68h,00hdb 70h,00h,00h,00h,04h,00h,68h,00hdb 70h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hTAB2:db 02h,00h,82h,00h,73h,0feh,20h,04hdb 00h,09h,01h,01h,02h,02h,7dh,0c2hdb 41h,34h,41h,08h,41h,08h,7dh,34hdb 03h,0c2h,02h,03h,02h,02h,00h,00hdb 04h,00h,84h,00h,74h,00h,27h,0fehdb 00h,04h,00h,08h,04h,10h,04h,00hdb 04h,00h,04h,00h,0ffh,0ffh,04h,00hdb 04h,00h,04h,00h,04h,00h,00h,00hdb 00h,20h,04h,20h,24h,20h,24h,40hdb 24h,40h,24h,0ffh,25h,92h,0fdh,92hdb 26h,92h,24h,92h,2ch,92h,14h,92hdb 64h,0ffh,24h,00h,04h,00h,00h,00hdb 00h,00h,00h,00h,00h,6ch,00h,6chdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 08h,40h,06h,40h,80h,0ffh,63h,00hdb 0ch,02h,00h,22h,40h,24h,42h,44hdb 47h,88h,4ah,10h,52h,60h,63h,82hdb 42h,01h,03h,0feh,00h,00h,00h,00hdb 00h,80h,00h,80h,40h,80h,40h,80hdb 40h,80h,40h,82h,40h,81h,47h,0fehdb 48h,80h,50h,80h,60h,80h,40h,80hdb 00h,80h,01h,80h,00h,80h,00h,00hdb 08h,10h,08h,18h,08h,10h,0ffh,0e0hdb 08h,20h,08h,20h,08h,40h,01h,0fehdb 01h,08h,0ffh,08h,11h,08h,11h,08hdb 11h,08h,11h,0feh,10h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,00h,00h,00h,00h,00h,00hdb 00h,00h,07h,0f0h,08h,08h,10h,04hdb 10h,04h,08h,08h,07h,0f0h,00h,00hdb 00h,00h,07h,0f0h,08h,88h,11h,04hdb 11h,04h,18h,88h,00h,70h,00h,00hdb 00h,00h,00h,00h,1fh,0f0h,12h,20hdb 12h,20h,12h,20h,12h,20h,0ffh,0fchdb 12h,22h,12h,22h,12h,22h,12h,22hdb 1fh,0f2h,00h,02h,00h,0eh,00h,00hdb 00h,80h,00h,80h,40h,80h,40h,80hdb 40h,80h,40h,82h,40h,81h,47h,0fehdb 48h,80h,50h,80h,60h,80h,40h,80hdb 00h,80h,01h,80h,00h,80h,00h,00hdb 00h,00h,0eh,0ch,10h,14h,10h,24hdb 10h,44h,11h,84h,0eh,0ch,00h,00hdb 42h,08h,42h,08h,7fh,0f0h,42h,11hdb 42h,92h,07h,04h,00h,18h,0ffh,0e0hdb 00h,04h,42h,04h,42h,04h,7fh,0fchdb 42h,04h,42h,04h,42h,04h,00h,00hdb 0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFhdb 0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFhdb 0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFhdb 0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFhdb 0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFh,0FFhdb 00h,00h,0