8255a并行口实验

1、实习报告计算机应用综合实习一硬件起止日期： 2009年09月14日至 2009年09月21日学 生姓名班级成绩指导教师（签字）电子与信息工程系2009年9月20日一、实习目的(1) 利用微机接口芯片8255,并行控制led点阵显示。(2) 掌握8088微机系统与led点阵之间接口电路设计及编程。二、实习要求利用589h实习系统扩展接口 cz7座，在控制板mci上以并行方式控制led点阵显示。要求自建字库，编制程序将自己的姓名或图形实现左移、右移,三、匕下移动。编程指南t/0 口地址分配扩展名称口地址用处xpa8000h列扫描1xpb8001h列扫描2xpc8002ii行代码1xpcmd8003

2、h8255控制口pa0ff28h行代码2pcmd0ff2bh8255控制口根据提供i/o地址、功能，有不同i/o 口分别提供自行代码送行，列 扫描信号送列扫描行，凡字形代码位“i”、列扫描信号“0”该点点从!亮，否则灯熄，通过逐行扫描,硬件连接图循环点亮字形获曲线。o1sx3lkd02iuracrsu尺7ckfo 1/ad1i>o»>o "axx f>o d"ads f*o gaexsf*o -7/ad7pn "4 1 25pn s/a 1 4f*2 .s/a iap24s 1 2p2.3/a 丄 1pj n4 iof>2 1/a

3、9f>2 o“a8x§veerq.pppfppp可xjljhsejflhiu a 1fl2rt3k4rzsr7 rbz n 51-4 osq.1.232 哼11111111pppppppp023:号3&37335"53333n30no272e>ns3-a.tsss1vi61 1 二冃i jn aovozr>五、程序代码;code segment;usr-led 16x16;assume cs:codexpaequ 8000hxpbequ 8001h;l-sao-1 ,ctl-mode:b1ng xin ko;l-sao-2pa equxpc equ

4、xpctl equpctl equdata0ff28h ;h-code-18002h ;h-code-28oo3hsegmentorg 2dbohfl db ?ro dw?r1 db ?r6 dw?data endscode0ff2bhat 0;bl sao flag;h-code;l-code;xpa/xpbsegmentassume cs:code,ds:dataorg 2dc0hstart: mov dx,xpctlmov al,80hout dx,almov dx,pctlout dx,alcall offledmov al,oohmov fl,almov r6,8000h ;xpax

5、0: mov r0,0000hxi: call deliinc roinc rocmp ro,0 bohjnzx1jmp x0dispw:push ro;h-nummovr1,01h;l-numdisp1: mov ax,romov bx,offset tabadd bx,axmoval,cs:bxmov dx,paout dx,alinc romov ax,romov bx,offset tabadd bx,axmoval,cs:bxmov dx,xpcout dx,almov dx,r6moval,r1not alout dx,almov cx,0080hloopscall offledi

6、nc rorclr1,1jnc disp1cmp fl,oohjnz exitinc flclcmovr1,01hmov r6,8001hjmp disp1exit:mov r6,8000hmov fl,oohpop roretoffled:mov dx,xpamov al,0ffhout dx,almov dx,xpbout dx,alretdeli: mov cx,0020hconi: push cxcall dispwpop cxloopconirettab:dbooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh

7、,ooh dbooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,oohdb02h,00h,04h,l 0h,08h,14h,l 0h,92h,20h,51 h,0c0h,30h,60h, 13h, 1ch,1chdb08h, 10h,00h,00h,0e0h, 1 fh,04h,00h,02h,00h,0fch,0ffh,00h,00h,ooh,oohdb00h,l 2h,00h, 12h,80h,l 2h,7fh,14h,0a2h,0ffh,22h,l 4h,0a2h,l oh, 22h,03hdb22h,7ch,

8、22h,48h,22h,48h,0bfh,4fh,00h,48h,00h,48h,00h,08h,00h,()()hdb02h,00h,04h,l 0h,08h,14h,l 0h,92h,20h,51 h,0c0h,30h,60h, 13h, 1ch,1chdb08h, 10h,00h,00h,0e0h, 1 fh,04h,00h,02h,00h,0fch,0ffh,00h,00h,ooh,oohdb04h,00h,04h,40h,04h,40h,0fch,43h,04h,40h,04h,40h,04h,40h,04h,40hdb0fch,7fh,04h,41 h,04h,41 h,04h,4

9、1 h,04h,41 h,04h,41 h,04h,40h,00h,()()hdb06h,02h,0f8h,l 2h,04h,l 2h,02h,l 2h,0feh,()ffh,42h, 12h,42h, 12h, 02h,41hdb0fah,43h,l 2h,7dh,12h,41 h,12h,45h, 12h,43h,0fah,7dh,02h,00h, ooh,oohdb21 h,00h,21 h,00h,22h,01 h,22h,7dh,24h,45h,28h,45h,30h,45h,0e0 h,45hdb30h,45h,28h,45h,24h,45h,26h,7dh,23h,01 h,22

10、h,00h,20h,00h,00h, oohdb 00h,02h,00h,04h,0feh,0fh,00h,38h,00h,0e2h,80h,44h,80h,08h,9 oh,1()hdb 88h,28h,8eh,0e7h,94h,12h,0a0h,08h,0c0h,06h,80h,03h,00h,02h, ooh,oohdb00h,00h,80h,08h,80h,30h,80h,24h,80h,24h,80h,24h,82h,24h,81h, 0a4hdb0feh,67h,80h,24h,80h,24h,80h,24h,80h,24h,80h,30h,00h,20h500 h,()()hdb

11、ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh dbooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh dbooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh dbooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh,ooh code endsend start六、总结这次试验，硬件连接和软件使用起初并不是很熟练，而且在联机的 时候岀现问题，主要是硬件设施的连接牢固性。随后字库的建立和程序 的编写遇到了困难。字库不会建立；建立好了不能按