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1、一、设计题目点阵滚动广告牌二、设计内容 （1）利用单片机I/O口或以扩展锁存器的方式控制点阵显示。 （2）掌握单片机与1616点阵块之间接口电路设计及编程。 （3）利用实验系统1616点阵实验单元，要求编制程序实现汉字点阵从下倒上滚动循环显示。三、设计原理及方案1、硬件设计原理图实验线路连接：（1）对于后缀名含有“H”的机型，按实验电路图连接138译码输入端A.B.C，其中A连A2，B连A3，C连A4，138使能控制输入端G与位于地址线A0引出孔所在位置下方的使能控制输出端G作对应连接，该端的寻址范围为0FFE0H0FFFFH。（2）用一8芯扁平电缆把点阵单元总线接口与系统单元总线（D0D7）
2、任一接口相连。（3）用一根双头实验线把点阵单元的片选信号CS插孔与译码输出插孔Y0相连。（4）用一根双头实验线把点阵单元的写信号WR插孔与系统控制信号插孔WR相连。硬件电路图： 2、软件设计流程图四、设计方案源程序 CODE SEGMENT ASSUME CS:CODE,DS:CODE,ES:CODE ORG 3AD2H;=HE14: JMP STARTLED0 equ 0ffe3h ;列代码高段(字形)高八位接口地址LED1 equ 0ffe0h ;列代码低段(字形)低位接口地址JED0 equ 0ffe2h ;行扫描高段(字位)高八位接口地址JED1 equ 0ffe1h ;行扫描低段(字
3、位)低八位接口地址;=START: JMP XB13;=x01a: mov BUF+2,00h ;清列值x023: mov bx,OFFSET BUF ;取列值 mov al,02h xlat cmp al,10h ;减16(十进制数) jc x0d2 ;末满16列继续扫描下一列 ret ;本次扫描完毕返回主程序x0d2: MOV dx,0002H MOV ah,00h MUL dx ;当前列乘02 mov cx,ax call xb1f ;= 送扫描代码 = mov dx,led0 ;列代码送高八位锁存器 OUT DX,AL MOV DX,led1 ;列代码送低八位锁存器 mov al,ah
4、 OUT DX,Al ;= 取行代码 = mov bx,offset buf mov al,02h xlat inc al mov BUF+2,al ;列指针加1 mov ah,00h mov cx,ax mov al,01h jmp x083x07e: SAL ax,1x083: loop x07e mov dx,jed0 ;行代码送高八位锁存器 OUT DX,AL MOV DX,jed1 ;行代码送低八位锁存器 mov al,ah OUT DX,Al mov cx,0040h ;当前行锁定显示250u秒 loop $ mov al,00h ;关闭显示 mov dx,jed0 out dx,
5、al mov dx,jed1 OUT dx,al jmp x023 ;继续下1行;=x097: mov al,00h ;关闭显示 mov dx,jed0 out dx,al mov dx,jed1 OUT dx,al ;=x0a0: mov al,00h ;清扫描个数寄存器 mov BUF+3,al ;从第一个开始x0a2: mov bx,OFFSET buf ;取当前扫描个数 mov al,03h xlat cmp al,16h ;减16(十进制数) jnc x0a0 ;满16个返回从第一个开始 ;= MOV ah,00H mov dx,0020h mul dx mov bx,OFFSET
6、stls add ax,bX mov BUF,aL MOV BUF+1,AH ;= mov al,00h ;清扫描次数寄存器 mov BUF+4,alx0bd: mov bx,OFFSET buf ;取当前扫描个数 mov al,04h xlat cmp al,64h ;减64(十进制数) jnc x0cf ;= call x01a ;扫描显示当前字体 ;= mov bx,OFFSET buf ;扫描次数加1 mov al,04h xlat inc al mov BUF+4,al jmp x0bd ;=x0cf: mov bx,OFFSET BUF ;扫描个数加1 mov al,03h xla
7、t inc al mov BUF+3,al jmp x0a2;=STLS:;欢 DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,80H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HDB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,80H,0
8、0H,80H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00HDB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,80H,00H,80H,0FCH,80H DB DB00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,80H,00H,80H,0FCH,80H,04H,0FCH DB 00H,00H,00H,00H,00
9、H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,00H,00H,00H,00H,00H,00H,80H,00H,80H,0FCH,80H,04H,0FCH,45H,04H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,00H,00H,00H,00H,80H,00H,80H,0FCH,80H,04H,0FCH,45H,04H,46H,48H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00
10、H,00H,00H,00H,00H DB 00H,00H,00H,80H,00H,80H,0FCH,80H,04H,0FCH,45H,04H,46H,48H,28H,40H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,80H,00H,80H,0FCH,80H,04H,0FCH,45H,04H,46H,48H,28H,40H,28H,40H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,80H DB 00H,80H,0FCH,80H,04H,0FCH,45H,04H,46H,48H,28H,40H,28H,40H,10H,40H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,80H,00H,80H DB 0FCH,80H,04H,0FCH,45H,04H,46H,48H,28H,40H,28H,40H,10H,40H,28H,40H DB
