西电网信院微机原理实验(八)

实验八点阵LED显示设计实验

实验要求：
编写程序，控制点阵向上（或左右）游动显示“西安电子科技大学欢迎您！-姓名”。实验系统中的16×16 LED点阵由四块8×8 LED点阵组成，如图所示，8×8点阵内部结构图如下。

实验目的:

了解LED点阵的基本结构。
学习LED点阵扫描显示程序的设计方法。

8*8LED点阵实验：
为了完成实验要求，先实现8 * 8 LED点阵实验，要求在8 * 8 的LED上循环显示1，2，3这三个数字。

Y7代表从左往右的第一列，以此类推，Y0代表从左往右的最后一列。
对于数字1，从第一行到第八行，对应的需要点亮的LED灯Y7-Y0状态为(假设高电平有效)：00001000，00011000，00101000，00001000，00001000，00001000，00001000，00111110。
对于数字2，从第一行到第八行，对应的需要点亮的LED灯Y7-Y0状态为(假设高电平有效)：00111000，01000100，00000100，00000100，00001000，00010000，00100000，01111110。
对于数字3，从第一行到第八行，对应的需要点亮的LED灯Y7-Y0状态为(假设高电平有效)：00011000，00100100，00000100，00011000，00011000，00000100，00100100，00011000。
如下图所示，当X0-X7为高电平时，代表该行选通，当Y0-Y7为低电平时，代表列选通，为了方便，在Y输出时加入非门，这样CPU输出的高电平代表选中对应的列。假设X0-X7的输出端口地址为00H,Y0-Y7的输出端口为02H。

设置一个计算行数的变量，存放于BX寄存器中，BX=0时屏幕见a图，BX=1时见b图，BX=2时见c图，以此类推。当BX=24时，代表1、2、3已经显示结束，BX清零，重新开始显示，这样就做到了循环显示的目的。设置行从X0到X7依次选通，每一次选通后输出对应行需要点亮的LED。当X0-X7均选通一遍之后,将BX加一，重复上述过程。

注：在每次输出具体数据之前，要先选中X端口，输出全0实现清屏，否则会导致输出错误。利用CX的循环次数控制移动的速度。

汇编代码：

DATA SEGMENT  NUMS:DB 08H,18H,28H,08H,08H,08H,08H,3EH ;数字1DB 38H,44H,04H,04H,08H,10H,20H,7EH ;数字2    DB 18H,24H,04H,18H,18H,04H,24H,18H ;数字3
DATA ENDS
CODE SEGMENTASSUME CS:CODE,DS:DATA
START:MOV AX,DATAMOV DS,AXMOV AH,01HMOV BX,00H
RUN:MOV DX,OFFSET NUMSMOV SI,DXADD SI,BXMOV CX,08H
WAITE:MOV AL,0HOUT 00H,ALMOV AL,[SI]OUT 02H,ALMOV AL,AHOUT 00H,ALROL AH,1PUSH CXMOV CX,700HLOOP $POP CX    INC SILOOP WAITE   INC BXCMP BX,24JA RESET
CONTINUE:    JMP RUN
RESET:MOV BX,00HJMP CONTINUE
CODE ENDS
END START

实验截图：

16*16LED点阵实验：
同8*8的LED点阵实验，如下图所示，对于X0-X15,对应的Y7-Y0分别是(假设高电平有效)：80H, 88H, 88H, 0F8H, 88H, 84H, 80H, 0FFH, 0C0H, 0A0H, 90H, 88H, 84H, 83H, 80H, 80H；对应的Y15-Y8分别是00H, 00H, 00H, 1FH, 00H, 00H, 00H, 7FH, 00H, 01H, 02H, 04H, 08H, 30H, 00H, 00H。其他字同理。

设置计算行数的变量，存放在寄存器BX中，当BX=14*16=224时，代表文字已经显示结束，需要将BX清零，从“西”开始重新显示。当依次选通X0-X15时，点亮对应行的LED，当X0-X15均选通一遍之后，将BX加一，并重复上述操作。假设X0-X7的端口地址为00H，X8-X15的端口地址为02H，Y0-Y7的端口地址为04H，Y8-Y15的端口地址为06H。

汇编代码：

DATA SEGMENTLEFT:;左侧1*2块屏幕，从低位到高位,每个字节是半行DB 0H, 0FFH,  20H, 20H, 20H, 0FCH,24H, 24H, 24H, 24H, 14H, 0CH, 04H, 4H,0FCH, 4H    ;西DB 40H, 80H, 0FCH, 04H, 42H, 40H, 40H,0FFH, 20H, 10H, 18H, 60H, 80H,40H, 30H,0EH    ;安DB 80H, 80H,  80H,0FCH, 84H, 84H, 84H,0FCH, 84H, 84H, 84H,0FCH, 84H,80H, 80H,00H    ;电DB 00H,0FEH,  00H, 00H, 00H, 80H, 80H,0FFH, 80H, 80H, 80H, 80H, 80H,80H,0A0H,40H    ;子DB 10H,0B8H,  0FH, 08H, 08H,0BFH,  8H,01CH, 2CH, 0AH,0CAH,  9H,  8H, 8H,  8H, 8H   ;科DB 8H,  8H,   8H,0C8H, 3FH,  8H,  8H,0A8H, 18H, 0CH, 0BH, 08H, 08H, 08H, 08H,064H   ;技DB 80H, 80H, 80H, 80H, 80H,0FFH, 80H, 80H, 40H, 40H, 20H, 20H, 10H,  8H,  4H,  3H   ;大DB 44H, 88H, 88H,  0H,0FEH,  2H,  1H,0F8H,  0H, 80H,0FFH, 80H, 80H, 80H,0A0H, 40H   ;学DB 0H,   0H, 3FH, 20H,0A0H, 92H, 54H, 28H,  8H, 14H, 24H,0A2H, 81H, 40H, 20H, 10H  ;欢DB 0H,   4H,0C8H, 48H, 40H, 40H, 4FH, 48H, 48H, 48H,0C8H, 48H,  8H, 14H,0E2H,  0H   ;迎DB 90H, 90H, 88H, 4CH, 2AH, 99H, 88H, 48H, 28H, 88H,  8H, 40H, 8AH, 8AH,  9H,0F0H   ;您 DB 80H, 88H, 88H, 0F8H, 88H, 84H, 80H, 0FFH, 0C0H, 0A0H, 90H, 88H, 84H, 83H, 80H, 80HDB 40H, 40H, 0FCH, 40H, 40H, 0FFH, 40H, 20H, 0FCH, 8H, 84H, 0FAH, 81H, 8H, 0AH, 40HDB 0H, 7EH, 40H, 40H, 44H, 48H, 48H, 40H, 0A0H, 48H, 46H, 44H, 40H, 40H, 28H, 10HDB 00H, 00H, 00H, 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H   RIGHT:;右侧1*2块屏幕 DB 00H, 07FH,02H,02H,02H,1FH,12H,12H,12H,12H,1CH,10H,10H,10H,1FH,10HDB 00H, 00H,3FH,20H,10H,00H,00H,7FH,04H,04H,02H,02H,01H,06H,08H,10HDB 00H, 00H,00H,01FH,10H,10H,10H,01FH,10H,10H,10H,01FH,50H,40H,40H,7FHDB 00H, 01FH,08H,04H,02H,01H,00H,07FH,00H,00H,00H,00H,00H,00H,00H,00HDB 08H, 08H,09H,09H,08H,008H,9H,09H,08H,78H,0FH, 08H,08H,08H,08H,08HDB 04H, 04H,4H,07FH,04H,04H,04H,3FH,21H,11H,12H,0AH,4H,0AH,11H,60HDB 00H, 00H,00H,00H,00H,07FH,00H,00H,01H,01H,02H,02H, 4H,8H,10H,60HDB 10H, 10H,08H,4H,07FH,40H,20H,7H,2H,01H,07FH,00H,00H,00H,00H, 0HDB 01H, 01H, 1H,3FH, 20H,10H,02H, 2H,2H, 5H, 5H, 08H, 8H,10H,20H,40HDB 00H, 01H, 3CH,24H,24H,24H,24H,24H,24H,2DH,14H, 04H,4H, 4H,07FH,0HDB 00H, 00H,3FH,20H,12H,0AH,12H,22H,22H,2H, 1H, 0H,20H,48H,48H,0FH    DB 00H, 00H, 00H, 1FH, 00H, 00H, 00H, 7FH, 00H, 01H, 02H, 04H, 08H, 30H, 00H, 00H  DB 00H, 10H, 7H, 2H, 21H, 7FH, 0H, 0H, 7H, 1H, 10H, 3FH, 0H, 0H, 0H, 0H    DB 20H, 7FH, 20H, 20H, 22H, 24H, 24H, 20H, 28H, 24H, 23H, 22H, 20H, 20H, 14H, 8H DB 00H, 00H, 00H, 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATA
START: MOV AX,DATAMOV DS,AXMOV AH,01H   MOV BX,00H ;滚动行数(移向下一字节代表从下一行开始打印)
RUN:MOV DX,OFFSET LEFTMOV SI,DXADD SI,BX   ;计算当前行数（本轮从该行开始打印）MOV DX,OFFSET RIGHTMOV DI,DXADD DI,BX   ;计算当前行数（本轮从该行开始打印）MOV CX,08H;共8行
WRITE1:   ;在上面两块屏幕上输出MOV AL,0HOUT 0H,AL;清屏操作MOV AL,[SI];左边内容OUT 4H,ALMOV AL,[DI];右边内容OUT 6H,ALMOV AL,AH   ;设置目标行OUT 0H,ALROL AH,1;目标行下移INC SI;指向下一行INC DI    PUSH CXMOV CX,0500H ;延迟LOOP $     POP CX LOOP WRITE1MOV AL,0HOUT 0H,ALMOV CX,08H
WRITE2:;在下面两块屏幕上输出MOV AL,0HOUT 2H,AL ;清屏操作MOV AL,[SI] ;左边内容OUT 4H,ALMOV AL,[DI] ;右边内容OUT 6H,ALMOV AL,AH   ;设置目标行OUT 2H,ALROL AH,1  ;目标行下移INC SIINC DIPUSH CXMOV CX,0500HLOOP $     POP CXLOOP WRITE2 INC BXCMP BX,224 ;14个字，向上滚14*16行JA RESET
CONTINUE:JMP RUN
RESET: ;滚动值清零MOV BX,0JMP CONTINUE
CODE ENDS
END START

电路连接图：

实验过程截图：

参考文献

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