实验16 汉字显示屏倚天一出宝刀屠龙

汉字显示屏广泛应用于汽车报站器，广告屏等。XL2000试验仪有一个标准的16*16点阵的汉字显示屏。 他的行扫描部分分别由单片机的P0,P2口担任， 列扫描部分则是由一个74LS154的4-16译码器组成。

其电路原理如下：

接线方法：

1用一根8PIN的数据排线， 一端接到汉字屏部分的JP55一端接到CPU部份的P0口JP51.

2用一根8PIN的数据排线， 一端接到汉字屏部分的JP54一端接到CPU部份的P2口JP52.

3用一根4PIN数据线一端插入CPU部分JP44（P1口）的P1.0,P1.1,P1.2,P1.3另外一端插入汉字屏部分的JP62.

试验参考程序：汉字屏轮流显示倚天一出宝刀屠龙八个汉字。  

ORG 00H
START: MOV A,#0FFH
MOV P0,A
ANL P2,#00
MOV R2,#200
D1: MOV R3,#248 ;延时
DJNZ R3,$
DJNZ R2,D1
MOV 20H,#00H
l1: MOV R1,#100
L2: MOV R6,#16
MOV R4,#00H
MOV R0,20H
L3: MOV A,R4
MOV P1,A ;开三极管
INC R4
MOV A,R0
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV P0,A ;查表送P0口
INC R0
MOV A,R0
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV P2,A ;查表送P2口
INC R0
MOV R3,#02
D2: MOV R5,#248
DJNZ R5,$
DJNZ R3,D2
MOV A,#00H
MOV P0,A
ANL P2,#00H
DJNZ R6,L3
DJNZ R1,L2
MOV 20H,R0
CJNE R0,#0FFH,L1 ;检测是否送完
JMP START
TABLE :
db 01H,00H,02H,00H,04H,00H,1FH,0FFH;倚
db 0E2H,00H,22H,00H,22H,0FCH,26H,88H
db 2AH,88H,0F2H,88H,2AH,0FAH,26H,01H
db 63H,0FEH,26H,00H,02H,00H,00H,00H

db 02H,01H,42H,01H,42H,02H,42H,04H;天
db 42H,08H,42H,30H,42H,0C0H,7FH,00H
db 42H,0C0H,42H,30H,42H,08H,42H,04H
db 0C2H,02H,46H,03H,02H,02H,00H,00H

db 01H,00H,01H,00H,01H,00H,01H,00H;一
db 01H,00H,01H,00H,01H,00H,01H,00H
db 01H,00H,01H,00H,01H,00H,01H,00H
db 01H,00H,03H,00H,01H,00H,00H,00H

db 00H,00H,00H,7FH,3FH,02H,02H,02H;出
db 02H,02H,02H,02H,02H,02H,0FFH,0FEH
db 02H,02H,02H,02H,02H,02H,02H,02H
db 3FH,02H,00H,7FH,00H,00H,00H,00H

db 08H,00H,30H,02H,22H,02H,22H,42H;宝
db 22H,42H,22H,42H,0A2H,42H,63H,0FEH
db 22H,42H,22H,52H,22H,0DAH,26H,42H
db 22H,06H,28H,02H,30H,00H,00H,00H

db 00H,00H,20H,01H,20H,02H,20H,04H;刀
db 20H,18H,20H,60H,3FH,80H,20H,00H
db 20H,00H,20H,02H,20H,01H,20H,02H
db 7FH,0FCH,20H,00H,00H,00H,00H,00H

db 00H,02H,00H,0CH,7FH,0F4H,51H,08H;屠
db 55H,10H,55H,3FH,55H,6AH,5FH,0AAH
db 55H,2AH,57H,2AH,55H,2AH,59H,2AH
db 0F1H,7FH,43H,20H,01H,00H,00H,00H

db 08H,00H,08H,01H,08H,02H,08H,0CH;龙
db 08H,30H,09H,0C4H,0FEH,04H,08H,08H
db 0FH,0FCH,48H,22H,28H,42H,08H,82H
db 0BH,02H,18H,02H,08H,1EH,00H,00H
end