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 |