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本LED點(diǎn)陣顯示屏主要是由AT89S51單片機(jī)，2片74LS154（4線—16線譯碼器）和1片74LS04（六非門）及2塊16X16LED點(diǎn)陣組成。LED點(diǎn)陣顯示屏采用的是16X16的LED點(diǎn)陣（由4塊8X8LED點(diǎn)陣組合而成，共用了8塊，可一次顯示2個(gè)漢字）。一個(gè)16X16的點(diǎn)陣（64個(gè)點(diǎn)）才能顯示一個(gè)漢字，2個(gè)英文字母或阿拉伯?dāng)?shù)字。顯示一個(gè)漢字供需32個(gè)十六進(jìn)制數(shù)據(jù)碼（行16，列16），這一項(xiàng)工作通常由專門的漢字取模軟件來完成。通過對AT89S51單片機(jī)的編程，運(yùn)用“MOV DPTR,#TABLE與MOVC A,@A+DPTR”兩個(gè)指令將數(shù)據(jù)碼一一取出來，并送入LED顯示屏將其顯示出來。廣泛的應(yīng)用于銀行，飯店，學(xué)校，醫(yī)院，公交車，廣場等地方。 匯編源程序如下：
ORG 00H LJMP START ORG 030H START: MOV A,#0FFH MOV P0,A MOV P2,A MOV 2AH,#00 MOV R3,#200 D1MS: MOV R5,#250 F1: DJNZ R5,F1 DJNZ R3,D1MS DIS: MOV R2,#01H MOV 20H,#00 D4: MOV R4,#00H MOV R1,#0FFH D5: MOV R6,#32 MOV R0,20H D2: MOV A,R4 MOV P1,A MOV A,R0 MOV DPTR,#TABLE MOVC A,@A+DPTR MOV P0,A INC R0 MOV A,R0 MOV DPTR,#TABLE MOVC A,@A+DPTR MOV P2,A INC R0 MOV R3,#50 F10: DJNZ R3,F10 MOV A,#0FFH MOV P0,A MOV P2,A INC R4 DJNZ R6,D2 MOV R4,#00 DJNZ R1,D5 MOV 20H,R0 DJNZ R2,D4 MOVE3: JB 2AH.0,MOVE00 MOVE1: MOV DPTR,#TABLE MOV 2AH,#00H MOVE: MOV 20H,#00 MOV R4,#00 M1: MOV R1,#01FH M2: MOV R6,#32 MOV R0,20H M3: MOV A,R4 MOV P1,A MOV A,R0 MOVC A,@A+DPTR MOV P0,A INC R0 MOV A,R0 MOVC A,@A+DPTR MOV P2,A INC R0 CJNE R0,#00,MOVE0 JB 2AH.0,MOVE01 MOV DPTR,#TABLE1 MOVE0: MOV R3,#100 DJNZ R3,$ MOV A,#0FFH MOV P0,A MOV P2,A INC R4 DJNZ R6,M3 JB 2AH.0,MOVE02 MOV DPTR,#TABLE MOVE04: MOV R4,#00 DJNZ R1,M2 MOV A,20H ADD A,#08 MOV 20H,A XRL A,#248 JNZ M1 JB 2AH.0,MOVE1 MOV 2AH,#01 JMP MOVE3 MOVE00: MOV DPTR,#TABLE1 JMP MOVE MOVE01: MOV DPTR,#TABLE JMP MOVE0 MOVE02: MOV DPTR,#TABLE1 JMP MOVE04 TABLE:;祝 DB 0EFH,0BFH,0EFH,7FH DB 6EH,0FFH,8CH,00H DB 0EAH,0FFH,0E7H,3EH DB 0FFH,0FDH,80H,0FBH DB 0BEH,07H,0BEH,0FFH DB 0BEH,0FFH,0BEH,01H DB 80H,0FEH,0FFH,0FEH DB 0FFH,0F8H,0FFH,0FFH ;大 DB 0FBH,0FFH,0FBH,0FEH DB 0FBH,0FDH,0FBH,0FBH DB 0FBH,0F7H,0FBH,0EFH DB 0FBH,0DFH,00H,3FH DB 0FBH,0DFH,0FBH,0EFH DB 0FBH,0F7H,0FBH,0FBH DB 0FBH,0FDH,0FBH,0FEH DB 0FBH,0FEH,0FFH,0FFH ;家 DB 0F7H,0FFH,0EFH,0FBH DB 9FH,6BH,0D7H,6BH DB 0D7H,5BH,0D6H,0B7H DB 0D5H,6DH,52H,0DEH DB 97H,00H,0D7H,9FH DB 0D6H,6FH,0DFH,0F7H DB 0D7H,0FBH,0CFH,0FBH DB 0DFH,0FBH,0FFH,0FFH ;新 DB 0FBH,77H,0DBH,6FH DB 0CBH,5DH,53H,7EH DB 98H,01H,0D3H,5FH DB 0CBH,65H,0DBH,7BH DB 0FFH,0F7H,0C0H,0FH DB 0DBH,0FFH,0DBH,0FFH DB 0D8H,00H,0BBH,0FFH DB 7BH,0FFH,0FFH,0FFH ;年 DB 0FFH,0DFH,0FBH,0DFH DB 0F7H,0DFH,0EFH,0DFH DB 18H,1FH,0DBH,0DFH DB 0DBH,0DFH,0DBH,0DFH DB 0C0H,00H,0DBH,0DFH DB 0DBH,0DFH,0DBH,0DFH DB 0DBH,0DFH,0DFH,0DFH DB 0FFH,0DFH,0FFH,0FFH ;好 DB 0F7H,0FEH,0F7H,0FDH DB 0F0H,3BH,07H,0D7H DB 0F7H,0CFH,0F0H,37H DB 0FEH,0FBH,0BEH,0FFH DB 0BEH,0FDH,0BEH,0FEH DB 0B0H,01H,0AEH,0FFH DB 9EH,0FFH,0BEH,0FFH DB 0FEH,0FFH,0FFH,0FFH ;! DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 83H,0F1H,00H,60H DB 00H,20H,00H,60H DB 83H,0F1H,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH ;虎 DB 0FFH,0FEH,0FFH,0FDH DB 0E0H,03H,0EFH,0FEH DB 0EBH,0FDH,0EBH,83H DB 0EBH,0BFH,00H,0BFH DB 0AAH,0BFH,0AAH,81H DB 0AAH,0FEH,0EEH,0FEH DB 0E4H,0FEH,0EFH,0F8H DB 0FFH,0FFH,0FFH,0FFH TABLE1:;年 DB 0FFH,0DFH,0FBH,0DFH DB 0F7H,0DFH,0EFH,0DFH DB 18H,1FH,0DBH,0DFH DB 0DBH,0DFH,0DBH,0DFH DB 0C0H,00H,0DBH,0DFH DB 0DBH,0DFH,0DBH,0DFH DB 0DBH,0DFH,0DFH,0DFH DB 0FFH,0DFH,0FFH,0FFH ;大 DB 0FBH,0FFH,0FBH,0FEH DB 0FBH,0FDH,0FBH,0FBH DB 0FBH,0F7H,0FBH,0EFH DB 0FBH,0DFH,00H,3FH DB 0FBH,0DFH,0FBH,0EFH DB 0FBH,0F7H,0FBH,0FBH DB 0FBH,0FDH,0FBH,0FEH DB 0FBH,0FEH,0FFH,0FFH ;吉 DB 0DFH,0FFH,0DDH,0FFH DB 0DDH,0FFH,0DDH,81H DB 0DDH,0BBH,0DDH,0BBH DB 0DDH,0BBH,01H,0BBH DB 0DDH,0BBH,0DDH,0BBH DB 0DDH,0BBH,0DDH,81H DB 0DDH,0FFH,0DDH,0FFH DB 0DFH,0FFH,0FFH,0FFH ;萬 DB 0FFH,0FFH,0BFH,0FBH DB 0BFH,0F7H,0BFH,0EFH DB 0BFH,0DFH,0BFH,0BFH DB 80H,7FH,0BBH,0FFH DB 0BBH,0FBH,0BBH,0FDH DB 0BBH,0FBH,0B8H,07H DB 0BFH,0FFH,0BFH,0FFH DB 0BFH,0FFH,0FFH,0FFH ;事 DB 0BFH,0BFH,0BFH,0BFH DB 0A2H,0AFH,0AAH,0AFH DB 0AAH,0AFH,0AAH,0ADH DB 0AAH,0AEH,00H,00H DB 0AAH,0AFH,0AAH,0AFH DB 0AAH,0AFH,0AAH,0AFH DB 0A2H,0FH,0BFH,0BFH DB 0BFH,0BFH,0FFH,0FFH ;如 DB 0F7H,0FEH,0F7H,0FDH DB 0F0H,3BH,07H,0D7H DB 0F7H,0EFH,0F7H,97H DB 0F0H,7BH,0F7H,0FDH DB 0FFH,0FFH,0E0H,07H DB 0EFH,0F7H,0EFH,0F7H DB 0EFH,0F7H,0EFH,0F7H DB 0E0H,07H,0FFH,0FFH ;意 DB 0F7H,0FFH,0F7H,0FBH DB 0B7H,0E7H,0B4H,3FH DB 95H,0A3H,0A5H,0BDH DB 0B5H,0BDH,34H,2DH DB 0B5H,0B5H,0A5H,0BDH DB 95H,0BDH,0B4H,39H DB 0B7H,0EFH,0B7H,0F3H DB 0F7H,0FFH,0F7H,0FFH ;! DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 83H,0F1H,00H,60H DB 00H,20H,00H,60H DB 83H,0F1H,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH END 注：晶振12MHZ。 本程序已通過實(shí)踐驗(yàn)證�。。�
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