基于51单片机的16x16 led点阵显示屏设计原理与电路图

ORG 0000H

AJMP  BEGIN

ORG 0030H

BEGIN:

MOV R0,#8

MAIN:

MOV A,R0

MOV R2,#00H

MOV SP,#60H

MOV R3,A

MOV R4,#16

MOV DPTR,#WORDTAB

START:

JNB P1.0,SLOW

JNB P1.1,SOON

MOV R1,#00H

SCAN8:

MOV A,R1

SWAP A

MOV P3,A

SWAP A

INC A

MOV R1,A

MOV A,R2

MOVC A,@A+DPTR

CJNE A, #0DDH,NEXT

AJMP MAIN

NEXT:

MOV P2,A

INC R2

MOV A,R2

MOVC 宴慧谨A,@A+DPTR

MOV P0,A

INC R2

LCALL DELAY1400

MOV P0,#00H

MOV P2,#00H

DJNZ R4,SCAN8

MOV R4,#16

DJNZ R3,SCAN16

AJMP 晌基END16

SCAN16:

MOV A,R2

CLR C

SUBB A,#32

MOV R2,A

AJMP START

END16:

INC DPTR

INC DPTR

MOV A,R2

CLR C

SUBB A,#32

MOV R2,A

MOV A,R0

MOV R3,A

AJMP START

SLOW:

LCALL DELAY20000

DEC R0

JB P1.0,$

AJMP BACK

SOON:

LCALL DELAY20000

INC R0

JB P1.1,$

AJMP BACK

BACK:

LCALL DELAY20000

AJMP START

DELAY1400:   ;误差 0us

    MOV R6,#7FH

DL0:

    MOV R7,#04H

    DJNZ R7,$

    DJNZ R6,DL0

    RET

DELAY20000:   ;误差 0us

    MOV R6,#0D7H

DL1:

    MOV R7,#2DH

    DJNZ R7,$

    DJNZ R6,DL1

    NOP

    NOP

 碧并   RET

WORDTAB:

DB 00H,1FH,80H,20H,40H,40H,20H,40H,10H,40H,08H,40H,04H,20H,02H,10H;

DB 02H,10H,04H,20H,08H,40H,10H,40H,20H,40H,40H,40H,80H,20H,00H,1FH;

TAB:;结束码

DB 0DDH

END

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