52系列单片机由键盘控制8*8点阵，需变出不同花样的汇编程序

52系列单片机由键盘控制8*8点阵，需变出不同花样的汇编程序

在8X8点阵式LED通过按键来选择要显示的图形,点阵控制使用P1端口和P3端口，按键为P2.0

CNTA EQU 30H

COUNT EQU 31H

ORG 00H

LJMP START

ORG 0BH

LJMP T0X

ORG 30H

START: MOV CNTA,#00H

MOV COUNT,#00H

MOV TMOD,#01H

MOV TH0,#(65536-4000) / 256

MOV TL0,#(65536-4000) MOD 256

SETB TR0

SETB ET0

SETB EA

WT: JB P2.0,WT

MOV R6,#5

MOV R7,#248

D1: DJNZ R7,$

DJNZ R6,D1

JB P2.0,WT

INC COUNT

MOV A,COUNT

CJNE A,#03H,NEXT

MOV COUNT,#00H

NEXT: JNB P2.0,$

SJMP WT

T0X: NOP

MOV TH0,#(65536-4000) / 256

MOV TL0,#(65536-4000) MOD 256

MOV DPTR,#TAB

MOV A,CNTA

MOVC A,@A+DPTR

MOV P3,A

MOV DPTR,#GRAPH

MOV A,COUNT

MOV B,#8

MUL AB

ADD A,CNTA

MOVC A,@A+DPTR

MOV P1,A

INC CNTA

MOV A,CNTA

CJNE A,#8,NEX

MOV CNTA,#00H

NEX: RETI

TAB: DB 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH

GRAPH: DB 12H,14H,3CH,48H,3CH,14H,12H,00H

DB 00H,00H,38H,44H,44H,44H,38H,00H

DB 30H,48H,44H,22H,44H,48H,30H,00H

END