一个8×8点阵字符显示.asm

基于Proteus的51系列单片机设计与仿真

       ORG  00H
START: MOV  A,#00H
       MOV  P0,A
       MOV  30H,#00H
LOOP1: MOV  R1,#10H
LOOP2: MOV  R6,#08H
       MOV  R4,#01H
       MOV  R0,30H
LOOP3: MOV  A,R4
       MOV  P3,A
       ADD  A,#01H
       MOV  R4,A
       MOV  A,R0
       MOV  DPTR,#TABLE
       MOVC A,@A+DPTR
       MOV  P0,A
       INC  R0
       MOV  R3,#10H
LOOP4: MOV  R5,#248
       DJNZ R5,$
       DJNZ R3,LOOP4
       ANL  P3,#00H       
       DJNZ R6,LOOP3
       DJNZ R1,LOOP2       
       LCALL DELAY
       MOV  30H,R0
       CJNE R0,#64,LOOP1
       SJMP START
DELAY: MOV  R7,#10
DELA:  MOV  R6,#100
DEL:   MOV  R5,#248
       DJNZ R5,$
       DJNZ R6,DEL
       DJNZ R7,DELA
       RET
TABLE: DB 00H,00H,42H,7EH,42H,42H,00H,00H ;"I"
       DB 00H,42H,7EH,42H,02H,02H,02H,00H ;"L"
       DB 00H,3CH,22H,42H,42H,22H,3CH,00H ;"O"
       DB 00H,40H,70H,0CH,0CH,70H,40H,00H ;"V"
       DB 00H,42H,7EH,4AH,4AH,5AH,22H,00H ;"E"
       DB 00H,40H,62H,1EH,12H,60H,40H,00H ;"Y"
       DB 00H,3CH,22H,42H,42H,22H,3CH,00H ;"O"
       DB 00H,7CH,46H,02H,02H,7CH,40H,00H ;"U"
       RET
       END