kl10键盘显示.asm

这是一个键盘显示的程序,一般键盘都可以用它,只是需要你更改其中的一些参数而已,很不错吧!

OUTBIT    EQU   08002H
OUTSEG    EQU   08004H
LEDBUF    EQU   60H
NUM       EQU   70H
DELAYT    EQU   75H

          ORG   0000H
          LJMP  START
LEDMAP:
          DB    3FH, 06H, 5BH, 4FH, 66H, 6DH, 7DH, 07H
          DB    7FH, 6FH, 77H, 7CH, 39H, 5EH, 79H, 71H
DELAY:    MOV   R7,  #0
DELAYLOOP: DJNZ R7,  DELAYLOOP
           DJNZ R6,  DELAYLOOP
           RET
DISPLAYLED:MOV  R0,  #LEDBUF
           MOV  R1,  #6
           MOV  R2,  #00100000B
LOOP:      MOV  DPTR,#OUTBIT
           MOV  A,   #0
           MOVX @DPTR, A
           MOV  A,   @R0
           MOV  DPTR, #OUTSEG
           MOVX @DPTR, A
           MOV  DPTR,  #OUTBIT
           MOV  A,     R2
           MOVX @DPTR,A
           MOV  R6,    #01
           CALL DELAY
           MOV  A,     R2
           RR   A
           MOV  R2,    A
           INC  R0
           DJNZ R1,    LOOP
           MOV  DPTR,  #OUTBIT
           MOV  A,     #0
           MOVX @DPTR, A
           RET
START:     MOV  SP,    #40H
           MOV  NUM,   #0 
MLOOP:     INC  NUM
           MOV  A,     NUM
           MOV  B,     A
           MOV  R0,    #LEDBUF
FILLBUF:   MOV  A,     B
           ANL  A,     #0FH
           MOV  DPTR,  #LEDMAP
           MOVC A,     @A+DPTR
           MOV  @R0,   A
           INC  R0
           INC  B
           CJNE R0,   #LEDBUF+6,  FILLBUF
           MOV  DELAYT,   #30
DISPAGAIN: CALL DISPLAYLED
           DJNZ DELAYT,   DISPAGAIN
           LJMP MLOOP
      END