ledjishucontrul.asm

PIC单片计机设计~基于MPLAB的LED程序设计.

LIST P=18F452
INCLUDE"P18F452.INC"
       ORG  0000H
       NOP
       BSF  STATUS,5
       MOVLW  00H
       MOVWF  TRISD
       BCF  STATUS,5
       MOVLW  00H
       MOVWF  PORTD
LOOP   INCF   PORTD
       
       CALL   DELAY20MS
       GOTO   LOOP
       
DELAY20MS  MOVLW  17H
           MOVWF  20H
LOOP1      MOVLW  0FFH
           MOVWF  21H
LOOP2      DECFSZ 21H
           GOTO  LOOP2
           DECFSZ 20H
           GOTO  LOOP1
           RETURN
           
           END