text1.asm

protues编的数字电压表

led0 equ 30h

org 0h
ljmp start

start:
mov sp,#60h

loop:

mov led0,#01h
acall disp

ljmp loop


disp:
mov P3,#0ffh
mov P2,led0
mov P3,#0feh
acall delay

mov P3,#0ffh
mov P2,#3fh
mov P3,#0fdh
acall delay

mov P3,#0ffh
mov P2,#06h
mov P3,#0fbh
acall delay

mov P3,#0ffh
mov P2,#3fh
mov P3,#0f7h
acall delay

mov P3,#0ffh
mov P2,#06h
mov P3,#0efh
acall delay

mov P3,#0ffh
mov P2,#3fh
mov P3,#0dfh
acall delay

mov P3,#0ffh
mov P2,#06h
mov P3,#0bfh
acall delay

mov P3,#0ffh
mov P2,#3fh
mov P3,#07fh
acall delay

ret

delay:mov r7,#25
ddd:	mov r6,#50
		djnz r6,$
		djnz r7,ddd
		ret
		
		end