dianji.asm

6221mada.asm.........遥控电机程序

;步进电机正转，反转各3圈
;***************************************************************************
org 00h
x1:mov r3,#250
start:mov r0,#00h
start1:
mov p1,#0ffh
mov a,r0
mov dptr,#table
movc a,@a+dptr
jz start
cpl a
mov p1,a
call delay
inc r0
djnz r3,start1
mov r3,#250
start2:
mov p1,#0ffh
 mov r0,#05
start3:mov a,r0
mov dptr,#table
movc a,@a+dptr

jz start2
cpl a
mov p1,a
call delay
inc r0
djnz r3,start3
jmp x1
delay:	mov r5,#40;延时。
d1: 	mov r6,#10
d2:	mov r7,#18
	djnz r7,$
	djnz r6,d2
	djnz r5,d1
	ret
table:
db 03h,09h,0ch,06h
db 00
db 06h,0ch,09h,03h
db 00
end