?;尼士单片机
;任风逍遥
;步进电机驱动程序
;2004/8/8
;NS-1试验板驱动步进电机
;K1驱动步进电机顺时针转动,K2驱动步进电机逆时针转动
org 000h
ajmp aa
org 010h
;马达正转
aa:
mov 20h,#50
JB P3.6,Bb;如果Ｐ３．６为1则转到Ｂｂ如果为0则顺序执行
a1:
mov r0,#15
loop1:
mov p1,#00110011b
acall delay
mov p1,#11000011b
acall delay
mov p1,#11001100b
acall delay
mov p1,#00111100b
acall delay
djnz r0,loop1
mov a,20h
cjne a,#30,l1;不相等，就转移
ajmp l3
l1:dec 20h l3:
JB P3.6,Bb
jmp a1
Bb:JB P3.7,aa
a2:
mov r0,#15
loop2:
mov p1,#00111100b
acall delay
mov p1,#11001100b
acall delay
mov p1,#11000011b
acall delay
mov p1,#00110011b
acall delay
djnz r0,loop2
mov a,20h
cjne a,#30,l2;不相等，就转移
ajmp l4
l2:dec 20h
l4:
JB P3.7,bb
jmp a2
ret
delay:
mov r6,#25
d1:mov r7,20h
d2:djnz r7,d2
djnz r6,d1
ret
end
步进电机驱动范例
