micropython驱动步进电机
为了驱动步进电机，找了N多源码，有些太过高深看不懂，所以找了个相对简单的（这里）改了一下，实测能驱动28BYJ-48，采用的ULN2003APG驱动板。
import time
from machine import Pin
speed = 2
STEPER_ROUND=512 #转动一圈(360度)的周期
ANGLE_PER_ROUND=STEPER_ROUND/360 #转动1度的周期
#print('ANGLE_PER_ROUND:',ANGLE_PER_ROUND)
p1 = Pin(16, Pin.OUT, value=0)
p2 = Pin(14, Pin.OUT, value=0)
p3 = Pin(12, Pin.OUT, value=0)
p4 = Pin(13, Pin.OUT, value=0)
def Front():
global speed
p1.value(1)
p2.value(1)
p3.value(0)
p4.value(0)
time.sleep_ms(speed)
p1.value(0)
p2.value(1)
p3.value(1)
p4.value(0)
time.sleep_ms(speed)
p1.value(0)
p2.value(0)
p3.value(1)
p4.value(1)
time.sleep_ms(speed)
p1.value(1)
p2.value(0)
p3.value(0)
p4.value(1)
time.sleep_ms(speed)
def Back():
global speed
p1.value(1)
p2.value(1)
p3.value(0)
p4.value(0)
time.sleep_ms(speed)
p1.value(1)
p2.value(0)
p3.value(0)
p4.value(1)
time.sleep_ms(speed)
p1.value(0)
p2.value(0)
p3.value(1)
p4.value(1)
time.sleep_ms(speed)
p1.value(0)
p2.value(1)
p3.value(1)
p4.value(0)
time.sleep_ms(speed)
def Stop():
p1.value(0)
p2.value(0)
p3.value(0)
p4.value(0)
def Run(angle):
global ANGLE_PER_ROUND
val=ANGLE_PER_ROUND*abs(angle)
if(angle>0):
for i in range(0,val):
Front()
else:
for i in range(0,val):
Back()
angle = 0
Stop()
def main():
SteperRun(180)
SteperRun(-180)
