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最近想用树莓派控制A4988，网上没找到相应的教程。今天发出来供大家学习。

由于刚开始学python，难免有误，欢迎大家指正

import RPi.GPIO as GPIO

import time

dirPin=17

stepperPin=18

powerPin=27     #控制A4988的供电

outpins=[17,18,27]

inpins=[15]

def setup():

GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

GPIO.setup(outpins, GPIO.OUT)

GPIO.setup(inpins, GPIO.IN)

def opendoor(steps):

GPIO.output(powerPin,GPIO.HIGH)

GPIO.output(dirPin,GPIO.HIGH)

time.sleep(0.05);

for i in range(0,steps):

GPIO.output(stepperPin,GPIO.HIGH)

time.sleep(0.002)

GPIO.output(stepperPin,GPIO.LOW)

time.sleep(0.002)

time.sleep(1)

destory()

def lockdoor(steps):

GPIO.output(powerPin,GPIO.HIGH)

GPIO.output(dirPin,GPIO.LOW)

time.sleep(0.05);

for i in range(0,steps):

GPIO.output(stepperPin,GPIO.HIGH)

time.sleep(0.002)

GPIO.output(stepperPin,GPIO.LOW)

time.sleep(0.002)

time.sleep(1)

destory()

def destory():

GPIO.output(stepperPin,GPIO.LOW)

GPIO.output(dirPin,GPIO.LOW)

GPIO.output(powerPin,GPIO.LOW)

print(GPIO.input(powerPin))

if __name__ == '__main__':

setup()

try:

opendoor(800)

lockdoor(800)

except KeyboardInterrupt:

destory()