servo3.py 文件源码

def rotate_motor(duration,sleeptime):
   import RPi.GPIO as GPIO
   #import time

   servoPIN = 17
   GPIO.setmode(GPIO.BCM)
   GPIO.setup(servoPIN, GPIO.OUT)

   p = GPIO.PWM(servoPIN, 500) # GPIO 18 als PWM mit 50Hz
   p.start(2.5) # Initialisierung
   try:

      while duration > 0:
        p.ChangeDutyCycle(1)
    print 'motor running'+str(duration)
        time.sleep(sleeptime)
        duration -= 1
      p.stop()
      GPIO.cleanup()
   except KeyboardInterrupt:
      p.stop()
      GPIO.cleanup()