control.py

import readchar
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)

GPIO.setup(18, GPIO.OUT)

p = GPIO.PWM(18, 50)

p.start(7.5)

i = 1

while 1:
 i += 1
 key = readchar.readkey()
 print(key)
 if key == 'q':
 break
 if key == 'd':
 try:
 while True:
 p.ChangeDutyCycle(7.5) #90
 time.sleep(1)
 p.ChangeDutyCycle(12.5) #180
 time.sleep(1)

 except KeyboardInterrupt:
 p.stop()


GPIO.cleanup()