rpi servo python

1# Servo1.py
2
3import RPi.GPIO as GPIO
4import time
5
6P_SERVO = 22 # adapt to your wiring
7fPWM = 50  # Hz (not higher with software PWM)
8a = 10
9b = 2
10
11def setup():
12    global pwm
13    GPIO.setmode(GPIO.BOARD)
14    GPIO.setup(P_SERVO, GPIO.OUT)
15    pwm = GPIO.PWM(P_SERVO, fPWM)
16    pwm.start(0)
17
18def setDirection(direction):
19    duty = a / 180 * direction + b
20    pwm.ChangeDutyCycle(duty)
21    print("direction =", direction, "-> duty =", duty)
22    time.sleep(1) # allow to settle
23   
24print("starting")
25setup()
26for direction in range(0, 181, 10):
27    setDirection(direction)
28direction = 0    
29setDirection(0)    
30GPIO.cleanup() 
31print("done")
32