puenteh3

import RPi.GPIO as gpio
import time

pin17 = 17
pin22 = 22
pin23 = 23
pin24 = 24

speed = 50

pwm_17 = None
pwm_22 = None
pwm_23 = None
pwm_24 = None

def init():
    gpio.setmode(gpio.BCM)
    gpio.setup(pin17, gpio.OUT)
    gpio.setup(pin22, gpio.OUT)
    gpio.setup(pin23, gpio.OUT)
    gpio.setup(pin24, gpio.OUT)

    pwm_17 = GPIO.PWM(pin17, 500)
    pwm_22 = GPIO.PWM(pin22, 500)
    pwm_23 = GPIO.PWM(pin23, 500)
    pwm_24 = GPIO.PWM(pin24, 500)

    pwm_17.start(0)
    pwm_22.start(0)
    pwm_23.start(0)
    pwm_24.start(0)

def setSpeed():
    pwm_17.ChangeDutyCycle(int(speed))
    pwm_22.ChangeDutyCycle(int(speed))
    pwm_23.ChangeDutyCycle(int(speed))
    pwm_24.ChangeDutyCycle(int(speed))

def forward(sec):
    init()
    gpio.output(pin17, True)
    gpio.output(pin23, True)
    gpio.output(pin22, False)
    gpio.output(pin24, False)
    time.sleep(sec)
    gpio.cleanup()

def reverse(sec):
    init()
    gpio.output(pin22, True)
    gpio.output(pin24, True)
    gpio.output(pin17, False)
    gpio.output(pin23, False)
    time.sleep(sec)
    gpio.cleanup()

setSpeed()
print("forward")
forward(4)
print("reverse")
reverse(2)