#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Controle de brilho do led pelo potenciometro
# Programa fica em loop até executar CRTL+c ou kill no processo

import RPi.GPIO as GPIO
import time

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)

p = GPIO.PWM(18, 50)
p.start(0)

def RCtime (RCpin):
        reading = 0
        GPIO.setup(RCpin, GPIO.OUT)
        GPIO.output(RCpin, GPIO.LOW)
        time.sleep(0.1)

        GPIO.setup(RCpin, GPIO.IN)

    while (GPIO.input(RCpin) == GPIO.LOW):
                reading += 1
        return reading

while True:
    print "Valor do Pot: ", RCtime(23)
        val = RCtime(23)
    dc = val/28 # val/x onde x eh o valor max do pot/95
    print "Valor do DC : ", dc
    p.ChangeDutyCycle(dc)