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Frequent button polling

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Jul 11th, 2016
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  1. import os
  2. import time
  3. import random
  4. import RPi.GPIO as GPIO
  5.  
  6. GPIO.setmode(GPIO.BCM)
  7. GPIO.setwarnings(False)
  8.  
  9. LEDRed = 18
  10. LEDYellow = 23
  11. LEDGreen = 24
  12. ButtonPin = 25
  13.  
  14. GPIO.setup(LEDRed, GPIO.OUT)
  15. GPIO.setup(LEDYellow, GPIO.OUT)
  16. GPIO.setup(LEDGreen, GPIO.OUT)
  17. GPIO.setup(ButtonPin, GPIO.IN)
  18.  
  19. correct_button = 0
  20.  
  21. start = time.time()
  22.  
  23. while correct_button <= 10:
  24.     led_choice = random.randint(1,3)
  25.     button_seen = False
  26.     for i in xrange(200):
  27.         if led_choice == 1:
  28.             led = LEDRed
  29.         if led_choice == 2:
  30.             led = LEDYellow
  31.             if GPIO.input(ButtonPin) == False:
  32.                 button_seen = True
  33.         if led_choice == 3:
  34.             led = LEDGreen
  35.     if button_seen:
  36.         correct_button = correct_button + 1
  37.     GPIO.output(led, GPIO.HIGH)
  38.     time.sleep(0.001)
  39.     GPIO.output(led, GPIO.LOW)
  40.  
  41. end = time.time()
  42.  
  43. time_taken = end - start
  44. time_taken = str(time_taken)
  45.  
  46. print("Time taken in seconds is " + time_taken)
  47.  
  48. GPIO.cleanup()
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