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Button-handling via callback

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This commit is contained in:
Michael Mandl 2015-12-31 14:11:37 +01:00
parent 71b29ed3d5
commit 517877559d
2 changed files with 22 additions and 16 deletions
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28
button_led.py
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@ -4,23 +4,27 @@ from time import sleep
import RPi.GPIO as GPIO
ledPin = 14
buttonPin = 16
def buttonHandler(channel):
print "button pushed"
GPIO.output(ledPin, not GPIO.input(ledPin))
try:
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.setup(14, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(ledPin, GPIO.OUT)
GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP)
last_state = True
last_led_state = False
GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=300)
GPIO.output(ledPin, False)
while True:
input_state = GPIO.input(14)
if input_state == False and input_state != last_state:
print 'Button pressed'
GPIO.output(4, ~last_led_state)
last_led_state = ~last_led_state
last_state = input_state
sleep(0.1)
GPIO.wait_for_edge(15, GPIO.RISING)
print "blah"
except KeyboardInterrupt:
GPIO.output(4, False)
GPIO.output(ledPin, False)
finally:
GPIO.cleanup()

10
led.py
View file

@ -6,17 +6,19 @@ import RPi.GPIO as GPIO
print 'blah'
pin = 14
try:
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.setup(pin, GPIO.OUT)
while True:
GPIO.output(4, 1)
GPIO.output(pin, 1)
sleep(1)
GPIO.output(4, 0)
GPIO.output(pin, 0)
sleep(1)
except KeyboardInterrupt:
GPIO.output(4, 0)
GPIO.output(pin, 0)
finally:
GPIO.cleanup()