46 lines
1.0 KiB
Python
46 lines
1.0 KiB
Python
|
#!/usr/bin/python
|
||
|
|
|
||
|
|
from time import sleep
|
||
|
|
|
||
|
|
import RPi.GPIO as GPIO
|
||
|
|
|
||
|
|
yellowLed = 15
|
||
|
|
redLed = 17
|
||
|
|
greenLed = 18
|
||
|
|
|
||
|
|
buttonPin = 27
|
||
|
|
|
||
|
|
sleepTimes = [0.75, 0.5, 0.25, 0.125, 0.0625]
|
||
|
|
sleepTimeIndex = 0
|
||
|
|
|
||
|
|
def buttonHandler(channel):
|
||
|
|
global sleepTimeIndex
|
||
|
|
print 'button pushed'
|
||
|
|
sleepTimeIndex = (sleepTimeIndex + 1) % len(sleepTimes)
|
||
|
|
|
||
|
|
def setLeds(yellow, red, green):
|
||
|
|
GPIO.output(yellowLed, yellow)
|
||
|
|
GPIO.output(redLed, red)
|
||
|
|
GPIO.output(greenLed, green)
|
||
|
|
|
||
|
|
try:
|
||
|
|
GPIO.setmode(GPIO.BCM)
|
||
|
|
GPIO.setup(yellowLed, GPIO.OUT)
|
||
|
|
GPIO.setup(redLed, GPIO.OUT)
|
||
|
|
GPIO.setup(greenLed, GPIO.OUT)
|
||
|
|
|
||
|
|
GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
|
||
|
|
|
||
|
|
GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)
|
||
|
|
|
||
|
|
while True:
|
||
|
|
setLeds(1, 0, 0)
|
||
|
|
sleep(sleepTimes[sleepTimeIndex])
|
||
|
|
setLeds(0, 1, 0)
|
||
|
|
sleep(sleepTimes[sleepTimeIndex])
|
||
|
|
setLeds(0, 0, 1)
|
||
|
|
sleep(sleepTimes[sleepTimeIndex])
|
||
|
|
finally:
|
||
|
|
setLeds(0, 0, 0)
|
||
|
|
GPIO.cleanup()
|