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@fvdbosch /ebadge.py Secret
Last active Mar 12, 2017

What would you like to do?
Pi Zero ePaper Badge
#!/usr/bin/env python
import os
import RPi.GPIO as GPIO
from papirus import PapirusImage
from time import sleep, time
from PIL import Image
# Run as root
user = os.getuid()
if user != 0:
print "Please run script as root"
sys.exit()
# Set up GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(16, GPIO.IN)
GPIO.setup(26, GPIO.IN)
GPIO.setup(20, GPIO.IN)
GPIO.setup(21, GPIO.IN)
image = PapirusImage()
# picture folder
projects = "/home/pi/images/"
paths = []
current_index = 0
previous_index = -1
slideshow = 0
last_execution = 0
# populate image list
for filename in os.listdir(projects):
paths.append(projects + filename)
def my_callback(channel):
global current_index, previous_index, slideshow
slideshow = 0
# display first image
if(channel == 16):
current_index = 0
# display second image
elif(channel == 26):
current_index = 1
# display all images except first two
elif(channel == 20):
if(current_index < 2):
current_index = 2
else:
current_index = current_index + 1
if(current_index > len(paths) - 1):
current_index = 2
# start slideshow of all images
elif(channel == 21):
slideshow = 1
def display_image():
# Write image to display if it has changed
global current_index, previous_index
if(current_index != previous_index):
image.write(projects + str(current_index) + ".bmp")
previous_index = current_index
def increment():
# Find next image index to display
global current_index, previous_index, last_execution
current_index = current_index + 1
if(current_index > len(paths) - 1):
current_index = 0
last_execution = time()
def main():
while(1):
now = time()
# If slideshow mode, automatically switch images
if(slideshow == 1 and now - last_execution > 10):
increment()
display_image()
sleep(0.1)
# Wait for button presses
GPIO.add_event_detect(16, GPIO.FALLING, callback=my_callback, bouncetime=300)
GPIO.add_event_detect(26, GPIO.FALLING, callback=my_callback, bouncetime=300)
GPIO.add_event_detect(20, GPIO.FALLING, callback=my_callback, bouncetime=300)
GPIO.add_event_detect(21, GPIO.FALLING, callback=my_callback, bouncetime=300)
if __name__ == '__main__':
main()
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