clean.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import argparse
import time

from inky.auto import auto
from PIL import Image

print("""Inky pHAT: Clean

Displays solid blocks of red, black, and white to clean the Inky pHAT
display of any ghosting.

""")

inky_display = auto(ask_user=True, verbose=True)

# Command line arguments to determine number of cycles to run
parser = argparse.ArgumentParser()
parser.add_argument('--number', '-n', type=int, required=False, help="number of cycles")
args, _ = parser.parse_known_args()

# The number of red / black / white refreshes to run

if args.number:
    cycles = args.number
else:
    cycles = 3

colours = (inky_display.RED, inky_display.BLACK, inky_display.WHITE)
colour_names = (inky_display.colour, "black", "white")

# Create a new canvas to draw on

img = Image.new("P", (inky_display.WIDTH, inky_display.HEIGHT))

# Loop through the specified number of cycles and completely
# fill the display with each colour in turn.

for i in range(cycles):
    print("Cleaning cycle %i\n" % (i + 1))
    for j, c in enumerate(colours):
        print("- updating with %s" % colour_names[j])
        inky_display.set_border(c)
        for x in range(inky_display.WIDTH):
            for y in range(inky_display.HEIGHT):
                img.putpixel((x, y), c)
        inky_display.set_image(img)
        inky_display.show()
        time.sleep(1)
    print("\n")

print("Cleaning complete!")