Created
November 1, 2017 19:13
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Raspberry Pi Zero Halloween project code: animate text on an OLED display and blink LEDs
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import math | |
import time | |
import random | |
import Adafruit_GPIO.SPI as SPI | |
import Adafruit_SSD1306 | |
from PIL import Image | |
from PIL import ImageFont | |
from PIL import ImageDraw | |
import RPi.GPIO as GPIO | |
#import logging | |
#logging.basicConfig(level=logging.DEBUG) | |
class LEDS: | |
def __init__(self): | |
#LED_PINS = [11, 12, 13, 15, 16, 22, 29, 31, 32] | |
self.PINS = [17, 18, 27, 22, 23, 25, 5, 6, 12] | |
GPIO.setmode(GPIO.BCM) | |
GPIO.setup(self.PINS, GPIO.OUT) | |
self.state = 0 | |
def random_pattern(self): | |
for n in self.PINS: | |
GPIO.output(n, random.randint(0,1)) | |
class OLED: | |
def __init__(self): | |
self.RESET_PIN = 24 | |
self.disp = Adafruit_SSD1306.SSD1306_128_32(rst=self.RESET_PIN) | |
self.font = ImageFont.truetype('c.ttf', 32) | |
self.disp.begin() | |
self.disp.clear() | |
self.disp.display() | |
self.setText('ERROR! Text not set!') | |
self.textpos = 0 | |
def setText(self, text): | |
image = Image.new('1', (self.disp.width, self.disp.height)) | |
draw = ImageDraw.Draw(image) | |
self.maxwidth, unused = draw.textsize(text, font=self.font) | |
self.FullTextImage = Image.new('1', (self.maxwidth+2*self.disp.width, self.disp.height)) | |
self.FTIdraw = ImageDraw.Draw(self.FullTextImage) | |
self.FTIdraw.text((self.disp.width, 0), text, font=self.font, fill=255) | |
def animate(self, speed=2): | |
section = self.FullTextImage.crop((self.textpos, 0, self.textpos+self.disp.width, self.disp.height)) | |
self.disp.image(section) | |
self.disp.display() | |
self.textpos = self.textpos+speed | |
if self.textpos>(self.maxwidth+self.disp.width): | |
self.textpos = 0 | |
####### MAIN ########### | |
leds = LEDS() | |
disp = OLED() | |
disp.setText('Ich bin ROBOTER <add name here>’) | |
counter = 0 | |
while True: | |
tstamp = time.time() | |
disp.animate() | |
if counter>9: | |
leds.random_pattern() | |
counter = 0 | |
counter = counter+1 | |
sleeptime = 0.01 - (time.time()-tstamp) | |
if sleeptime>0: | |
time.sleep(sleeptime) |
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