Merge pull request #7 from makermelissa/master

Added Pillow Demo

Author: makermelissa

examples/pcd8544_pillow_demo.py

@@ -0,0 +1,68 @@
+"""
+This demo will fill the screen with white, draw a black box on top
+and then print Hello World! in the center of the display
+
+This example is for use on (Linux) computers that are using CPython with
+Adafruit Blinka to support CircuitPython libraries. CircuitPython does
+not support PIL/pillow (python imaging library)!
+"""
+
+import board
+import busio
+import digitalio
+from PIL import Image, ImageDraw, ImageFont
+import adafruit_pcd8544
+
+# Define the Reset Pin
+oled_reset = digitalio.DigitalInOut(board.D4)
+
+# Parameters to Change
+BORDER = 5
+FONTSIZE = 10
+
+spi = busio.SPI(board.SCK, MOSI=board.MOSI)
+dc = digitalio.DigitalInOut(board.D6) # data/command
+cs = digitalio.DigitalInOut(board.CE0) # Chip select
+reset = digitalio.DigitalInOut(board.D5) # reset
+
+display = adafruit_pcd8544.PCD8544(spi, dc, cs, reset)
+
+# Contrast and Brightness Settings
+display.bias = 4
+display.contrast = 60
+
+# Turn on the Backlight LED
+backlight = digitalio.DigitalInOut(board.D13) # backlight
+backlight.switch_to_output()
+backlight.value = True
+
+# Clear display.
+display.fill(0)
+display.show()
+
+# Create blank image for drawing.
+# Make sure to create image with mode '1' for 1-bit color.
+image = Image.new('1', (display.width, display.height))
+
+# Get drawing object to draw on image.
+draw = ImageDraw.Draw(image)
+
+# Draw a white background
+draw.rectangle((0, 0, display.width, display.height), outline=255, fill=255)
+
+# Draw a smaller inner rectangle
+draw.rectangle((BORDER, BORDER, display.width - BORDER - 1, display.height - BORDER - 1),
+               outline=0, fill=0)
+
+# Load a TTF font.
+font = ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf', FONTSIZE)
+
+# Draw Some Text
+text = "Hello World!"
+(font_width, font_height) = font.getsize(text)
+draw.text((display.width//2 - font_width//2, display.height//2 - font_height//2),
+          text, font=font, fill=255)
+
+# Display image
+display.image(image)
+display.show()