adding eink demos for bonnet

Author: BlitzCityDIY

E-Ink_Bonnet_Examples/Blinka_EPD_Demo/code.py

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+# SPDX-FileCopyrightText: 2019 Melissa LeBlanc-Williams for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+ePaper Display Shapes and Text demo using the Pillow Library.
+
+"""
+
+import board
+import busio
+import digitalio
+from PIL import Image, ImageDraw, ImageFont
+from adafruit_epd.epd import Adafruit_EPD
+from adafruit_epd.uc8179 import Adafruit_UC8179
+
+# First define some color constants
+WHITE = (0xFF, 0xFF, 0xFF)
+BLACK = (0x00, 0x00, 0x00)
+RED = (0xFF, 0x00, 0x00)
+
+# Next define some constants to allow easy resizing of shapes and colors
+BORDER = 20
+FONTSIZE = 24
+BACKGROUND_COLOR = BLACK
+FOREGROUND_COLOR = WHITE
+TEXT_COLOR = RED
+
+# create the spi device and pins we will need
+spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+ecs = digitalio.DigitalInOut(board.CE0)
+dc = digitalio.DigitalInOut(board.D22)
+srcs = None
+rst = digitalio.DigitalInOut(board.D27)
+busy = digitalio.DigitalInOut(board.D17)
+
+
+display = Adafruit_UC8179(         # 7.5" tricolor 800x480 display
+    800,
+    480,
+    spi,
+    cs_pin=ecs,
+    dc_pin=dc,
+    sramcs_pin=srcs,
+    rst_pin=rst,
+    busy_pin=busy,
+    tri_color = True)
+
+width = display.width
+height = display.height
+image = Image.new("RGB", (width, height))
+
+WHITE = (0xFF, 0xFF, 0xFF)
+RED = (0xFF, 0x00, 0x00)
+BLACK = (0x00, 0x00, 0x00)
+
+# clear the buffer
+display.fill(Adafruit_EPD.WHITE)
+
+# Get drawing object to draw on image.
+draw = ImageDraw.Draw(image)
+# empty it
+draw.rectangle((0, 0, width, height), fill=WHITE)
+
+# Draw an outline box
+draw.rectangle((1, 1, width - 2, height - 2), outline=BLACK, fill=WHITE)
+
+# Draw some shapes.
+# First define some constants to allow easy resizing of shapes.
+padding = 20
+shape_width = 120
+top = padding
+bottom = height - padding
+# Move left to right keeping track of the current x position for drawing shapes.
+x = padding
+# Draw an ellipse.
+draw.ellipse((x, top, x + shape_width, bottom), outline=RED, fill=WHITE)
+x += shape_width + padding
+# Draw a rectangle.
+draw.rectangle((x, top, x + shape_width, bottom), outline=RED, fill=BLACK)
+x += shape_width + padding
+# Draw a triangle.
+draw.polygon(
+    [(x, bottom), (x + shape_width / 2, top), (x + shape_width, bottom)],
+    outline=BLACK,
+    fill=RED,
+)
+x += shape_width + padding
+# Draw an X.
+draw.line((x, bottom, x + shape_width, top), fill=BLACK)
+draw.line((x, top, x + shape_width, bottom), fill=RED)
+x += shape_width + padding
+
+# Load default font.
+font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 40)
+
+draw.text((x, top), "Hello", font=font, fill=BLACK)
+draw.text((x, top + 40), "World!", font=font, fill=BLACK)
+
+# Display image.
+display.image(image)
+
+display.display()

E-Ink_Bonnet_Examples/Blinka_EPD_Pillow_Image/blinka.png

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+# SPDX-FileCopyrightText: 2019 Melissa LeBlanc-Williams for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+Image resizing and drawing using the Pillow Library
+"""
+import board
+import busio
+import digitalio
+from PIL import Image
+from adafruit_epd.uc8179 import Adafruit_UC8179
+
+# First define some color constants
+WHITE = (0xFF, 0xFF, 0xFF)
+BLACK = (0x00, 0x00, 0x00)
+RED = (0xFF, 0x00, 0x00)
+
+# Next define some constants to allow easy resizing of shapes and colors
+BORDER = 20
+FONTSIZE = 24
+BACKGROUND_COLOR = BLACK
+FOREGROUND_COLOR = WHITE
+TEXT_COLOR = RED
+
+# create the spi device and pins we will need
+spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+ecs = digitalio.DigitalInOut(board.CE0)
+dc = digitalio.DigitalInOut(board.D22)
+srcs = None
+rst = digitalio.DigitalInOut(board.D27)
+busy = digitalio.DigitalInOut(board.D17)
+
+
+display = Adafruit_UC8179(         # 7.5" tri-color 800x480 display
+    800,
+    480,
+    spi,
+    cs_pin=ecs,
+    dc_pin=dc,
+    sramcs_pin=srcs,
+    rst_pin=rst,
+    busy_pin=busy,
+    tri_color = True)
+
+image = Image.open("blinka.png")
+
+# Scale the image to the smaller screen dimension
+image_ratio = image.width / image.height
+screen_ratio = display.width / display.height
+print(image_ratio, screen_ratio)
+if screen_ratio < image_ratio:
+    scaled_width = image.width * display.height // image.height
+    scaled_height = display.height
+else:
+    scaled_width = display.width
+    scaled_height = image.height * display.width // image.width
+image = image.resize((scaled_width, scaled_height), Image.BICUBIC)
+
+# Crop and center the image
+x = scaled_width // 2 - display.width // 2
+y = scaled_height // 2 - display.height // 2
+image = image.crop((x, y, x + display.width, y + display.height)).convert("RGB")
+
+display.image(image)
+display.display()