adafruit-circuitpython-il91874 2.0.2

CircuitPython `displayio` driver for IL91874-based ePaper displays

Introduction

CircuitPython displayio driver for IL91874-based ePaper displays

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-il91874

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-il91874

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-il91874

Usage Example

"""Simple test script for 2.7" 264x176 Tri-Color display shield

Supported products:
  * Adafruit 2.7" Tri-Color ePaper Display Shield
    * https://www.adafruit.com/product/4229
  """

import time
import board
import busio
import displayio
import fourwire
import adafruit_il91874

displayio.release_displays()

spi = board.SPI()
epd_cs = board.D10
epd_dc = board.D9

display_bus = fourwire.FourWire(spi, command=epd_dc, chip_select=epd_cs, baudrate=1000000)
time.sleep(1)

display = adafruit_il91874.IL91874(display_bus, width=264, height=176, highlight_color=0xff0000, rotation=90)

g = displayio.Group()

pic = displayio.OnDiskBitmap("/display-ruler.bmp")
# Create a Tilegrid with the bitmap and put in the displayio group
t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
g.append(t)

# Place the display group on the screen (does not refresh)
display.root_group = g

# Show the image on the display
display.refresh()

print("refreshed")

# Do Not refresh the screen more often than every 180 seconds
#   for eInk displays! Rapid refreshes will damage the panel.
time.sleep(180)

Documentation

API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.