adafruit-circuitpython-il91874

Introduction

.. image:: https://readthedocs.org/projects/adafruit-circuitpython-il91874/badge/?version=latest :target: https://docs.circuitpython.org/projects/il91874/en/latest/ :alt: Documentation Status

.. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg :target: https://adafru.it/discord :alt: Discord

.. image:: https://github.com/adafruit/Adafruit_CircuitPython_IL91874/workflows/Build%20CI/badge.svg :target: https://github.com/adafruit/Adafruit_CircuitPython_IL91874/actions :alt: Build Status

.. image:: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json :target: https://github.com/astral-sh/ruff :alt: Code Style: Ruff

CircuitPython displayio driver for IL91874-based ePaper displays

Dependencies

This driver depends on:

• Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>_.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/adafruit-circuitpython-il91874/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-il91874

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

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-il91874

To install in a virtual environment in your current project:

.. code-block:: shell

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

Usage Example

.. code-block:: python

"""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 <https://docs.circuitpython.org/projects/il91874/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_IL91874/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.