162 lines
4.6 KiB
ReStructuredText
162 lines
4.6 KiB
ReStructuredText
Introduction
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============
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.. image:: https://readthedocs.org/projects/adafruit-circuitpython-ek79686/badge/?version=latest
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:target: https://docs.circuitpython.org/projects/ek79686/en/latest/
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:alt: Documentation Status
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.. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg
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:target: https://adafru.it/discord
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:alt: Discord
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.. image:: https://github.com/adafruit/Adafruit_CircuitPython_EK79686/workflows/Build%20CI/badge.svg
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:target: https://github.com/adafruit/Adafruit_CircuitPython_EK79686/actions
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:alt: Build Status
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.. image:: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json
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:target: https://github.com/astral-sh/ruff
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:alt: Code Style: Ruff
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CircuitPython `displayio` driver for EK79686-based ePaper displays
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Dependencies
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=============
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This driver depends on:
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* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
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Please ensure all dependencies are available on the CircuitPython filesystem.
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This is easily achieved by downloading
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`the Adafruit library and driver bundle <https://circuitpython.org/libraries>`_
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or individual libraries can be installed using
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`circup <https://github.com/adafruit/circup>`_.
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Installing from PyPI
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=====================
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On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
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PyPI <https://pypi.org/project/adafruit-circuitpython-ek79686/>`_.
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To install for current user:
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.. code-block:: shell
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pip3 install adafruit-circuitpython-ek79686
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To install system-wide (this may be required in some cases):
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.. code-block:: shell
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sudo pip3 install adafruit-circuitpython-ek79686
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To install in a virtual environment in your current project:
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.. code-block:: shell
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mkdir project-name && cd project-name
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python3 -m venv .venv
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source .env/bin/activate
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pip3 install adafruit-circuitpython-ek79686
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Installing to a Connected CircuitPython Device with Circup
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==========================================================
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Make sure that you have ``circup`` installed in your Python environment.
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Install it with the following command if necessary:
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.. code-block:: shell
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pip3 install circup
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With ``circup`` installed and your CircuitPython device connected use the
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following command to install:
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.. code-block:: shell
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circup install adafruit_ek79686
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Or the following command to update an existing version:
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.. code-block:: shell
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circup update
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Usage Example
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=============
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.. code-block:: python
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import time
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import board
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import displayio
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from fourwire import FourWire
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import adafruit_ek79686
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# Used to ensure the display is free in CircuitPython
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displayio.release_displays()
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# Define the pins needed for display use on the Metro
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spi = board.SPI()
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epd_cs = board.D10
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epd_dc = board.D9
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epd_reset = board.D5
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epd_busy = board.D6
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# Create the displayio connection to the display pins
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display_bus = FourWire(spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000)
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time.sleep(1) # Wait a bit
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# Create the display object - the third color is red (0xff0000)
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display = adafruit_ek79686.EK79686(
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display_bus,
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width=264,
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height=176,
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busy_pin=epd_busy,
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highlight_color=0xFF0000,
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rotation=90,
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)
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# Create a display group for our screen objects
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g = displayio.Group()
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# Display a ruler graphic from the root directory of the CIRCUITPY drive
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pic = displayio.OnDiskBitmap("/display-ruler.bmp")
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# Create a Tilegrid with the bitmap and put in the displayio group
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t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
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g.append(t)
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# Place the display group on the screen (does not refresh)
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display.root_group = g
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# Show the image on the display
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display.refresh()
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print("refreshed")
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# Do Not refresh the screen more often than every 180 seconds
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# for eInk displays! Rapid refreshes will damage the panel.
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time.sleep(180)
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Documentation
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=============
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API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/ek79686/en/latest/>`_.
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For information on building library documentation, please check out
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`this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>`_.
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Contributing
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============
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Contributions are welcome! Please read our `Code of Conduct
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<https://github.com/adafruit/Adafruit_CircuitPython_EK79686/blob/HEAD/CODE_OF_CONDUCT.md>`_
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before contributing to help this project stay welcoming.
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