Introduction
============

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    :target: https://circuitpython.readthedocs.io/projects/epd/en/latest/
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    :target: https://travis-ci.com/adafruit/Adafruit_CircuitPython_EPD
    :alt: Build Status

This library is for using CircuitPython with e-ink displays with built in SRAM.

Dependencies
=============
This driver depends on:

* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
* `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
* `font5x8.bin found in the examples bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_

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>`_.

Usage Example
=============

.. code-block:: python

    import digitalio
    import busio
    import board
    from adafruit_epd.epd import Adafruit_EPD
    from adafruit_epd.il0373 import Adafruit_IL0373

    # create the spi device and pins we will need
    spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
    ecs = digitalio.DigitalInOut(board.D12)
    dc = digitalio.DigitalInOut(board.D11)
    srcs = digitalio.DigitalInOut(board.D10)    # can be None to use internal memory
    rst = digitalio.DigitalInOut(board.D9)    # can be None to not use this pin
    busy = digitalio.DigitalInOut(board.D5)   # can be None to not use this pin

    # give them all to our driver
    print("Creating display")
    display = Adafruit_IL0373(104, 212, spi,          # 2.13" Tri-color display
                              cs_pin=ecs, dc_pin=dc, sramcs_pin=srcs,
                              rst_pin=rst, busy_pin=busy)

    display.rotation = 1

    # clear the buffer
    print("Clear buffer")
    display.fill(Adafruit_EPD.WHITE)
    display.pixel(10, 100, Adafruit_EPD.BLACK)

    print("Draw Rectangles")
    display.fill_rect(5, 5, 10, 10, Adafruit_EPD.RED)
    display.rect(0, 0, 20, 30, Adafruit_EPD.BLACK)

    print("Draw lines")
    display.line(0, 0, display.width-1, display.height-1, Adafruit_EPD.BLACK)
    display.line(0, display.height-1, display.width-1, 0, Adafruit_EPD.RED)

    print("Draw text")
    display.text('hello world', 25, 10, Adafruit_EPD.BLACK)
    display.display()


Contributing
============

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

Building locally
================

Zip release files
-----------------

To build this library locally you'll need to install the
`circuitpython-build-tools <https://github.com/adafruit/circuitpython-build-tools>`_ package.

.. code-block:: shell

    python3 -m venv .env
    source .env/bin/activate
    pip install circuitpython-build-tools

Once installed, make sure you are in the virtual environment:

.. code-block:: shell

    source .env/bin/activate

Then run the build:

.. code-block:: shell

    circuitpython-build-bundles --filename_prefix adafruit-circuitpython-epd --library_location .

Sphinx documentation
-----------------------

Sphinx is used to build the documentation based on rST files and comments in the code. First,
install dependencies (feel free to reuse the virtual environment from above):

.. code-block:: shell

    python3 -m venv .env
    source .env/bin/activate
    pip install Sphinx sphinx-rtd-theme

Now, once you have the virtual environment activated:

.. code-block:: shell

    cd docs
    sphinx-build -E -W -b html . _build/html

This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
locally verify it will pass.