Introduction
CircuitPython displayio
driver for US8151D-based ePaper displays
Dependencies
This driver depends on:
Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle or individual libraries can be installed using circup.
Adafruit 2.9” Flexible 296x128 Monochrome eInk / ePaper Display
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-uc8151d
To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-uc8151d
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-uc8151d
Installing to a Connected CircuitPython Device with Circup
Make sure that you have circup
installed in your Python environment.
Install it with the following command if necessary:
pip3 install circup
With circup
installed and your CircuitPython device connected use the
following command to install:
circup install adafruit_uc8151d
Or the following command to update an existing version:
circup update
Usage Example
import time
import board
import displayio
import fourwire
import adafruit_uc8151d
displayio.release_displays()
# This pinout works on a Feather M4 and may need to be altered for other boards.
spi = board.SPI() # Uses SCK and MOSI
epd_cs = board.D9
epd_dc = board.D10
epd_reset = board.D5
epd_busy = None
display_bus = fourwire.FourWire(
spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000
)
time.sleep(1)
display = adafruit_uc8151d.UC8151D(
display_bus, width=296, height=128, rotation=90, busy_pin=epd_busy
)
g = displayio.Group()
with open("/display-ruler.bmp", "rb") as f:
pic = displayio.OnDiskBitmap(f)
t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
g.append(t)
display.root_group = g
display.refresh()
time.sleep(120)
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.
Table of Contents
Adafruit 2.9” eInk Display Breakouts and FeatherWings <https://learn.adafruit.com/adafruit-2-9-eink-display-breakouts-and-featherwings>
Adafruit 2.9” Flexible 296x128 Monochrome eInk / ePaper Display <https://www.adafruit.com/product/4262>