66 lines
1.7 KiB
Python
66 lines
1.7 KiB
Python
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
"""
|
|
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
|
|
|
|
This program only requires the adafruit_il91874 library in /lib
|
|
for CircuitPython 5.0 and above which has displayio support.
|
|
"""
|
|
|
|
import time
|
|
|
|
import board
|
|
import displayio
|
|
from fourwire import FourWire
|
|
|
|
import adafruit_il91874
|
|
|
|
# Used to ensure the display is free in CircuitPython
|
|
displayio.release_displays()
|
|
|
|
# Define the pins needed for display use on the Metro
|
|
spi = board.SPI()
|
|
epd_cs = board.D10
|
|
epd_dc = board.D9
|
|
epd_reset = board.D5
|
|
epd_busy = board.D6
|
|
|
|
# Create the displayio connection to the display pins
|
|
display_bus = FourWire(spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000)
|
|
time.sleep(1) # Wait a bit
|
|
|
|
# Create the display object - the third color is red (0xff0000)
|
|
display = adafruit_il91874.IL91874(
|
|
display_bus,
|
|
width=264,
|
|
height=176,
|
|
busy_pin=epd_busy,
|
|
highlight_color=0xFF0000,
|
|
rotation=90,
|
|
)
|
|
|
|
# Create a display group for our screen objects
|
|
g = displayio.Group()
|
|
|
|
# Display a ruler graphic from the root directory of the CIRCUITPY drive
|
|
|
|
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)
|