Added example for 2.9-inch eInk

examples/il0373_2.9_color.py

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+"""Simple test script for Adafruit 2.9" 296x128 tri-color display
+Supported products:
+  * Adafruit 2.9" Tri-Color Display Breakout
+  * https://www.adafruit.com/product/1028
+"""
+
+import time
+import board
+import displayio
+import adafruit_il0373
+
+# Used to ensure the display is free in CircuitPython
+displayio.release_displays()
+
+# Define the pins needed for display use
+# This pinout is for a Feather M4 and may be different for other boards
+spi = board.SPI()  # Uses SCK and MOSI
+epd_cs = board.D9
+epd_dc = board.D10
+epd_reset = board.D5
+epd_busy = board.D6
+
+# Create the displayio connection to the display pins
+display_bus = displayio.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_il0373.IL0373(display_bus, width=296, height=128,
+                                 rotation=270, busy_pin=epd_busy,
+                                 highlight_color=0xff0000)
+
+# Create a display group for our screen objects
+g = displayio.Group()
+
+# Display a ruler graphic from the root directory of the CIRCUITPY drive
+f = open("/display-ruler.bmp", "rb")
+
+pic = displayio.OnDiskBitmap(f)
+# Create a Tilegrid with the bitmap and put in the displayio group
+t = displayio.TileGrid(pic, pixel_shader=displayio.ColorConverter())
+g.append(t)
+
+# Place the display group on the screen
+display.show(g)
+
+# Refresh the display to have it actually show the image
+# NOTE: Do not refresh eInk displays sooner than 180 seconds
+display.refresh()
+print("refreshed")
+
+time.sleep(180)