Simple test

Ensure your device works with this simple test.

examples/ssd1608_simpletest.py
 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4"""Simple test script for 1.54" 200x200 monochrome display.
 5
 6Supported products:
 7  * Adafruit 1.54" Monochrome ePaper Display Breakout
 8    * https://www.adafruit.com/product/4196
 9  """
10
11import time
12import board
13import displayio
14import adafruit_ssd1608
15
16displayio.release_displays()
17
18# This pinout works on a Feather M4 and may need to be altered for other boards.
19spi = board.SPI()  # Uses SCK and MOSI
20epd_cs = board.D9
21epd_dc = board.D10
22epd_reset = board.D5
23epd_busy = board.D6
24
25display_bus = displayio.FourWire(
26    spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000
27)
28time.sleep(1)
29
30display = adafruit_ssd1608.SSD1608(
31    display_bus, width=200, height=200, busy_pin=epd_busy, rotation=180
32)
33
34g = displayio.Group()
35
36with open("/display-ruler.bmp", "rb") as f:
37    pic = displayio.OnDiskBitmap(f)
38    # CircuitPython 6 & 7 compatible
39    t = displayio.TileGrid(
40        pic, pixel_shader=getattr(pic, "pixel_shader", displayio.ColorConverter())
41    )
42    # CircuitPython 7 compatible only
43    # t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
44    g.append(t)
45
46    display.show(g)
47
48    display.refresh()
49
50    print("refreshed")
51
52    time.sleep(120)