57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
# SPDX-FileCopyrightText: 2025 Scott Shawcroft, written for Adafruit Industries
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# SPDX-FileCopyrightText: Copyright (c) 2021 Melissa LeBlanc-Williams for Adafruit Industries
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#
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# SPDX-License-Identifier: Unlicense
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"""Simple test script for 4.2" 400x300 monochrome display (ThinkInk_420_Grayscale4_MFGN)."""
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import time
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import board
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import busio
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import displayio
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from fourwire import FourWire
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import adafruit_ssd1683
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displayio.release_displays()
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# This pinout works on a MagTag with the newer screen and may need to be altered for other boards.
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spi = busio.SPI(board.EPD_SCK, board.EPD_MOSI) # Uses SCK and MOSI
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epd_cs = board.EPD_CS
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epd_dc = board.EPD_DC
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epd_reset = board.EPD_RESET
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epd_busy = board.EPD_BUSY
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display_bus = FourWire(spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000)
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time.sleep(1)
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display = adafruit_ssd1683.SSD1683(
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display_bus,
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width=400,
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height=300,
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busy_pin=epd_busy
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)
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g = displayio.Group()
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pic = displayio.OnDiskBitmap("/display-ruler-1280x720.bmp")
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t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
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g.append(t)
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display.root_group = g
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display.refresh()
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print("refreshed")
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time.sleep(display.time_to_refresh + 5)
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# Always refresh a little longer. It's not a problem to refresh
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# a few seconds more, but it's terrible to refresh too early
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# (the display will throw an exception when if the refresh
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# is too soon)
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print("waited correct time")
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# Keep the display the same
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while True:
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time.sleep(10)
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