56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
"""
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Simple test script for 2.7" 264x176 Tri-Color display shield
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Supported products:
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* Adafruit 2.7" Tri-Color ePaper Display Shield
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https://www.adafruit.com/product/4229
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This program only requires the adafruit_il91874 library in /lib
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for CircuitPython 5.0 and above which has displayio support.
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"""
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import time
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import board
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import displayio
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import adafruit_il91874
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# Used to ensure the display is free in CircuitPython
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displayio.release_displays()
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# Define the pins needed for display use on the Metro
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spi = board.SPI()
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epd_cs = board.D10
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epd_dc = board.D9
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# Create the displayio connection to the display pins
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display_bus = displayio.FourWire(
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spi, command=epd_dc, chip_select=epd_cs, baudrate=1000000
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)
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time.sleep(1) # Wait a bit
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# Create the display object - the third color is red (0xff0000)
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display = adafruit_il91874.IL91874(
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display_bus, width=264, height=176, highlight_color=0xFF0000, rotation=90
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)
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# Create a display group for our screen objects
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g = displayio.Group()
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# Display a ruler graphic from the root directory of the CIRCUITPY drive
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f = open("/display-ruler.bmp", "rb")
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pic = displayio.OnDiskBitmap(f)
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# Create a Tilegrid with the bitmap and put in the displayio group
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t = displayio.TileGrid(pic, pixel_shader=displayio.ColorConverter())
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g.append(t)
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# Place the display group on the screen (does not refresh)
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display.show(g)
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# Show the image on the display
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display.refresh()
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print("refreshed")
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# Do Not refresh the screen more often than every 180 seconds
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# for eInk displays! Rapid refreshes will damage the panel.
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time.sleep(180)
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