57 lines
2.2 KiB
Python
Executable file
57 lines
2.2 KiB
Python
Executable file
# Minimal example displaying an image tiled across multiple RGB LED matrices.
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# This is written for MatrixPortal and four 64x32 pixel matrices, but could
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# be adapted to different boards and matrix combinations.
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# No additional libraries required, just uses displayio.
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# Image wales.bmp should be in CIRCUITPY root directory.
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import board
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import displayio
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import framebufferio
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import rgbmatrix
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displayio.release_displays() # Release current display, we'll create our own
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# Create RGB matrix object for a chain of four 64x32 matrices tiled into
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# a single 128x64 pixel display -- two matrices across, two down, with the
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# second row being flipped. width and height args are the combined size of
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# all the tiled sub-matrices. tile arg is the number of rows of matrices in
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# the chain (horizontal tiling is implicit from the width argument, doesn't
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# need to be specified, but vertical tiling must be explicitly stated).
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# The serpentine argument indicates whether alternate rows are flipped --
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# cabling is easier this way, downside is colors may be slightly different
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# when viewed off-angle. bit_depth and pins are same as other examples.
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MATRIX = rgbmatrix.RGBMatrix(
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width=128, height=64, bit_depth=6, tile=2, serpentine=True,
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rgb_pins=[board.MTX_R1,
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board.MTX_G1,
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board.MTX_B1,
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board.MTX_R2,
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board.MTX_G2,
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board.MTX_B2],
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addr_pins=[board.MTX_ADDRA,
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board.MTX_ADDRB,
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board.MTX_ADDRC,
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board.MTX_ADDRD],
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clock_pin=board.MTX_CLK, latch_pin=board.MTX_LAT,
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output_enable_pin=board.MTX_OE)
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# Associate matrix with a Display to use displayio features
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DISPLAY = framebufferio.FramebufferDisplay(MATRIX, auto_refresh=False,
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rotation=0)
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# Load BMP image, create Group and TileGrid to hold it
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BITMAP = displayio.OnDiskBitmap(open('wales.bmp', 'rb'))
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GROUP = displayio.Group()
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GROUP.append(displayio.TileGrid(
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BITMAP,
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pixel_shader=getattr(BITMAP, 'pixel_shader', displayio.ColorConverter()),
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width=1,
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height=1,
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tile_width=BITMAP.width,
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tile_height=BITMAP.height))
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DISPLAY.show(GROUP)
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DISPLAY.refresh()
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# Nothing interactive, just hold the image there
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while True:
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pass
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