Honey
7c197e20a5
Was importing 'waveshare_epd' as a top-level package, but it's nested under display/waveshare_epd/ -- caused ModuleNotFoundError on the Pi since only display/ is on sys.path via main.py's imports, not display/waveshare_epd/ itself. Verified the corrected import resolves by exercising it directly; the only error left is the driver's own platform check falling through to its Jetson Nano path on this non-Pi dev machine, which is expected here and won't happen on the real Raspberry Pi (it checks /proc/cpuinfo for "Raspberry").
55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
"""Driver for the Waveshare epd4in0e (4", 6-color Spectra) panel.
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Thin wrapper around the vendored `waveshare_epd.epd4in0e` module -- the exact
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driver already proven working under the InkyPi install on this Pi. That
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driver only exposes `Clear()` and `display()`, both of which do a full
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`TurnOnDisplay()` flash cycle; there is no partial-refresh path for this
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panel at the hardware/SDK level, confirmed by reading the driver itself.
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"""
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import logging
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from display import Display
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logger = logging.getLogger(__name__)
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RESOLUTION = (400, 600)
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class EPD4in0eDisplay(Display):
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def __init__(self):
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self.resolution = RESOLUTION
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self._epd = None
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def init(self) -> None:
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from display.waveshare_epd import epd4in0e
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self._epd = epd4in0e.EPD()
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self._epd.init()
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logger.info("epd4in0e initialized")
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def show(self, image) -> None:
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if self._epd is None:
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self.init()
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width, height = self.resolution
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if image.size != (width, height):
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raise ValueError(
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f"Image size {image.size} does not match panel resolution {self.resolution}"
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)
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# Re-init: the panel goes to sleep after every show(), and needs a
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# fresh init() before it will accept commands again.
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self._epd.init()
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# Clear first to avoid ghosting from the previous image -- also a
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# full flash, there's no way around it on this panel.
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self._epd.Clear()
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self._epd.display(self._epd.getbuffer(image.convert("RGB")))
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def sleep(self) -> None:
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if self._epd is not None:
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self._epd.sleep()
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logger.info("epd4in0e put to sleep")
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