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small red dots appear inside every pixel on 64x64x adafruit led, with adafrui hat, and rpi 4 #1758

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talsan opened this issue Jan 29, 2025 · 0 comments

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@talsan
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talsan commented Jan 29, 2025

Image

does anyone know what is happening here? Let me know if I need to provide more info

raspberry pi 4B, connected to an adafruit hat (soldered the E and 8 together), connected to a adafruit 64x64x led matrix.

in the picture above, the dots are supposed to be green. and they are... but with that dang red dot. also happens when I run the runtext.py example.

when i run the following sudo examples-api-use/demo -D5 --led-gpio-mapping='adafruit-hat' --led-cols=64 --led-rows =64... the red dots DO NOT appear on pure green or blue squares, but do appear in every pixel on the white square and the red square.

doing more testing, basically anytime the R in RGB is >0, it gets that sharp red dot. like it doesn't know how to modulate the brightness/intensity of Red.

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