Python3 Binding - massive ghosting / flickering

1

Hello!
I’ve tried the python3 Binding, just like described here: rpi-rgb-led-matrix/bindings/python at master · hzeller/rpi-rgb-led-matrix · GitHub

While it installs just fine, the examples shows some massive ghosting and flickering, e.g. if I run sudo ./runtext.py --led-rows=64 --led-cols=64, or sudo ./simple-square.py --led-rows=64 --led-cols=64 example

With the standard C API like sudo ./demo -D 1 runtext.ppm --led-rows=64 --led-cols=64 everything looks great, no flickering at all.

Has anyone an idea, what could cause this issue?

Thanks!

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2

It looks like you’re using all the default options, and maybe the defaults are not the same with python

Start with this

~/rpi-rgb-led-matrix/examples-api-use/demo --led-panel-type=FM6126 --led-rows=64 --led-cols=128 --led-chain=1 --led-parallel=3 --led-show-refresh --led-scan-mode=0 --led-pwm-bits=7 --led-pwm-lsb-nanoseconds=50 -D0 --led-row-addr-type=5 --led-slowdown-gpio=3 --led-pwm-dither-bits=1

Tune all the values to what works for you, and then put the same values into the python command.

Hopefully that will work.