P10 Outdoor Panel 1/4 Scan Problem

[Xaver88]

Hi there got a P10 outdoor 1/4 scan 32x16 display and can't get ist work it seems that every 4 rows are not in the correct order

https://github.com/hzeller/rpi-rgb-led-matrix/assets/105126414/1a8a0b29-2384-444a-be8f-65a4b48021af

[anandrajgupta]

multiplexing?

[Xaver88]

tried all from 0 to 18, but no success this example is 3

[Xaver88]

for me it seems that row 0-3 and 4-7 are swapped also 8-11 and 12-15 same an the second panel but how to solve this?

[anandrajgupta]

your problem will be solved after a minor tweaking in multiplex-mappers.cc file

[Xaver88]

I'm not firm with cc can you give me a hint or example what to do when I change the led-multiplexer.cc, what's next to get the demo (and python) workung) do I have to "make" the libs again?

[Xaver88]

there is no file led-multiplexer.cc which do you mean?

[anandrajgupta]

https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/lib/multiplex-mappers.cc

yes you have compile the libraries again

[Xaver88]

tried to change and complie it. Output on the display changes, but (at the moment) I don't understand how the multiplex mapper and the pixelmapper works

[anandrajgupta]

trial and error

map each x,y coordinates

[davemaster]

Hi there got a P10 outdoor 1/4 scan 32x16 display and can't get ist work it seems that every 4 rows are not in the correct order VID-20231001-WA0010.mp4

Greetings,

What command are You trying?

ex. sudo demo --led-cols=32 --led-rows=16 --led-multiplexing=8 -D 0 (the 8 works for my 32x16 1/4 scan outdoor P10)

[Xaver88]

Hi there got a P10 outdoor 1/4 scan 32x16 display and can't get ist work it seems that every 4 rows are not in the correct order VID-20231001-WA0010.mp4

Greetings,

What command are You trying?

ex. sudo demo --led-cols=32 --led-rows=16 --led-multiplexing=8 -D 0 (the 8 works for my 32x16 1/4 scan outdoor P10)

I tried all combinations and the mutliplexing=3 or 13 brings the shown video also asked the manufacrurer for a pixelmapping but get no answer (until now)

[davemaster]

Hi there got a P10 outdoor 1/4 scan 32x16 display and can't get ist work it seems that every 4 rows are not in the correct order VID-20231001-WA0010.mp4

Greetings, What command are You trying? ex. sudo demo --led-cols=32 --led-rows=16 --led-multiplexing=8 -D 0 (the 8 works for my 32x16 1/4 scan outdoor P10)

I tried all combinations and the mutliplexing=3 or 13 brings the shown video also asked the manufacrurer for a pixelmapping but get no answer (until now)

Can You please take a picture of the back of rgb panel?

[anandrajgupta]

led-multiplexing=4 worked for my P10 4 Scan 16×32. May try tweaking other parameters keeping this multiplexer=4

[Xaver88]

get it work with a little twaek in the mapping but how to compile (MAKE ?) that also the python examples will work now?

[anandrajgupta]

i am not sure about the python one, i used C