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hzeller / rpi-rgb-led-matrix

Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
GNU General Public License v2.0
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Can't figure out correct settings for my display #1017

Closed gingters closed 4 years ago

gingters commented 4 years ago

Hi,

I connected one of my two 32x16 panels with the ElectroDragon board linked on the adapter page. My panel has P10-4S-3535-3216-JA1 printed on the back. The connectors are labeled with HUB75D. I ordered it as an outdoor panel, because I think I need bright panels.

I sadly can't read what's actually written on the IC's, as this is way too small: I don't have reasonable magnifying glasses and my phone cam can't zoom in enough for it to become readable.

I attached the panel to the first output, where the upper chain (the first one) should be connected. When I run the demo, I only see wildly shuffled parts of the cube on the panel.

I used --led-rows=16 --led-cols=32 --led-chain=1 --led-parallel=1 and I tried all 11 --led-multiplexing options with pretty all 3 --led-panel-type settings (default, FM6126A and DM6127).

What should I do now? Do I need my own multiplexing? If yes, how can I figure that out? Do I need to set individual pixels, create some sort of map where they actually show up and move them around accordingly? I'm a bit lost at the moment, sadly :(

Edit update: On the adapter board I did not solder anything. So P8 and P4 are not bound to GND nor E. Is that a problem? I thought since I don't have a 64x64 outdoor matrix I don't need the E line.

hzeller commented 4 years ago

When you first connect it, make sure to slow down gpio to not have artifacts due to that, --led-slowdown-gpio=3 or so.

Did you level convert the GPIO outputs to 5V ? Not all panels can deal with 3.3V logic level.

Did you also try all --led-row-addr-type ?

Can you provide an image of how the square demo is output on your panel in the 'best' setting you get ? (-D3 on the demo program).

What does the connector plug look like, do you have a picture of the input with the sillkscreen around (Essentially like this image)

gingters commented 4 years ago

Ah, awesome!

It was the missing --led-row-addr-type. With that set to 2 it works when I chose multiplexing setting 5. I did not set slowdown-gpio so far, but will keep that in mind if I have more moving images and see artifacts. So far its fine without that setting.