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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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Potentially new type of LED panel - no output #745

Open manuelgorman opened 5 years ago

manuelgorman commented 5 years ago

Hi,

I bought a couple of LED panels from ebay (these).

When I connect them to my Adafruit LED matrix bonnet, they don't do anything - if I disconnect them while leaving the power on, and reconnect, I get some random junk that resembles one of the demo's, but nothing usable (first image).

The chips are the following: 3x 74HC245C - right next to the data in connector 4x TC7258EN - in the middle, next to the power connector 24x FM6126A - along the edges in banks of 6

Image gallery here

Datasheets: TC7258EN - In Chinese but I can't find an English version, hope its of some use anyway 74HC245C FM6126A - Also in Chinese

If I can provide any more info, please let me know

electric1490 commented 5 years ago

Good news/bad news. Bad news is that I don't think I can help you fix the issue. Good news is that I'm in the middle of troubleshooting an issue on another panel but stumbled upon another thread where other folks are having a similar issue as you:

https://github.com/2dom/PxMatrix/issues/53

Hope that helps a little bit. I've got some of those exact panels on the slow-boat over to the US now. LMK if that helped at all?

manuelgorman commented 5 years ago

Thanks @electric1490, looks like a very similar issue but I'm afraid that thread looks like its on Arduino - I'm using a Raspberry Pi and an Adafruit Pi Bonnet. Not sure how much they have in common apart from the symptoms!

infurio commented 5 years ago

Hi @manuelgorman, i think the symptoms look similar to what i was experiencing. Foolishly, i skim read the instructions and missed the section about disabling 1-wire first. Many hours later, disabled it and it just worked. Check out the gallery and see if you had the same issue.

gallery

shades66 commented 5 years ago

Hi, saw your comment on issue #746 , i just added some comments to that with how I got these panels working with the adafruit matrix hat.,