64 x 64 LED matrix

[TristanGrahn]

Hey all, sorry I know this is not the right place to post this, but I have been struggling for almost two days straight.

long story short I bought a p3(2121) 64x64 1/32S waveshare
(https://www.waveshare.com/rgb-matrix-p3-64x64.htm)

it came with a hub75 to jumper pin cable where I plugged im the individual pins into a Rapsberry Pi 3B according the the pinout provided. (I’ve re-wired and checked the wireing multiple times)

the raspberry pi is running rasbian lite x64 where I cloned this library and blacklisted the audio module.

my problem is no matter what combination of flag variables I choose for the “demo -D0” program (panel type, multiplexing, row-added-type) the panel just stays blank not even a flicker.

(The panel does work when I connect an esp32 to it)

Is there a specific thing I need to do or configure in the boot file or a specific flag varible I’m not using?
I just feel like I’ve tried everything.

[davemaster]

Greetings,

And, what is your command? Your power supply? How much Amps gives? ONE MORE, Maybe you're swap the wiring HUB75 pinout, maybe...

[TristanGrahn]

Sorry for the vague description. I do apologise
The display is being powered with a 5V 6A power supply and the raspberry pi is being powered by a 5V 3A power supply (the grounds of both supplies are connected together.

I did double check that I didn’t swap the hub75 wireing and all seems correct.

the command I was using was:

Sudo ./ -D0 —led-rows=64 —led-cols=64 —led-slowdown-gpio=4 —led-chain=1 --led-gpio-mapping=regular

I’ve also tried the two different display types
Fm6126A and FM6217 but the display still stays blank.
I also disabled 1-wire and I2S

Could the length of the cable from the pi to the display be a problem?

[LyubMaks]

Hello. what chips are used in the panel? I worked with a similar one, only at the end of the marking -M3. it started without any problems. try to enter the command correctly: go to the rpi-rgb-led-matrix directory. type make. go to the directory rpi-rgb-led-matrix/examples-api-use. enter the command
sudo ./demo -D0 --led-rows=64 --led-cols=64 --led-slowdown-gpio=4 --led-chain=1 --led-gpio-mapping=regular

[TristanGrahn]

Hey thank you for your help I did that to no avail my board is using an SM16208SJ my end marking is M5.1 not sure what that means as well🙈 I’ve been trying things all day I fear it may have to do with the logic levels and I may need to get adafruit bonnent