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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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Hub75 1:4 P10 Outdoor panel (16x32) using Adafruit Bonnet #803

Open gjs56 opened 5 years ago

gjs56 commented 5 years ago

Hi, I'm trying to get the above LED matrix working with my RasPi 3 Model A Plus. Despite running examples with different options on multiplexing, row-addr, slowdown and others I have had no success at all - not even a flicker from a single LED. I feel as though I'm missing something fundamental since all other issues that I've looked at using similar configurations have at least had some initial output from the panel. There is power to the bonnet (green light) which I believe is connected correctly to the panel. There is a ribbon cable (provided by the supplier of the panel) between the bonnet and the panel. The pi is powered via the bonnet and isn't connected to anything else (monitor, keyboard etc) and I'm using Putty to submit commands to the pi from my laptop. When running a sample program I get a message indicating that gpio mapping is via adafruit-hat and the program exits after reaching timeout. Unfortunately I am an absolute beginner when it comes to the pi and have practically no knowledge of electronics.
If anyone can point me in the right direction or just give me some checks to make I'd be most grateful.

davemaster commented 5 years ago

pictures???

gjs56 commented 5 years ago

Thanks for rapid response. Pictures as requested. Forgot to mention that I have also disabled the audio parameter in the pi config as recommended.

image image image

ChristopherBadenhorst commented 5 years ago

Have you soldered the pins to the bonnet?

gjs56 commented 5 years ago

From Adafruit's description of the bonnet, no soldering is required.

ChristopherBadenhorst commented 5 years ago

Weird, using the same panels with the passive-3 (and wired pinout like in the 'readme') and that works. Have you tried wiring up directly?

gjs56 commented 5 years ago

I have previously tried using individual wires but couldn't get anything working. I was on the verge of giving up when I saw Adafruit's bonnet and thought I'd give it a go. It feels like there's a secret switch somewhere or some additional configuration that I need to change. Is there a way to ask the Pi what hardware it recognises (akin to plugging a camera into a Windows PC)?

ChristopherBadenhorst commented 5 years ago

Got the same panels and that works fine. Just bought a Ada Hat and will try that too. Will try and keep track of the steps I do. Ever thought of the panel being broken?

gjs56 commented 5 years ago

I have considered there being a problem with the panel but I do have two and neither is delivering anything. Many thanks for trying to help with this.

davemaster commented 5 years ago

try using the following: --led-gpio-mapping=regular (and connect directly with cables) the you need to try with --led-rows=16 --led-cols=32 --led-chain=1 or 2 or 3 (depends on the number of panels in chain -12 max according readme-) --led-parallel=1 --led-multiplexing=9 (try another if it doesn't works) also, --led-no-hardware-pulse

davemaster commented 5 years ago

Example

(while :; do date +%T ; sleep 0.5 ; done) | sudo ./text-example -f ../fonts/8x13B.bdf -y2 -C255,0,0 --led-cols=32 --led-rows=16 --led-chain=2 --led-multiplexing=8 --led-pwm-lsb-nanoseconds 250 --led-brightness=20