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2 lines on 2 lines off...
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Please be positive and constructive with your questions and comments.

2 lines on 2 lines off...

by bluedwarf on Tue Mar 16, 2021 10:45 pm

I purchased a Raspberry Pi Zero, a RGB Matrix Bonnet, and a 64x32 LED display all from Adafruit.

When I run the demo, I am seeing 2 lines on and 2 lines off throughout the entire display. Upon running a text display, I found that the display is replicating itself as if it were 2x(32x32) displays. I have tried wiggling the wires, and checking the connections. All look fine from my perspective, but I'm not an expert.

Any ideas?
20210316_203654.jpg
See the duplicatation of the raspberry, and the 2 lines on & 2 lines off.
20210316_203654.jpg (929.18 KiB) Viewed 300 times

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Re: 2 lines on 2 lines off...

by dastels on Wed Mar 17, 2021 11:52 am

Does the software know it's a 32x64 matrix?

Dave

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Re: 2 lines on 2 lines off...

by bluedwarf on Sun Mar 21, 2021 3:25 pm

Dave,

Thanks for your reply.

I have run the following commands to indicate that I am working with a 64x32 pixel matrix.

./demo -D0 --led-rows=64 --led-cols=32 (Right Side of Image)
./demo -D0 --led-rows=32 --led-cols=64 (Left Side of Image)
Greenshot 2021-03-21 13.19.20.jpg
Greenshot 2021-03-21 13.19.20.jpg (288.72 KiB) Viewed 271 times


I followed the following guide to make it work. https://learn.adafruit.com/adafruit-rgb ... pberry-pi/

I don't think I am missing anything, but apparently something is amiss. I appreciate all the help you or anyone else can provide.

Thanks,
Peter

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Re: 2 lines on 2 lines off...

by adafruit_support_carter on Mon Apr 05, 2021 2:06 pm

Thanks for the photo. Can you post one more with the matrix flipped over so we can check the connections on the back of the matrix.

What OS image are you using? When you ran the script, did you select the "quality" or "convenience" option?

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Re: 2 lines on 2 lines off...

by bluedwarf on Tue Apr 06, 2021 10:36 pm

@adafruit_support_carter,

I am running the following version of Linux
Linux raspberrypi 5.10.11+ #1399 Thu Jan 28 12:02:28 GMT 2021 armv6l GNU/Linux

20210406_202422_1.jpg
20210406_202422_1.jpg (352.35 KiB) Viewed 229 times

There are two ports on the back of the board. One port did not work at all, and the second one worked as shown in previous images.

In regard to the install, I selected convenience. I did not want to have to do soldering as the question implied.

"What is thy bidding?
1. Quality (disables sound, requires soldering)
2. Convenience (sound on, no soldering)"

Please let me know if you have any other questions.

Thanks,
Peter

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Re: 2 lines on 2 lines off...

by adafruit_support_carter on Wed Apr 07, 2021 2:03 pm

Thanks for the photo. That looks generally OK. The info on which connector to use is here:
https://learn.adafruit.com/32x16-32x32- ... new-wiring
One's an in and one's an out, so, yep, only one will work. You are on the correct one in the photo.

How do those two power wires end up being connected to the matrix power cable? Just shoving them in the end of the connector?

That linux version seems fine. That's one of the recent Rasperry Pi OS images, right? Were you starting with a fresh OS image? Asking in case there may be some other software item that is interfering, which can happen sometimes.

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Re: 2 lines on 2 lines off...

by bluedwarf on Sat Apr 10, 2021 10:00 pm

@adafruit_support_carter,

The power comes into the hat via a power supply I bought from Adafruit. From the hat, it connects via alligator clips to the wiring harness for the LED board. Then the wiring harness connects into the LED board.

In regard to the linux version, yes it is Rasberry Pi OS. Nothing has been installed on it. I build this new setup to do something with the LED board.

20210410_195022-2.jpg
20210410_195022-2.jpg (903.22 KiB) Viewed 204 times


Any other questions?

Thanks,
Peter

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Re: 2 lines on 2 lines off...

by adafruit_support_carter on Mon Apr 12, 2021 10:51 am

Thanks. Not super solid, but shouldn't really be something that could cause what you are seeing.

Try running the example again and add this additional command line parameter:
Code: Select all | TOGGLE FULL SIZE
--led-gpio-mapping=adafruit-hat

for example:
Code: Select all | TOGGLE FULL SIZE
./demo -D0 --led-rows=32 --led-cols=64 --led-gpio-mapping=adafruit-hat

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Re: 2 lines on 2 lines off...

by bluedwarf on Tue Apr 13, 2021 4:48 pm

Unfortunately, there is no change. Still missing lines.
20210413_144226-2.jpg
20210413_144226-2.jpg (971.45 KiB) Viewed 185 times


At this point, is a RMA in order, or are there other things to try?

Thanks,
--Peter

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Re: 2 lines on 2 lines off...

by adafruit2 on Tue Apr 13, 2021 9:42 pm

hard to tell where the failure is yet
on the bonnet, while running the code above, try connecting a wire jumper between one of the following: A B C D labelled pins AND ground (four different tries). just touch them together, does any of the touches change the output?

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Re: 2 lines on 2 lines off...

by bluedwarf on Mon Apr 26, 2021 11:46 pm

Thank you for your patience while I completed the requested ask.

I grounded out A,B,C,D.

When A was grounded out, on 1 line was visible instead of the two. The one line was the top line of the two which were normally on.
When B was grounded out, there was no difference.
When C was grounded out, it skipped 6 lines between the lit up lights. (Note: I must have caught the image in refresh because there is normally 2 more lines on in the big gap on the image).
When D was grounded out, it was as shown.

Grounding_ABCD.jpg
Grounding_ABCD.jpg (928.98 KiB) Viewed 143 times


Please let me know what the next step is.

Thanks!

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Re: 2 lines on 2 lines off...

by adafruit2 on Sat May 08, 2021 8:54 pm

hmm its hard to tell whether its the matrix or the hat, you dont by chance have access to another matrix or hat? just would save us a step :D

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Re: 2 lines on 2 lines off...

by bluedwarf on Tue May 11, 2021 3:25 pm

I do not have an extra hat or matrix.

You could either issue an RMA and I can send them in (preferred), or we can try something else.

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Re: 2 lines on 2 lines off...

by adafruit2 on Tue May 11, 2021 4:21 pm

ok email support@adafruit for a new hat and matrix.

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Please be positive and constructive with your questions and comments.