matrix8x8 off my one column
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matrix8x8 off my one column

by mike46060 on Fri May 31, 2013 2:36 pm

i bought the led matrix with i2c backpack, soldered it together, and loaded the code. when the example matrix8x8 program runs the images seem to be off my one column. when I run the other examples it appears to be okay.

is there a glitch in the code or have i done something?
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Re: matrix8x8 off my one column

by mike46060 on Fri May 31, 2013 2:38 pm

I am also having an issue with the piccolo program. when it runs the left most column stays lit all the way to the top (8 pixels) and the second column from the left stays half lit (4 pixels). weird...

I have not changed any code. only uploaded examples.
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Re: matrix8x8 off my one column

by franklin97355 on Fri May 31, 2013 6:09 pm

i bought the led matrix with i2c backpack, soldered it together
A couple of clear pictures might help.
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Re: matrix8x8 off my one column

by adafruit_support_mike on Fri May 31, 2013 6:38 pm

That does sound odd.

Just to check the basics, post a couple photos of your hardware so we can see how you have things set up. A photo of the board itself that lets us see the solder joints, and another that lets us see all the connections between the display and your Arduino will get us rolling.

You can attach images directly to a post, or just use URLs if you can store images somewhere else. If you want to use attachments, the system prefers (well, demands) 800x600 or less.
When you void a product warranty, you give up your right to sue the manufacturer if something goes wrong and accept full responsibility for whatever happens next. And then you truly own the product.
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Re: matrix8x8 off my one column

by pburgess on Sat Jun 01, 2013 12:12 am

Is this a single-color 8x8 matrix, or the bi-color variety? Make sure you're not running code intended for one on the other type. It'll run, but you'll see exactly this sort of phenomenon.
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Re: matrix8x8 off my one column

by mike46060 on Sat Jun 01, 2013 11:15 pm

pburgess wins the prize.

i replaced
Adafruit_8x8matrix matrix = Adafruit_8x8matrix();

with
Adafruit_BicolorMatrix matrix = Adafruit_BicolorMatrix();

and now all is well. thanks pburgess! what a head scratcher...

I took some video of what is going on. At this very moment the video has about 15 more mins till the upload is complete.
http://youtu.be/9_zAWCDDKtg
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