Using Gemma with 16x8 Matrix Backpack

Wearable electronics: boards, conductive materials, and projects from Adafruit!

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
makeinspires
 
Posts: 32
Joined: Tue Nov 19, 2013 11:58 pm

Using Gemma with 16x8 Matrix Backpack

Post by makeinspires »

Cheers!
I've been searching the webs for an example of using the 16 by 8 Matrix Backpack with a gemma. Basically the space invader project, but with a 16x8... I can't find it... I can only find code compatible with a larger trinket, through the LED Backpack examples. When running that example w the gemma it says not enough space...
Maybe someone knows how to edit the Space Invader project to work with a 16x8? I want to use it for scrolling text.
Thanks for any help!

User avatar
adafruit_support_carter
 
Posts: 29158
Joined: Tue Nov 29, 2016 2:45 pm

Re: Using Gemma with 16x8 Matrix Backpack

Post by adafruit_support_carter »

When running that example w the gemma it says not enough space...
What example are you running here?
Maybe someone knows how to edit the Space Invader project to work with a 16x8? I want to use it for scrolling text.
The Space Invaders project is pretty optimized for the 8x8 display, making it tricky to port to 16x8. Or are you just wanting to scroll text?

User avatar
makeinspires
 
Posts: 32
Joined: Tue Nov 19, 2013 11:58 pm

Re: Using Gemma with 16x8 Matrix Backpack

Post by makeinspires »

I'm running the example from the LED Backpack Library/Examples - I think it's mean for a feather...
Yes, just want to do scrolling text on it, basically a name tag!

User avatar
adafruit_support_carter
 
Posts: 29158
Joined: Tue Nov 29, 2016 2:45 pm

Re: Using Gemma with 16x8 Matrix Backpack

Post by adafruit_support_carter »

The Gemma V2 (and the original Trinket) use a very small processor that doesn't have enough space to use the LED Backpack library. That's why the Space Invaders code does not use it and instead does stuff more directly, but as a result, potentially more difficult to understand.

You could try to use the Space Invaders code as an example of how to go about doing it, but a simpler option might be to upgrade to the newer M0 based Gemma:
https://www.adafruit.com/product/3501
which has enough space to use the LED Backpack library.

Locked
Please be positive and constructive with your questions and comments.

Return to “Wearables”