Search found 4 matches

by jgbrown
Mon Dec 02, 2019 5:53 pm
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 32
Views: 11467

Re: Anyone working on a MAX7219 8x8 LED matrix display library?

Here's a link to the repository so you can use the exact file to alleviate chances of typo's, etc....and in case I made any last minute changes.

https://github.com/jgbrown32/ESP8266_MAX7219

-- Jeff
by jgbrown
Wed Nov 13, 2019 5:49 am
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 32
Views: 11467

Re: Anyone working on a MAX7219 8x8 LED matrix display library?

Hi -- Figured out a solution to the rotation problem: Used a different format constant (MONO_HMSB). Altered the spi.write in the show() function to write buffer in a different order. Not the most elegant, but it works. I'll spend a little time to update the driver definition to support an additional...
by jgbrown
Mon Nov 11, 2019 3:39 am
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 32
Views: 11467

Re: Anyone working on a MAX7219 8x8 LED matrix display library?

...for clarification, the text is not actually displaying backwards, it needs to be rotated 180 degrees so it displays correctly on each matrix.

Sorry for any confusion.

Thanks -- Jeff
by jgbrown
Mon Nov 11, 2019 1:59 am
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 32
Views: 11467

Re: Anyone working on a MAX7219 8x8 LED matrix display library?

Hi -- I see several have encountered text being displayed backwards using @mcauser's library. I haven't seen anything specific to a resolution. Is there any resolution available? Everything seems to be working okay with my 4x configuration with this one exception. Also, I've seen mention of using di...