Search found 8 matches

by jgbrown
Thu Oct 08, 2020 12:55 am
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 42
Views: 16990

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

Hi -- Glad you figure the connection issue out. There is a possibility that at some point the connection was wrong and it fried something on the LEDs. I've overpowered some and they don't like it! :-) Vertical Scrolling: I'm sure it's possible but I've never really dug into it. I unfortunately don't...
by jgbrown
Thu Oct 01, 2020 7:55 pm
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 42
Views: 16990

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

Given the fact that unplugging the display allows the code to continue, I would assume it's a connection issue. The code is trying to establish the SPI interface. Being unable to use reset further supports this condition as the device isn't allowing any further input while is attempting the connecti...
by jgbrown
Wed Jul 22, 2020 10:13 pm
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 42
Views: 16990

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

Thanks Tim...you are right. I went directly to main.py and saw your syntax error and replied. I have updated the README with your feedback so hopefully it doesn't trip anyone else up.

-- Jeff
by jgbrown
Tue Jul 21, 2020 7:47 pm
Forum: Drivers for External Components
Topic: Anyone working on a MAX7219 8x8 LED matrix display library?
Replies: 42
Views: 16990

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

Hi Tim --

It's been a while since I've done anything with this, but there may be a typo in the code. For line 5, try:

display = max7219.Max7219(width, height, spi, cs, rotate)

Let me know if that works.

-- Jeff
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: 42
Views: 16990

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: 42
Views: 16990

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: 42
Views: 16990

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: 42
Views: 16990

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...