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Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 2:52 pm
by mnfisher
Something awry with v10....
So - I re-exported from v10 and it still crashed - send report bad crash...
I re-exported again and still no joy. So I tried adding another component - first that I tried failed (unable to add) - second (picked at random - grove_humidity_sht31) added okay... Then I could add the display component - and compiles okay. Also runs okay in sim. I could also delete the grove component (although still in the file here)
Martin
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 3:08 pm
by kaqkk007
The breakthrough has happened—thank you. It's already running in the simulator and compiling to hex.
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 4:28 pm
by Steve-Matrix
Thanks. I will have a look to see if I can determine why this component is causing a crash.
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 4:43 pm
by mnfisher
kaqkk007 - phew... Lets us know how you get on!
Steve - thanks, I might have done something odd?
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 5:58 pm
by kaqkk007
It's already working in the simulation—how can I view and interact with the LUT? Right now, I can only create numbers and individual light points.
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 6:03 pm
by mnfisher
What would you like to do?
I had a fairly specific need (points and numbers) when I wrote it - but it could be extended fairly easily?
Martin
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 6:22 pm
by kaqkk007
I've "gotten the hang of it." At first, my goal was just a 4- to 6-digit clock, but if I could edit characters and letters, it could look even more impressive.
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 6:29 pm
by mnfisher
The LUT contains 16*16bit maps for 0..9. I got AI to draw the characters with limited success

The LUT could be the extended to include other characters (either text or graphic) if needed (for example set char 10 to be ':' for your clock?) or go the whole way and use ASCII?
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 6:34 pm
by kaqkk007
As far as I'm concerned, there's no reason why we couldn't use ASCII characters—or even write a LUT—if a "mere mortal" could access it. The only thing missing from our repertoire is the display itself.
https://www.youtube.com/channel/UCanvQp ... LOj5nXYJ2Q
Re: MAX7219 32x32 LED Display
Posted: Mon May 25, 2026 7:00 pm
by mnfisher
As another thought - it would be easy to add a DrawChar macro that takes an array of data - so the client program would store it's own data. This could work with 16*16 (as Write) or possibly 8x8?
Martin