Matrix M5.dis

[johnwargo]

I just purchased some M5 Atom Matrix devices and I want to start programming the LEDs. Where do I find documentation for the M5.dis API? The sample code does very little and I can't find any reference to M5.dis in the docs I've been able to find.

[lukasmaximus]

Hey are you programming in arduino or uiflow? you can check out these videos to get started

arduino
https://www.youtube.com/watch?v=2f4biAfvC_M

uiflow
https://www.youtube.com/watch?v=4dr5Y5ssQTk&t=201s

[johnwargo]

Thanks, but that doesn't answer my question. I'm looking at the sample apps and I see references to M5 methods, and M5.dis but I cannot find reference documentation for them anywhere.

Where are the reference docs for the M5 SDK? What are the methods, properties, etc. for the M5.dis object?

[felmue]

Hello John

Have you seen this? https://github.com/m5stack/M5Atom#display-api-document

Felix

[johnwargo]

@felmue Thanks, yes, I have - but that's not documentation for M5.dis object, that's documentation for some methods in a utility library that isn't even loaded by the M5 library.

led-matrix:14:10: error: 'class LED_Display' has no member named 'fillpix'

   M5.dis.fillpix(CRGB::Black);

          ^

exit status 1
'class LED_Display' has no member named 'fillpix'

I'm trying to figure out how to work with the matrix display on the Atom Matrix and I can't find any examples, end to end, that work. I found a reference to M5.dis but I'm just not seeing anything that references it or real examples of how to use it.

I tried using FastLED which is what the utility/LED_DisPlay.h code uses under the covers, even submitted some PRs today to tighten up that code, but as soon as I make any call to FastLED to update the display or show pixels, the sketch crashes.

[world101]

Not sure why, but the sketch was crashing for me as well, until I commented out the include M5Atom.h and m5.begin lines.

[felmue]

Hi John

The M5.dis object is defined in M5Atom.h as a member of M5Atom class:

class M5Atom
{
...
    LED_DisPlay dis;
...
}
extern M5Atom M5;

For the M5Atom examples to compile I had to add M5Atom and FastLED libraries to the project. (In PlatformIO I can simply drop the two libaries into the lib directory of the project. Not sure how that works with Arduino IDE, sorry.)

Felix

[johnwargo]

@felmue aaah, OK, I missed that when I looked at the source. Thanks.

I'm loading M5Atom.h and FastLED.h and its just not working for me.

[stevesch]

@johnwargo If anyone comes across this and is looking for functioning Arduino/PlatformIO code for the M5 Atom Matrix display, there's some on github here:
https://github.com/stevesch/atom-waves

[robalstona]

You can try neopixel library (probally from adafruit)