max7219 module (4x 8x8 Leds)

Other Hardware LEDs and Multiplexing
1

Hello,

I bough a single module including 4 maw7219 and 4 8x8 led displays. I would like to use it to display a scrolling text, but I cannot write ans scroll in the proper direction. This is the code I use:

Maybe it will be fixed with a different wiring (or just turn the 8x8 modules), but the max7219 are connected into a single breakable printed board, I cannot change the wiring without breaking the board and use my soldering iron :confused:

I tried to change the code with the functions shiftUp or shiftDown (there are in the MaxMatrix.cpp library), without good results. The code isn't well documented, I don't know what I should modify.

See attached: a picture of what happens, trying to write the word "cadeau"

I use a module like this one:
https://www.aliexpress.com/item/Free-Shipping-MAX7219-Dot-Matrix-Module-For-Arduino-Microcontroller-4-In-One-Display-with-5P-Line/32683197112.html

PS: I already searched the forum, but the answers I found was not for such a module

IMG_0239.jpg
IMG_0239.jpg1536×2048 676 KB

2

https://majicdesigns.github.io/MD_Parola/

3

Awesome! I picked randomly the options in the MD_MAX72xx library, and the "USE_FC16_HW" is what is needed for my module :slight_smile:

Thank you!

4

kimented:
Awesome! I picked randomly the options in the MD_MAX72xx library, and the "USE_FC16_HW" is what is needed for my module :slight_smile:

Thank you!

Glad it worked. :slight_smile:

The author of that library reads this forum.
If you have more questions, put Parola library in your subject line in a new post, and hopefully he will see it.

5

I've seen this :slight_smile:

There is a Parola thread in the Exhibition/Gallery forum, usually on the first couple of pages. Post there and I will definitely see it as I get notified.