LedController is an Arduino library for MAX7219 and MAX7221 Led display drivers. The code should work with most boards and architectures but I only test it for the ESP32 Dev Module. Feel free to create an issue if something is missing or not working correctly.
The CI automatically tests the following boards(PlatformIO boards names):
- esp32dev
- d1_mini
- uno
- ATmega1280
- leonardo
The following boards do not work at the moment:
- due
All help regarding compatibility with more boards is welcome.
Documentation for the library is on the Github Project Pages
The lastest version of the Library is always available from the LedController Release Page
The library can be also installed using the standard Arduino library install procedure.
The library includes a keywords.txt for the Arduino ide and a configuration for visual studio code (with the platform.io extention).
If you want to use hardware SPI you have to use the following port. Please keep in mind that the MOSI(Master out Slave in) and the SCK(Serial Clock) signal can be shared by multiple SPI devices, while the SS(Slave Select) signal must be unique to every device(You can use every free pin for this).
| Arduino Board | MOSI | MISO | SCK | SS (Slave) | SS (Master) |
|---|---|---|---|---|---|
| Uno or Duemilanove | 11 or ICSP-4 | 12 or ICSP-1 | 13 or ICSP-3 | 10 | - |
| Mega1280 or Mega2560 | 51 or ICSP-4 | 50 or ICSP-1 | 52 or ICSP-3 | 53 | - |
| Leonardo | ICSP-4 | ICSP-1 | ICSP-3 | - | - |
| Due | ICSP-4 | ICSP-1 | ICSP-3 | - | 4, 10, 52 |
| Deek-Robot Arduino | 11 | 12 | 13 | - | 10 |
| ESP32-WROOM | 23 | 19 | 18 | - | 5 |