boards/shields/max7219/doc/index.rst
.. _max7219_shield:
MAX7219 LED display driver shield #################################
Overview
This is a generic shield for LED matrix based on MAX7219. These displays have an SPI interface and usually only five pins: VCC, GND, DIN, CS, and CLK.
+---------------------+---------------------+---------------------+ | Display | Controller | Shield Designation | | | | | +=====================+=====================+=====================+ | No Name | MAX7219 | max7219_8x8 | | 8x8 pixel | | | +---------------------+---------------------+---------------------+
Requirements
This shield can only be used with a board which provides a configuration
for Arduino connectors and defines a node alias for the SPI interface
(see :ref:shields for more details).
Programming
Set --shield max7219_8x8 when you invoke west build. For example:
.. zephyr-app-commands:: :zephyr-app: samples/drivers/display/ :board: nrf52840dk/nrf52840 :shield: max7219_8x8 :goals: build