| .. _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. |
| |
| Current supported displays |
| ========================== |
| |
| +---------------------+---------------------+---------------------+ |
| | 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 ``-DSHIELD=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 |