.. zephyr:code-sample:: is31fl3733
:name: IS31FL3733 LED Matrix
:relevant-api: led_interface
Control a matrix of up to 192 LEDs connected to an IS31FL3733 driver chip.
Overview
********
This sample controls a matrix of up to 192 LEDs. The sample performs the
following test steps in an infinite loop:
- Set all LEDs to full brightness with :c:func:`led_write_channels` API
- Disable upper quadrant of LED array with :c:func:`led_write_channels` API
- Dim each LED in sequence using :c:func:`led_set_brightness` API
- Toggle each LED in sequency using :c:func:`led_on` and :c:func:`led_of` APIs
- Toggle between low or high current limit using :c:func:`is31fl3733_current_limit`
API, and repeat the above tests
Sample Configuration
====================
The number of LEDs can be limited using the following sample specific Kconfigs:
- :kconfig:option:`CONFIG_LED_ROW_COUNT`
- :kconfig:option:`CONFIG_LED_COLUMN_COUNT`
Building and Running
********************
This sample can be run on any board with an IS31FL3733 LED driver connected via
I2C, and a node with the `issi,is31fl3733` compatible present in its devicetree.
This sample provides a DTS overlay for the :ref:`frdm_k22f` board
(:file:`boards/frdm_k22f.overlay`). It assumes that the IS31FL3733 LED
controller is connected to I2C0, at address 0x50. The SDB GPIO should be
connected to PTC2 (A3 on the arduino header)
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