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Anas Nashif b835b02136 tests: cleanup metadata and filtering - Add integration_platforms to avoid excessive filtering - Make sure integration platforms are actually part of the filter - Fix some tags and test meta data Signed-off-by: Anas Nashif <anas.nashif@intel.com>		2023-06-13 09:38:27 -04:00
..
boards	samples: basic: fade_led: add support for rpi_pico board	2023-01-02 13:03:46 +01:00
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt	cmake: increase minimal required version to 3.20.0	2021-08-20 09:47:34 +02:00
README.rst	samples: basic: fade_led: use pwm_dt_spec	2022-04-28 11:29:38 +02:00
prj.conf	…
sample.yaml	tests: cleanup metadata and filtering	2023-06-13 09:38:27 -04:00

README.rst

.. _fade-led-sample:

Fade LED
########

Overview
********

This application "fades" a LED using the :ref:`PWM API <pwm_api>`.

The LED starts off increases its brightness until it is fully or nearly fully
on. The brightness then decreases until the LED is off, completing on fade
cycle. Each cycle takes 2.5 seconds, and the cycles repeat forever. The PWM
period is taken from Devicetree. It should be fast enough to be above the
flicker fusion threshold.

Requirements and Wiring
***********************

This sample has the same requirements and wiring considerations as the
:ref:`pwm-blinky-sample`.

Building and Running
********************

To build and flash this sample for the :ref:`nrf52840dk_nrf52840`:

.. zephyr-app-commands::
   :zephyr-app: samples/basic/fade_led
   :board: nrf52840dk_nrf52840
   :goals: build flash
   :compact:

Change ``nrf52840dk_nrf52840`` appropriately for other supported boards.

After flashing, the sample starts fading the LED as described above. It also
prints information to the board's console.