zephyr

History

Tim Lovett 216a1d95ed boards: seeed: Add xiao_rp2040 board Adds xiao_rp2040 board built off rpi_pico Currently only uf2 flash supported Signed-off-by: Tim Lovett <timo614@gmail.com>		2024-06-12 17:10:04 -05:00
..
boards	boards: seeed: Add xiao_rp2040 board	2024-06-12 17:10:04 -05:00
src	samples: basic: fade_led: add testing base on console output	2024-06-05 04:24:22 -07:00
CMakeLists.txt	cmake: increase minimal required version to 3.20.0	2021-08-20 09:47:34 +02:00
prj.conf	driver: pwm: use new logger	2018-10-08 17:49:12 -04:00
README.rst	hwmv2: Introduce Hardware model version 2 and convert devices	2024-03-02 16:56:33 -05:00
sample.yaml	samples: basic: fade_led: add testing base on console output	2024-06-05 04:24:22 -07:00

README.rst

.. zephyr:code-sample:: fade-led
   :name: Fade LED
   :relevant-api: pwm_interface

   Fade an LED using the PWM API.

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
:zephyr:code-sample:`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.