zephyr

History

Francois Ramu 98e24fa6ce samples: drivers: led pwm running on 2 pwm leds on disco l475 Add the overlay file to run the samples/drivers/led_pwm on the disco_l475_iot1 board. Two green leds are used on pa5 and pb14 corresponding on 2 pwm channels of timers2 and timers15. The leds node has to be disabled to let the pin for the pwm nodes. Signed-off-by: Francois Ramu <francois.ramu@st.com>		2023-02-20 09:47:18 +01:00
..
boards	samples: drivers: led pwm running on 2 pwm leds on disco l475	2023-02-20 09:47:18 +01:00
src	includes: prefer <zephyr/kernel.h> over <zephyr/zephyr.h>	2022-09-05 16:31:47 +02:00
CMakeLists.txt	cmake: increase minimal required version to 3.20.0	2021-08-20 09:47:34 +02:00
prj.conf	samples: drivers: led_pwm: enable immediate logging mode	2023-01-02 13:03:46 +01:00
README.rst	samples/drivers: led_pwm: Fixes for device testing	2021-01-18 19:11:43 +01:00
sample.yaml	samples: drivers: led_pwm: Update driver to remove DEVICE_DT_GET	2022-07-23 11:39:11 -05:00

README.rst

.. _led_pwm:

LED PWM sample application
##########################

Overview
********

This sample allows to test the led-pwm driver. The first "pwm-leds" compatible
device instance found in DT is used. For each LEDs attached to this device
(child nodes) the same test pattern (described below) is executed. The LED API
functions are used to control the LEDs.

Test pattern
============

For each PWM LEDs (one after the other):

- Turning on
- Turning off
- Increasing brightness gradually
- Blinking on: 0.1 sec, off: 0.1 sec
- Blinking on: 1 sec, off: 1 sec
- Turning off

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

This sample can be built and executed on all the boards with PWM LEDs connected.
The LEDs must be correctly described in the DTS: the compatible property of the
device node must match "pwm-leds". And for each LED, a child node must be
defined and the PWM configuration must be provided through a "pwms" phandle's
node.