zephyr

History

Oliver Barta 5ad6a7989f boards: rpi_pico: avoid conflicting use of LED led0 and pwm_led0 are both referring to the same LED. The usage is mutualy exclusive, as only one pin muxing can be applied. Disabling child nodes is currently neither supported by gpio-leds device nor by pwm-leds device. We need to disable either of the devices completely for correct operation. Please note that even if disabling of child nodes would be supported, the devices would be empty anyway, as both have only one singe LED defined at the moment. Therefore we can completely disable one of the devices in any case. Fixes: `b876ad9d6f` ("boards: arm: rpi_pico: add pwm bindings to devictree") Signed-off-by: Oliver Barta <o.barta89@gmail.com>		2023-01-02 13:03:46 +01:00
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boards	boards: rpi_pico: avoid conflicting use of LED	2023-01-02 13:03:46 +01:00
src	…
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

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.