zephyr

History

Keith Packard 0b90fd5adf samples, tests, boards: Switch main return type from void to int As both C and C++ standards require applications running under an OS to return 'int', adapt that for Zephyr to align with those standard. This also eliminates errors when building with clang when not using -ffreestanding, and reduces the need for compiler flags to silence warnings for both clang and gcc. Most of these changes were automated using coccinelle with the following script: @@ @@ - void + int main(...) { ... - return; + return 0; ... } Approximately 40 files had to be edited by hand as coccinelle was unable to fix them. Signed-off-by: Keith Packard <keithp@keithp.com>		2023-04-14 07:49:41 +09:00
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boards	…
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _lp503x:

LP5030/6: 10 or 12 RGB channels
###############################

Overview
********

This sample controls up to 12 LEDs connected to a LP503x driver.

First, for each LED information is retrieved using the led_get_info syscall
and printed in the log messages. Next, from an infinite loop, a test pattern
(described below) is applied to all the LEDs simultaneously (using the
led_write_channels syscall) and then to each LED one by one (using the
led_set_{brightness,color} syscalls).

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

For all the LEDs first (using channel API) and then for each LED one by one:

For each color in red green blue white yellow purple cyan orange:

- set the color
- turn on
- turn off
- set the brightness gradually to the maximum level
- turn off

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

This sample can be built and executed on boards with an I2C LP5030/6 LED driver
connected. A node matching the "ti,lp503x" binding should be defined in the
board DTS files.

As an example this sample provides a DTS overlay for the :ref:`lpcxpresso11u68`
board (:file:`boards/lpcxpresso11u68.overlay`). It assumes that a I2C LP5030
LED driver (with 10 LEDs wired) is connected to the I2C0 bus at address 0x30.

References
**********

- LP503x: https://www.ti.com/lit/ds/symlink/lp5036.pdf