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samples: drivers: add test sample for TI LP503x LED drivers
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 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 Signed-off-by: Simon Guinot <simon.guinot@seagate.com>
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‎samples/drivers/led_lp503x/CMakeLists.txt‎

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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.13.1)
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find_package(Zephyr HINTS $ENV{ZEPHYR_BASE})
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project(led_lp503x)
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FILE(GLOB app_sources src/*.c)
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target_sources(app PRIVATE ${app_sources})

‎samples/drivers/led_lp503x/README.rst‎

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.. _lp503x:
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LP5030/6: 10 or 12 RGB channels
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###############################
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Overview
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********
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This sample controls up to 12 LEDs connected to a LP503x driver.
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First, for each LED information is retrieved using the led_get_info syscall
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and printed in the log messages. Next, from an infinite loop, a test pattern
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(described below) is applied to all the LEDs simultaneously (using the
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led_write_channels syscall) and then to each LED one by one (using the
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led_set_{brightness,color} syscalls).
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Test pattern
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============
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For all the LEDs first (using channel API) and then for each LED one by one:
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For each color in red green blue white yellow purple cyan orange:
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- set the color
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- turn on
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- turn off
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- set the brightness gradually to the maximum level
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- turn off
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Building and Running
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********************
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This sample can be built and executed on boards with an I2C LP5030/6 LED driver
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connected. A node matching the "ti,lp503x" binding should be defined in the
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board DTS files.
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As an example this sample provides a DTS overlay for the :ref:`lpcxpresso11u68`
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board (:file:`boards/lpcxpresso11u68.overlay`). It assumes that a I2C LP5030
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LED driver (with 10 LEDs wired) is connected to the I2C0 bus at address 0x30.
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References
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**********
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- LP503x: https://www.ti.com/lit/ds/symlink/lp5036.pdf

‎samples/drivers/led_lp503x/boards/lpcxpresso11u68.overlay‎

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/*
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* Copyright (c) 2020 Seagate Technology LLC
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <dt-bindings/led/led.h>
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&i2c0 {
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/* TI LP5030 LED controller connected to I2C0. */
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lp5030@30 {
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compatible = "ti,lp5030", "ti,lp503x";
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reg = <0x30>;
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label = "LP5030";
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led_0 {
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label = "LED LP5030 0";
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index = <0>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_1 {
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label = "LED LP5030 1";
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index = <1>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_2 {
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label = "LED LP5030 2";
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index = <2>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_3 {
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label = "LED LP5030 3";
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index = <3>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_4 {
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label = "LED LP5030 4";
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index = <4>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_5 {
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label = "LED LP5030 5";
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index = <5>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_6 {
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label = "LED LP5030 6";
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index = <6>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_7 {
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label = "LED LP5030 7";
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index = <7>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_8 {
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label = "LED LP5030 8";
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index = <8>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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led_9 {
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label = "LED LP5030 9";
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index = <9>;
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color-mapping =
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<LED_COLOR_ID_RED>,
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<LED_COLOR_ID_GREEN>,
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<LED_COLOR_ID_BLUE>;
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};
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};
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};

‎samples/drivers/led_lp503x/prj.conf‎

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CONFIG_LOG=y
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CONFIG_I2C=y
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CONFIG_LED=y
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CONFIG_LP503X=y

‎samples/drivers/led_lp503x/sample.yaml‎

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sample:
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description: Demonstration of the LP503x LED driver
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name: LP503x sample
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tests:
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sample.drivers.led.lp503x:
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filter: dt_compat_enabled("ti,lp503x")
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tags: LED
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depends_on: i2c

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