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samples: driver: lin: add ncv7430 sample for lin master mode
Introduce new sample for lin driver act as a master node to control the ncv7430 led controller IC as a slave node Signed-off-by: The Nguyen <[email protected]>
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‎samples/drivers/lin/index.rst‎

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.. zephyr:code-sample-category:: lin
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:name: Local Interconnect Network (LIN)
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:show-listing:
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These samples demonstrate how to use the :ref:`lin` driver API.

‎samples/drivers/lin/ncv7430/CMakeLists.txt‎

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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(lin_ncv7430)
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FILE(GLOB app_sources src/*.c)
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target_sources(app PRIVATE ${app_sources})

‎samples/drivers/lin/ncv7430/README.rst‎

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.. zephyr:code-sample:: lin-ncv7430
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:name: NCV7430 LED Controller over LIN
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:relevant-api: lin_controller
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Sample application for using the NCV7430 LED Controller with Zephyr's LIN API.
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Overview
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********
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This sample demonstrates how to use the Local Interconnect Network (LIN) API to control a RGB LED
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using NCV7430 LED Controller. You could find more details about NCV7430 in the
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`NCV7430 Datasheet`_.
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The LIN controller acts as a LIN master node that sends commands to the NCV7430 LED controller
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to change the LED colors. The application cycles through a set of predefined colors, sending the
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appropriate LIN messages to the NCV7430 to update the LED color accordingly.
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Requirements
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************
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* A board with LIN controller support (e.g., ek_ra8m1/r7fa8m1ahecbd).
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* An NCV7430 evaluation board connected to the LIN controller pins (e.g. `skpang NCV7430 Breakout Board`_).
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Building and Running
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********************
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Building and Running for EK-RA8M1
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=================================
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The :zephyr:board:`ek_ra8m1` board does not come with an onboard LIN transceiver. In order to use
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the LIN bus on the EK-RA8M1 board, an external LIN bus transceiver `mikroe LIN Click`_ must be
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connected to this board:
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- P609 EK-RA8M1 (TXD) <-> RXD mikroe LIN Click
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- P610 EK-RA8M1 (RXD) <-> TXD mikroe LIN Click
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- GND EK-RA8M1 <--------> GND mikroe LIN Click
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- 3.3V EK-RA8M1 <-------> 3V3 mikroe LIN Click
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- P601 EK-RA8M1 <--------> EN mikroe LIN Click
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- P602 EK-RA8M1 <--------> WK mikroe LIN Click
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.. note::
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An additional pull-up resistor (10k Ohm) is required between EK-RA8M1 P609 (TXD) and 3.3V to
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ensure proper idle state on the LIN bus.
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The sample can be built and executed for the EK-RA8M1 as follows:
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.. zephyr-app-commands::
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:zephyr-app: samples/drivers/lin/ncv7430
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:board: ek_ra8m1
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:goals: build flash
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:compact:
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Observe the LED color changes on the NCV7430 evaluation board as the application cycles through
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the predefined colors.
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Sample Output
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=============
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.. code-block:: console
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NCV7430 sample started
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Set LED color: Red - read back actual color code: 0xFF0000
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Set LED color: Green - read back actual color code: 0x00FF00
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Set LED color: Blue - read back actual color code: 0x0000FF
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.. _skpang NCV7430 Breakout Board:
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https://www.skpang.co.uk/ncv7430-led-controller-breakout-board-p-5187.html
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.. _NCV7430 Datasheet:
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https://www.onsemi.com/pdf/datasheet/ncv7430-d.pdf
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.. _mikroe LIN Click:
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https://www.mikroe.com/lin-click

‎samples/drivers/lin/ncv7430/boards/ek_ra8m1.overlay‎

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/*
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* Copyright (c) 2025 Renesas Electronics Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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lin_click0: tle72593ge {
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compatible = "infineon,tle72593ge", "lin-transceiver-gpio";
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wakeup-gpios = <&ioport6 1 GPIO_ACTIVE_HIGH>;
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enable-gpios = <&ioport6 2 GPIO_ACTIVE_HIGH>;
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max-bitrate = <20000>;
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#phy-cells = <0>;
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};
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};
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&ioport6 {
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status = "okay";
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};
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&pinctrl {
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sci0_default: sci0_default {
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group1 {
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/* TXD */
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psels = <RA_PSEL(RA_PSEL_SCI_0, 6, 9)>;
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drive-strength = "high";
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};
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group2 {
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/* RXD */
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psels = <RA_PSEL(RA_PSEL_SCI_0, 6, 10)>;
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};
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};
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};
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&sci0 {
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pinctrl-0 = <&sci0_default>;
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pinctrl-names = "default";
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interrupts = <95 1>, <94 1>, <93 1>, <92 1>;
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interrupt-names = "rxi", "txi", "tei", "eri";
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status = "okay";
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uart {
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status = "disabled";
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};
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i2c {
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status = "disabled";
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};
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dut: lin {
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phys = <&lin_click0>;
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status = "okay";
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};
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};

‎samples/drivers/lin/ncv7430/prj.conf‎

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CONFIG_LIN=y

‎samples/drivers/lin/ncv7430/samples.yaml‎

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sample:
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name: LIN driver NCV7430 sample
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tests:
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sample.drivers.lin.ncv7430:
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tags: lin
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depends_on: lin
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integration_platforms:
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- ek_ra8m1/r7fa8m1ahecbd
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harness: console
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harness_config:
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type: one_line
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regex:
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- "NCV7430 sample started"

‎samples/drivers/lin/ncv7430/src/main.c‎

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/*
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* Copyright (c) 2025 Renesas Electronics Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/sys/printk.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/lin.h>
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#include <zephyr/sys/byteorder.h>
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#include "ncv7430.h"
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#define LIN_BUS_BAUDRATE 19200U
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#define LIN_BUS_BREAK_LEN 13U
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#define LIN_BUS_BREAK_DELIMITER_LEN 1U
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#define LED_CHANGE_INTERVAL_MS 1000
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/* RGB LED test sequence (RGB888 format, separate channels) */
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static const struct rgb_led_color rgb_led_test_colors[8] = {
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{255, 0, 0}, {0, 255, 0}, {0, 0, 255}, {255, 255, 0},
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{0, 255, 255}, {255, 0, 255}, {255, 255, 255}, {0, 0, 0},
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};
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/* RGB LED color names in string */
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static const unsigned char rgb_test_color_name[][8] = {
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"Red", "Green", "Blue", "Yellow", "Cyan", "Magenta", "White", "Black",
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};
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static const struct lin_config dut_config = {
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.mode = LIN_MODE_COMMANDER,
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.baudrate = LIN_BUS_BAUDRATE,
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.break_len = LIN_BUS_BREAK_LEN,
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.break_delimiter_len = LIN_BUS_BREAK_DELIMITER_LEN,
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.flags = 0,
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};
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static unsigned int current_led_idx;
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int main(void)
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{
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const struct device *dev = DEVICE_DT_GET(DT_NODELABEL(dut));
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int ret;
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ret = device_is_ready(dev);
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if (!ret) {
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printk("NCV7430 device not found\n");
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return 0;
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}
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ret = lin_configure(dev, &dut_config);
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if (ret) {
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printk("LIN configure failed: %d\n", ret);
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return 0;
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}
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ret = lin_start(dev);
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if (ret) {
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printk("LIN start failed: %d\n", ret);
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return 0;
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}
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ret = ncv7430_init(dev, NCV7430_NODE_ADDRESS);
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if (ret) {
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printk("NCV7430 initialization failed: %d\n", ret);
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return 0;
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}
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printk("NCV7430 sample started\n");
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current_led_idx = 0;
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while (true) {
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struct rgb_led_color color = rgb_led_test_colors[current_led_idx];
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struct rgb_led_color read_color;
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uint32_t color_code;
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ret = ncv7430_set_led_color(dev, NCV7430_NODE_ADDRESS, &color);
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if (ret != 0) {
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printk("Failed to set LED color: %d\n", ret);
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return 0;
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}
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ret = ncv7430_get_led_color(dev, NCV7430_NODE_ADDRESS, &read_color);
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if (ret != 0) {
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printk("Failed to get LED color: %d\n", ret);
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return 0;
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}
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color_code = sys_get_be24((uint8_t *)&read_color);
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printk("Set LED color: %s - read back actual color code: 0x%06X\n",
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rgb_test_color_name[current_led_idx], color_code);
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if ((read_color.red != color.red) || (read_color.green != color.green) ||
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(read_color.blue != color.blue)) {
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printk("Warning: Mismatch in set and read back color "
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"values!\n");
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}
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current_led_idx++;
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if (current_led_idx == ARRAY_SIZE(rgb_led_test_colors)) {
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current_led_idx = 0;
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}
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k_msleep(LED_CHANGE_INTERVAL_MS);
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}
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return 0;
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}

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