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samples: boards: renesas: Add sample for CTSU input driver
Add sample for CTSU input driver using QE config files on RSK-RX130-512KB Signed-off-by: Minh Tang <[email protected]>
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‎samples/boards/renesas/ctsu_input/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(renesas_ctsu)
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target_sources(app PRIVATE src/main.c)
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if(CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG)
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zephyr_include_directories(src/qe_generated_files)
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zephyr_sources(src/qe_generated_files/qe_touch_config.c)
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endif()

‎samples/boards/renesas/ctsu_input/boards/rsk_rx130_512kb.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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&ctsu {
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status = "okay";
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};
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&onboard_slider {
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zephyr,code = <1>;
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};
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&onboard_button_1 {
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zephyr,code = <10>;
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};
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&onboard_button_2 {
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zephyr,code = <11>;
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};
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/ {
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leds {
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testled0: testled0 {
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gpios = <&ioportd 3 GPIO_ACTIVE_LOW>;
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label = "LED0";
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};
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testled1: testled1 {
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gpios = <&ioportd 4 GPIO_ACTIVE_LOW>;
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label = "LED1";
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};
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testled2: testled2 {
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gpios = <&ioporte 6 GPIO_ACTIVE_LOW>;
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label = "LED2";
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};
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testled3: testled3 {
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gpios = <&ioporte 7 GPIO_ACTIVE_LOW>;
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label = "LED3";
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};
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};
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};

‎samples/boards/renesas/ctsu_input/prj.conf‎

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CONFIG_GPIO=y
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CONFIG_INPUT=y
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CONFIG_INPUT_MODE_SYNCHRONOUS=y
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CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG=y

‎samples/boards/renesas/ctsu_input/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/sys/util.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/gpio/gpio_emul.h>
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#include <zephyr/kernel.h>
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#include <zephyr/input/input.h>
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#include <zephyr/input/input_renesas_rx_ctsu.h>
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#ifdef CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG
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#include "qe_touch_config.h"
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#endif /* CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG */
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static const struct device *const test_touch_dev = DEVICE_DT_GET(DT_NODELABEL(ctsu));
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#define BUTTON_1_IDX DT_NODE_CHILD_IDX(DT_NODELABEL(onboard_button_1))
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#define BUTTON_2_IDX DT_NODE_CHILD_IDX(DT_NODELABEL(onboard_button_2))
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#define SLIDER_IDX DT_NODE_CHILD_IDX(DT_NODELABEL(onboard_slider))
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#define STACKSIZE 1024
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#define PRIORITY 7
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#define LED0_NODE DT_NODELABEL(testled0)
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#define LED1_NODE DT_NODELABEL(testled1)
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#define LED2_NODE DT_NODELABEL(testled2)
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#define LED3_NODE DT_NODELABEL(testled3)
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#define NUM_TEST_LED 4
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#define LED_ON 1
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#define LED_OFF 0
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#define DEBOUNCE_TIMES 3
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#define DEBOUNCE_INTERVAL_MS (500 / DEBOUNCE_TIMES)
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enum {
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TOUCH_BUTTON_1 = 10,
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TOUCH_BUTTON_2 = 11,
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TOUCH_SLIDER = 1,
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};
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static const struct gpio_dt_spec led0 = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
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static const struct gpio_dt_spec led1 = GPIO_DT_SPEC_GET(LED1_NODE, gpios);
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static const struct gpio_dt_spec led2 = GPIO_DT_SPEC_GET(LED2_NODE, gpios);
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static const struct gpio_dt_spec led3 = GPIO_DT_SPEC_GET(LED3_NODE, gpios);
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static const struct gpio_dt_spec *leds[] = {&led0, &led1, &led2, &led3};
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static volatile int led_state;
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static volatile int leds_on_off[NUM_TEST_LED] = {0};
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static volatile int current_main_led;
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static volatile int event_count[DT_CHILD_NUM_STATUS_OKAY(DT_NODELABEL(ctsu))] = {0};
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static uint16_t last_code;
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static volatile int32_t last_val[DT_CHILD_NUM_STATUS_OKAY(DT_NODELABEL(ctsu))];
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static struct k_sem btn1_sem;
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static struct k_sem btn2_sem;
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static struct k_sem sldr_sem;
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static struct k_sem render_sem;
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static void sample_setup(void)
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{
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gpio_pin_configure_dt(&led0, GPIO_OUTPUT_INACTIVE);
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gpio_pin_configure_dt(&led1, GPIO_OUTPUT_INACTIVE);
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gpio_pin_configure_dt(&led2, GPIO_OUTPUT_INACTIVE);
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gpio_pin_configure_dt(&led3, GPIO_OUTPUT_INACTIVE);
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k_sem_init(&btn1_sem, 0, 1);
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k_sem_init(&btn2_sem, 0, 1);
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k_sem_init(&sldr_sem, 0, 1);
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k_sem_init(&render_sem, 0, 1);
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#ifdef CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG
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int ret = renesas_rx_ctsu_group_configure(
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test_touch_dev, (struct renesas_rx_ctsu_touch_cfg *)&g_qe_touch_instance_config01);
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if (ret < 0) {
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printk("Failed to configure QE Touch: %d\n", ret);
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return;
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}
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#endif /* CONFIG_INPUT_RENESAS_RX_QE_TOUCH_CFG */
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}
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void button1_task(void)
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{
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while (1) {
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k_sem_take(&btn1_sem, K_FOREVER);
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if (led_state == 0) {
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/** Current leds are OFF, do nothing */
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} else {
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if (led_state >= 15) {
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led_state = 1;
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} else {
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led_state++;
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}
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}
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k_sem_give(&render_sem);
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}
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}
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void button2_task(void)
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{
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int prev_state = 0;
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while (1) {
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k_sem_take(&btn2_sem, K_FOREVER);
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if (led_state == 0) {
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/** Current led state is OFF */
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if (prev_state == 0) {
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/** First time power on */
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led_state = 1;
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} else {
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/** Restore prev_state */
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led_state = prev_state;
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}
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} else {
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prev_state = led_state;
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led_state = 0;
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}
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k_sem_give(&render_sem);
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}
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}
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void slider_task(void)
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{
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while (1) {
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k_sem_take(&sldr_sem, K_FOREVER);
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if (led_state == 0) {
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continue;
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}
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int curr_val = last_val[SLIDER_IDX];
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if (curr_val != TOUCH_OFF_VALUE) {
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if (curr_val == 100) {
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curr_val = 99;
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}
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current_main_led = 3 - (curr_val / 25);
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}
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k_sem_give(&render_sem);
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}
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}
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void render_task(void)
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{
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while (1) {
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k_sem_take(&render_sem, K_FOREVER);
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for (int i = 0; i < NUM_TEST_LED; i++) {
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leds_on_off[(current_main_led + i) % 4] =
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((led_state >> i) & 0x1) ? LED_ON : LED_OFF;
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}
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for (int i = 0; i < NUM_TEST_LED; i++) {
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gpio_pin_set_dt(leds[i], leds_on_off[i]);
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}
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}
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}
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static void test_touch_keys_cb_handler(struct input_event *evt, void *user_data)
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{
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switch (evt->code) {
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case TOUCH_BUTTON_1:
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if (evt->value == 0) {
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printk("Button 1 released\n");
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if (last_val[BUTTON_1_IDX] != 0) {
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k_sem_give(&btn1_sem);
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}
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} else {
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event_count[BUTTON_1_IDX]++;
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printk("Button 1 pressed %d time(s)\n", event_count[BUTTON_1_IDX]);
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}
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last_val[BUTTON_1_IDX] = evt->value;
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break;
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case TOUCH_BUTTON_2:
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if (evt->value == 0) {
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printk("Button 2 released\n");
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if (last_val[BUTTON_2_IDX] != 0) {
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k_sem_give(&btn2_sem);
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}
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} else {
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event_count[BUTTON_2_IDX]++;
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printk("Button 2 pressed %d time(s)\n", event_count[BUTTON_2_IDX]);
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}
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last_val[BUTTON_2_IDX] = evt->value;
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break;
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case TOUCH_SLIDER:
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if (evt->value == TOUCH_OFF_VALUE) {
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printk("Slider released\n");
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if (last_val[SLIDER_IDX] != TOUCH_OFF_VALUE) {
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}
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} else {
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if (last_val[SLIDER_IDX] == TOUCH_OFF_VALUE) {
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event_count[SLIDER_IDX]++;
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printk("Slider pressed\n");
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}
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printk("Position: %d\n", evt->value);
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}
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k_sem_give(&sldr_sem);
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last_val[SLIDER_IDX] = evt->value;
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break;
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default:
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break;
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}
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last_code = evt->code;
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}
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INPUT_CALLBACK_DEFINE(test_touch_dev, test_touch_keys_cb_handler, NULL);
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K_THREAD_DEFINE(button1_id, STACKSIZE, button1_task, NULL, NULL, NULL, PRIORITY, 0, 0);
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K_THREAD_DEFINE(button2_id, STACKSIZE, button2_task, NULL, NULL, NULL, PRIORITY, 0, 0);
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K_THREAD_DEFINE(slider_id, STACKSIZE, slider_task, NULL, NULL, NULL, PRIORITY, 0, 0);
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K_THREAD_DEFINE(render_id, STACKSIZE, render_task, NULL, NULL, NULL, PRIORITY, 0, 0);
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int main(void)
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{
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sample_setup();
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printk("On board CTSU components sample started!\n");
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printk("Press on touch nodes for sample\n");
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return 0;
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}

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