Learn ZEPHYR-RTOS with Real Code Examples

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>

#define LED_PIN 2
#define SLEEP_TIME_MS 500

default struct device *led_dev;

void blink_led(void)
{
    while(1) {
        gpio_pin_toggle(led_dev, LED_PIN);
        k_msleep(SLEEP_TIME_MS);
    }
}

void main(void)
{
    led_dev = device_get_binding("GPIO_0");
    gpio_pin_configure(led_dev, LED_PIN, GPIO_OUTPUT);
    blink_led();
}

Toggle an LED on a GPIO pin using a Zephyr thread.

void periodic_task(void *arg1, void *arg2, void *arg3)
{
    while(1) {
        printk("Periodic task running\n");
        k_sleep(K_SECONDS(1));
    }
}

K_THREAD_DEFINE(periodic_thread, 1024, periodic_task, NULL, NULL, NULL, 7, 0, 0);

Create a periodic thread to execute a task every 1 second.

#include <zephyr.h>
#include <device.h>
#include <drivers/sensor.h>

void main(void)
{
    struct device *dev = device_get_binding("SENSOR_0");
    struct sensor_value val;

    while(1) {
        sensor_sample_fetch(dev);
        sensor_channel_get(dev, SENSOR_CHAN_ALL, &val);
        printk("Sensor value: %d\n", val.val1);
        k_sleep(K_SECONDS(2));
    }
}

Read data from a sensor and print values periodically.