#include <zephyr.h>
#include <misc/printk.h>
#include <gpio.h>

#define LED_PORT		DT_GPIO_STM32_GPIOC_LABEL
#define LED_PIN			9

void main(void)
{
	int cnt = 0;
	struct device *dev;

	dev = device_get_binding(LED_PORT);
	gpio_pin_configure(dev, LED_PIN, GPIO_DIR_OUT);

	while (1)
	{
		gpio_pin_write(dev, LED_PIN, cnt % 2);
		cnt++;
		k_sleep(500);
	}
}