firmware/src/main/hello_world_main.c


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#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "hal/gpio_types.h"

#include <stdio.h>

void app_main(void)
{
	gpio_reset_pin(5);
	gpio_set_direction(5, GPIO_MODE_OUTPUT_OD);
	int i = 0;
	while (1) {
		printf("Hello world! %i\n", ++i);
		fflush(stdout);
		gpio_set_level(5, 1);
		vTaskDelay(1000 / portTICK_PERIOD_MS);
		gpio_set_level(5, 0);
		vTaskDelay(1000 / portTICK_PERIOD_MS);
	}
}