/**
* https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/log.html
* https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/gpio.html
**/
#include <stdio.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "driver/gpio.h"
#include <rom/ets_sys.h>

#define GPIO_LED 2
#define PWM_CYCLE_TIME 1000
#define DUTY_CYCLE 250

void app_main(void) {
    // Configura o pino GPIO para o modo OUTPUT
    gpio_pad_select_gpio(GPIO_LED);
    gpio_set_direction(GPIO_LED, GPIO_MODE_OUTPUT);

    while (1) {
        gpio_set_level(GPIO_LED, 0);
        for (int t=0; t<PWM_CYCLE_TIME; t++) {
            if (t==DUTY_CYCLE) {
                gpio_set_level(GPIO_LED, 1);
            }
            ets_delay_us(1);
        }
    }
}