#include <stdio.h>
#include <esp_log.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "driver/ledc.h"

#define ledPin GPIO_NUM_2
#define PWM_SPEED_MODE LEDC_LOW_SPEED_MODE
#define PWM_CHANNEL LEDC_CHANNEL_0

ledc_timer_config_t ledc_timer;
ledc_channel_config_t ledc_channel;

void config_pwm_pin(gpio_num_t INPUT_PIN, ledc_timer_config_t* timer_config, ledc_channel_config_t* channel_config){
    
    // Timer Configuration
    timer_config -> speed_mode = PWM_SPEED_MODE;
    timer_config -> duty_resolution = LEDC_TIMER_13_BIT;
    timer_config -> timer_num = LEDC_TIMER_0;
    timer_config -> freq_hz = 50;
    timer_config -> clk_cfg = LEDC_AUTO_CLK;
    ledc_timer_config(timer_config);

    // Channel Configuration
    channel_config -> gpio_num = INPUT_PIN;
    channel_config -> speed_mode = PWM_SPEED_MODE;
    channel_config -> channel = PWM_CHANNEL;
    channel_config -> intr_type = LEDC_INTR_DISABLE;
    channel_config -> timer_sel = LEDC_TIMER_0;
    channel_config -> duty = 0;
    channel_config -> hpoint = 0;
    ledc_channel_config(channel_config);

}

void app_main() {
  config_pwm_pin(ledPin, &ledc_timer, &ledc_channel);
  gpio_set_direction(ledPin, GPIO_MODE_INPUT_OUTPUT);
  // const ledc_timer_config_t ledc_timer = {
  //   .speed_mode = PWM_SPEED_MODE,
  //   .duty_resolution = LEDC_TIMER_13_BIT,
  //   .timer_num = LEDC_TIMER_0,
  //   .freq_hz = 50,
  //   .clk_cfg = LEDC_AUTO_CLK
  // };

  // const ledc_channel_config_t ledc_channel = {
  //   .gpio_num = ledPin,
  //   .speed_mode = PWM_SPEED_MODE,
  //   .channel = PWM_CHANNEL,
  //   .intr_type = LEDC_INTR_DISABLE,
  //   .timer_sel = LEDC_TIMER_0,
  //   .duty = 0,
  //   .hpoint = 0
  // };

  // ledc_timer_config(ledc_timer);
  // ledc_channel_config(ledc_channel);

  while (true) {
    ledc_set_duty(PWM_SPEED_MODE, PWM_CHANNEL, 5000);
    ledc_update_duty(PWM_SPEED_MODE, PWM_CHANNEL);
    //vTaskDelay(100000);
  }
}