#include <Arduino.h>  // por defecto la incluye cundo la enlace con el programa principal
 
// Led a controlar por PWM LED
#define LED_PIN01 12
#define LED_PIN02 13
#define LED_PIN03 14
#define LED_PIN04 15

const int espera = 50; // esperar 0,05 segundos
int ledPWMFrequency = 5000; // microsegundos
int ledPWMChanel     = 0; // canal generador de pulsos
int ledPWMResolution = 8; // resolucion de la potencia modulada 256 partes a 100%
int ledPWMDutyCycle  = 0; // longitud de pulso de potencia 0%

void configLED ( uint8_t ledPin, uint32_t freq, uint8_t canal, uint32_t resolucion, uint8_t dcycle);

void setup() {
  // habilita el puerto serire de comunicaciones serial usb
  Serial.begin (115200);
  delay(5000);  // tiempo para abrir el monitor
  Serial.println ( " ESP32 PWM OUT  test V00 R00" );

  configLED(LED_PIN01, ledPWMFrequency, 0, ledPWMResolution, ledPWMDutyCycle);
  configLED(LED_PIN02, ledPWMFrequency, 1, ledPWMResolution, ledPWMDutyCycle);
  configLED(LED_PIN03, ledPWMFrequency, 2, ledPWMResolution, ledPWMDutyCycle);
  configLED(LED_PIN04, ledPWMFrequency, 3, ledPWMResolution, ledPWMDutyCycle);
}

void loop() {
  int i ;
    // put your main code here, to run repeatedly:
  for ( i = 0; i < 250; i++){
    Serial.printf ( "\n valor i -> %i \t duty -> %i ", i, ledPWMDutyCycle);
    ledPWMDutyCycle = map ( i, 0, 255, 0, 255);
    ledcWrite(ledPWMChanel, ledPWMDutyCycle);
    
    ledcWrite(0, ledPWMDutyCycle);
    ledcWrite(1, ledPWMDutyCycle);
    ledcWrite(2, ledPWMDutyCycle);
    ledcWrite(3, ledPWMDutyCycle);
    
    delay(espera);
  }
}

 /**************************************************************
  *        FUNCIONES DE CONFIGURACION PWM
  **************************************************************/

void configLED ( uint8_t ledPin, uint32_t freq, uint8_t canal, uint32_t resolucion, uint8_t dcycle){
    // ajuste del canal y frecuencia del PWM
  ledcSetup (canal, freq, resolucion);
  ledcAttachPin(ledPin, canal);
  ledcWrite(canal, dcycle);
};