#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define LED_PIN   12 
#define TFT_CS    15
#define TFT_RST   4
#define TFT_DC    2


Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

hw_timer_t *timer = NULL; 

volatile int32_t secondCounter = 0; 
volatile bool ledState = false;     


int32_t lastSecond = -1;
void IRAM_ATTR onTimer() {

  secondCounter++; 


  ledState = !ledState;
  digitalWrite(LED_PIN, ledState);
}

void setup() {
  Serial.begin(115200); 
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW); 
  
  tft.begin();
  tft.setRotation(1); 
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.println("Demo Temporizador ESP32");
  tft.println("+ LED en Pin 12");
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(3);

  timer = timerBegin(1000000); 
  timerAttachInterrupt(timer, &onTimer);
  timerAlarm(timer, 1000000, true, 0);
}

void loop() {
  if (secondCounter != lastSecond) {
    lastSecond = secondCounter;
    tft.fillRect(50, 80, 150, 40, ILI9341_BLACK); 
    tft.setCursor(50, 80);
    tft.print("Seg: ");
    tft.print(secondCounter);

    // Imprimir también en el Monitor Serie para depurar
    Serial.print("Interrupcion! Segundo: ");
    Serial.println(secondCounter);
  }
}