#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display(128, 64, &Wire, -1);
#define DAC_PIN 25 

const uint8_t signalData[] = {
  128, 140, 152, 164, 175, 185, 194, 202, 209, 214,
  218, 220, 221, 220, 218, 214, 209, 202, 194, 185,
  175, 164, 152, 140, 128, 115, 103, 91, 80, 70,
  61, 53, 46, 41, 37, 35, 34, 35, 37, 41,
  46, 53, 61, 70, 80, 91, 103, 115,
  128, 140, 152, 164, 175, 185, 194, 202, 209, 214,
  218, 220, 221, 220, 218, 214, 209, 202, 194, 185,
  175, 164, 152, 140, 128, 115, 103, 91, 80, 70,
  61, 53, 46, 41, 37, 35, 34, 35, 37, 41,
  46, 53, 61, 70, 80, 91, 103, 115,
  128, 140, 152, 164, 175, 185, 194, 202, 209, 214,
  218, 220, 221, 220, 218, 214, 209, 202, 194, 185,
  175, 164, 152, 140, 128, 115, 103, 91, 80, 70,
  61, 53, 46, 41, 37, 35, 34, 35, 37, 41,
  46, 53, 61, 70, 80, 91, 103, 115
};

void setup() {
  Serial.begin(9600);
  pinMode(DAC_PIN, OUTPUT);

  Wire.begin(15, 2); 

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("Error al iniciar"));
    for(;;);
  }
  display.display();
  delay(300);
  display.clearDisplay();
}

void loop() {
  display.clearDisplay();
  display.setCursor(0,0);
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

    for (int i = 0; i < sizeof(signalData) - 1; i++) {
      
    int y1 = map(signalData[i], 0, 255, 64 - 1, 0);
    int y2 = map(signalData[i + 1], 0, 255, 64 - 1, 0);
    display.drawLine(i, y1, i + 1, y2, SSD1306_WHITE);

    dacWrite(DAC_PIN, signalData[i]);

    delay(100);
  }

  display.display();
  delay(300);
}