#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int amplitude = 30;


float frequency = 0.1;


void drawSignalSine(float frec)
{
  float delay =  1/frec*1000;
  for (int i = 0; i < SCREEN_WIDTH; i++)
  {
    int y = round(amplitude * sin( 2*3.1459*frec * i) + SCREEN_HEIGHT / 2);    
    display.drawPixel(i, y, SSD1306_WHITE);
    //Serial.println(frec);
    //Serial.println(delay);
    //delayMicroseconds(delay);
  }
}

void setup()
{    
  //Serial.begin(115200);
  pinMode(A0, INPUT);
  
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
  {
    Serial.println(F("Error al inicializar la pantalla SSD1306"));
    for (;;)
      ;
  }

  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  analogReference(DEFAULT);
}

void loop()
{
  int x = analogRead(A0);
  
  int y = map(x, 0, 1023, 1, 25);
  float periodo = 1/(float)y;
  //Serial.println(y);
  
  display.clearDisplay();  
  drawSignalSine(y);  
  display.display();
  //delayMicroseconds(100); // Pequeña pausa para suavizar el cambio
}