#include <SPI.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>

// SPI - Serial Peripheral interface Used by microcontroller for serial communication with peripheral device 
// Wire.h is for i2c protocol ic 2 ic 
// Adafruit _SSD1306 this takes care of low level communication with the hard ware
// Adafruit_GFX - it offers some functions that will help to write graphical syntax 

#define screen_width 128
#define screen_height 64

Adafruit_SSD1306 oled_display(screen_width,screen_height,&Wire,-1);

void setup() {
  Serial.begin(115200);
  if(!oled_display.begin(SSD1306_SWITCHCAPVCC,0x3C)){
    Serial.println(F("SSD 1306 allocation failed "));
    for(;;){}
  }
  delay(2000);

  

}

void loop() {  
  // draw a circle
  oled_display.clearDisplay();
  oled_display.drawCircle(50,30,30,WHITE);
  oled_display.display();
  delay(2000);

  // fill the circle
  oled_display.clearDisplay();
  oled_display.fillCircle(50,30,30,WHITE);
  oled_display.display();
  delay(2000);
  
}


/* 
128 x 64
8 pages
128 collums
each column has 8 bits of data
*/