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


#include "SGMeter.h"

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels



// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library. 
// On an arduino UNO:       A4(SDA), A5(SCL)
// On an arduino MEGA 2560: 20(SDA), 21(SCL)
// On an arduino LEONARDO:   2(SDA),  3(SCL), ...
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


unsigned int val[7];
byte i;

void setup()
{
  Serial.begin(9600);
  oled.begin(SSD1306_EXTERNALVCC, SCREEN_ADDRESS);


}


unsigned long t_start = 0;

void loop()
{
  /* general */
  oled.clearDisplay();

  val[3] = map(analogRead(A0), 0, 1023, 0, 100);
    
  /* creates meters */
  //meter1(&oled, val, 76);
  //meter2(&oled, val, 38);
  //meter3(&oled, val, 0);
  //meter3(&oled, val, 127-37);
  //meter4(&oled, val, 38);
  //meter5(&oled, val, 38);
  meter6(&oled, val[3]);

  //t_start = ( t_start == 0) ? millis() : t_start;
  //circle_anim(&oled, t_start);

 /* render the image to the display */
  oled.display();
  delay(20);
}