#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.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)
#define OLED_RESET  4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define C_X 63
#define C_Y 31
int h_degree[]={270,300,330,0,30,60,90,120,150,180,210,240};
void setup() {

  display.begin(SSD1306_SWITCHCAPVCC, 0x3c); // Address 0x3C for 128x32
  display.display();
  delay(1000);
  
  // Clear the buffer.
  display.clearDisplay();
   
  // text display tests
  display.drawCircle(C_X,C_Y,31,SSD1306_WHITE);
  display.display();
  
  //display.setCursor(63, 31);


}
float a=45;
float theta_r,x,y;
int i=360;
int h=11,m=45,t;
void loop() {
  //display.chearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,30);
  display.print(h);
  display.print(":");
  display.print(m);
  t=90-h*30-m*5/60.0;
  //draw hours

  theta_r=t*(PI/180.0);
  x = C_X+15*cos(theta_r);
  y = C_Y-15*sin(theta_r);
  display.drawLine(C_X,C_Y,x,y,SSD1306_WHITE);
  //draw mins
  t=90-m*6;
  theta_r=t*(PI/180.0);
  x = C_X+25*cos(theta_r);
  y = C_Y-25*sin(theta_r);
  display.drawLine(C_X,C_Y,x,y,SSD1306_WHITE);
  display.display();
  
}