//Example - Exernal interrupt
#include "U8glib.h"

U8GLIB_SSD1306_128X64 u8g;



#define LED 13
int toggle=0;

const uint8_t rook_bitmap[] U8G_PROGMEM = {
  0x00,         // 00000000 
  0x55,         // 01010101
  0x7f,          // 01111111
  0x3e,         // 00111110
  0x3e,         // 00111110 
  0x3e,         // 00111110
  0x3e,         // 00111110 
  0x7f           // 01111111
  };

const uint8_t clear_bitmap[] U8G_PROGMEM = {
  00000000,         // 00000000 
  01100110,         // 01010101
  11111111,          // 01111111
  01111110,         // 00111110
  00111100,         // 00111110 
  00011000,         // 00111110
  00010000,         // 00111110 
  00000000           // 01111111
  };

  
void setup() {
  // put your setup code here, to run once:

  Serial.begin(115200); // setup serial
  pinMode(LED, OUTPUT); // setup output
  attachInterrupt(2,displaymic,RISING); //start the int.0   // opton 1 to configure hardware/external interupt
 // attachInterrupt(digitalPinToInterrupt(21), displaymic,RISING); // option 2 


}

//ISR - external interupt
void displaymic(){
  Serial.write("micros = ");
  Serial.println("button pressed");

  Serial.println(micros());
  
  toggle=!toggle;
 //   delay(300);
  }
  

  
  


void draw() {
  // graphic commands to redraw the complete screen should be placed here  
  u8g.drawBitmapP( 0, 0, 1, 8, rook_bitmap);
}

void clear(void){
  u8g.drawBitmapP(20, 20, 1, 8, clear_bitmap);
  Serial.println("heart");
}

void loop() {
  // put your main code here, to run repeatedly:
  // turn on/off LED
  digitalWrite(LED, HIGH);
  delay(500);
  digitalWrite(LED, LOW);
  delay(500);
  


  
  Serial.print("toggle: ");
  Serial.println(toggle);
    u8g.firstPage(); //marks the beginning of the picture loop.
  do {
    u8g.setColorIndex(1); // set the colour to white
    if (toggle==1){
      draw();
      Serial.println("rook");
    }
   /* else if (toggle==2){
      u8g.drawTriangle(14,40, 45,15, 70,40);
      Serial.println("triangle");
    }
    else if (toggle==3){
      u8g.drawBox(10,10, 50, 50);
      Serial.println("square");
    }
    
    else{
      clear();
      Serial.println("blank");
    */
    
    

    } while ( u8g.nextPage() ); //marks the end of the body of the picture loop
delay(1000);


}