//CODE USED TO GET DATA AND GRAPH IT FROM THE

// HEART MONITOR ARDUINO CODE

// in Java 

import processing.serial.*;

Serial port;  // Create object from Serial class

int val;      // Data received from the serial port

int WIDTH=800; // set width

int number=0;

int num[] = new int[3];

int points[]= new int[WIDTH]; // points to be drawn from incoming data

char beat=' ';

int beats=0;

int dropNum[] = new int[4]; // array used to compare data not needed

int dCount=0; // for data compare not needed

void setup() 

{

  println(Serial.list());

  size(WIDTH, 700);

  frameRate(30);

  // Open the port that the board is connected to and use the same speed (9600 bps)

  port = new Serial(this,Serial.list()[2], 9600);

}

void draw()

{  

  background(0);// to erase

  port.write('a');

  if (2 < port.available()) {  // wait for three bytes

    for (int i=0;i<3;i++){

      num[i] = port.read(); // read them into an array    

    }

    //println( num[0]); 

    //println( num[1]); 

    number = (num[0] << 8)+num[1]; // num range add two incoming bytes together after shifting

    beat = (char) num[2]; // look to see if there is a 'b' to signal a beat

    println(beats); 

  /* // used to look for beat pattern

    if (dCount > 2) dCount= 0; //start over 

    dropNum[dCount] = number;

    dCount++;

   */

  }

  stroke(0,255,100); // color stroke

  if (beat == 'b'){// sent from arduino

      beats++; 

    /* // used to look for beats

    //if (dropNum[2]-dropNum[0] > 5){ // or check yourself for beat

    // strokeWeight(10);

    //line(width/2,0,width/2,height);

    }

    */

  }

  // draw heart beat data

  strokeWeight(1);

  points[(WIDTH/2)] = number; // strat drawing half way accross screen give current reading to array

  //goes through all points and draws a line between consecutive ones

  for (int i=1 ;i<points.length-1;i++){

    points[i]= points[i+1];

    line(i,height-points[i-1]-40,i,height-points[i]-40);

  }

}