IFD:PhysicalComp2011/Julia Putscher/Codes for Arduino and Processing: Difference between revisions

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import processing.serial.*;
import processing.serial.*;
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==Heartrate Sensor - Circuit With Amplifier==
===Arduino===
define mask 255 // kill top bits
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int potPin = 0; // select the input pin for the pot
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int ledPin = 13; // select the pin for the LED
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int val = 16706; // variable to store the value coming from the sensor
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int val2 =0;
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int a =0;
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int b =0;
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int beats[]= {0,0,0,0,0};// to track last five reads for a pattern
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boolean beated = false;
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//function dec
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boolean getBioData();
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void setup() {
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pinMode(ledPin, OUTPUT); // declare the ledPin as an OUTPUT
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Serial.begin(9600);
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}
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void loop() {
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char check=' ';
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val = analogRead(potPin); // read the value from the sensor
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if (Serial.read() =='a'){ // check buffer for an 'a'
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val2 = val;
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b= val & mask;
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a =((val2>>8) & mask); //just in case mask
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delay(20);
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// Serial.print("b"); // debug
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// Serial.print(b);
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Serial.print(a,BYTE);
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Serial.print(b,BYTE);
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if (getBioData()){ // call bio function
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Serial.print('b',BYTE);
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}
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else Serial.print('n',BYTE);
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}
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}
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boolean getBioData(){
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int beatVal = analogRead(potPin); // read the value from the sensor
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beats[4] = beatVal; // put in back of array
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int beatDif = beats[5 - 1] - beats[0];
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for (int i = 0; i < 5;i++){
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beats[i] = beats[i+1]; // push zero out front
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}
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// check for beat
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if ( beatDif > 10 && (beated != true)){
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beated = true;
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return true;
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}
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else if( beatDif < 2 ){
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beated = false;
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return false;
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}
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else return false;
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}
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===Processing===
import processing.serial.*;
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Serial port; // Create object from Serial class
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int val; // Data received from the serial port
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int WIDTH=800; // set width
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int number=0;
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int num[] = new int[3];
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int points[]= new int[WIDTH]; // points to be drawn from incoming data
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char beat=' ';
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int beats=0;
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int dropNum[] = new int[4]; // array used to compare data not needed
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void setup() {
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println(Serial.list());
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size(WIDTH, 700);
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frameRate(30);
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port = new Serial(this,"COM4", 9600); // local USB- port
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}
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void draw() {
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background(0);// to erase
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port.write('a');
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if (2 < port.available()) { // wait for three bytes
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for (int i=0;i<3;i++){
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num[i] = port.read(); // read them into an array
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}
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//println( num[0]);
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//println( num[1]);
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number = (num[0] << 8)+num[1]; // num range add two incoming bytes together after shifting
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beat = (char) num[2]; // look to see if there is a 'b' to signal a beat
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println(beats);
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}
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stroke(0,255,100);
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if (beat == 'b'){// sent from arduino
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beats++;
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}
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// draw heart beat data
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strokeWeight(1);
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points[(WIDTH/2)] = number; // strat drawing half way accross screen give current reading to array
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//goes through all points and draws a line between consecutive ones
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for (int i=1 ;i< points.length-1; i++){
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points[i]= points[i+1];
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line(i,height-points[i-1]-40,i,height-points[i]-40);
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}
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}
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