Arduino optical sensor serial -> Processing

prismspecs

Hey all,

I've been working through a bunch of tutorials today trying to get my old mouse sensor to work as a camera of sorts. Found this one, but the discussion was in French.

Here's the Arduino code:

/*  
 /*******************************/
/* OptiMouse, Benoît ROUSSEAU  */
/* - dialoguer avec un ADS2051 */
/* récupérer sur une souris    */
/* optique                     */
/*******************************/

#define PIN_CLOCK 2
#define PIN_DATA 3
#define _BV(bit) (1 << (bit))

byte readRegister (byte adresse)
{
  int i = 7;
  byte retour = 0;

  pinMode (PIN_DATA, OUTPUT);
  for (; i>=0; i--)
  {
     digitalWrite (PIN_CLOCK, LOW);
     digitalWrite (PIN_DATA, adresse & (1 << i));
     digitalWrite (PIN_CLOCK, HIGH);
  }

  pinMode (PIN_DATA, INPUT);
  delayMicroseconds(100);

  for (i=7; i>=0; i--)
  {
    digitalWrite (PIN_CLOCK, LOW);
    digitalWrite (PIN_CLOCK, HIGH);
    retour |= (digitalRead (PIN_DATA) << i);
  }
  delayMicroseconds(100);

  return retour;
}

void writeRegister (byte adresse, byte donnee)
{
  int i = 7;

  adresse |= 0x80;

  pinMode (PIN_DATA, OUTPUT);
  for (; i>=0; i--)
  {

     digitalWrite (PIN_CLOCK, LOW);
     digitalWrite (PIN_DATA, adresse & (1 << i));
     digitalWrite (PIN_CLOCK, HIGH);
  }

  for (i=7; i>=0; i--)
  {
    digitalWrite (PIN_CLOCK, LOW);
     digitalWrite (PIN_DATA, donnee & (1 << i));
     digitalWrite (PIN_CLOCK, HIGH);
  }

}

void sendImage()
{
  byte val;
  byte adr;
  Serial.print (">IMG:");

  writeRegister (0x0a, 0x09);
  for (int i=0; i<256; i++)
  {
    do {
      adr = readRegister (0x0d);
      val = readRegister (0x0c);
    } while (val & 0x80);
//    Serial.print (adr, HEX);
//    Serial.print ('>', BYTE);
    Serial.print (val, HEX);
//    Serial.print (13, BYTE);
  } 

  Serial.println ();
  writeRegister (0x0a, 0x00);
}

void setup()
{
  pinMode (PIN_CLOCK, OUTPUT);
  pinMode (PIN_DATA, INPUT);
  Serial.begin(38400);
}

void loop ()
{
  if (readRegister (0x02))
  {

    Serial.print ('>');
    Serial.print (readRegister (0x00), DEC);
    Serial.print ('-');
    Serial.print (readRegister (0x01), DEC);
    Serial.print ('-');
    Serial.print (readRegister (0x03), DEC);
    Serial.print ('-');
    Serial.print (readRegister (0x04), DEC);
    Serial.println ();

  }

  // check if Processing sketch is okay for new frame
  if (Serial.available())
  {
    Serial.read();
    sendImage();
  }
}

I'm having a hard time understanding what some of the serial output is for. Any thoughts on how to get this to work with a veeeery basic Processing sketch would very much be appreciated.

What I have so far is this: import processing.serial.*; Serial port;

final int rate = 38400;

// hold camera data
int[] frame;
final int frameX = 16;
final int frameY = 16;
final int frameLen = frameX * frameY;
int serialCounter;

float sz;  // size of pixel

void setup() {
  size(400, 400);
  noStroke();
  //println(Serial.list());
  String portName = Serial.list()[5];
  port = new Serial(this, portName, rate);
  //println("Using " + portName + " as serial device.");

  // frame buffer
  frame = new int[frameLen];

  sz = width/frameX;
}

void draw() {

  //int i = 0;  // pixel counter
}

// tell arduino we are good for another
void keyPressed()
{
  port.write("a");  // arbitrary char... "thank you sir may I have another?!"
  serialCounter = frameLen;

  if ( port.available() > 0)
  { 
    //println(port.available());
    for (int i = 0; i < frameLen; i++) {
      //println(port.read());

      frame[i] = port.read();
      println(frame[i]);
    }
  }

  background(0);

  for ( int i = 0; i < frameLen; i++ )
  {
    // data seems to be in 0-63 range...
    fill(map(frame[i], 20, 63, 0, 255));
    rect((i % frameX * sz), (i / frameY * sz), sz, sz);
  }
}

but it's not quite working.