Reading serial value - Major problems

hi have took apart air swimmer ( inflatable shark controller) , have soldered few wires on bypass each of buttons (left right , down) need send low signal when keyboard button pressed. low signal allows logic board on controller send correct infrared signal.

i have no idea why code isn't working , have went through 3 controllers trying right. have ideas?

code: [select]

import processing.serial.*;
import processing.video.*;
serial port;
capture cam;
int val;
color fillval = color(126);

void setup() {
    string portname = serial.list()[0];
    port = new serial(this, portname, 9600);
      size(550, 400);

  // if no device specified, use default.
  cam = new capture(this, 550 , 400);
}
//key detection begin
void keypressed() {
  if (key == coded) {
    if (keycode == up) {
      port.write(65);
      fillval = 255;
    } else if (keycode == down) {
      port.write(66);
      fillval = 0;
    } else if (keycode == right) {
      port.write(67);
      fillval = 100;
    } else if (keycode == left) {
     port.write(68);
      fillval = 200;
    }
  } else {
    fillval = 126;
  }
}

//* void keyreleased() {
// if (key == coded) {
//   if (keycode == up) {
//     port.write(69);
//     fillval = 0;
//   } else if (keycode == down) {
//     port.write(70);
//     fillval = 255;
//   } else if (keycode == right) {
//     port.write(71);
//     fillval = 200;
//   } else if (keycode == left) {
//    port.write(72);
//     fillval = 100;
//   }
//  } else {
//    fillval = 126;
//  }
//}

//key detection end

void draw() {
  //camera code begin
  if (cam.available() == true) {
  cam.read();
  image(cam, 0, 0);
  //camera code end
  //dashboard interface begin
  fill(100); //left big circle
  ellipse(80,350,100,100); // left big circle
  fill(100); // right big circle
  ellipse(475,350,100,100); // right big circle
  fill(100); // large rectangle
  stroke(100); // large rectangle
  rect(0, 350, 550, 75); // large rectangle
  fill(0,100,0); // left radar circle
  stroke(0); // left radar circle
  ellipse(80,350,90,90); // left radar circle
  fill(200); // left control stick
  stroke(0); // left control stick
  rect(180, 360, 10, 75); // left control stick
  fill(200); // left control stick
  stroke(0); // left control stick
  rect(205, 360, 10, 75); // left control stick
  fill(200); // right control stick
  stroke(0); // right control stick
  rect(320, 360, 10, 75); // right control stick
  fill(200); // right control stick
  stroke(0); // right control stick
  rect(355, 360, 10, 75); // right control stick
  fill(255,0,0); // right control stick
  stroke(0); // right control stick
  rect(175, 360, 45, 10); // right control stick
  fill(0,100,0); // right control stick
  ellipse(475,350,90,90); // right control stick
  fill(200); // right control stick
  stroke(0); // right control stick
  rect(180, 360, 10, 75); // right control stick
  fill(200); // right control stick
  stroke(0); // right control stick
  rect(205, 360, 10, 75); // right control stick
  fill(255,0,0); // right control stick
  stroke(0);// right control stick
  rect(320, 360, 45, 10); // right control stick
  fill(255,0,0); // left control stick
  stroke(0); // left control stick
  rect(175, 360, 45, 10); // left control stick
  fill(100); //entre clock
  rect(220, 320,100,30);// centre clock
  fill(100); //entre clock
  stroke(0);
  rect(225, 325,90,20);// centre clock
  //interface end

}



}


arduino code -

code: [select]

char val; // data received serial port

void setup(){
  pinmode(3,output);//add led on pin 13
  pinmode(5,output);//add led on pin 13 kicks
  pinmode(7,output);//add led on pin 13 kicks
  pinmode(9,output);//add led on pin 13 kicks
  serial.begin(9600);//init serial library (make sure processing sending data @ same baud rate)
}

void loop() {
digitalwrite(3, high); // turn led on
digitalwrite(5, high); // turn led on
digitalwrite(7, high); // turn led on
digitalwrite(9, high); // turn led on
if (serial.available()) { // if data available read,
val = serial.read(); // read , store in val
}
if (val == 'a') { // if h received
digitalwrite(3, low); // turn led on
digitalwrite(5, high); // turn led on
digitalwrite(7, high); // turn led on
digitalwrite(9, high); // turn led on
} else {
digitalwrite(3, high); // otherwise turn off
}
   if (val == 'b') { // if h received
digitalwrite(3, high); // turn led on
digitalwrite(5, low); // turn led on
digitalwrite(7, high); // turn led on
digitalwrite(9, high); // turn led on
} else {
digitalwrite(5, high); // otherwise turn off
}
   if (val == 'c') { // if h received
digitalwrite(3, high); // turn led on
digitalwrite(5, high); // turn led on
digitalwrite(7, low); // turn led on
digitalwrite(9, high); // turn led on
} else {
digitalwrite(7, high); // otherwise turn off
}
   if (val == 'd') { // if h received
digitalwrite(3, high); // turn led on
digitalwrite(5, high); // turn led on
digitalwrite(7, high); // turn led on
digitalwrite(9, low); // turn led on
} else {
digitalwrite(9, high); // otherwise turn off
}

}

anyone ideas helpful im loosing plot

quote

i have no idea why code isn't working a

can tell more explicit did expect , got?

a quick @ code reveals

if (serial.available()) { // if data available read,
val = serial.read(); // read , store in val
}

i allways use    if (serial.available() > 0)  - more explicit

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