hi, im a noob at processing, and i just found out how wounderfull the language is to use with arduino, becuase it opens up many more possibilities, and i'm having problems doing my first project.

i'm trying to make it so when i press a button on my keyboard, an led will turn on. But i'm getting several problems, most saying that "void" does not belong in the place i put it.

now this code IS NOT ANYWHERE NEAR THE CODE I WANT, this is simply an output test for the arduino, but i really don't know how to layout the language so it does not interfear with the arduinos translation to using processing.
if anybody could please fix up the code, and compile it to see if it works, because i cant get what im trying, so if anybody could just make it really quick, i would greatly apreciate it, heres the sample output code:



import processing.serial.*;

import cc.arduino.*;

Arduino arduino;

color off = color(4, 79, 111);
color on = color(84, 145, 158);

int[] values = { Arduino.LOW, Arduino.LOW, Arduino.LOW, Arduino.LOW,
Arduino.LOW, Arduino.LOW, Arduino.LOW, Arduino.LOW, Arduino.LOW,
Arduino.LOW, Arduino.LOW, Arduino.LOW, Arduino.LOW, Arduino.LOW };

void setup() {
 size(470, 200);
 
 println(Arduino.list());
 arduino = new Arduino(this, Arduino.list()[0], 57600);
 
 for (int i = 0; i <= 13; i++)
   arduino.pinMode(i, Arduino.OUTPUT);
}

void draw() {
 background(off);
 stroke(on);
 
 for (int i = 0; i <= 13; i++) {
   if (values[i] == Arduino.HIGH)
     fill(on);
   else
     fill(off);
     
   rect(420 - i * 30, 30, 20, 20);
 }
}

void mousePressed()
{
 int pin = (450 - mouseX) / 30;
 
 if (values[pin] == Arduino.LOW) {
   arduino.digitalWrite(pin, Arduino.HIGH);
   values[pin] = Arduino.HIGH;
 } else {
   arduino.digitalWrite(pin, Arduino.LOW);
   values[pin] = Arduino.LOW;
 }
}




please just change it so i get the desired effect, thanks and happy new years!
-big93

I can't speak for other people, but I personally don't like posts of this sort: "fix this, quick!". Probably that's why nobody answered!

The code you posted is an example included in the arduino-processing library, right? If so, try to get it to work before changing it. 'Cause if it doesn't work, something has not been correctly setup. There are many places where the bug could be:
Adruino: Does it have the "firmdata" firmware on it?
Arduino: is it connected to the computer?
Computer: Is the Arduino driver installed?
Computer: Nothing but processing is accessing the serial port? (e.g. no open serial monitor in the ArduinoIDE)
Processing: Did you install the Arduino-Library correctly?
Processing: Does Arduino.list() print out any Arduino?

If you have the example working, go and have a look at http://processing.org/reference/keyPressed_.html it's gonna be easy to change your example code to work with key press.

ah ok, i see. there is a missing curly bracket after your for-loop in setup.