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Topic: From processing to arduino (Read 1 time) previous topic - next topic

pedroply

And how do I do that??
sorry for being very annoying.

Arrch

#16
Mar 15, 2013, 08:50 pm Last Edit: Mar 15, 2013, 08:59 pm by Arrch Reason: 1

And how do I do that??


How do you decide which encoding scheme to use? Coin flip?

I personally prefer ASCII over binary because it is easier to keep in sync.

HazardsMind

How you want to send the data, is your choice.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

pedroply

I am sending int like arduinoPort.write(pos); which is an int, how do I combine that with the strtok() command?

Arrch


I am sending int like arduinoPort.write(pos); which is an int, how do I combine that with the strtok() command?


You don't. You read in the two bytes individually, and pack them into an int. strok() only works if you decide to use an ASCII encoding scheme.

pedroply



pedroply

#22
Mar 15, 2013, 09:31 pm Last Edit: Mar 15, 2013, 09:34 pm by pedroply Reason: 1
Thanks, rely enjoyed the second link but when I put in processing "z = (int)(word(pos, posc));" it says the function does not exists  

Arrch


Thanks, rely enjoyed the second link but when I put in "z = (int)(word(pos, posc));" it says the function does not exists 


What function doesn't exist? If you're trying to compile some code, and you get an error, not posting the entire code and the entire error is less than unhelpful.

pedroply

Here is the code:
Code: [Select]
import processing.serial.*;
import oscP5.*;
import netP5.*;


Serial arduinoPort;
OscP5 oscP5;

float redAmount = 0.0f;
float greenAmount = 0.0f;
float blueAmount = 0.0f;
byte pos = 0;
byte posc = 0;
int z;


void setup(){
  size(320, 480);
  background(0);
  oscP5 = new OscP5(this, 8000);
  arduinoPort = new Serial(this, "COM3", 9600);
 
 
}


void draw(){
  background(redAmount, greenAmount, blueAmount);
 
  fill(0);
  //red rect
  stroke(255,0,0);
  rect(34,39,67,255);
  fill(50,40,40);
  rect(34,39+255,67,-redAmount);
 
  //green rect
  fill(0);
  stroke(0,255,0);
  rect(124,39,67,255);
  fill(40,50,40);
  rect(124,39+255,67,-greenAmount);
 
  //blue rect
  fill(0);
  stroke(0,0,255);
  rect(216,39,67,255);
  fill(40,40,50);
  rect(216,39+255,67,-blueAmount);
 
 
 
 
}

void oscEvent(OscMessage theOscMessage){
  String addr = theOscMessage.addrPattern();
  float val = theOscMessage.get(0).floatValue();
 
  if(addr.equals("/1/red")){ redAmount = val;}
  if(addr.equals("/1/green")){ greenAmount = val;}
  if(addr.equals("/1/blue")){ blueAmount = val;}
  pos = byte(blueAmount);
  posc = byte(redAmount);
  z = (int)(word(pos, posc));
  arduinoPort.write(z);

 
 
}



and here is the error:
the fuction word(byte, byte) does not exist.

Arrch

#25
Mar 15, 2013, 09:52 pm Last Edit: Mar 15, 2013, 09:54 pm by Arrch Reason: 1
That's Processing. The example in the linked thread was a general idea about how to work with bytes and ints with the Arduino. You'll notice a couple posts down, there is a better, more portable way to do it.

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