I have just begun using Arduino (Duemilenive) and after a disasterous start in Ubuntu (sketch compiling and uploading problems) I now have the board doing its thing quite nicely under Windows 7.
However, when I run the "Graph" example no output screen appears to display the graph. Serial coms are OK as values corresponding to the potentiometer position on the test set-up are printed to the serial monitor accordingly.
Any explanation for this would be appreciated.
Also any links to other graphing software for this interface that might be around.
Pete
om goodness man I cant help u but i have the same problem and I am soooo frustrated! I hate graphs to begin with, but this is just getting to me!
are you running the "processing" program on the PC? That's what actually does the display.
Thanks for your input, Bill.
I am not well versed in c or c++ and new to the Arduino but i assumed that compiling and uploading the entire example file "Graph" as pasted below would generate both the serial coms return and also the graphic display processing. Is that assumption wrong? If so perhaps you could explain what I am missing here?
Cheers
Pete
*/
void setup() {
// initialize the serial communication:
Serial.begin(9600);
}
void loop() {
// send the value of analog input 0:
Serial.println(analogRead(0));
// wait a bit for the analog-to-digital converter
// to stabilize after the last reading:
delay(10);
}
/* Processing code for this example
// Graphing sketch
// This program takes ASCII-encoded strings
// from the serial port at 9600 baud and graphs them. It expects values in the
// range 0 to 1023, followed by a newline, or newline and carriage return
// Created 20 Apr 2005
// Updated 18 Jan 2008
// by Tom Igoe
import processing.serial.*;
Serial myPort; // The serial port
int xPos = 1; // horizontal position of the graph
void setup () {
// set the window size:
size(400, 300);
// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
// set inital background:
background(0);
}
void draw () {
// everything happens in the serialEvent()
}
void serialEvent (Serial myPort) {
// get the ASCII string:
String inString = myPort.readStringUntil('\n');
if (inString != null) {
// trim off any whitespace:
inString = trim(inString);
// convert to an int and map to the screen height:
float inByte = float(inString);
inByte = map(inByte, 0, 1023, 0, height);
// draw the line:
stroke(127,34,255);
line(xPos, height, xPos, height - inByte);
// at the edge of the screen, go back to the beginning:
if (xPos >= width) {
xPos = 0;
background(0);
}
else {
// increment the horizontal position:
xPos++;
}
}
}
*/
/* Max/MSP v5 patch for this example
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(etc - not enough room here for the rest :()
"Processing" as in http://processing.org/, it's a separate language and development system you have to download.
Anything between /* and */ will not be used by the Arduino. Make sure to delete those lines when you paste it into Processing.
Oh, and throw away everything for the Max/MSP unless you know what that is and have it.
Ahaa! - Thank-you -That has clarified things greatly!
After a little messing around I have finally a graph of input levels on My XP machine. [smiley=thumbsup.gif]
Still a muddle on both my Ubuntu and Windows 7 dual boot set-up but for unrelated reasons methinks.
I now suspect that there is no reason why I can't just use the graphing/integration program that I wrote in Liberty basic a few years back to read the serial port instead of "Processing"?
Can you see any problem with that?