Hi, I want to try my first processing program which read arduino serial value and display it. I copy and paste an example code from the interest http://arduinobasics.blogspot.com/2011/06/displaying-serial-data-from-arduino-uno.htmlbut it won't compile.
void setup() {
size(400,200);
myPort = new Serial(this, "COM13", 9600);
myPort.bufferUntil('\n');
font = createFont(PFont.list()[2],32);
textFont(font);
}
I changed the default COM to COM4 (my arduino serial port is COM4), the compiler highlighted "myPort = new Serial(this, "COM13", 9600);" and showed the below error messages, the strange thing is when I changed the COM to any other COM which my arduino is not using, the program compiled without error, I wonder what's wrong with it?
gnu.io.PortInUseException: Unknown Application
at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:467)
at processing.serial.Serial.(Unknown Source)
at processing.serial.Serial.(Unknown Source)
at sketch_sep18a.setup(sketch_sep18a.java:30)
at processing.core.PApplet.handleDraw(Unknown Source)
at processing.core.PApplet.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)
Exception in thread "Animation Thread" java.lang.RuntimeException: Error inside Serial.()
at processing.serial.Serial.errorMessage(Unknown Source)
at processing.serial.Serial.(Unknown Source)
at processing.serial.Serial.(Unknown Source)
at sketch_sep18a.setup(sketch_sep18a.java:30)
at processing.core.PApplet.handleDraw(Unknown Source)
at processing.core.PApplet.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)