Hey all, I am trying to read integers out of the serial port (which re being written by an arduino).  Essentially, there is a lag time of nearly ten seconds between when the arduino writes to the serial port and the Processing serial library reads and the data and it is displayed.  My code for reading the port is as follows:

Code:

	/**
	 * Get the x and y values recorded by the serial port
	 */
	private void receiveData() {
		// read the value from the serial port
		xValue = 0;
		yValue = 0;
		
		if(port.available() > 0) {
			bufferedValue = port.read();
	
			while(bufferedValue != SEPARATOR) {
				// converts the Serial input, which is a stream of ascii characters, to integers
				// Shift the the current digits left one place
				xValue*= 10;
				// add the next value in the stream
				xValue += (bufferedValue - 48);
				

				bufferedValue = port.read();
			}
			
			bufferedValue = port.read();
		
			while(bufferedValue != SEPARATOR) {
				// converts the Serial input, which is a stream of ascii characters, to integers
				// Shift the the current digits left one place
				yValue*= 10;
				// add the next value in the stream
				yValue += (bufferedValue - 48);
				
				bufferedValue = port.read();
			}
		}
	}
	
}
 

The recieve data method reads the numerical characters and converts them to integers.  I simply cannot figure out why this is so slow.  Would running the receiveData() method in its on thread improve the situation at all.

p.s. I am using the processing Libraries in eclipse.

Thanks,
Andy

One thought that may not cause a delay but read values incorrectly is the number of calls to read().
But then, I am guessing.

I'm not sure when or how often receiveData() is called.
And if you changed your code...

Is it possible to get a runnable example?
Both Processing and Arduino?