import java.awt.*;
import java.awt.event.*;
import xyzzy.hardware.*;

class Thermo
{
    static volatile boolean keepGoing = true;

    public static void main ( String[] argv )
    {
	final Thread mainThread = Thread.currentThread();

	final Frame fr = new Frame();
	fr.addWindowListener( new WindowAdapter () {
		public void windowClosing ( final WindowEvent ev )
		{
		    ev.getWindow().dispose();
		}
		public void windowClosed ( final WindowEvent ev )
		{
		    keepGoing = false;
		}
	    });
	final ThermometerGraph tg = new ThermometerGraph();
	tg.setMaximum( 40 );
	tg.setMinimum(  0 );
	tg.setValue( 0 );
	fr.add( tg );
	fr.setBackground( SystemColor.control );
	fr.pack();
	fr.show();

	try {
	    final UsbIo usbio = UsbIo.getInstance();
	    try {
		final UsbIo.Device[] devices = usbio.findDevices();

		/* At this moment, we can handle only one USBIO.  */
		if ( devices.length != 1 ) {
		    if ( devices.length == 0 ) {
			System.err.println( "no USBIO is found" );
		    } else {
			System.err.println( "two or more USBIO are found" );
		    }
		    return;
		}

		/* Configure the USBIO as an SPI controller:
		   Port#1/bit3 is clock, Port#0/bit7 is data,
		   Port#0/bit5 is select (active high).  Other pins
		   are assumed to be unconnected.  */
		final UsbSpiDevice spi
		    = new UsbSpiDevice( devices[0], 3, 7, 0x20, 0x00, 0x20 );
		final Ds1620 ds = new Ds1620( spi );
		ds.open();
		try {
		    ds.setOneShot( true );
		    while ( keepGoing ) {
			tg.setValue( ds.getHiResTemperature() );
			Thread.sleep( 5000 );
		    }
		} finally {
		    ds.close();
		}
	    } finally {
		usbio.releaseDevices();
	    }
	} catch ( Throwable e ) {
	    System.err.println( "Error/Exception: " + e.toString() );
	    e.printStackTrace();
	} finally {
	    System.exit( 0 );
	}
    }
}