/*
* Copyright (c) 2005-2006 Rincon Research Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
* - Neither the name of the Rincon Research Corporation nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* RINCON RESEARCH OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE
*/
/**
* Java class to display RSSI readings returned from a mote running the
* RssiToSerial application.
*
* @author Jared Hill
*/
import net.tinyos.message.Message;
import net.tinyos.message.MessageListener;
import net.tinyos.message.MoteIF;
import net.tinyos.message.SerialPacket;
import net.tinyos.packet.BuildSource;
import net.tinyos.packet.PhoenixSource;
import net.tinyos.util.PrintStreamMessenger;
public class SpecAnalyzer implements MessageListener {
/** Communication with the mote */
private MoteIF mote;
/** Broadcast Address */
public static final short TOS_BCAST_ADDR = (short) 0xffff;
/** The message from the mote */
private RssiSerialMsg rssiMsg;
/** The total number of characters written last time */
private int lastCharsWritten = 0;
/** The maximum size of the bar on the command line, in characters */
private static final int MAX_CHARACTERS = 50;
/**
* Constructor
*
* @param argv
*/
public SpecAnalyzer(MoteIF mif) {
try {
System.out.println("Connecting to serial forwarder...");
mote = mif;
mote.registerListener(new RssiSerialMsg(), this);
} catch (Exception e) {
System.err.println("Couldn't contact serial forwarder");
}
}
/**
* Received a message from the mote
*/
synchronized public void messageReceived(int dest,
Message m) {
rssiMsg = (RssiSerialMsg) m;
updateSpectrum(rssiMsg.get_rssiLargestValue(), rssiMsg.get_rssiAvgValue());
}
/**
* Overwrites the current command line prompt with blank space
*
*/
void clearSpectrum() {
for(int i = 0; i < lastCharsWritten; i++) {
System.out.print('\b');
}
}
/**
* Prints the magnitude of the spectrum to stdout. Specifically, it prints
* (largest - average) "+" signs to stdout.
*
* @param largest
* the largest rssi value taken during the sample period
* @param avg
* the average rssi value taken during the sample period
*/
void updateSpectrum(int largest, int avg) {
clearSpectrum();
String bar = "[";
int size = (int) ((float) largest * (float) ((float) MAX_CHARACTERS / (float) (255)));
for(int i = 0; i < size && i < MAX_CHARACTERS; i++) {
bar += "+";
}
for(int i = 0; i < (MAX_CHARACTERS - size); i++) {
bar += " ";
}
bar += "]";
lastCharsWritten = bar.length();
System.out.print(bar);
}
private static void usage() {
System.err.println("usage: SpecAnalyzer [-comm <source>]");
}
/**
* Main Method
*
* @param argv
*/
public static void main(String[] args) {
String source = null;
if (args.length == 2) {
if (!args[0].equals("-comm")) {
usage();
System.exit(1);
}
source = args[1];
} else if (args.length != 0) {
usage();
System.exit(1);
}
PhoenixSource phoenix;
if (source == null) {
phoenix = BuildSource.makePhoenix(PrintStreamMessenger.err);
} else {
phoenix = BuildSource.makePhoenix(source, PrintStreamMessenger.err);
}
MoteIF mif = new MoteIF(phoenix);
new SpecAnalyzer(mif);
}
}