contiki/examples/rssi-scanner/ViewRSSI.java

162 lines
6.3 KiB
Java

/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* Copyright (c) 2010, University of Luebeck, Germany.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE OR 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.
*/
/**
* \file
* ViewRSSI java application
* \author
* Joakim Eriksson <joakime@sics.se>
* Carlo Alberto Boano <cboano@iti.uni-luebeck.de>
*/
import javax.swing.*;
import java.awt.*;
import java.io.*;
public class ViewRSSI extends JPanel{
// Constants
public static int TOTAL = 86; // Number of channel of 1 MHz sampled
public static int DECREASE_RSSI = 2; // How many dBm the grey RSSI falls each sample
public static int RSSI_MAX_VALUE = 100; // Maximum value obtainable from RSSI readings of CC2420.
public static int MARGIN_BOTTOM = 20; // Margin from the bottom
public static int MARGIN_RIGHT = 75; // Margin from the right
public static int MARGIN_TOP = 12; // Margin from the top
public static int INTERFERED_CHANNEL = 24; // Interfered channel
public InputStream inputstr;
private int[] rssi = new int[TOTAL]; // Array of current Noise floor values (black line)
private int[] rssiMax = new int[TOTAL]; // Array with past Noise floor values (grey line)
public ViewRSSI() {
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
int h = getHeight();
int w = getWidth();
double factor = (h - (MARGIN_BOTTOM*1.0)) / RSSI_MAX_VALUE;
double sSpacing = (w - MARGIN_RIGHT) / (TOTAL*1.0);
int sWidth = (int) (sSpacing - 1);
if (sWidth == 0) sWidth = 1;
// Set white background in the plot
g.setColor(Color.white);
g.fillRect(0, 0, w, h);
// Gradient example (ytics background)
GradientPaint greytowhite = new GradientPaint(w-MARGIN_RIGHT,0,Color.WHITE,w, 0,Color.lightGray, false);
g2.setPaint(greytowhite);
g2.fillRect(w-MARGIN_RIGHT, 0, w, h);
// Draw the light grey channels from 11 to 26
double xpos = 10;
for(int i=4;i<TOTAL-4;i++){
if (i==4+5*(INTERFERED_CHANNEL-11)) g.setColor(Color.cyan);
else g.setColor(Color.lightGray);
g.fillRect((int) (xpos+i*sSpacing), 0, (int) (sSpacing*3), h-MARGIN_BOTTOM);
i = i + 4;
g.setColor(Color.blue);
g.drawString(String.valueOf(((i-8)/5)+11), (int) (xpos+(i-4)*sSpacing), MARGIN_TOP);
}
g.drawString(String.valueOf("Channel"), (int) (w-MARGIN_RIGHT+20), MARGIN_TOP);
// Write the y-axis with dBm
int base_dBm = -100; // The bottom corresponds to -100 dBm
int ytics = 10; // How many tics on the y-axis
for(int i=-ytics;i<=0;i++){
g.setColor(Color.red);
g.drawString(String.valueOf(((ytics+i)*(base_dBm/ytics))+"dBm"), (int) (w-MARGIN_RIGHT+20), (int) (h+i*(h/ytics))-MARGIN_BOTTOM);
// Dashed line for the ytics
final float dash1[] = {10.0f};
final BasicStroke dashed = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, dash1, 0.0f);
g2.setStroke(dashed);
g2.drawLine(0, (int) (h+i*(h/ytics))-MARGIN_BOTTOM, (int) (w-MARGIN_RIGHT+7), (int) (h+i*(h/ytics))-MARGIN_BOTTOM);
}
// Write the x-axis with MHz
g.setColor(Color.blue);
int start_x_axis = 4;
g.drawString(String.valueOf(2400+"MHz"), (int) xpos, (int) h-start_x_axis);
g.drawString(String.valueOf(2442.5+"MHz"), (w-119)/2, (int) h-start_x_axis);
g.drawString(String.valueOf(2485+"MHz"), w-119, (int) h-start_x_axis);
// Draw the old RSSI in each MHz channel (grey)
g.setColor(Color.gray);
double xposition = xpos;
for (int i = 0, n = rssi.length; i < n; i++) {
int rssi = (int) (rssiMax[i] * factor);
g.fillRect((int) xposition, h - MARGIN_BOTTOM - rssi, sWidth, rssi + 1);
xposition += sSpacing;
}
// Draw the current RSSI in each MHz channel (black)
g.setColor(Color.black);
xposition = xpos;
for (int i = 0, n = rssi.length; i < n; i++) {
int rssiVal = (int) (rssi[i] * factor);
g.fillRect((int) xposition, h - MARGIN_BOTTOM - rssiVal, sWidth, rssiVal + 1);
xposition += sSpacing;
}
}
public void handleInput() throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while(true) {
String line = reader.readLine();
if (line.startsWith("RSSI:")) {
try {
String[] parts = line.substring(5).split(" ");
for (int i = 0, n = parts.length; i < n; i++) {
rssi[i] = Integer.parseInt(parts[i]); // An RSSI=0 corresponds to -100 dBm, an RSSI=100 corresponds to 0 dBm
if (rssi[i] > rssiMax[i]) rssiMax[i] = rssi[i];
else if (rssiMax[i] > 0) rssiMax[i] = rssiMax[i] - DECREASE_RSSI;
}
} catch (Exception e) {
e.printStackTrace(); /* Report error, but do not fail... */
}
repaint();
}
}
}
public static void main(String[] args) throws IOException {
JFrame win = new JFrame("RSSI Viewer");
ViewRSSI panel;
win.setBounds(10, 10, 590, 590);
win.getContentPane().add(panel = new ViewRSSI());
win.setVisible(true);
win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel.handleInput();
}
}