161 lines
6.3 KiB
Java
161 lines
6.3 KiB
Java
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* Copyright (c) 2010, University of Luebeck, Germany.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* \file
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* ViewRSSI java application
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* \author
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* Joakim Eriksson <joakime@sics.se>
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* Carlo Alberto Boano <cboano@iti.uni-luebeck.de>
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*/
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import javax.swing.*;
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import java.awt.*;
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import java.io.*;
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public class ViewRSSI extends JPanel{
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// Constants
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public static int TOTAL = 86; // Number of channel of 1 MHz sampled
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public static int DECREASE_RSSI = 2; // How many dBm the grey RSSI falls each sample
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public static int RSSI_MAX_VALUE = 100; // Maximum value obtainable from RSSI readings of CC2420.
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public static int MARGIN_BOTTOM = 20; // Margin from the bottom
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public static int MARGIN_RIGHT = 75; // Margin from the right
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public static int MARGIN_TOP = 12; // Margin from the top
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public static int INTERFERED_CHANNEL = 24; // Interfered channel
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public InputStream inputstr;
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private int[] rssi = new int[TOTAL]; // Array of current Noise floor values (black line)
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private int[] rssiMax = new int[TOTAL]; // Array with past Noise floor values (grey line)
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public ViewRSSI() {
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}
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public void paint(Graphics g) {
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Graphics2D g2 = (Graphics2D) g;
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int h = getHeight();
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int w = getWidth();
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double factor = (h - (MARGIN_BOTTOM*1.0)) / RSSI_MAX_VALUE;
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double sSpacing = (w - MARGIN_RIGHT) / (TOTAL*1.0);
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int sWidth = (int) (sSpacing - 1);
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if (sWidth == 0) sWidth = 1;
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// Set white background in the plot
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g.setColor(Color.white);
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g.fillRect(0, 0, w, h);
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// Gradient example (ytics background)
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GradientPaint greytowhite = new GradientPaint(w-MARGIN_RIGHT,0,Color.WHITE,w, 0,Color.lightGray, false);
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g2.setPaint(greytowhite);
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g2.fillRect(w-MARGIN_RIGHT, 0, w, h);
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// Draw the light grey channels from 11 to 26
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double xpos = 10;
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for(int i=4;i<TOTAL-4;i++){
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if (i==4+5*(INTERFERED_CHANNEL-11)) g.setColor(Color.cyan);
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else g.setColor(Color.lightGray);
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g.fillRect((int) (xpos+i*sSpacing), 0, (int) (sSpacing*3), h-MARGIN_BOTTOM);
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i = i + 4;
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g.setColor(Color.blue);
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g.drawString(String.valueOf(((i-8)/5)+11), (int) (xpos+(i-4)*sSpacing), MARGIN_TOP);
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}
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g.drawString(String.valueOf("Channel"), (int) (w-MARGIN_RIGHT+20), MARGIN_TOP);
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// Write the y-axis with dBm
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int base_dBm = -100; // The bottom corresponds to -100 dBm
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int ytics = 10; // How many tics on the y-axis
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for(int i=-ytics;i<=0;i++){
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g.setColor(Color.red);
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g.drawString(String.valueOf(((ytics+i)*(base_dBm/ytics))+"dBm"), (int) (w-MARGIN_RIGHT+20), (int) (h+i*(h/ytics))-MARGIN_BOTTOM);
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// Dashed line for the ytics
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final float dash1[] = {10.0f};
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final BasicStroke dashed = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, dash1, 0.0f);
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g2.setStroke(dashed);
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g2.drawLine(0, (int) (h+i*(h/ytics))-MARGIN_BOTTOM, (int) (w-MARGIN_RIGHT+7), (int) (h+i*(h/ytics))-MARGIN_BOTTOM);
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}
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// Write the x-axis with MHz
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g.setColor(Color.blue);
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int start_x_axis = 4;
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g.drawString(String.valueOf(2400+"MHz"), (int) xpos, (int) h-start_x_axis);
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g.drawString(String.valueOf(2442.5+"MHz"), (w-119)/2, (int) h-start_x_axis);
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g.drawString(String.valueOf(2485+"MHz"), w-119, (int) h-start_x_axis);
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// Draw the old RSSI in each MHz channel (grey)
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g.setColor(Color.gray);
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double xposition = xpos;
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for (int i = 0, n = rssi.length; i < n; i++) {
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int rssi = (int) (rssiMax[i] * factor);
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g.fillRect((int) xposition, h - MARGIN_BOTTOM - rssi, sWidth, rssi + 1);
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xposition += sSpacing;
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}
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// Draw the current RSSI in each MHz channel (black)
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g.setColor(Color.black);
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xposition = xpos;
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for (int i = 0, n = rssi.length; i < n; i++) {
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int rssiVal = (int) (rssi[i] * factor);
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g.fillRect((int) xposition, h - MARGIN_BOTTOM - rssiVal, sWidth, rssiVal + 1);
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xposition += sSpacing;
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}
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}
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public void handleInput() throws IOException {
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BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
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while(true) {
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String line = reader.readLine();
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if (line.startsWith("RSSI:")) {
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try {
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String[] parts = line.substring(5).split(" ");
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for (int i = 0, n = parts.length; i < n; i++) {
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rssi[i] = Integer.parseInt(parts[i]); // An RSSI=0 corresponds to -100 dBm, an RSSI=100 corresponds to 0 dBm
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if (rssi[i] > rssiMax[i]) rssiMax[i] = rssi[i];
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else if (rssiMax[i] > 0) rssiMax[i] = rssiMax[i] - DECREASE_RSSI;
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}
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} catch (Exception e) {
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e.printStackTrace(); /* Report error, but do not fail... */
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}
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repaint();
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}
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}
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}
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public static void main(String[] args) throws IOException {
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JFrame win = new JFrame("RSSI Viewer");
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ViewRSSI panel;
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win.setBounds(10, 10, 590, 590);
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win.getContentPane().add(panel = new ViewRSSI());
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win.setVisible(true);
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win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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panel.handleInput();
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}
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}
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