87 lines
2.2 KiB
Java
87 lines
2.2 KiB
Java
/**
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* RSSI Viewer - view RSSI values of 802.15.4 channels
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* ---------------------------------------------------
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* Note: run the rssi-scanner on a Sky or sentilla node connected to USB
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* then start with
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* make login | java ViewRSSI
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*
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* Created: Fri Apr 24 00:40:01 2009, Joakim Eriksson
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*
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* @author Joakim Eriksson, SICS
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* @version 1.0
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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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private int[] rssi = new int[80];
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private int[] rssiMax = new int[80];
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/* this is the max value of the RSSI from the cc2420 */
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private static final int RSSI_MAX_VALUE = 200;
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public ViewRSSI() {
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}
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public void paint(Graphics g) {
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int h = getHeight();
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int w = getWidth();
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g.clearRect(0, 0, 300, h);
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double factor = (h - 20.0) / RSSI_MAX_VALUE;
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double sSpacing = (w - 15 ) / 80.0;
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int sWidth = (int) (sSpacing - 1);
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if (sWidth == 0) sWidth = 1;
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g.setColor(Color.gray);
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double xpos = 10;
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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) xpos, h - 20 - rssi,
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sWidth, rssi + 1);
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xpos += sSpacing;
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}
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g.setColor(Color.black);
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xpos = 10;
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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) xpos, h - 20 - rssiVal,
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sWidth, rssiVal + 1);
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xpos += sSpacing;
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}
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}
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private void handleInput() throws IOException {
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BufferedReader reader =
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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.split(" ");
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for (int i = 1, n = parts.length; i < n; i++) {
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rssi[i] = 3 * Integer.parseInt(parts[i]);
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if (rssi[i] > rssiMax[i]) rssiMax[i] = rssi[i];
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else if (rssiMax[i] > 0) rssiMax[i]--;
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}
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} catch (Exception e) {
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/* report but do not fail... */
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e.printStackTrace();
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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, 300, 300);
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win.getContentPane().add(panel = new ViewRSSI());
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win.setVisible(true);
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panel.handleInput();
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}
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}
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