git.gag.com Git - fw/altos/blob - altosui/AltosSerial.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 /*
  19  * Deal with TeleDongle on a serial port
  20  */
  21
  22 package altosui;
  23
  24 import java.lang.*;
  25 import java.io.*;
  26 import java.util.concurrent.*;
  27 import java.util.*;
  28 import java.text.*;
  29 import java.awt.*;
  30 import java.awt.event.*;
  31 import javax.swing.*;
  32 import javax.swing.filechooser.FileNameExtensionFilter;
  33 import javax.swing.table.*;
  34 import org.altusmetrum.AltosLib.*;
  35
  36 import libaltosJNI.*;
  37
  38 /*
  39  * This class reads from the serial port and places each received
  40  * line in a queue. Dealing with that queue is left up to other
  41  * threads.
  42  */
  43
  44 public class AltosSerial extends AltosLink implements Runnable {
  45
  46         static java.util.List<String> devices_opened = Collections.synchronizedList(new LinkedList<String>());
  47
  48         AltosDevice device;
  49         SWIGTYPE_p_altos_file altos;
  50         Thread input_thread;
  51         Frame frame;
  52
  53         public void run () {
  54                 int c;
  55                 byte[] line_bytes = null;
  56                 int line_count = 0;
  57
  58                 try {
  59                         for (;;) {
  60                                 c = libaltos.altos_getchar(altos, 0);
  61                                 if (Thread.interrupted())
  62                                         break;
  63                                 if (c == libaltosConstants.LIBALTOS_ERROR) {
  64                                         add_telem (new AltosLine());
  65                                         add_reply (new AltosLine());
  66                                         break;
  67                                 }
  68                                 if (c == libaltosConstants.LIBALTOS_TIMEOUT)
  69                                         continue;
  70                                 if (c == '\r')
  71                                         continue;
  72                                 synchronized(this) {
  73                                         if (c == '\n') {
  74                                                 if (line_count != 0) {
  75                                                         add_bytes(line_bytes, line_count);
  76                                                         line_count = 0;
  77                                                 }
  78                                         } else {
  79                                                 if (line_bytes == null) {
  80                                                         line_bytes = new byte[256];
  81                                                 } else if (line_count == line_bytes.length) {
  82                                                         byte[] new_line_bytes = new byte[line_count * 2];
  83                                                         System.arraycopy(line_bytes, 0, new_line_bytes, 0, line_count);
  84                                                         line_bytes = new_line_bytes;
  85                                                 }
  86                                                 line_bytes[line_count] = (byte) c;
  87                                                 line_count++;
  88                                         }
  89                                 }
  90                         }
  91                 } catch (InterruptedException e) {
  92                 }
  93         }
  94
  95         public void flush_output() {
  96                 super.flush_output();
  97                 if (altos != null) {
  98                         libaltos.altos_flush(altos);
  99                 }
 100         }
 101
 102         boolean         abort;
 103         JDialog         timeout_dialog;
 104         boolean timeout_started = false;
 105
 106         private void stop_timeout_dialog() {
 107                 if (timeout_started) {
 108                         timeout_started = false;
 109                         Runnable r = new Runnable() {
 110                                         public void run() {
 111                                                 timeout_dialog.setVisible(false);
 112                                         }
 113                                 };
 114                         SwingUtilities.invokeLater(r);
 115                 }
 116         }
 117
 118         private void start_timeout_dialog_internal() {
 119
 120                 Object[] options = { "Cancel" };
 121
 122                 JOptionPane     pane = new JOptionPane();
 123                 pane.setMessage(String.format("Connecting to %s, %7.3f MHz", device.toShortString(), frequency));
 124                 pane.setOptions(options);
 125                 pane.setInitialValue(null);
 126
 127                 timeout_dialog = pane.createDialog(frame, "Connecting...");
 128
 129                 timeout_dialog.setVisible(true);
 130
 131                 Object o = pane.getValue();
 132                 if (o == null)
 133                         return;
 134                 if (options[0].equals(o))
 135                         abort = true;
 136                 timeout_dialog.dispose();
 137                 timeout_dialog = null;
 138         }
 139
 140         private boolean check_timeout() {
 141                 if (!timeout_started && frame != null) {
 142                         if (!SwingUtilities.isEventDispatchThread()) {
 143                                 timeout_started = true;
 144                                 Runnable r = new Runnable() {
 145                                                 public void run() {
 146                                                         start_timeout_dialog_internal();
 147                                                 }
 148                                         };
 149                                 SwingUtilities.invokeLater(r);
 150                         }
 151                 }
 152                 return abort;
 153         }
 154
 155         public void flush_input() throws InterruptedException {
 156                 if (remote)
 157                         flush_input(500);
 158                 else
 159                         flush_input(100);
 160         }
 161
 162         int     in_reply;
 163
 164         public String get_reply(int timeout) throws InterruptedException {
 165                 boolean can_cancel = true;
 166                 String  reply = null;
 167
 168                 try {
 169                         ++in_reply;
 170
 171                         if (SwingUtilities.isEventDispatchThread()) {
 172                                 can_cancel = false;
 173                                 if (remote)
 174                                         System.out.printf("Uh-oh, reading remote serial device from swing thread\n");
 175                         }
 176                         flush_output();
 177                         if (remote && can_cancel) {
 178                                 timeout = 500;
 179                         }
 180                         abort = false;
 181                         timeout_started = false;
 182                         for (;;) {
 183                                 AltosLine line = reply_queue.poll(timeout, TimeUnit.MILLISECONDS);
 184                                 if (line != null) {
 185                                         stop_timeout_dialog();
 186                                         reply = line.line;
 187                                         break;
 188                                 }
 189                                 if (!remote || !can_cancel || check_timeout()) {
 190                                         reply = null;
 191                                         break;
 192                                 }
 193                         }
 194                 } finally {
 195                         --in_reply;
 196                 }
 197                 return reply;
 198         }
 199
 200         public void close() {
 201                 if (remote) {
 202                         try {
 203                                 stop_remote();
 204                         } catch (InterruptedException ie) {
 205                         }
 206                 }
 207                 if (in_reply != 0)
 208                         System.out.printf("Uh-oh. Closing active serial device\n");
 209
 210                 if (altos != null) {
 211                         libaltos.altos_close(altos);
 212                 }
 213                 if (input_thread != null) {
 214                         try {
 215                                 input_thread.interrupt();
 216                                 input_thread.join();
 217                         } catch (InterruptedException e) {
 218                         }
 219                         input_thread = null;
 220                 }
 221                 if (altos != null) {
 222                         libaltos.altos_free(altos);
 223                         altos = null;
 224                 }
 225                 synchronized (devices_opened) {
 226                         devices_opened.remove(device.getPath());
 227                 }
 228                 if (debug)
 229                         System.out.printf("Closing %s\n", device.getPath());
 230         }
 231
 232         private void putc(char c) {
 233                 if (altos != null)
 234                         libaltos.altos_putchar(altos, c);
 235         }
 236
 237         public void print(String data) {
 238                 for (int i = 0; i < data.length(); i++)
 239                         putc(data.charAt(i));
 240         }
 241
 242         private void open() throws FileNotFoundException, AltosSerialInUseException {
 243                 synchronized (devices_opened) {
 244                         if (devices_opened.contains(device.getPath()))
 245                                 throw new AltosSerialInUseException(device);
 246                         devices_opened.add(device.getPath());
 247                 }
 248                 altos = device.open();
 249                 if (altos == null) {
 250                         final String    message = device.getErrorString();
 251                         close();
 252                         throw new FileNotFoundException(String.format("%s (%s)",
 253                                                                       device.toShortString(), message));
 254                 }
 255                 if (debug)
 256                         System.out.printf("Open %s\n", device.getPath());
 257                 input_thread = new Thread(this);
 258                 input_thread.start();
 259                 print("~\nE 0\n");
 260                 set_monitor(false);
 261                 flush_output();
 262         }
 263
 264         public void set_frame(Frame in_frame) {
 265                 frame = in_frame;
 266         }
 267
 268         public AltosSerial(AltosDevice in_device) throws FileNotFoundException, AltosSerialInUseException {
 269                 device = in_device;
 270                 frame = null;
 271                 serial = device.getSerial();
 272                 name = device.toShortString();
 273                 open();
 274         }
 275 }