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   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         String line;
  52         byte[] line_bytes;
  53         int line_count;
  54         Frame frame;
  55
  56         public void run () {
  57                 int c;
  58                 byte[] line_bytes = null;
  59                 int line_count = 0;
  60
  61                 try {
  62                         for (;;) {
  63                                 c = libaltos.altos_getchar(altos, 0);
  64                                 if (Thread.interrupted())
  65                                         break;
  66                                 if (c == libaltosConstants.LIBALTOS_ERROR) {
  67                                         add_telem (new AltosLine());
  68                                         add_reply (new AltosLine());
  69                                         break;
  70                                 }
  71                                 if (c == libaltosConstants.LIBALTOS_TIMEOUT)
  72                                         continue;
  73                                 if (c == '\r')
  74                                         continue;
  75                                 synchronized(this) {
  76                                         if (c == '\n') {
  77                                                 if (line_count != 0) {
  78                                                         add_bytes(line_bytes, line_count);
  79                                                         line_count = 0;
  80                                                 }
  81                                         } else {
  82                                                 if (line_bytes == null) {
  83                                                         line_bytes = new byte[256];
  84                                                 } else if (line_count == line_bytes.length) {
  85                                                         byte[] new_line_bytes = new byte[line_count * 2];
  86                                                         System.arraycopy(line_bytes, 0, new_line_bytes, 0, line_count);
  87                                                         line_bytes = new_line_bytes;
  88                                                 }
  89                                                 line_bytes[line_count] = (byte) c;
  90                                                 line_count++;
  91                                         }
  92                                 }
  93                         }
  94                 } catch (InterruptedException e) {
  95                 }
  96         }
  97
  98         public void flush_output() {
  99                 super.flush_output();
 100                 if (altos != null) {
 101                         libaltos.altos_flush(altos);
 102                 }
 103         }
 104
 105         boolean         abort;
 106         JDialog         timeout_dialog;
 107         boolean timeout_started = false;
 108
 109         private void stop_timeout_dialog() {
 110                 if (timeout_started) {
 111                         timeout_started = false;
 112                         Runnable r = new Runnable() {
 113                                         public void run() {
 114                                                 timeout_dialog.setVisible(false);
 115                                         }
 116                                 };
 117                         SwingUtilities.invokeLater(r);
 118                 }
 119         }
 120
 121         private void start_timeout_dialog_internal() {
 122
 123                 Object[] options = { "Cancel" };
 124
 125                 JOptionPane     pane = new JOptionPane();
 126                 pane.setMessage(String.format("Connecting to %s, %7.3f MHz", device.toShortString(), frequency));
 127                 pane.setOptions(options);
 128                 pane.setInitialValue(null);
 129
 130                 timeout_dialog = pane.createDialog(frame, "Connecting...");
 131
 132                 timeout_dialog.setVisible(true);
 133
 134                 Object o = pane.getValue();
 135                 if (o == null)
 136                         return;
 137                 if (options[0].equals(o))
 138                         abort = true;
 139                 timeout_dialog.dispose();
 140                 timeout_dialog = null;
 141         }
 142
 143         private boolean check_timeout() {
 144                 if (!timeout_started && frame != null) {
 145                         if (!SwingUtilities.isEventDispatchThread()) {
 146                                 timeout_started = true;
 147                                 Runnable r = new Runnable() {
 148                                                 public void run() {
 149                                                         start_timeout_dialog_internal();
 150                                                 }
 151                                         };
 152                                 SwingUtilities.invokeLater(r);
 153                         }
 154                 }
 155                 return abort;
 156         }
 157
 158         public void flush_input() throws InterruptedException {
 159                 if (remote)
 160                         flush_input(500);
 161                 else
 162                         flush_input(100);
 163         }
 164
 165         int     in_reply;
 166
 167         public String get_reply(int timeout) throws InterruptedException {
 168                 boolean can_cancel = true;
 169                 String  reply = null;
 170
 171                 try {
 172                         ++in_reply;
 173
 174                         if (SwingUtilities.isEventDispatchThread()) {
 175                                 can_cancel = false;
 176                                 if (remote)
 177                                         System.out.printf("Uh-oh, reading remote serial device from swing thread\n");
 178                         }
 179                         flush_output();
 180                         if (remote && can_cancel) {
 181                                 timeout = 500;
 182                         }
 183                         abort = false;
 184                         timeout_started = false;
 185                         for (;;) {
 186                                 AltosLine line = reply_queue.poll(timeout, TimeUnit.MILLISECONDS);
 187                                 if (line != null) {
 188                                         stop_timeout_dialog();
 189                                         reply = line.line;
 190                                         break;
 191                                 }
 192                                 if (!remote || !can_cancel || check_timeout()) {
 193                                         reply = null;
 194                                         break;
 195                                 }
 196                         }
 197                 } finally {
 198                         --in_reply;
 199                 }
 200                 return reply;
 201         }
 202
 203         public void close() {
 204                 if (remote) {
 205                         try {
 206                                 stop_remote();
 207                         } catch (InterruptedException ie) {
 208                         }
 209                 }
 210                 if (in_reply != 0)
 211                         System.out.printf("Uh-oh. Closing active serial device\n");
 212
 213                 if (altos != null) {
 214                         libaltos.altos_close(altos);
 215                 }
 216                 if (input_thread != null) {
 217                         try {
 218                                 input_thread.interrupt();
 219                                 input_thread.join();
 220                         } catch (InterruptedException e) {
 221                         }
 222                         input_thread = null;
 223                 }
 224                 if (altos != null) {
 225                         libaltos.altos_free(altos);
 226                         altos = null;
 227                 }
 228                 synchronized (devices_opened) {
 229                         devices_opened.remove(device.getPath());
 230                 }
 231                 if (debug)
 232                         System.out.printf("Closing %s\n", device.getPath());
 233         }
 234
 235         private void putc(char c) {
 236                 if (altos != null)
 237                         libaltos.altos_putchar(altos, c);
 238         }
 239
 240         public void print(String data) {
 241                 for (int i = 0; i < data.length(); i++)
 242                         putc(data.charAt(i));
 243         }
 244
 245         private void open() throws FileNotFoundException, AltosSerialInUseException {
 246                 synchronized (devices_opened) {
 247                         if (devices_opened.contains(device.getPath()))
 248                                 throw new AltosSerialInUseException(device);
 249                         devices_opened.add(device.getPath());
 250                 }
 251                 altos = device.open();
 252                 if (altos == null) {
 253                         final String    message = device.getErrorString();
 254                         close();
 255                         throw new FileNotFoundException(String.format("%s (%s)",
 256                                                                       device.toShortString(), message));
 257                 }
 258                 if (debug)
 259                         System.out.printf("Open %s\n", device.getPath());
 260                 input_thread = new Thread(this);
 261                 input_thread.start();
 262                 print("~\nE 0\n");
 263                 set_monitor(false);
 264                 flush_output();
 265         }
 266
 267         public void set_frame(Frame in_frame) {
 268                 frame = in_frame;
 269         }
 270
 271         public AltosSerial(AltosDevice in_device) throws FileNotFoundException, AltosSerialInUseException {
 272                 device = in_device;
 273                 frame = null;
 274                 serial = device.getSerial();
 275                 name = device.toShortString();
 276                 open();
 277         }
 278 }