git.gag.com Git - fw/altos/blob - ao-tools/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.LinkedBlockingQueue;
  27 import java.util.LinkedList;
  28 import java.util.Iterator;
  29 import altosui.AltosSerialMonitor;
  30 import libaltosJNI.libaltos;
  31 import libaltosJNI.altos_device;
  32 import libaltosJNI.SWIGTYPE_p_altos_file;
  33 import libaltosJNI.SWIGTYPE_p_altos_list;
  34
  35 /*
  36  * This class reads from the serial port and places each received
  37  * line in a queue. Dealing with that queue is left up to other
  38  * threads.
  39  */
  40
  41 public class AltosSerial implements Runnable {
  42
  43         SWIGTYPE_p_altos_file altos;
  44         LinkedList<LinkedBlockingQueue<String>> monitors;
  45         LinkedBlockingQueue<String> reply_queue;
  46         Thread input_thread;
  47         String line;
  48         byte[] line_bytes;
  49         int line_count;
  50
  51         public void run () {
  52                 int c;
  53
  54                 try {
  55                         for (;;) {
  56                                 c = libaltos.altos_getchar(altos, 0);
  57                                 if (Thread.interrupted())
  58                                         break;
  59                                 if (c == -1)
  60                                         continue;
  61                                 if (c == '\r')
  62                                         continue;
  63                                 synchronized(this) {
  64                                         if (c == '\n') {
  65                                                 if (line_count != 0) {
  66                                                         try {
  67                                                                 line = new String(line_bytes, 0, line_count, "UTF-8");
  68                                                         } catch (UnsupportedEncodingException ue) {
  69                                                                 line = "";
  70                                                                 for (int i = 0; i < line_count; i++)
  71                                                                         line = line + line_bytes[i];
  72                                                         }
  73                                                         if (line.startsWith("VERSION")) {
  74                                                                 for (int e = 0; e < monitors.size(); e++) {
  75                                                                         LinkedBlockingQueue<String> q = monitors.get(e);
  76                                                                         q.put(line);
  77                                                                 }
  78                                                         } else {
  79 //                                                              System.out.printf("GOT: %s\n", line);
  80                                                                 reply_queue.put(line);
  81                                                         }
  82                                                         line_count = 0;
  83                                                         line = "";
  84                                                 }
  85                                         } else {
  86                                                 if (line_bytes == null) {
  87                                                         line_bytes = new byte[256];
  88                                                 } else if (line_count == line_bytes.length) {
  89                                                         byte[] new_line_bytes = new byte[line_count * 2];
  90                                                         System.arraycopy(line_bytes, 0, new_line_bytes, 0, line_count);
  91                                                         line_bytes = new_line_bytes;
  92                                                 }
  93                                                 line_bytes[line_count] = (byte) c;
  94                                                 line_count++;
  95                                         }
  96                                 }
  97                         }
  98                 } catch (InterruptedException e) {
  99                 }
 100         }
 101
 102         public void flush_reply() {
 103                 libaltos.altos_flush(altos);
 104                 try {
 105                         Thread.sleep(100);
 106                 } catch (InterruptedException ie) {
 107                 }
 108                 reply_queue.clear();
 109         }
 110
 111         public String get_reply() throws InterruptedException {
 112                 libaltos.altos_flush(altos);
 113                 String line = reply_queue.take();
 114                 return line;
 115         }
 116
 117         public void add_monitor(LinkedBlockingQueue<String> q) {
 118                 monitors.add(q);
 119         }
 120
 121         public void remove_monitor(LinkedBlockingQueue<String> q) {
 122                 monitors.remove(q);
 123         }
 124
 125         public void flush () {
 126                 synchronized(this) {
 127                         if (!"VERSION".startsWith(line) && !line.startsWith("VERSION"))
 128                                 line = "";
 129                         reply_queue.clear();
 130                 }
 131         }
 132
 133         public boolean opened() {
 134                 return altos != null;
 135         }
 136
 137         public void close() {
 138                 if (altos != null)
 139                         libaltos.altos_close(altos);
 140                 if (input_thread != null) {
 141                         try {
 142                                 input_thread.interrupt();
 143                                 input_thread.join();
 144                         } catch (InterruptedException e) {
 145                         }
 146                         input_thread = null;
 147                 }
 148                 if (altos != null) {
 149                         libaltos.altos_free(altos);
 150                         altos = null;
 151                 }
 152         }
 153
 154         public void putc(char c) {
 155                 if (altos != null)
 156                         libaltos.altos_putchar(altos, c);
 157         }
 158
 159         public void print(String data) {
 160 //h             System.out.printf("\"%s\" ", data);
 161                 for (int i = 0; i < data.length(); i++)
 162                         putc(data.charAt(i));
 163         }
 164
 165         public void printf(String format, Object ... arguments) {
 166                 print(String.format(format, arguments));
 167         }
 168
 169         public void open(altos_device device) throws FileNotFoundException {
 170                 close();
 171                 altos = libaltos.altos_open(device);
 172                 if (altos == null)
 173                         throw new FileNotFoundException(device.getPath());
 174                 input_thread = new Thread(this);
 175                 input_thread.start();
 176                 print("\nE 0\n");
 177                 try {
 178                         Thread.sleep(200);
 179                 } catch (InterruptedException e) {
 180                 }
 181                 flush();
 182         }
 183
 184         public void set_channel(int channel) {
 185                 if (altos != null)
 186                         printf("m 0\nc r %d\nm 1\n", channel);
 187         }
 188
 189         public void set_callsign(String callsign) {
 190                 if (altos != null)
 191                         printf ("c c %s\n", callsign);
 192         }
 193
 194         public AltosSerial() {
 195                 altos = null;
 196                 input_thread = null;
 197                 line = "";
 198                 monitors = new LinkedList<LinkedBlockingQueue<String>> ();
 199                 reply_queue = new LinkedBlockingQueue<String> ();
 200         }
 201 }