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
  49         public void run () {
  50                 int c;
  51
  52                 try {
  53                         for (;;) {
  54                                 c = libaltos.altos_getchar(altos, 0);
  55                                 if (Thread.interrupted())
  56                                         break;
  57                                 if (c == -1)
  58                                         continue;
  59                                 if (c == '\r')
  60                                         continue;
  61                                 synchronized(this) {
  62                                         if (c == '\n') {
  63                                                 if (line != "") {
  64                                                         if (line.startsWith("VERSION")) {
  65                                                                 for (int e = 0; e < monitors.size(); e++) {
  66                                                                         LinkedBlockingQueue<String> q = monitors.get(e);
  67                                                                         q.put(line);
  68                                                                 }
  69                                                         } else
  70                                                                 reply_queue.put(line);
  71                                                         line = "";
  72                                                 }
  73                                         } else {
  74                                                 line = line + (char) c;
  75                                         }
  76                                 }
  77                         }
  78                 } catch (InterruptedException e) {
  79                 }
  80         }
  81
  82         public void flush_reply() {
  83                 reply_queue.clear();
  84         }
  85
  86         public String get_reply() throws InterruptedException {
  87                 libaltos.altos_flush(altos);
  88                 String line = reply_queue.take();
  89                 return line;
  90         }
  91
  92         public void add_monitor(LinkedBlockingQueue<String> q) {
  93                 monitors.add(q);
  94         }
  95
  96         public void remove_monitor(LinkedBlockingQueue<String> q) {
  97                 monitors.remove(q);
  98         }
  99
 100         public void flush () {
 101                 synchronized(this) {
 102                         if (!"VERSION".startsWith(line) && !line.startsWith("VERSION"))
 103                                 line = "";
 104                         reply_queue.clear();
 105                 }
 106         }
 107
 108         public boolean opened() {
 109                 return altos != null;
 110         }
 111
 112         public void close() {
 113                 if (altos != null)
 114                         libaltos.altos_close(altos);
 115                 if (input_thread != null) {
 116                         try {
 117                                 input_thread.interrupt();
 118                                 input_thread.join();
 119                         } catch (InterruptedException e) {
 120                         }
 121                         input_thread = null;
 122                 }
 123                 if (altos != null) {
 124                         libaltos.altos_free(altos);
 125                         altos = null;
 126                 }
 127         }
 128
 129         public void putc(char c) {
 130                 if (altos != null)
 131                         libaltos.altos_putchar(altos, c);
 132         }
 133
 134         public void print(String data) {
 135                 for (int i = 0; i < data.length(); i++)
 136                         putc(data.charAt(i));
 137         }
 138
 139         public void printf(String format, Object ... arguments) {
 140                 print(String.format(format, arguments));
 141         }
 142
 143         public void open(altos_device device) throws FileNotFoundException {
 144                 close();
 145                 altos = libaltos.altos_open(device);
 146                 if (altos == null)
 147                         throw new FileNotFoundException(device.getPath());
 148                 input_thread = new Thread(this);
 149                 input_thread.start();
 150                 print("\nE 0\n");
 151                 try {
 152                         Thread.sleep(200);
 153                 } catch (InterruptedException e) {
 154                 }
 155                 flush();
 156         }
 157
 158         public void set_channel(int channel) {
 159                 if (altos != null)
 160                         printf("m 0\nc r %d\nm 1\n", channel);
 161         }
 162
 163         public void set_callsign(String callsign) {
 164                 if (altos != null)
 165                         printf ("c c %s\n", callsign);
 166         }
 167
 168         public AltosSerial() {
 169                 altos = null;
 170                 input_thread = null;
 171                 line = "";
 172                 monitors = new LinkedList<LinkedBlockingQueue<String>> ();
 173                 reply_queue = new LinkedBlockingQueue<String> ();
 174         }
 175 }