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         boolean monitor_mode;
  51
  52         public void run () {
  53                 int c;
  54
  55                 try {
  56                         for (;;) {
  57                                 c = libaltos.altos_getchar(altos, 0);
  58                                 if (Thread.interrupted())
  59                                         break;
  60                                 if (c == -1)
  61                                         continue;
  62                                 if (c == '\r')
  63                                         continue;
  64                                 synchronized(this) {
  65                                         if (c == '\n') {
  66                                                 if (line_count != 0) {
  67                                                         try {
  68                                                                 line = new String(line_bytes, 0, line_count, "UTF-8");
  69                                                         } catch (UnsupportedEncodingException ue) {
  70                                                                 line = "";
  71                                                                 for (int i = 0; i < line_count; i++)
  72                                                                         line = line + line_bytes[i];
  73                                                         }
  74                                                         if (line.startsWith("VERSION") || line.startsWith("CRC")) {
  75                                                                 for (int e = 0; e < monitors.size(); e++) {
  76                                                                         LinkedBlockingQueue<String> q = monitors.get(e);
  77                                                                         q.put(line);
  78                                                                 }
  79                                                         } else {
  80 //                                                              System.out.printf("GOT: %s\n", line);
  81                                                                 reply_queue.put(line);
  82                                                         }
  83                                                         line_count = 0;
  84                                                         line = "";
  85                                                 }
  86                                         } else {
  87                                                 if (line_bytes == null) {
  88                                                         line_bytes = new byte[256];
  89                                                 } else if (line_count == line_bytes.length) {
  90                                                         byte[] new_line_bytes = new byte[line_count * 2];
  91                                                         System.arraycopy(line_bytes, 0, new_line_bytes, 0, line_count);
  92                                                         line_bytes = new_line_bytes;
  93                                                 }
  94                                                 line_bytes[line_count] = (byte) c;
  95                                                 line_count++;
  96                                         }
  97                                 }
  98                         }
  99                 } catch (InterruptedException e) {
 100                 }
 101         }
 102
 103         public void flush_output() {
 104                 if (altos != null)
 105                         libaltos.altos_flush(altos);
 106         }
 107
 108         public void flush_input() {
 109                 flush_output();
 110                 try {
 111                         Thread.sleep(200);
 112                 } catch (InterruptedException ie) {
 113                 }
 114                 synchronized(this) {
 115                         if (!"VERSION".startsWith(line) &&
 116                             !line.startsWith("VERSION"))
 117                                 line = "";
 118                         reply_queue.clear();
 119                 }
 120         }
 121
 122         public String get_reply() throws InterruptedException {
 123                 flush_output();
 124                 String line = reply_queue.take();
 125                 return line;
 126         }
 127
 128         public void add_monitor(LinkedBlockingQueue<String> q) {
 129                 set_monitor(true);
 130                 monitors.add(q);
 131         }
 132
 133         public void remove_monitor(LinkedBlockingQueue<String> q) {
 134                 monitors.remove(q);
 135                 if (monitors.isEmpty())
 136                         set_monitor(false);
 137         }
 138
 139         public boolean opened() {
 140                 return altos != null;
 141         }
 142
 143         public void close() {
 144                 if (altos != null) {
 145                         libaltos.altos_close(altos);
 146                 }
 147                 if (input_thread != null) {
 148                         try {
 149                                 input_thread.interrupt();
 150                                 input_thread.join();
 151                         } catch (InterruptedException e) {
 152                         }
 153                         input_thread = null;
 154                 }
 155                 if (altos != null) {
 156                         libaltos.altos_free(altos);
 157                         altos = null;
 158                 }
 159         }
 160
 161         public void putc(char c) {
 162                 if (altos != null)
 163                         libaltos.altos_putchar(altos, c);
 164         }
 165
 166         public void print(String data) {
 167 //              System.out.printf("\"%s\" ", data);
 168                 for (int i = 0; i < data.length(); i++)
 169                         putc(data.charAt(i));
 170         }
 171
 172         public void printf(String format, Object ... arguments) {
 173                 print(String.format(format, arguments));
 174         }
 175
 176         public void open(altos_device device) throws FileNotFoundException {
 177                 close();
 178                 altos = libaltos.altos_open(device);
 179                 if (altos == null)
 180                         throw new FileNotFoundException(device.getPath());
 181                 input_thread = new Thread(this);
 182                 input_thread.start();
 183                 print("~\nE 0\n");
 184                 flush_output();
 185                 set_monitor(monitor_mode);
 186         }
 187
 188         public void set_channel(int channel) {
 189                 if (altos != null) {
 190                         if (monitor_mode)
 191                                 printf("m 0\nc r %d\nm 1\n", channel);
 192                         else
 193                                 printf("c r %d\n", channel);
 194                         flush_output();
 195                 }
 196         }
 197
 198         void set_monitor(boolean monitor) {
 199                 monitor_mode = monitor;
 200                 if (altos != null) {
 201                         if (monitor)
 202                                 printf("m 1\n");
 203                         else
 204                                 printf("m 0\n");
 205                         flush_output();
 206                 }
 207         }
 208
 209         public void set_callsign(String callsign) {
 210                 if (altos != null) {
 211                         printf ("c c %s\n", callsign);
 212                         flush_output();
 213                 }
 214         }
 215
 216         public AltosSerial() {
 217                 altos = null;
 218                 input_thread = null;
 219                 line = "";
 220                 monitor_mode = false;
 221                 monitors = new LinkedList<LinkedBlockingQueue<String>> ();
 222                 reply_queue = new LinkedBlockingQueue<String> ();
 223         }
 224 }