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")) {
  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                 libaltos.altos_flush(altos);
 105         }
 106
 107         public void flush_input() {
 108                 flush_output();
 109                 try {
 110                         Thread.sleep(200);
 111                 } catch (InterruptedException ie) {
 112                 }
 113                 synchronized(this) {
 114                         if (!"VERSION".startsWith(line) &&
 115                             !line.startsWith("VERSION"))
 116                                 line = "";
 117                         reply_queue.clear();
 118                 }
 119         }
 120
 121         public String get_reply() throws InterruptedException {
 122                 flush_output();
 123                 String line = reply_queue.take();
 124                 return line;
 125         }
 126
 127         public void add_monitor(LinkedBlockingQueue<String> q) {
 128                 set_monitor(true);
 129                 monitors.add(q);
 130         }
 131
 132         public void remove_monitor(LinkedBlockingQueue<String> q) {
 133                 monitors.remove(q);
 134                 if (monitors.isEmpty())
 135                         set_monitor(false);
 136         }
 137
 138         public boolean opened() {
 139                 return altos != null;
 140         }
 141
 142         public void close() {
 143                 if (altos != null) {
 144                         libaltos.altos_close(altos);
 145                 }
 146                 if (input_thread != null) {
 147                         try {
 148                                 input_thread.interrupt();
 149                                 input_thread.join();
 150                         } catch (InterruptedException e) {
 151                         }
 152                         input_thread = null;
 153                 }
 154                 if (altos != null) {
 155                         libaltos.altos_free(altos);
 156                         altos = null;
 157                 }
 158         }
 159
 160         public void putc(char c) {
 161                 if (altos != null)
 162                         libaltos.altos_putchar(altos, c);
 163         }
 164
 165         public void print(String data) {
 166 //              System.out.printf("\"%s\" ", data);
 167                 for (int i = 0; i < data.length(); i++)
 168                         putc(data.charAt(i));
 169         }
 170
 171         public void printf(String format, Object ... arguments) {
 172                 print(String.format(format, arguments));
 173         }
 174
 175         public void open(altos_device device) throws FileNotFoundException {
 176                 close();
 177                 altos = libaltos.altos_open(device);
 178                 if (altos == null)
 179                         throw new FileNotFoundException(device.getPath());
 180                 input_thread = new Thread(this);
 181                 input_thread.start();
 182                 print("~\nE 0\n");
 183                 set_monitor(monitor_mode);
 184                 flush_input();
 185         }
 186
 187         public void set_channel(int channel) {
 188                 if (altos != null) {
 189                         if (monitor_mode)
 190                                 printf("m 0\nc r %d\nm 1\n", channel);
 191                         else
 192                                 printf("c r %d\n", channel);
 193                 }
 194         }
 195
 196         void set_monitor(boolean monitor) {
 197                 monitor_mode = monitor;
 198                 if (altos != null) {
 199                         if (monitor)
 200                                 printf("m 1\n");
 201                         else
 202                                 printf("m 0\n");
 203                 }
 204         }
 205
 206         public void set_callsign(String callsign) {
 207                 if (altos != null)
 208                         printf ("c c %s\n", callsign);
 209         }
 210
 211         public AltosSerial() {
 212                 altos = null;
 213                 input_thread = null;
 214                 line = "";
 215                 monitor_mode = false;
 216                 monitors = new LinkedList<LinkedBlockingQueue<String>> ();
 217                 reply_queue = new LinkedBlockingQueue<String> ();
 218         }
 219 }