blob: 9537f19073074df88e03736285b03a9962c0134a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Copyright © 2010 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* Deal with TeleDongle on a serial port
*/
package altosui;
import java.lang.*;
import java.io.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.LinkedList;
import java.util.Iterator;
import altosui.AltosSerialMonitor;
/*
* This class reads from the serial port and places each received
* line in a queue. Dealing with that queue is left up to other
* threads.
*/
class AltosSerialReader implements Runnable {
FileInputStream serial_in;
LinkedBlockingQueue<String> monitor_queue;
LinkedBlockingQueue<String> reply_queue;
Thread input_thread;
String line;
public void run () {
int c;
try {
while ((c = serial_in.read()) != -1) {
if (c == '\r')
continue;
synchronized(this) {
if (c == '\n') {
if (line != "") {
if (line.startsWith("VERSION"))
monitor_queue.put(line);
else
reply_queue.put(line);
line = "";
}
} else {
line = line + (char) c;
}
}
}
} catch (IOException e) {
} catch (InterruptedException e) {
}
}
public String get_telem() throws InterruptedException {
return monitor_queue.take();
}
public String get_reply() throws InterruptedException {
return reply_queue.take();
}
public void flush () {
synchronized(this) {
if (!"VERSION".startsWith(line) && !line.startsWith("VERSION"))
line = "";
reply_queue.clear();
}
}
public boolean opened() {
return serial_in != null;
}
public void close() {
if (serial_in != null) {
try {
serial_in.close();
} catch (IOException e) {
}
serial_in = null;
}
if (input_thread != null) {
try {
input_thread.join();
} catch (InterruptedException e) {
}
input_thread = null;
}
}
public void open(File name) throws FileNotFoundException {
close();
serial_in = new FileInputStream(name);
input_thread = new Thread(this);
input_thread.start();
}
public AltosSerialReader () {
serial_in = null;
input_thread = null;
line = "";
monitor_queue = new LinkedBlockingQueue<String> ();
reply_queue = new LinkedBlockingQueue<String> ();
}
}
public class AltosSerial implements Runnable {
FileOutputStream serial_out = null;
Thread monitor_thread = null;
AltosSerialReader reader = null;
LinkedList<AltosSerialMonitor> callbacks;
public void run() {
try {
for (;;) {
String s = reader.get_telem();
synchronized(callbacks) {
Iterator<AltosSerialMonitor> i = callbacks.iterator();
while (i.hasNext()) {
i.next().data(s);
}
}
}
} catch (InterruptedException e) {
}
}
boolean need_monitor() {
return reader.opened() && !callbacks.isEmpty();
}
void maybe_stop_monitor() {
if (!need_monitor() && monitor_thread != null) {
monitor_thread.interrupt();
try {
monitor_thread.join();
} catch (InterruptedException e) {
} finally {
monitor_thread = null;
}
}
}
void maybe_start_monitor() {
if (need_monitor() && monitor_thread == null) {
monitor_thread = new Thread(this);
monitor_thread.start();
}
}
public void monitor(AltosSerialMonitor monitor) {
synchronized(callbacks) {
callbacks.add(monitor);
maybe_start_monitor();
}
}
public void unmonitor(AltosSerialMonitor monitor) {
synchronized(callbacks) {
callbacks.remove(monitor);
maybe_stop_monitor();
}
}
public void close() {
synchronized(callbacks) {
reader.close();
maybe_stop_monitor();
}
}
public void open(File serial_name) throws FileNotFoundException {
reader.open(serial_name);
serial_out = new FileOutputStream(serial_name);
try {
serial_out.write('?');
serial_out.write('\r');
} catch (IOException e) {
}
}
void init() {
reader = new AltosSerialReader();
callbacks = new LinkedList<AltosSerialMonitor>();
}
public AltosSerial() {
init();
}
public AltosSerial(File serial_name) throws FileNotFoundException {
init();
open(serial_name);
}
}
|
