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/*
* 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 gnu.io.*;
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 {
InputStream serial_in;
LinkedList<LinkedBlockingQueue<String>> monitors;
LinkedBlockingQueue<String> reply_queue;
Thread input_thread;
String line;
public void run () {
int c;
try {
for (;;) {
c = serial_in.read();
if (Thread.interrupted())
break;
if (c == -1)
continue;
if (c == '\r')
continue;
synchronized(this) {
if (c == '\n') {
if (line != "") {
if (line.startsWith("VERSION")) {
for (int e = 0; e < monitors.size(); e++) {
LinkedBlockingQueue<String> q = monitors.get(e);
q.put(line);
}
} else
reply_queue.put(line);
line = "";
}
} else {
line = line + (char) c;
}
}
}
} catch (IOException e) {
} catch (InterruptedException e) {
}
}
public String get_reply() throws InterruptedException {
return reply_queue.take();
}
public void add_monitor(LinkedBlockingQueue<String> q) {
monitors.add(q);
}
public void remove_monitor(LinkedBlockingQueue<String> q) {
monitors.remove(q);
}
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.interrupt();
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 void open(CommPort c) throws IOException {
close();
try {
c.enableReceiveTimeout(1000); /* icky. the read method cannot be interrupted */
} catch (UnsupportedCommOperationException ee) {
}
serial_in = c.getInputStream();
input_thread = new Thread(this);
input_thread.start();
}
public AltosSerialReader () {
serial_in = null;
input_thread = null;
line = "";
monitors = new LinkedList<LinkedBlockingQueue<String>> ();
reply_queue = new LinkedBlockingQueue<String> ();
}
}
public class AltosSerial {
OutputStream serial_out = null;
AltosSerialReader reader = null;
CommPort comm_port = null;
public void close() {
try {
serial_out.close();
} catch (IOException ee) {
}
reader.close();
if (comm_port != null) {
comm_port.close();
}
}
public void open(File serial_name) throws FileNotFoundException {
reader.open(serial_name);
serial_out = new FileOutputStream(serial_name);
}
public void open(CommPort c) throws IOException {
reader.open(c);
serial_out = c.getOutputStream();
}
public void connect(String port_name) throws IOException, NoSuchPortException, PortInUseException {
comm_port = new RXTXPort(port_name);
open(comm_port);
}
void init() {
reader = new AltosSerialReader();
}
public void add_monitor(LinkedBlockingQueue<String> q) {
reader.add_monitor(q);
}
public void remove_monitor(LinkedBlockingQueue<String> q) {
reader.remove_monitor(q);
}
public AltosSerial() {
init();
}
public AltosSerial(File serial_name) throws FileNotFoundException {
init();
open(serial_name);
}
public AltosSerial(CommPort comm_port) throws IOException {
init();
open(comm_port);
}
}
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