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/*
* Copyright © 2011 Keith Packard <keithp@keithp.com>
* Copyright © 2012 Mike Beattie <mike@ethernal.org>
*
* 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.
*/
package org.altusmetrum.AltosDroid;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
//import android.os.Bundle;
import android.os.Handler;
//import android.os.Message;
import android.util.Log;
import org.altusmetrum.altoslib_2.*;
public class AltosBluetooth extends AltosLink {
// Debugging
private static final String TAG = "AltosBluetooth";
private static final boolean D = true;
private ConnectThread connect_thread = null;
private Thread input_thread = null;
private Handler handler;
private BluetoothAdapter adapter;
private BluetoothDevice device;
private BluetoothSocket socket;
private InputStream input;
private OutputStream output;
// Constructor
public AltosBluetooth(BluetoothDevice in_device, Handler in_handler) {
adapter = BluetoothAdapter.getDefaultAdapter();
device = in_device;
handler = in_handler;
connect_thread = new ConnectThread(device);
connect_thread.start();
}
private class ConnectThread extends Thread {
private final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
public ConnectThread(BluetoothDevice device) {
BluetoothSocket tmp_socket = null;
try {
tmp_socket = device.createInsecureRfcommSocketToServiceRecord(SPP_UUID);
} catch (IOException e) {
e.printStackTrace();
}
socket = tmp_socket;
}
public void run() {
if (D) Log.d(TAG, "ConnectThread: BEGIN");
setName("ConnectThread");
// Always cancel discovery because it will slow down a connection
adapter.cancelDiscovery();
synchronized (AltosBluetooth.this) {
// Make a connection to the BluetoothSocket
try {
// This is a blocking call and will only return on a
// successful connection or an exception
socket.connect();
input = socket.getInputStream();
output = socket.getOutputStream();
} catch (IOException e) {
// Close the socket
try {
socket.close();
} catch (IOException e2) {
if (D) Log.e(TAG, "ConnectThread: Failed to close() socket after failed connection");
}
input = null;
output = null;
AltosBluetooth.this.notifyAll();
handler.obtainMessage(TelemetryService.MSG_CONNECT_FAILED).sendToTarget();
if (D) Log.e(TAG, "ConnectThread: Failed to establish connection");
return;
}
input_thread = new Thread(AltosBluetooth.this);
input_thread.start();
// Configure the newly connected device for telemetry
print("~\nE 0\n");
set_monitor(false);
// Let TelemetryService know we're connected
handler.obtainMessage(TelemetryService.MSG_CONNECTED).sendToTarget();
// Notify other waiting threads, now that we're connected
AltosBluetooth.this.notifyAll();
// Reset the ConnectThread because we're done
connect_thread = null;
if (D) Log.d(TAG, "ConnectThread: Connect completed");
}
}
public void cancel() {
try {
if (socket != null)
socket.close();
} catch (IOException e) {
if (D) Log.e(TAG, "ConnectThread: close() of connect socket failed", e);
}
}
}
private synchronized void wait_connected() throws InterruptedException, IOException {
if (input == null) {
wait();
if (input == null) throw new IOException();
}
}
private void connection_lost() {
if (D) Log.e(TAG, "Connection lost during I/O");
handler.obtainMessage(TelemetryService.MSG_DISCONNECTED).sendToTarget();
}
public void print(String data) {
byte[] bytes = data.getBytes();
if (D) Log.d(TAG, "print(): begin");
try {
wait_connected();
output.write(bytes);
if (D) Log.d(TAG, "print(): Wrote bytes: '" + data.replace('\n', '\\') + "'");
} catch (IOException e) {
connection_lost();
} catch (InterruptedException e) {
connection_lost();
}
}
public void putchar(byte c) {
byte[] bytes = { c };
if (D) Log.d(TAG, "print(): begin");
try {
wait_connected();
output.write(bytes);
if (D) Log.d(TAG, "print(): Wrote byte: '" + c + "'");
} catch (IOException e) {
connection_lost();
} catch (InterruptedException e) {
connection_lost();
}
}
public int getchar() {
try {
wait_connected();
return input.read();
} catch (IOException e) {
connection_lost();
} catch (java.lang.InterruptedException e) {
connection_lost();
}
return AltosLink.ERROR;
}
public void close() {
if (D) Log.d(TAG, "close(): begin");
synchronized(this) {
if (D) Log.d(TAG, "close(): synched");
if (connect_thread != null) {
if (D) Log.d(TAG, "close(): stopping connect_thread");
connect_thread.cancel();
connect_thread = null;
}
if (D) Log.d(TAG, "close(): Closing socket");
try {
socket.close();
} catch (IOException e) {
if (D) Log.e(TAG, "close(): unable to close() socket");
}
if (input_thread != null) {
if (D) Log.d(TAG, "close(): stopping input_thread");
try {
if (D) Log.d(TAG, "close(): input_thread.interrupt().....");
input_thread.interrupt();
if (D) Log.d(TAG, "close(): input_thread.join().....");
input_thread.join();
} catch (Exception e) {}
input_thread = null;
}
input = null;
output = null;
notifyAll();
}
}
// We override this method so that we can add some debugging. Not 100% elegant, but more useful
// than debugging one char at a time above in getchar()!
public void add_reply(AltosLine line) throws InterruptedException {
if (D) Log.d(TAG, String.format("Got REPLY: %s", line.line));
super.add_reply(line);
}
//public void flush_output() { super.flush_output(); }
// Stubs of required methods when extending AltosLink
public boolean can_cancel_reply() { return false; }
public boolean show_reply_timeout() { return true; }
public void hide_reply_timeout() { }
}
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