summaryrefslogtreecommitdiff
path: root/metawatch/metawatch.cpp
blob: a8eab4d0091a127886c044c23de690bea288eda4 (plain)
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
#include <QtCore/QDebug>

#include "metawatchpaintengine.h"
#include "metawatch.h"

using namespace sowatch;
QTM_USE_NAMESPACE

#define SINGLE_LINE_UPDATE 0
#define PROTOCOL_DEBUG 0

const char MetaWatch::btnToWatch[8] = {
	0, 1, 2, 3, 5, 6, -1, -1
};

const int MetaWatch::connectRetryTimes[] = {
	5, 10, 30, 60, 120, 300
};

const quint8 MetaWatch::bitRevTable[16] = {
	0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
};

const quint16 MetaWatch::crcTable[256] = {
	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};

#if 0 /* This snippet was used to build the table seen above. */
	quint16 remainder;
	int dividend;
	quint8 bit;

	for (dividend = 0; dividend < 256; dividend++) {
		remainder = dividend << 8;
		for (bit = 8; bit > 0; bit--) {
			if (remainder & 0x8000) {
				remainder = (remainder << 1) ^ 0x1021;
			} else {
				remainder = (remainder << 1);
			}
		}
		if ((dividend % 8) == 0) {
			printf(",\n0x%04hx", remainder);
		} else {
			printf(", 0x%04hx", remainder);
		}
	}
#endif

MetaWatch::MetaWatch(ConfigKey* settings, QObject* parent) :
	Watch(parent),
	_settings(settings->getSubkey(QString(), this)),
	_idleTimer(new QTimer(this)), _ringTimer(new QTimer(this)),
	_watchTime(), _watchBattery(0), _watchCharging(false),
	_currentMode(IdleMode),	_paintMode(IdleMode),
	_paintEngine(0),
	_connectRetries(0),	_connected(false),
	_connectTimer(new QTimer(this)),
	_connectAlignedTimer(new QSystemAlignedTimer(this)),
	_localDev(new QBluetoothLocalDevice(this)),
	_socket(0),
	_sendTimer(new QTimer(this))
{
	// Read current device settings
	connect(_settings, SIGNAL(subkeyChanged(QString)), SLOT(settingChanged(QString)));

	_address = QBluetoothAddress(settings->value("address").toString());
	_notificationTimeout = settings->value("notification-timeout", 15).toInt();
	_24hMode = settings->value("24h-mode", false).toBool();
	_dayMonthOrder = settings->value("day-month-order", false).toBool();
	_showSeconds = settings->value("show-seconds", false).toBool();
	_separationLines = false; // Seems to be v2 UI only
	_autoBacklight = settings->value("auto-backlight", false).toBool();

	_buttonNames << "A" << "B" << "C" << "D" << "E" << "F";

	// Configure timers (but do not turn them on yet)
	_idleTimer->setInterval(_notificationTimeout * 1000);
	_idleTimer->setSingleShot(true);
	connect(_idleTimer, SIGNAL(timeout()), SIGNAL(idling()));

	_ringTimer->setInterval(DelayBetweenRings);
	connect(_ringTimer, SIGNAL(timeout()), SLOT(timedRing()));

	_connectTimer->setSingleShot(true);
	_connectAlignedTimer->setSingleShot(true);
	connect(_connectTimer, SIGNAL(timeout()), SLOT(timedReconnect()));
	connect(_connectAlignedTimer, SIGNAL(timeout()), SLOT(timedReconnect()));

	_sendTimer->setInterval(DelayBetweenMessages);
	connect(_sendTimer, SIGNAL(timeout()), SLOT(timedSend()));

	// Connect other signals
	connect(_localDev, SIGNAL(hostModeStateChanged(QBluetoothLocalDevice::HostMode)), SLOT(localDevModeChanged(QBluetoothLocalDevice::HostMode)));

	// Check to see if we can connect right away
	if (_localDev->hostMode() != QBluetoothLocalDevice::HostPoweredOff) {
		// Do an initial connection attempt after a short delay
		// (To give time for other plugins to initialize, etc.)
		scheduleConnect();
	} else {
		qDebug() << "Not starting MetaWatch connection because BT is off";
	}
}

MetaWatch::~MetaWatch()
{
	if (_socket) {
		_socket->close();
		delete _socket;
	}
	if (_paintEngine) {
		delete _paintEngine;
	}
}

QPaintEngine* MetaWatch::paintEngine() const
{
	if (!_paintEngine) {
		_paintEngine = new MetaWatchPaintEngine(const_cast<MetaWatch*>(this));
	}

	return _paintEngine;
}

QString MetaWatch::model() const
{
	return "metawatch";
}

QStringList MetaWatch::buttons() const
{
	return _buttonNames;
}

bool MetaWatch::isConnected() const
{
	return _connected;
}

bool MetaWatch::busy() const
{
	return !_connected ||
			_socket->state() != QBluetoothSocket::ConnectedState ||
			_toSend.size() > 20;
}

void MetaWatch::setDateTime(const QDateTime &dateTime)
{
	Message msg(SetRealTimeClock, QByteArray(8, 0));
	const QDate& date = dateTime.date();
	const QTime& time = dateTime.time();

	msg.data[0] = (date.year() & 0xFF00) >> 8;
	msg.data[1] = date.year() & 0xFF;
	msg.data[2] = date.month();
	msg.data[3] = date.day();
	// Qt week starts on Monday([1-7]), MetaWatch week starts on Sunday([0-6]).
	msg.data[4] = date.dayOfWeek() % 7;
	msg.data[5] = time.hour();
	msg.data[6] = time.minute();
	msg.data[7] = time.second();

	send(msg);
}

void MetaWatch::queryDateTime()
{
	Message msg(GetRealTimeClock);
	sendIfNotQueued(msg);
}

QDateTime MetaWatch::dateTime() const
{
	return _watchTime;
}

void MetaWatch::queryBatteryLevel()
{
	Message msg(ReadBatteryVoltage);
	sendIfNotQueued(msg);
}

int MetaWatch::batteryLevel() const
{
	return _watchBattery;
}

void MetaWatch::queryCharging()
{
	Message msg(ReadBatteryVoltage);
	sendIfNotQueued(msg);
}

bool MetaWatch::charging() const
{
	return _watchCharging;
}

void MetaWatch::updateNotificationCount(Notification::Type type, int count)
{
	Q_UNUSED(type);
	Q_UNUSED(count);
	// Default implementation does nothing
}

void MetaWatch::updateWeather(WeatherNotification *weather)
{
	Q_UNUSED(weather);
	// Default implementation does nothing
}

void MetaWatch::displayIdleScreen()
{
	_currentMode = IdleMode;
	_paintMode = IdleMode;
	changeMode(_currentMode);

	_ringTimer->stop();
	_idleTimer->stop();
	setVibrateMode(false, 0, 0, 0);
}

void MetaWatch::displayNotification(Notification *notification)
{
	_currentMode = NotificationMode;
	_paintMode = NotificationMode;
	changeMode(_currentMode);

	if (notification->type() == Notification::CallNotification) {
		timedRing();
		_ringTimer->start();
		_idleTimer->stop();
	} else {
		_ringTimer->stop();
		setVibrateMode(true, VibrateLength, VibrateLength, 2);
		_idleTimer->start();
	}
}

void MetaWatch::displayApplication()
{
	_currentMode = ApplicationMode;
	_paintMode = ApplicationMode;
	changeMode(_currentMode);

	_ringTimer->stop();
	_idleTimer->stop();
}

void MetaWatch::vibrate(int msecs)
{
	setVibrateMode(true, msecs, 0, 1);
}

MetaWatch::Mode MetaWatch::currentMode() const
{
	return _currentMode;
}

MetaWatch::Mode MetaWatch::paintTargetMode() const
{
	return _paintMode;
}

QImage* MetaWatch::imageFor(Mode mode)
{
	return &_image[mode];
}

void MetaWatch::grabButton(Mode mode, Button button)
{
	enableButton(mode, button, PressOnly);
	enableButton(mode, button, PressAndRelease);
}

void MetaWatch::ungrabButton(Mode mode, Button button)
{
	disableButton(mode, button, PressOnly);
	disableButton(mode, button, PressAndRelease);
}

quint16 MetaWatch::calcCrc(const QByteArray &data, int size)
{
	quint16 remainder = 0xFFFF;

	for (int i = 0; i < size; i++) {
		quint8 byte = data[i];
		byte = (bitRevTable[byte & 0xF] << 4) | bitRevTable[(byte & 0xF0) >> 4];
		remainder = crcTable[byte ^ (remainder >> 8)] ^ (remainder << 8);
	}

	return remainder;
}

quint16 MetaWatch::calcCrc(const Message& msg)
{
	QByteArray data;
	const int msgSize = msg.data.size();

	data.resize(msgSize + 4);
	data[0] = 0x01;
	data[1] = msgSize + 6;
	data[2] = msg.type;
	data[3] = msg.options;
	data.replace(4, msgSize, msg.data);

	return calcCrc(data, msgSize + 4);
}

void MetaWatch::scheduleConnect()
{
	if (_connected ||
	        _connectAlignedTimer->isActive() || _connectTimer->isActive()) {
		// Already connected or already scheduled to connect.
		return;
	}

	_connectRetries = 0;
	_connectTimer->start(100);
}

void MetaWatch::scheduleRetryConnect()
{
	if (_connected ||
	        _connectAlignedTimer->isActive() || _connectTimer->isActive()) {
		// Already connected or already scheduled to connect.
		return;
	}

	int timeToNextRetry;
	if (_connectRetries >= connectRetryTimesSize) {
		timeToNextRetry = connectRetryTimes[connectRetryTimesSize - 1];
	} else {
		timeToNextRetry = connectRetryTimes[_connectRetries];
		_connectRetries++; // Increase the number of connection attemps
	}

	qDebug() << "Backing off for" << timeToNextRetry << "seconds for next retry";
	_connectAlignedTimer->start(timeToNextRetry / 2, timeToNextRetry * 2);
	if (_connectAlignedTimer->lastError() != QSystemAlignedTimer::NoError) {
		// Hopefully a future version of QSystemAlignedTimer implements this fallback
		// For now, we have to do it ourselves.
		qDebug() << "Note: using plain QTimer for retry";
		_connectTimer->start(timeToNextRetry * 1000);
	}
}

void MetaWatch::unscheduleConnect()
{
	_connectAlignedTimer->stop();
	_connectTimer->stop();
}

void MetaWatch::connectToWatch()
{
	delete _socket; //Delete socket from previous connect if any.
	_socket = new QBluetoothSocket(QBluetoothSocket::RfcommSocket);

	connect(_socket, SIGNAL(connected()), SLOT(socketConnected()));
	connect(_socket, SIGNAL(disconnected()), SLOT(socketDisconnected()));
	connect(_socket, SIGNAL(readyRead()), SLOT(socketData()));
	connect(_socket, SIGNAL(error(QBluetoothSocket::SocketError)),
			SLOT(socketError(QBluetoothSocket::SocketError)));
	connect(_socket, SIGNAL(stateChanged(QBluetoothSocket::SocketState)),
			SLOT(socketState(QBluetoothSocket::SocketState)));

	_socket->connectToService(_address, 1, QIODevice::ReadWrite | QIODevice::Unbuffered);
}

void MetaWatch::send(const Message &msg)
{
	_toSend.enqueue(msg);
	if (!_sendTimer->isActive()) {
		_sendTimer->start();
	}
}

void MetaWatch::sendIfNotQueued(const Message& msg)
{
	foreach (const Message& m, _toSend) {
		if (m.type == msg.type) {
			return; // Already on the queue, discard message.
		}
	}

	// Otherwise, send it as requested
	send(msg);
}

void MetaWatch::updateWatchProperties()
{
	quint8 optBits = 0;

	if (_24hMode)
		optBits |= 1 << 0;
	if (_dayMonthOrder)
		optBits |= 1 << 1;
	if (_showSeconds)
		optBits |= 1 << 2;
	if (_separationLines)
		optBits |= 1 << 3;
	if (_autoBacklight)
		optBits |= 1 << 4;

	qDebug() << "Setting watch properties to" << optBits;

	send(Message(PropertyOperation, QByteArray(), optBits));
}

void MetaWatch::setVibrateMode(bool enable, uint on, uint off, uint cycles)
{
	Message msg(SetVibrateMode, QByteArray(6, 0));

	msg.data[0] = enable ? 1 : 0;
	msg.data[1] = on & 0xFF;
	msg.data[2] = on >> 8;
	msg.data[3] = off & 0xFF;
	msg.data[4] = off >> 8;
	msg.data[5] = cycles;

	send(msg);
}

void MetaWatch::updateLcdLine(Mode mode, const QImage& image, int line)
{
	Message msg(WriteLcdBuffer, QByteArray(13, 0), (1 << 4) | (mode & 0x3));
	const char * scanLine = (const char *) image.constScanLine(line);

	msg.data[0] = line;
	msg.data.replace(1, 12, scanLine, 12);

	send(msg);
}

void MetaWatch::updateLcdLines(Mode mode, const QImage& image, int lineA, int lineB)
{
	Message msg(WriteLcdBuffer, QByteArray(26, 0), mode & 0x3);
	const char * scanLine = (const char *) image.constScanLine(lineA);

	msg.data[0] = lineA;
	msg.data.replace(1, 12, scanLine, 12);

	scanLine = (const char *) image.constScanLine(lineB);
	msg.data[13] = lineB;
	msg.data.replace(14, 12, scanLine, 12);

	send(msg);
}

void MetaWatch::updateLcdLines(Mode mode, const QImage& image, const QVector<bool>& lines)
{
	int lineCount = lines.count(true);
	int lineA = -1;

	if (lineCount == 0) return;

	qDebug() << "sending" << lineCount << "rows to watch";

	for (int line = 0; line < lines.size(); line++) {
		if (lines[line]) {
			lineCount--;
#if SINGLE_LINE_UPDATE
			updateLcdLine(mode, image, line);
			continue;
#endif
			if (lineA >= 0) {
				// We have a pair of lines to send.
				updateLcdLines(mode, image, lineA, line);
				lineA = -1;
			} else if (lineCount > 0) {
				// Still another line to send.
				lineA = line;
			} else {
				updateLcdLine(mode, image, line);
				break; // No more lines
			}
		}
	}


}

void MetaWatch::configureLcdIdleSystemArea(bool entireScreen)
{
	Message msg(ConfigureLcdIdleBufferSize, QByteArray(1, entireScreen ? 1 : 0));
	send(msg);
}

void MetaWatch::updateLcdDisplay(Mode mode, int startRow, int numRows)
{
	Message msg(UpdateLcdDisplay, QByteArray(), mode & 0x3);
	if (startRow != 0 || numRows != 0) {
		msg.data = QByteArray(2, 0);
		msg.data[0] = startRow;
		msg.data[1] = numRows;
	}
	send(msg);
}

void MetaWatch::loadLcdTemplate(Mode mode, int templ)
{
	Message msg(LoadLcdTemplate, QByteArray(1, templ), mode & 0x3);
	send(msg);
}

void MetaWatch::changeMode(Mode mode)
{
	send(Message(ChangeMode, QByteArray(), mode & 0x3));
}

void MetaWatch::enableButton(Mode mode, Button button, ButtonPress press)
{
	Message msg(EnableButton, QByteArray(5, 0));

	Q_ASSERT(button >= 0 && button < 8);

	msg.data[0] = mode;
	msg.data[1] = btnToWatch[button];
	msg.data[2] = press;
	msg.data[3] = ButtonEvent;
	// We create a custom event code that allows us to know what
	// the pressed button and the event code were.
	msg.data[4] = 0x80 | ((press << 4) & 0x30) | (button & 0xF);

	qDebug() << "enable button" << button << "(" << press << ")" <<
	            "in mode" << mode << "to" << static_cast<unsigned char>(msg.data[4]);

	send(msg);
}

void MetaWatch::disableButton(Mode mode, Button button, ButtonPress press)
{
	Message msg(DisableButton, QByteArray(3, 0));

	Q_ASSERT(button >= 0 && button < 8);

	msg.data[0] = mode;
	msg.data[1] = btnToWatch[button];
	msg.data[2] = press;

	send(msg);
}

void MetaWatch::handleMessage(const Message &msg)
{
	switch (msg.type) {
	case GetDeviceTypeResponse:
		handleDeviceTypeMessage(msg);
		break;
	case GetRealTimeClockResponse:
		handleRealTimeClockMessage(msg);
		break;
	case PropertyOperationResponse:
		handlePropertyOperationMessage(msg);
		break;
	case StatusChangeEvent:
		handleStatusChangeMessage(msg);
		break;
	case ButtonEvent:
		handleButtonEventMessage(msg);
		break;
	case ReadBatteryVoltageResponse:
		handleBatteryVoltageMessage(msg);
		break;
	default:
		qWarning() << "Unknown message of type" << msg.type << "received";
		break;
	}
}

void MetaWatch::handleDeviceTypeMessage(const Message &msg)
{
	Q_ASSERT(msg.type == GetDeviceTypeResponse);
	if (msg.data.size() < 1) {
		qWarning() << "Short device type response";
	}
	qDebug() << "got device type" << msg.data[0];
}

void MetaWatch::handleRealTimeClockMessage(const Message &msg)
{
	int year = ((msg.data[0] & 0xFF) << 8) | (msg.data[1] & 0xFF);
	int month = msg.data[2] & 0xFF;
	int day = msg.data[3] & 0xFF;
	QDate d(year, month, day);
	int hour = msg.data[5] & 0xFF;
	int minute = msg.data[6] & 0xFF;
	int second = msg.data[7] & 0xFF;
	QTime t(hour, minute, second);
	_watchTime = QDateTime(d, t);

	qDebug() << "got time from watch" << _watchTime;

	emit dateTimeChanged();
}

void MetaWatch::handlePropertyOperationMessage(const Message& msg)
{
	Q_ASSERT(msg.type == PropertyOperationResponse);

	qDebug() << "got property operation result message";
	if (msg.options != 0) {
		qWarning() << "set property operation failed";
	}
}

void MetaWatch::handleStatusChangeMessage(const Message &msg)
{
	Q_ASSERT(msg.type == StatusChangeEvent);

	// TODO: Maybe something could be done...
	qDebug() << "got status change message";
}

void MetaWatch::handleButtonEventMessage(const Message &msg)
{
	if (!(msg.options & 0x80)) {
		// We didn't configure this button, reject.
		return;
	}

	ButtonPress press = static_cast<ButtonPress>((msg.options & 0x30) >> 4);
	int button = msg.options & 0xF;

	if (button >= 6) {
		qWarning() << "Unknown watch button" << button;
		return;
	}

	qDebug() << "button event" << button << " (" << press << ")";

	if (press == PressOnly) {
		emit buttonPressed(button);
	} else if (press == PressAndRelease) {
		emit buttonReleased(button);
	}
}

void MetaWatch::handleBatteryVoltageMessage(const Message &msg)
{
	Q_ASSERT(msg.type == ReadBatteryVoltageResponse);
	if (msg.data.size() < 6) {
		qWarning() << "Short battery voltage response:" << msg.data.size();
		return;
	}
	bool charging = msg.data[1];
	unsigned char level = msg.data[2];

	qDebug() << "got battery level" << level << "% "
			 << (_watchCharging ? "charging" : "discharging");

	// Just in case
	if (level > 100) level = 100;

	// Emit changed() signals as necessary
	if (charging != _watchCharging) {
		_watchCharging = charging;
		emit chargingChanged();
	}
	if (level != _watchBattery) {
		_watchBattery = level;
		emit batteryLevelChanged();
	}
}

void MetaWatch::settingChanged(const QString &key)
{
	qDebug() << "Metawatch setting changed:" << key;

	if (key == "address") {
		_address = QBluetoothAddress(_settings->value(key).toString());
	} else if (key == "notification-timeout") {
		_notificationTimeout = _settings->value(key, 15).toInt();
	} else if (key == "day-month-order") {
		_dayMonthOrder = _settings->value(key, false).toBool();
		if (isConnected()) updateWatchProperties();
	} else if (key == "24h-mode") {
		_24hMode = _settings->value(key, false).toBool();
		if (isConnected()) updateWatchProperties();
	} else if (key == "show-seconds") {
		_showSeconds = _settings->value(key, false).toBool();
		if (isConnected()) updateWatchProperties();
	} else if (key == "auto-backlight") {
		_autoBacklight = _settings->value(key, false).toBool();
		if (isConnected()) updateWatchProperties();
	}
}

void MetaWatch::localDevModeChanged(QBluetoothLocalDevice::HostMode state)
{
	qDebug() << "Local bluetooth device mode changed to" << state;
	if (state == QBluetoothLocalDevice::HostPoweredOff) {
		// Host bluetooth was powered down
		// Assume the socket has been disconnected
		socketDisconnected();
		// Cancel any pending connection attempts
		unscheduleConnect();
	} else {
		// Host bluetooth might have been powered up
		if (!_connected) {
			scheduleConnect();
		}
	}
}

void MetaWatch::socketConnected()
{
	if (!_connected) {
		qDebug() << "connected";

		_connected = true;
		_connectRetries = 0;
		_partialReceived.type = NoMessage;
		_partialReceived.data.clear();
		_currentMode = IdleMode;
		_paintMode = IdleMode;

		// Configure the watch according to user preferences
		updateWatchProperties();

		// Sync watch date & time
		setDateTime(QDateTime::currentDateTime());

		// Call the MetaWatch Model-specific setup routines
		handleWatchConnected();

		emit connected();
	}
}

void MetaWatch::socketDisconnected()
{
	// Signal disconnection if necessary
	if (_connected) {
		qDebug() << "disconnected";

		_connected = false;
		_toSend.clear();
		_sendTimer->stop();

		emit disconnected();
	}

	// Setup reconnection attempt if necessary
	if (_localDev->hostMode() != QBluetoothLocalDevice::HostPoweredOff) {
		scheduleRetryConnect();
	}
}

void MetaWatch::socketData()
{
	realReceive(false);
}

void MetaWatch::socketError(QBluetoothSocket::SocketError error)
{
	qWarning() << "Socket error:" << error;
	// Seems that sometimes a disconnection event may not be generated.
	socketDisconnected();
}

void MetaWatch::socketState(QBluetoothSocket::SocketState state)
{
	qDebug() << "socket is in" << state;
}

void MetaWatch::timedReconnect()
{
	connectToWatch();
}

void MetaWatch::timedSend()
{
	// If there are packets to be sent...
	if (_toSend.count() > 0) {
		// Send the packets to the watch
		realSend(_toSend.dequeue());
	}
	// If we sent all packets...
	if (_toSend.count() == 0) {
		// Stop the send timer to save battery
		_sendTimer->stop();
	}
}

void MetaWatch::timedRing()
{
	setVibrateMode(true, RingLength, RingLength, 3);
}

void MetaWatch::realSend(const Message &msg)
{
	const int msgSize = msg.data.size();
	QByteArray data;
	quint16 crc;

	Q_ASSERT(_connected && _socket);

	data.resize(msgSize + 6);
	data[0] = 0x01;
	data[1] = msgSize + 6;
	data[2] = msg.type;
	data[3] = msg.options;
	data.replace(4, msgSize, msg.data);
	crc = calcCrc(data, msgSize + 4);
	data[msgSize+4] = crc & 0xFF;
	data[msgSize+5] = crc >> 8;

#if PROTOCOL_DEBUG
	qDebug() << "sending" << data.toHex();
#endif

	_socket->write(data);
}

void MetaWatch::realReceive(bool block)
{
	do {
		qint64 dataRead;

		qDebug() << "received" << _socket->bytesAvailable() << "bytes";

		if (_partialReceived.type == 0) {
			/* Still not received even the packet type */
			/* Receive the full header, 4 bytes. */
			if (_socket->bytesAvailable() < 4 && !block) {
				/* Still not enough data available. */
				return; /* Wait for more, if non blocking. */
			}
			static const int HEADER_SIZE = 4;
			char header[HEADER_SIZE];

			dataRead = _socket->read(header, HEADER_SIZE);
#if PROTOCOL_DEBUG
			qDebug() << "received" << QByteArray(header, HEADER_SIZE).toHex();
#endif
			if (dataRead < 4) {
				qWarning() << "Short read";
				return;
			} else if (header[0] != 0x01 || header[1] > 32) {
				qWarning() << "Header not found, trying to recover";
				// Let's try to find the header in one of the four bits we read
				for (int i = 1; i < HEADER_SIZE; i++) {
					if (header[i] == 0x01) {
						// Header possibly found, try to recover by pushing
						// the partial header back into the buffer and retrying
						for (int j = HEADER_SIZE - 1; j >= i; j--) {
							_socket->ungetChar(header[j]);
						}
					}
				}
				// In any case, try to repeat.
				continue;
			}

			_partialReceived.type = static_cast<MessageType>(header[2]);
			_partialReceived.data.resize(header[1] - 6);
			_partialReceived.options = header[3];
			qDebug() << "got header";
		}

		/* We have the header; now, try to get the complete packet. */
		if (_socket->bytesAvailable() < (_partialReceived.data.size() + 2) &&
			!block) {
			return; /* Wait for more. */
		}
		dataRead = _socket->read(_partialReceived.data.data(), _partialReceived.data.size());
		if (dataRead < _partialReceived.data.size()) {
			qWarning() << "Short read";
			return;
		}

		char tail[2];
		dataRead = _socket->read(tail, 2);
		if (dataRead < 2) {
			qWarning() << "Short read";
			return;
		}

		quint16 realCrc = calcCrc(_partialReceived);
		quint16 expectedCrc = tail[1] << 8 | (tail[0] & 0xFFU);
		if (realCrc == expectedCrc) {
#if PROTOCOL_DEBUG
			qDebug() << "received" << _partialReceived.type << _partialReceived.options
			         << _partialReceived.data.toHex();
#endif
			handleMessage(_partialReceived);
		} else {
			qWarning() << "CRC error?";
		}

		// Prepare for the next packet
		_partialReceived.data.clear();
		_partialReceived.type = NoMessage;
	} while (_socket->bytesAvailable() > 0 && !block);
	// Loop until there are no more messages, or we are blocking and have received one.
}