-
Notifications
You must be signed in to change notification settings - Fork 786
/
BTHID.cpp
636 lines (588 loc) · 34.5 KB
/
BTHID.cpp
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
/* Copyright (C) 2013 Kristian Lauszus, TKJ Electronics. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Kristian Lauszus, TKJ Electronics
Web : http://www.tkjelectronics.com
e-mail : [email protected]
*/
#include "BTHID.h"
// To enable serial debugging see "settings.h"
//#define EXTRADEBUG // Uncomment to get even more debugging data
//#define PRINTREPORT // Uncomment to print the report send by the HID device
BTHID::BTHID(BTD *p, bool pair, const char *pin) :
BluetoothService(p), // Pointer to USB class instance - mandatory
protocolMode(USB_HID_BOOT_PROTOCOL) {
for(uint8_t i = 0; i < NUM_PARSERS; i++)
pRptParser[i] = NULL;
pBtd->pairWithHIDDevice = pair;
pBtd->btdPin = pin;
/* Set device cid for the control and intterrupt channelse - LSB */
sdp_dcid[0] = 0x50; // 0x0050
sdp_dcid[1] = 0x00;
control_dcid[0] = 0x70; // 0x0070
control_dcid[1] = 0x00;
interrupt_dcid[0] = 0x71; // 0x0071
interrupt_dcid[1] = 0x00;
Reset();
}
void BTHID::Reset() {
connected = false;
activeConnection = false;
SDPConnected = false;
l2cap_event_flag = 0; // Reset flags
l2cap_sdp_state = L2CAP_SDP_WAIT;
l2cap_state = L2CAP_WAIT;
ResetBTHID();
}
void BTHID::disconnect() { // Use this void to disconnect the device
if(SDPConnected)
pBtd->l2cap_disconnection_request(hci_handle, ++identifier, sdp_scid, sdp_dcid);
// First the HID interrupt channel has to be disconnected, then the HID control channel and finally the HCI connection
pBtd->l2cap_disconnection_request(hci_handle, ++identifier, interrupt_scid, interrupt_dcid);
Reset();
l2cap_sdp_state = L2CAP_DISCONNECT_RESPONSE;
l2cap_state = L2CAP_INTERRUPT_DISCONNECT;
}
void BTHID::ACLData(uint8_t* l2capinbuf) {
if(!connected) {
if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_REQUEST) {
if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == SDP_PSM && !pBtd->sdpConnectionClaimed) {
pBtd->sdpConnectionClaimed = true;
hci_handle = pBtd->hci_handle; // Store the HCI Handle for the connection
l2cap_sdp_state = L2CAP_SDP_WAIT; // Reset state
}
}
}
if(!pBtd->l2capConnectionClaimed && pBtd->incomingHIDDevice && !connected && !activeConnection) {
if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_REQUEST) {
if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == HID_CTRL_PSM) {
pBtd->incomingHIDDevice = false;
pBtd->l2capConnectionClaimed = true; // Claim that the incoming connection belongs to this service
activeConnection = true;
hci_handle = pBtd->hci_handle; // Store the HCI Handle for the connection
l2cap_state = L2CAP_WAIT;
}
}
}
if(checkHciHandle(l2capinbuf, hci_handle)) { // acl_handle_ok
if((l2capinbuf[6] | (l2capinbuf[7] << 8)) == 0x0001U) { // l2cap_control - Channel ID for ACL-U
if(l2capinbuf[8] == L2CAP_CMD_COMMAND_REJECT) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nL2CAP Command Rejected - Reason: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[13], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[12], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[17], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[16], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[15], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[14], 0x80);
#endif
} else if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_RESPONSE) {
if(((l2capinbuf[16] | (l2capinbuf[17] << 8)) == 0x0000) && ((l2capinbuf[18] | (l2capinbuf[19] << 8)) == SUCCESSFUL)) { // Success
if(l2capinbuf[14] == sdp_dcid[0] && l2capinbuf[15] == sdp_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP Connection Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
sdp_scid[0] = l2capinbuf[12];
sdp_scid[1] = l2capinbuf[13];
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend SDP Config Request"), 0x80);
#endif
identifier++;
pBtd->l2cap_config_request(hci_handle, identifier, sdp_scid);
} else if(l2capinbuf[14] == control_dcid[0] && l2capinbuf[15] == control_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Control Connection Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
control_scid[0] = l2capinbuf[12];
control_scid[1] = l2capinbuf[13];
l2cap_set_flag(L2CAP_FLAG_CONTROL_CONNECTED);
} else if(l2capinbuf[14] == interrupt_dcid[0] && l2capinbuf[15] == interrupt_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Interrupt Connection Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
interrupt_scid[0] = l2capinbuf[12];
interrupt_scid[1] = l2capinbuf[13];
l2cap_set_flag(L2CAP_FLAG_INTERRUPT_CONNECTED);
}
}
} else if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_REQUEST) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nL2CAP Connection Request - PSM: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[13], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[12], 0x80);
Notify(PSTR(" SCID: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[15], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[14], 0x80);
Notify(PSTR(" Identifier: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[9], 0x80);
#endif
if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == SDP_PSM) {
identifier = l2capinbuf[9];
sdp_scid[0] = l2capinbuf[14];
sdp_scid[1] = l2capinbuf[15];
l2cap_set_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST);
} else if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == HID_CTRL_PSM) {
identifier = l2capinbuf[9];
control_scid[0] = l2capinbuf[14];
control_scid[1] = l2capinbuf[15];
l2cap_set_flag(L2CAP_FLAG_CONNECTION_CONTROL_REQUEST);
} else if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == HID_INTR_PSM) {
identifier = l2capinbuf[9];
interrupt_scid[0] = l2capinbuf[14];
interrupt_scid[1] = l2capinbuf[15];
l2cap_set_flag(L2CAP_FLAG_CONNECTION_INTERRUPT_REQUEST);
}
} else if(l2capinbuf[8] == L2CAP_CMD_CONFIG_RESPONSE) {
if((l2capinbuf[16] | (l2capinbuf[17] << 8)) == 0x0000) { // Success
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP Configuration Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS);
} else if(l2capinbuf[12] == control_dcid[0] && l2capinbuf[13] == control_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Control Configuration Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_CONFIG_CONTROL_SUCCESS);
} else if(l2capinbuf[12] == interrupt_dcid[0] && l2capinbuf[13] == interrupt_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Interrupt Configuration Complete"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_CONFIG_INTERRUPT_SUCCESS);
}
}
} else if(l2capinbuf[8] == L2CAP_CMD_CONFIG_REQUEST) {
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP Configuration Request"), 0x80);
#endif
pBtd->l2cap_config_response(hci_handle, l2capinbuf[9], sdp_scid);
} else if(l2capinbuf[12] == control_dcid[0] && l2capinbuf[13] == control_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Control Configuration Request"), 0x80);
#endif
pBtd->l2cap_config_response(hci_handle, l2capinbuf[9], control_scid);
} else if(l2capinbuf[12] == interrupt_dcid[0] && l2capinbuf[13] == interrupt_dcid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nHID Interrupt Configuration Request"), 0x80);
#endif
pBtd->l2cap_config_response(hci_handle, l2capinbuf[9], interrupt_scid);
}
} else if(l2capinbuf[8] == L2CAP_CMD_DISCONNECT_REQUEST) {
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnect Request: SDP Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST);
} else if(l2capinbuf[12] == control_dcid[0] && l2capinbuf[13] == control_dcid[1]) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnect Request: Control Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
pBtd->l2cap_disconnection_response(hci_handle, identifier, control_dcid, control_scid);
Reset();
} else if(l2capinbuf[12] == interrupt_dcid[0] && l2capinbuf[13] == interrupt_dcid[1]) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnect Request: Interrupt Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
pBtd->l2cap_disconnection_response(hci_handle, identifier, interrupt_dcid, interrupt_scid);
Reset();
}
} else if(l2capinbuf[8] == L2CAP_CMD_DISCONNECT_RESPONSE) {
if(l2capinbuf[12] == sdp_scid[0] && l2capinbuf[13] == sdp_scid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nDisconnect Response: SDP Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_RESPONSE);
} else if(l2capinbuf[12] == control_scid[0] && l2capinbuf[13] == control_scid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nDisconnect Response: Control Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_CONTROL_RESPONSE);
} else if(l2capinbuf[12] == interrupt_scid[0] && l2capinbuf[13] == interrupt_scid[1]) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nDisconnect Response: Interrupt Channel"), 0x80);
#endif
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_INTERRUPT_RESPONSE);
}
} else if(l2capinbuf[8] == L2CAP_CMD_INFORMATION_REQUEST) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nInformation request"), 0x80);
#endif
identifier = l2capinbuf[9];
pBtd->l2cap_information_response(hci_handle, identifier, l2capinbuf[12], l2capinbuf[13]);
}
#ifdef EXTRADEBUG
else {
identifier = l2capinbuf[9];
Notify(PSTR("\r\nL2CAP Unknown Signaling Command: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
}
#endif
} else if(l2capinbuf[6] == sdp_dcid[0] && l2capinbuf[7] == sdp_dcid[1]) { // SDP
if(l2capinbuf[8] == SDP_SERVICE_SEARCH_REQUEST) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP_SERVICE_SEARCH_REQUEST"), 0x80);
#endif
// Send response
l2capoutbuf[0] = SDP_SERVICE_SEARCH_RESPONSE;
l2capoutbuf[1] = l2capinbuf[9];//transactionIDHigh;
l2capoutbuf[2] = l2capinbuf[10];//transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x05; // LSB Parameter Length = 5
l2capoutbuf[5] = 0x00; // MSB TotalServiceRecordCount
l2capoutbuf[6] = 0x00; // LSB TotalServiceRecordCount = 0
l2capoutbuf[7] = 0x00; // MSB CurrentServiceRecordCount
l2capoutbuf[8] = 0x00; // LSB CurrentServiceRecordCount = 0
l2capoutbuf[9] = 0x00; // No continuation state
SDP_Command(l2capoutbuf, 10);
} else if(l2capinbuf[8] == SDP_SERVICE_ATTRIBUTE_REQUEST) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP_SERVICE_ATTRIBUTE_REQUEST"), 0x80);
#endif
// Send response
l2capoutbuf[0] = SDP_SERVICE_ATTRIBUTE_RESPONSE;
l2capoutbuf[1] = l2capinbuf[9];//transactionIDHigh;
l2capoutbuf[2] = l2capinbuf[10];//transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x05; // LSB Parameter Length = 5
l2capoutbuf[5] = 0x00; // MSB AttributeListByteCount
l2capoutbuf[6] = 0x02; // LSB AttributeListByteCount = 2
// TODO: What to send?
l2capoutbuf[7] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[8] = 0x00; // Length = 0
l2capoutbuf[9] = 0x00; // No continuation state
SDP_Command(l2capoutbuf, 10);
} else if(l2capinbuf[8] == SDP_SERVICE_SEARCH_ATTRIBUTE_REQUEST) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSDP_SERVICE_SEARCH_ATTRIBUTE_REQUEST"), 0x80);
Notify(PSTR("\r\nUUID: "), 0x80);
uint16_t uuid;
if((l2capinbuf[16] << 8 | l2capinbuf[17]) == 0x0000) // Check if it's sending the UUID as a 128-bit UUID
uuid = (l2capinbuf[18] << 8 | l2capinbuf[19]);
else // Short UUID
uuid = (l2capinbuf[16] << 8 | l2capinbuf[17]);
D_PrintHex<uint16_t > (uuid, 0x80);
Notify(PSTR("\r\nLength: "), 0x80);
uint16_t length = l2capinbuf[11] << 8 | l2capinbuf[12];
D_PrintHex<uint16_t > (length, 0x80);
Notify(PSTR("\r\nData: "), 0x80);
for(uint8_t i = 0; i < length; i++) {
D_PrintHex<uint8_t > (l2capinbuf[13 + i], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
serviceNotSupported(l2capinbuf[9], l2capinbuf[10]); // The service is not supported
}
#ifdef EXTRADEBUG
else {
Notify(PSTR("\r\nUnknown PDU: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
}
#endif
} else if(l2capinbuf[6] == interrupt_dcid[0] && l2capinbuf[7] == interrupt_dcid[1]) { // l2cap_interrupt
#ifdef PRINTREPORT
Notify(PSTR("\r\nL2CAP Interrupt: "), 0x80);
for(uint16_t i = 0; i < ((uint16_t)l2capinbuf[5] << 8 | l2capinbuf[4]); i++) {
D_PrintHex<uint8_t > (l2capinbuf[i + 8], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
if(l2capinbuf[8] == 0xA1) { // HID BT DATA (0xA0) | Report Type (Input 0x01)
lastBtDataInputIntMillis = (uint32_t)millis(); // Store the timestamp of the report
uint16_t length = ((uint16_t)l2capinbuf[5] << 8 | l2capinbuf[4]);
ParseBTHIDData((uint8_t)(length - 1), &l2capinbuf[9]); // First byte will be the report ID
switch(l2capinbuf[9]) { // Report ID
case 0x01: // Keyboard or Joystick events
if(pRptParser[KEYBOARD_PARSER_ID])
pRptParser[KEYBOARD_PARSER_ID]->Parse(reinterpret_cast<USBHID *>(this), 0, (uint8_t)(length - 2), &l2capinbuf[10]); // Use reinterpret_cast again to extract the instance
break;
case 0x02: // Mouse events
if(pRptParser[MOUSE_PARSER_ID])
pRptParser[MOUSE_PARSER_ID]->Parse(reinterpret_cast<USBHID *>(this), 0, (uint8_t)(length - 2), &l2capinbuf[10]); // Use reinterpret_cast again to extract the instance
break;
#ifdef EXTRADEBUG
default:
Notify(PSTR("\r\nUnknown Report type: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[9], 0x80);
break;
#endif
}
} else {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nUnhandled L2CAP interrupt report: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
#endif
}
} else if(l2capinbuf[6] == control_dcid[0] && l2capinbuf[7] == control_dcid[1]) { // l2cap_control
#ifdef PRINTREPORT
Notify(PSTR("\r\nL2CAP Control: "), 0x80);
for(uint16_t i = 0; i < ((uint16_t)l2capinbuf[5] << 8 | l2capinbuf[4]); i++) {
D_PrintHex<uint8_t > (l2capinbuf[i + 8], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
if(l2capinbuf[8] == 0xA3) { // HID BT DATA (0xA0) | Report Type (Feature 0x03)
uint16_t length = ((uint16_t)l2capinbuf[5] << 8 | l2capinbuf[4]);
ParseBTHIDControlData((uint8_t)(length - 1), &l2capinbuf[9]); // First byte will be the report ID
} else {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nUnhandled L2CAP control report: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
#endif
}
}
#ifdef EXTRADEBUG
else {
Notify(PSTR("\r\nUnsupported L2CAP Data - Channel ID: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[7], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[6], 0x80);
Notify(PSTR("\r\nData: "), 0x80);
Notify(PSTR("\r\n"), 0x80);
for(uint16_t i = 0; i < ((uint16_t)l2capinbuf[5] << 8 | l2capinbuf[4]); i++) {
D_PrintHex<uint8_t > (l2capinbuf[i + 8], 0x80);
Notify(PSTR(" "), 0x80);
}
}
#endif
SDP_task();
L2CAP_task();
}
}
void BTHID::SDP_task() {
switch(l2cap_sdp_state) {
case L2CAP_SDP_WAIT:
if(l2cap_check_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSDP Incoming Connection Request"), 0x80);
#endif
pBtd->l2cap_connection_response(hci_handle, identifier, sdp_dcid, sdp_scid, PENDING);
delay(1);
pBtd->l2cap_connection_response(hci_handle, identifier, sdp_dcid, sdp_scid, SUCCESSFUL);
identifier++;
delay(1);
pBtd->l2cap_config_request(hci_handle, identifier, sdp_scid);
l2cap_sdp_state = L2CAP_SDP_SUCCESS;
} else if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST); // Clear flag
SDPConnected = false;
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected SDP Channel"), 0x80);
#endif
pBtd->l2cap_disconnection_response(hci_handle, identifier, sdp_dcid, sdp_scid);
}
break;
case L2CAP_SDP_SUCCESS:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS)) {
l2cap_clear_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSDP Successfully Configured"), 0x80);
#endif
SDPConnected = true;
l2cap_sdp_state = L2CAP_SDP_WAIT;
}
break;
case L2CAP_DISCONNECT_RESPONSE: // This is for both disconnection response from the RFCOMM and SDP channel if they were connected
if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_RESPONSE)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected L2CAP Connection"), 0x80);
#endif
pBtd->hci_disconnect(hci_handle);
hci_handle = -1; // Reset handle
Reset();
}
break;
}
}
void BTHID::L2CAP_task() {
switch(l2cap_state) {
/* These states are used if the HID device is the host */
case L2CAP_CONTROL_SUCCESS:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_CONTROL_SUCCESS)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nHID Control Successfully Configured"), 0x80);
#endif
setProtocol(); // Set protocol before establishing HID interrupt channel
l2cap_state = L2CAP_INTERRUPT_SETUP;
}
break;
case L2CAP_INTERRUPT_SETUP:
if(l2cap_check_flag(L2CAP_FLAG_CONNECTION_INTERRUPT_REQUEST)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nHID Interrupt Incoming Connection Request"), 0x80);
#endif
pBtd->l2cap_connection_response(hci_handle, identifier, interrupt_dcid, interrupt_scid, PENDING);
delay(1);
pBtd->l2cap_connection_response(hci_handle, identifier, interrupt_dcid, interrupt_scid, SUCCESSFUL);
identifier++;
delay(1);
pBtd->l2cap_config_request(hci_handle, identifier, interrupt_scid);
l2cap_state = L2CAP_INTERRUPT_CONFIG_REQUEST;
}
break;
/* These states are used if the Arduino is the host */
case L2CAP_CONTROL_CONNECT_REQUEST:
if(l2cap_check_flag(L2CAP_FLAG_CONTROL_CONNECTED)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend HID Control Config Request"), 0x80);
#endif
identifier++;
pBtd->l2cap_config_request(hci_handle, identifier, control_scid);
l2cap_state = L2CAP_CONTROL_CONFIG_REQUEST;
}
break;
case L2CAP_CONTROL_CONFIG_REQUEST:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_CONTROL_SUCCESS)) {
setProtocol(); // Set protocol before establishing HID interrupt channel
delay(1); // Short delay between commands - just to be sure
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend HID Interrupt Connection Request"), 0x80);
#endif
identifier++;
pBtd->l2cap_connection_request(hci_handle, identifier, interrupt_dcid, HID_INTR_PSM);
l2cap_state = L2CAP_INTERRUPT_CONNECT_REQUEST;
}
break;
case L2CAP_INTERRUPT_CONNECT_REQUEST:
if(l2cap_check_flag(L2CAP_FLAG_INTERRUPT_CONNECTED)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend HID Interrupt Config Request"), 0x80);
#endif
identifier++;
pBtd->l2cap_config_request(hci_handle, identifier, interrupt_scid);
l2cap_state = L2CAP_INTERRUPT_CONFIG_REQUEST;
}
break;
case L2CAP_INTERRUPT_CONFIG_REQUEST:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_INTERRUPT_SUCCESS)) { // Now the HID channels is established
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nHID Channels Established"), 0x80);
#endif
pBtd->connectToHIDDevice = false;
pBtd->pairWithHIDDevice = false;
connected = true;
onInit();
l2cap_state = L2CAP_DONE;
}
break;
case L2CAP_DONE:
break;
case L2CAP_INTERRUPT_DISCONNECT:
if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_INTERRUPT_RESPONSE)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected Interrupt Channel"), 0x80);
#endif
identifier++;
pBtd->l2cap_disconnection_request(hci_handle, identifier, control_scid, control_dcid);
l2cap_state = L2CAP_CONTROL_DISCONNECT;
}
break;
case L2CAP_CONTROL_DISCONNECT:
if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_CONTROL_RESPONSE)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected Control Channel"), 0x80);
#endif
pBtd->hci_disconnect(hci_handle);
hci_handle = -1; // Reset handle
l2cap_event_flag = 0; // Reset flags
l2cap_state = L2CAP_WAIT;
}
break;
}
}
void BTHID::Run() {
switch(l2cap_state) {
case L2CAP_WAIT:
if(pBtd->connectToHIDDevice && !pBtd->l2capConnectionClaimed && !connected && !activeConnection) {
pBtd->l2capConnectionClaimed = true;
activeConnection = true;
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend HID Control Connection Request"), 0x80);
#endif
hci_handle = pBtd->hci_handle; // Store the HCI Handle for the connection
l2cap_event_flag = 0; // Reset flags
identifier = 0;
pBtd->l2cap_connection_request(hci_handle, identifier, control_dcid, HID_CTRL_PSM);
l2cap_state = L2CAP_CONTROL_CONNECT_REQUEST;
} else if(l2cap_check_flag(L2CAP_FLAG_CONNECTION_CONTROL_REQUEST)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nHID Control Incoming Connection Request"), 0x80);
#endif
pBtd->l2cap_connection_response(hci_handle, identifier, control_dcid, control_scid, PENDING);
delay(1);
pBtd->l2cap_connection_response(hci_handle, identifier, control_dcid, control_scid, SUCCESSFUL);
identifier++;
delay(1);
pBtd->l2cap_config_request(hci_handle, identifier, control_scid);
l2cap_state = L2CAP_CONTROL_SUCCESS;
}
break;
}
}
void BTHID::SDP_Command(uint8_t* data, uint8_t nbytes) { // See page 223 in the Bluetooth specs
pBtd->L2CAP_Command(hci_handle, data, nbytes, sdp_scid[0], sdp_scid[1]);
}
void BTHID::serviceNotSupported(uint8_t transactionIDHigh, uint8_t transactionIDLow) { // See page 235 in the Bluetooth specs
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE;
l2capoutbuf[1] = transactionIDHigh;
l2capoutbuf[2] = transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x05; // LSB Parameter Length = 5
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
l2capoutbuf[6] = 0x02; // LSB AttributeListsByteCount = 2
/* Attribute ID/Value Sequence: */
l2capoutbuf[7] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[8] = 0x00; // Length = 0
l2capoutbuf[9] = 0x00; // No continuation state
SDP_Command(l2capoutbuf, 10);
}
/************************************************************/
/* HID Commands */
/************************************************************/
void BTHID::setProtocol() {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSet protocol mode: "), 0x80);
D_PrintHex<uint8_t > (protocolMode, 0x80);
#endif
if (protocolMode != USB_HID_BOOT_PROTOCOL && protocolMode != HID_RPT_PROTOCOL) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nNot a valid protocol mode. Using Boot protocol instead."), 0x80);
#endif
protocolMode = USB_HID_BOOT_PROTOCOL; // Use Boot Protocol by default
}
uint8_t command = 0x70 | protocolMode; // Set Protocol, see Bluetooth HID specs page 33
pBtd->L2CAP_Command(hci_handle, &command, 1, control_scid[0], control_scid[1]);
}
void BTHID::setLeds(uint8_t data) {
uint8_t buf[3];
buf[0] = 0xA2; // HID BT DATA_request (0xA0) | Report Type (Output 0x02)
buf[1] = 0x01; // Report ID
buf[2] = data;
pBtd->L2CAP_Command(hci_handle, buf, 3, interrupt_scid[0], interrupt_scid[1]);
}