BluetoothHCICommands.c 13 KB
Newer Older
1
2
/*
             LUFA Library
Dean Camera's avatar
Dean Camera committed
3
     Copyright (C) Dean Camera, 2010.
4
5
6
7
8
9
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
Dean Camera's avatar
Dean Camera committed
10
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
11

12
13
14
15
16
17
18
  Permission to use, copy, modify, distribute, and sell this 
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in 
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting 
  documentation, and that the name of the author not be used in 
  advertising or publicity pertaining to distribution of the 
19
20
21
22
23
24
25
26
27
28
29
30
31
32
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

#include "BluetoothHCICommands.h"

33
static Bluetooth_HCICommand_Header_t HCICommandHeader;
34

35
36
37
       uint8_t                       Bluetooth_HCIProcessingState;
static uint8_t                       Bluetooth_HCINextState;
static uint8_t                       Bluetooth_TempDeviceAddress[6];
38

39
static uint8_t Bluetooth_SendHCICommand(void* Parameters, uint16_t ParameterLength)
40
{
41
	/* Need to reserve the amount of bytes given in the header for the complete payload */
42
43
44
45
	uint8_t CommandBuffer[sizeof(HCICommandHeader) + HCICommandHeader.ParameterLength];

	USB_ControlRequest = (USB_Request_Header_t)
		{
46
47
48
49
50
			.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_DEVICE),
			.bRequest      = 0,
			.wValue        = 0,
			.wIndex        = 0,
			.wLength       = sizeof(CommandBuffer)
51
		};
52
53

	/* Copy over the HCI command header to the allocated buffer */
54
55
	memcpy(CommandBuffer, &HCICommandHeader, sizeof(HCICommandHeader));
	
56
57
	/* Zero out the parameter section of the response to ensure that any padding bytes do not expose private RAM contents */
	memset(&CommandBuffer[sizeof(HCICommandHeader)], 0x00, HCICommandHeader.ParameterLength);
58

59
60
61
62
	/* Copy over the command parameters (if any) to the command buffer - note, the number of actual source parameter bytes
	   may differ to those in the header; any difference in length is filled with 0x00 padding bytes */
	memcpy(&CommandBuffer[sizeof(HCICommandHeader)], Parameters, ParameterLength);
	
63
64
65
66
67
68
69
70
	Pipe_SelectPipe(PIPE_CONTROLPIPE);
	return USB_Host_SendControlRequest(CommandBuffer);
}

void Bluetooth_ProcessHCICommands(void)
{
	switch (Bluetooth_HCIProcessingState)
	{
71
		case Bluetooth_ProcessEvents:
72
			Pipe_SelectPipe(BLUETOOTH_EVENTS_PIPE);
73
74
75
76
			Pipe_Unfreeze();
			
			if (Pipe_IsReadWriteAllowed())
			{
77
78
79
				Bluetooth_HCIEvent_Header_t HCIEventHeader;

				/* Read in the event header to fetch the event code and payload length */
80
81
				Pipe_Read_Stream_LE(&HCIEventHeader, sizeof(HCIEventHeader));
				
82
				/* Create a temporary buffer for the event parameters */
83
84
				uint8_t EventParams[HCIEventHeader.ParameterLength];

85
				/* Read in the event parameters into the temporary buffer */
86
87
88
				Pipe_Read_Stream_LE(&EventParams, HCIEventHeader.ParameterLength);
				Pipe_ClearIN();

89
				BT_HCI_DEBUG("Event Code: 0x%02X", HCIEventHeader.EventCode);
90
91
92
93
94
95
				
				switch (HCIEventHeader.EventCode)
				{
					case EVENT_COMMAND_COMPLETE:
						Bluetooth_HCIProcessingState = Bluetooth_HCINextState;

96
						BT_HCI_DEBUG(">> Command Complete (Opcode 0x%04x)", 
97
98
99
						         ((Bluetooth_HCIEvent_CommandComplete_t*)&EventParams)->Opcode);
						break;
					case EVENT_COMMAND_STATUS:
100
						/* If the execution of a command failed, reset the stack */
101
102
103
						if (((Bluetooth_HCIEvent_CommandStatus_t*)&EventParams)->Status)
						  Bluetooth_HCIProcessingState = Bluetooth_Init;

104
						BT_HCI_DEBUG(">> Command Status: 0x%02X",
105
106
107
						         ((Bluetooth_HCIEvent_CommandStatus_t*)&EventParams)->Status);					
						break;
					case EVENT_CONNECTION_REQUEST:
108
						/* Need to store the remote device's BT address in a temporary buffer for later use */
109
110
111
112
						memcpy(Bluetooth_TempDeviceAddress,
						       &((Bluetooth_HCIEvent_ConnectionRequest_t*)&EventParams)->RemoteAddress,
						       sizeof(Bluetooth_TempDeviceAddress));
					
113
						/* Only accept the connection if it is a ACL (data) connection */
114
115
116
117
						Bluetooth_HCIProcessingState = (Bluetooth_Connection.IsConnected ||
						                               (((Bluetooth_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType != 0x01)) ?
													   Bluetooth_Conn_RejectConnection : Bluetooth_Conn_AcceptConnection;

118
						BT_HCI_DEBUG(">> Connection Request from Device %02X:%02X:%02X:%02X:%02X:%02X",
119
120
121
122
								 Bluetooth_TempDeviceAddress[5], Bluetooth_TempDeviceAddress[4], Bluetooth_TempDeviceAddress[3],
								 Bluetooth_TempDeviceAddress[2], Bluetooth_TempDeviceAddress[1], Bluetooth_TempDeviceAddress[0]);
						break;
					case EVENT_PIN_CODE_REQUEST:
123
						/* Need to store the remote device's BT address in a temporary buffer for later use */
124
125
126
127
128
129
						memcpy(Bluetooth_TempDeviceAddress,
						       &((Bluetooth_HCIEvent_PinCodeRequest_t*)&EventParams)->RemoteAddress,
						       sizeof(Bluetooth_TempDeviceAddress));

						Bluetooth_HCIProcessingState = Bluetooth_Conn_SendPINCode;

130
						BT_HCI_DEBUG(">> PIN Request from Device %02X:%02X:%02X:%02X:%02X:%02X", 
131
132
133
134
								 Bluetooth_TempDeviceAddress[5], Bluetooth_TempDeviceAddress[4], Bluetooth_TempDeviceAddress[3],
								 Bluetooth_TempDeviceAddress[2], Bluetooth_TempDeviceAddress[1], Bluetooth_TempDeviceAddress[0]);
						break;
					case EVENT_CONNECTION_COMPLETE:
135
						/* Need to store the remote device's BT address in a temporary buffer for later use */
136
137
138
139
						memcpy(Bluetooth_Connection.RemoteAddress,
						       &((Bluetooth_HCIEvent_ConnectionComplete_t*)&EventParams)->RemoteAddress,
						       sizeof(Bluetooth_TempDeviceAddress));

140
						/* Store the created connection handle and indicate that the connection has been established */
141
142
143
						Bluetooth_Connection.ConnectionHandle = ((Bluetooth_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle;
						Bluetooth_Connection.IsConnected      = true;

144
						BT_HCI_DEBUG(">> Connection Complete to Device %02X:%02X:%02X:%02X:%02X:%02X, Handle 0x%04x", 
145
146
147
148
149
								 Bluetooth_Connection.RemoteAddress[5], Bluetooth_Connection.RemoteAddress[4],
								 Bluetooth_Connection.RemoteAddress[3], Bluetooth_Connection.RemoteAddress[2],
								 Bluetooth_Connection.RemoteAddress[1], Bluetooth_Connection.RemoteAddress[0],
								 Bluetooth_Connection.ConnectionHandle);
						break;
150
151
152
153
154
155
156
157
					case EVENT_DISCONNECTION_COMPLETE:
						BT_HCI_DEBUG(">> Disconnection Complete", NULL);

						/* Device disconnected, indicate connection information no longer valid */
						Bluetooth_Connection.IsConnected = false;
						
						Bluetooth_HCIProcessingState = Bluetooth_Init;
						break;					
158
159
160
161
				}
			}
			
			Pipe_Freeze();
162
			
163
164
			break;
		case Bluetooth_Init:
165
			/* Reset the connection information structure to destroy any previous connection state */
166
			memset(&Bluetooth_Connection, 0x00, sizeof(Bluetooth_Connection));
167

168
169
170
171
172
173
174
175
176
			Bluetooth_HCIProcessingState = Bluetooth_Init_Reset; 
			break;
		case Bluetooth_Init_Reset:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
			{
				OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_RESET},
				ParameterLength: 0,
			};
			
177
			BT_HCI_DEBUG("Enter State: Bluetooth_Init_Reset", NULL);
178

179
180
			/* Send the command to reset the bluetooth dongle controller */
			Bluetooth_SendHCICommand(NULL, 0);
181
182
183
			
			Bluetooth_HCINextState       = Bluetooth_Init_SetLocalName;
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
184
185
186
187
188
189
190
191
			break;
		case Bluetooth_Init_SetLocalName:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
				{
					OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_LOCAL_NAME},
					ParameterLength: 248,
				};

192
193
			BT_HCI_DEBUG("Enter State: Bluetooth_Init_SetLocalName", NULL);
			BT_HCI_DEBUG("-- Name: %s", Bluetooth_DeviceConfiguration.Name);
194

195
196
			/* Send the command to set the bluetooth dongle's name for other devices to see */
			Bluetooth_SendHCICommand(Bluetooth_DeviceConfiguration.Name, strlen(Bluetooth_DeviceConfiguration.Name));
197

198
199
			Bluetooth_HCINextState       = Bluetooth_Init_SetDeviceClass;
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
200
201
202
203
204
205
206
207
			break;
		case Bluetooth_Init_SetDeviceClass:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
				{
					OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_CLASS_OF_DEVICE},
					ParameterLength: 3,
				};

208
			BT_HCI_DEBUG("Enter State: Bluetooth_Init_SetDeviceClass", NULL);
209

210
211
			/* Send the command to set the class of the device for other devices to see */
			Bluetooth_SendHCICommand(&Bluetooth_DeviceConfiguration.Class, 3);
212

213
214
			Bluetooth_HCINextState       = Bluetooth_Init_WriteScanEnable;
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
215
216
217
218
219
220
221
222
			break;
		case Bluetooth_Init_WriteScanEnable:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
			{
				OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_SCAN_ENABLE},
				ParameterLength: 1,
			};
			
223
			BT_HCI_DEBUG("Enter State: Bluetooth_Init_WriteScanEnable", NULL);
224

225
226
227
228
			uint8_t Interval = BT_SCANMODE_InquiryAndPageScans;
			
			/* Send the command to set the remote device scanning mode */
			Bluetooth_SendHCICommand(&Interval, 1);
229
			
230
231
			Bluetooth_HCINextState       = Bluetooth_ProcessEvents;
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
232
233
234
235
236
			break;
		case Bluetooth_Conn_AcceptConnection:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
				{
					OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_ACCEPT_CONNECTION_REQUEST},
237
					ParameterLength: sizeof(Bluetooth_HCICommand_AcceptConnectionRequest_t),
238
239
				};
			
240
			BT_HCI_DEBUG("Enter State: Bluetooth_Conn_AcceptConnection", NULL);
241

242
243
			/* Copy over the temporary BT device address saved from the Connection Request event, indicate slave
			   connection role */
244
			Bluetooth_HCICommand_AcceptConnectionRequest_t AcceptConnectionParams;
245
246
			memcpy(AcceptConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress,
			       sizeof(AcceptConnectionParams.RemoteAddress));
247
248
			AcceptConnectionParams.SlaveRole = true;

249
250
			/* Send the command to accept the remote connection request */
			Bluetooth_SendHCICommand(&AcceptConnectionParams, sizeof(Bluetooth_HCICommand_AcceptConnectionRequest_t));
251
			
252
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
253
254
255
256
			break;
		case Bluetooth_Conn_RejectConnection:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
				{
257
258
					OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_REJECT_CONNECTION_REQUEST},
					ParameterLength: sizeof(Bluetooth_HCICommand_RejectConnectionRequest_t),
259
260
				};
			
261
			BT_HCI_DEBUG("Enter State: Bluetooth_Conn_RejectConnection", NULL);
262

263
264
			/* Copy over the temporary BT device address saved from the Connection Request event, indicate failure
			   to accept the connection due to limited device resources */
265
266
			Bluetooth_HCICommand_RejectConnectionRequest_t RejectConnectionParams;
			memcpy(RejectConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(RejectConnectionParams.RemoteAddress));
267
268
			RejectConnectionParams.Reason = ERROR_LIMITED_RESOURCES;

269
270
			/* Send the command to reject the remote connection request */
			Bluetooth_SendHCICommand(&RejectConnectionParams, sizeof(Bluetooth_HCICommand_RejectConnectionRequest_t));
271
		
272
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
273
274
275
276
277
			break;
		case Bluetooth_Conn_SendPINCode:
			HCICommandHeader = (Bluetooth_HCICommand_Header_t)
				{
					OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_PIN_CODE_REQUEST_REPLY},
278
					ParameterLength: sizeof(Bluetooth_HCICommand_PinCodeResponse_t),
279
280
				};
			
281
282
			BT_HCI_DEBUG("Enter State: Bluetooth_Conn_SendPINCode", NULL);
			BT_HCI_DEBUG("-- PIN: %s", Bluetooth_DeviceConfiguration.PINCode);
283

284
285
			/* Copy over the temporary BT device address saved from the PIN Code Request event, copy over the
			   local PIN authentication code to the response */
286
			Bluetooth_HCICommand_PinCodeResponse_t PINCodeRequestParams;
287
			memcpy(PINCodeRequestParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(PINCodeRequestParams.RemoteAddress));
288
			PINCodeRequestParams.PINCodeLength = strlen(Bluetooth_DeviceConfiguration.PINCode);
289
			memcpy(PINCodeRequestParams.PINCode, Bluetooth_DeviceConfiguration.PINCode, sizeof(PINCodeRequestParams.PINCode));
290
			
291
292
			/* Send the command to transmit the device's local PIN number for authentication */
			Bluetooth_SendHCICommand(&PINCodeRequestParams, sizeof(Bluetooth_HCICommand_PinCodeResponse_t));
293

294
			Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
295
296
297
			break;
	}
}