USB Host Shield 2.0
SPP.h
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1 /* Copyright (C) 2012 Kristian Lauszus, TKJ Electronics. All rights reserved.
2 
3  This software may be distributed and modified under the terms of the GNU
4  General Public License version 2 (GPL2) as published by the Free Software
5  Foundation and appearing in the file GPL2.TXT included in the packaging of
6  this file. Please note that GPL2 Section 2[b] requires that all works based
7  on this software must also be made publicly available under the terms of
8  the GPL2 ("Copyleft").
9 
10  Contact information
11  -------------------
12 
13  Kristian Lauszus, TKJ Electronics
14  Web : http://www.tkjelectronics.com
15  e-mail : kristianl@tkjelectronics.com
16  */
17 
18 #ifndef _spp_h_
19 #define _spp_h_
20 
21 #include "BTD.h"
22 
23 /* Used for RFCOMM */
24 #define RFCOMM_SABM 0x2F
25 #define RFCOMM_UA 0x63
26 #define RFCOMM_UIH 0xEF
27 //#define RFCOMM_DM 0x0F
28 #define RFCOMM_DISC 0x43
29 
30 #define extendAddress 0x01 // Always 1
31 
32 // Multiplexer message types
33 #define BT_RFCOMM_PN_CMD 0x83
34 #define BT_RFCOMM_PN_RSP 0x81
35 #define BT_RFCOMM_MSC_CMD 0xE3
36 #define BT_RFCOMM_MSC_RSP 0xE1
37 #define BT_RFCOMM_RPN_CMD 0x93
38 #define BT_RFCOMM_RPN_RSP 0x91
39 /*
40 #define BT_RFCOMM_TEST_CMD 0x23
41 #define BT_RFCOMM_TEST_RSP 0x21
42 #define BT_RFCOMM_FCON_CMD 0xA3
43 #define BT_RFCOMM_FCON_RSP 0xA1
44 #define BT_RFCOMM_FCOFF_CMD 0x63
45 #define BT_RFCOMM_FCOFF_RSP 0x61
46 #define BT_RFCOMM_RLS_CMD 0x53
47 #define BT_RFCOMM_RLS_RSP 0x51
48 #define BT_RFCOMM_NSC_RSP 0x11
49  */
50 
55 class SPP : public BluetoothService, public Stream {
56 public:
63  SPP(BTD *p, const char *name = "Arduino", const char *pin = "0000");
64 
67  void disconnect();
74  operator bool() {
75  return connected;
76  }
78  bool connected;
79 
85  int available(void);
86 
88  void flush(void) {
89  send();
90  };
95  int peek(void);
100  int read(void);
101 
102 #if defined(ARDUINO) && ARDUINO >=100
108  size_t write(uint8_t data);
115  size_t write(const uint8_t* data, size_t size);
117 #if !defined(RBL_NRF51822) && !defined(NRF52_SERIES)
118  using Print::write;
119 #endif
120 #else
125  void write(uint8_t data);
131  void write(const uint8_t* data, size_t size);
132 #endif
133 
135  void discard(void);
141  void send(void);
144 protected:
150  void ACLData(uint8_t* ACLData);
152  void Run();
154  void Reset();
160  void onInit();
163 private:
164  /* Set true when a channel is created */
165  bool SDPConnected;
166  bool RFCOMMConnected;
167 
168  /* Variables used by L2CAP state machines */
169  uint8_t l2cap_sdp_state;
170  uint8_t l2cap_rfcomm_state;
171 
172  uint8_t l2capoutbuf[BULK_MAXPKTSIZE]; // General purpose buffer for l2cap out data
173  uint8_t rfcommbuf[10]; // Buffer for RFCOMM Commands
174 
175  /* L2CAP Channels */
176  uint8_t sdp_scid[2]; // L2CAP source CID for SDP
177  uint8_t sdp_dcid[2]; // 0x0050
178  uint8_t rfcomm_scid[2]; // L2CAP source CID for RFCOMM
179  uint8_t rfcomm_dcid[2]; // 0x0051
180 
181  /* RFCOMM Variables */
182  uint8_t rfcommChannel;
183  uint8_t rfcommChannelConnection; // This is the channel the SPP channel will be running at
184  uint8_t rfcommDirection;
185  uint8_t rfcommCommandResponse;
186  uint8_t rfcommChannelType;
187  uint8_t rfcommPfBit;
188 
189  uint32_t timer;
190  bool waitForLastCommand;
191  bool creditSent;
192 
193  uint8_t rfcommDataBuffer[100]; // Create a 100 sized buffer for incoming data
194  uint8_t sppOutputBuffer[100]; // Create a 100 sized buffer for outgoing SPP data
195  uint8_t sppIndex;
196  uint8_t rfcommAvailable;
197 
198  bool firstMessage; // Used to see if it's the first SDP request received
199  uint8_t bytesRead; // Counter to see when it's time to send more credit
200 
201  /* State machines */
202  void SDP_task(); // SDP state machine
203  void RFCOMM_task(); // RFCOMM state machine
204 
205  /* SDP Commands */
206  void SDP_Command(uint8_t *data, uint8_t nbytes);
207  void serviceNotSupported(uint8_t transactionIDHigh, uint8_t transactionIDLow);
208  void serialPortResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow);
209  void serialPortResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow);
210  void l2capResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow);
211  void l2capResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow);
212 
213  /* RFCOMM Commands */
214  void RFCOMM_Command(uint8_t *data, uint8_t nbytes);
215  void sendRfcomm(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t *data, uint8_t length);
216  void sendRfcommCredit(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t credit);
217  uint8_t calcFcs(uint8_t *data);
218  bool checkFcs(uint8_t *data, uint8_t fcs);
219  uint8_t crc(uint8_t *data);
220 };
221 #endif
#define BULK_MAXPKTSIZE
Definition: BTD.h:37
Definition: BTD.h:222
Definition: SPP.h:55
void flush(void)
Definition: SPP.h:88
void disconnect()
Definition: SPP.cpp:72
void Run()
Definition: SPP.cpp:423
int peek(void)
Definition: SPP.cpp:805
void discard(void)
Definition: SPP.cpp:801
SPP(BTD *p, const char *name="Arduino", const char *pin="0000")
Definition: SPP.cpp:45
size_t write(uint8_t data)
Definition: SPP.cpp:742
int available(void)
Definition: SPP.cpp:797
int read(void)
Definition: SPP.cpp:811
void send(void)
Definition: SPP.cpp:769
void ACLData(uint8_t *ACLData)
Definition: SPP.cpp:84
bool connected
Definition: SPP.h:78
void Reset()
Definition: SPP.cpp:60
void onInit()
Definition: SPP.cpp:433