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/* Copyright (C) 2012 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 : kristianl@tkjelectronics.com
*/
#ifndef _spp_h_
#define _spp_h_
#include "BTD.h"
/* Used for SDP */
#define SDP_SERVICE_SEARCH_ATTRIBUTE_REQUEST_PDU 0x06 // See the RFCOMM specs
#define SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU 0x07 // See the RFCOMM specs
#define SERIALPORT_UUID 0x1101 // See http://www.bluetooth.org/Technical/AssignedNumbers/service_discovery.htm
#define L2CAP_UUID 0x0100
/* Used for RFCOMM */
#define RFCOMM_SABM 0x2F
#define RFCOMM_UA 0x63
#define RFCOMM_UIH 0xEF
//#define RFCOMM_DM 0x0F
#define RFCOMM_DISC 0x43
#define extendAddress 0x01 // Always 1
// Multiplexer message types
#define BT_RFCOMM_PN_CMD 0x83
#define BT_RFCOMM_PN_RSP 0x81
#define BT_RFCOMM_MSC_CMD 0xE3
#define BT_RFCOMM_MSC_RSP 0xE1
#define BT_RFCOMM_RPN_CMD 0x93
#define BT_RFCOMM_RPN_RSP 0x91
/*
#define BT_RFCOMM_TEST_CMD 0x23
#define BT_RFCOMM_TEST_RSP 0x21
#define BT_RFCOMM_FCON_CMD 0xA3
#define BT_RFCOMM_FCON_RSP 0xA1
#define BT_RFCOMM_FCOFF_CMD 0x63
#define BT_RFCOMM_FCOFF_RSP 0x61
#define BT_RFCOMM_RLS_CMD 0x53
#define BT_RFCOMM_RLS_RSP 0x51
#define BT_RFCOMM_NSC_RSP 0x11
*/
/**
* This BluetoothService class implements the Serial Port Protocol (SPP).
* It inherits the Arduino Stream class. This allows it to use all the standard Arduino print and stream functions.
*/
class SPP : public BluetoothService, public Stream {
public:
/**
* Constructor for the SPP class.
* @param p Pointer to BTD class instance.
* @param name Set the name to BTD#btdName. If argument is omitted, then "Arduino" will be used.
* @param pin Write the pin to BTD#btdPin. If argument is omitted, then "0000" will be used.
*/
SPP(BTD *p, const char *name = "Arduino", const char *pin = "0000");
/** @name BluetoothService implementation */
/** Used this to disconnect the virtual serial port. */
void disconnect();
/**@}*/
/**
* Used to provide Boolean tests for the class.
* @return Return true if SPP communication is connected.
*/
operator bool() {
return connected;
}
/** Variable used to indicate if the connection is established. */
bool connected;
/** @name Serial port profile (SPP) Print functions */
/**
* Get number of bytes waiting to be read.
* @return Return the number of bytes ready to be read.
*/
int available(void);
/** Send out all bytes in the buffer. */
void flush(void) {
send();
};
/**
* Used to read the next value in the buffer without advancing to the next one.
* @return Return the byte. Will return -1 if no bytes are available.
*/
int peek(void);
/**
* Used to read the buffer.
* @return Return the byte. Will return -1 if no bytes are available.
*/
int read(void);
#if defined(ARDUINO) && ARDUINO >=100
/**
* Writes the byte to send to a buffer. The message is send when either send() or after Usb.Task() is called.
* @param data The byte to write.
* @return Return the number of bytes written.
*/
size_t write(uint8_t data);
/**
* Writes the bytes to send to a buffer. The message is send when either send() or after Usb.Task() is called.
* @param data The data array to send.
* @param size Size of the data.
* @return Return the number of bytes written.
*/
size_t write(const uint8_t* data, size_t size);
/** Pull in write(const char *str) from Print */
using Print::write;
#else
/**
* Writes the byte to send to a buffer. The message is send when either send() or after Usb.Task() is called.
* @param data The byte to write.
*/
void write(uint8_t data);
/**
* Writes the bytes to send to a buffer. The message is send when either send() or after Usb.Task() is called.
* @param data The data array to send.
* @param size Size of the data.
*/
void write(const uint8_t* data, size_t size);
#endif
/** Discard all the bytes in the buffer. */
void discard(void);
/**
* This will send all the bytes in the buffer.
* This is called whenever Usb.Task() is called,
* but can also be called via this function.
*/
void send(void);
/**@}*/
protected:
/** @name BluetoothService implementation */
/**
* Used to pass acldata to the services.
* @param ACLData Incoming acldata.
*/
void ACLData(uint8_t* ACLData);
/** Used to establish the connection automatically. */
void Run();
/** Use this to reset the service. */
void Reset();
/**
* Called when a device is successfully initialized.
* Use attachOnInit(void (*funcOnInit)(void)) to call your own function.
* This is useful for instance if you want to set the LEDs in a specific way.
*/
void onInit();
/**@}*/
private:
/* Set true when a channel is created */
bool SDPConnected;
bool RFCOMMConnected;
/* Variables used by L2CAP state machines */
uint8_t l2cap_sdp_state;
uint8_t l2cap_rfcomm_state;
uint8_t l2capoutbuf[BULK_MAXPKTSIZE]; // General purpose buffer for l2cap out data
uint8_t rfcommbuf[10]; // Buffer for RFCOMM Commands
/* L2CAP Channels */
uint8_t sdp_scid[2]; // L2CAP source CID for SDP
uint8_t sdp_dcid[2]; // 0x0050
uint8_t rfcomm_scid[2]; // L2CAP source CID for RFCOMM
uint8_t rfcomm_dcid[2]; // 0x0051
/* RFCOMM Variables */
uint8_t rfcommChannel;
uint8_t rfcommChannelConnection; // This is the channel the SPP channel will be running at
uint8_t rfcommDirection;
uint8_t rfcommCommandResponse;
uint8_t rfcommChannelType;
uint8_t rfcommPfBit;
uint32_t timer;
bool waitForLastCommand;
bool creditSent;
uint8_t rfcommDataBuffer[100]; // Create a 100 sized buffer for incoming data
uint8_t sppOutputBuffer[100]; // Create a 100 sized buffer for outgoing SPP data
uint8_t sppIndex;
uint8_t rfcommAvailable;
bool firstMessage; // Used to see if it's the first SDP request received
uint8_t bytesRead; // Counter to see when it's time to send more credit
/* State machines */
void SDP_task(); // SDP state machine
void RFCOMM_task(); // RFCOMM state machine
/* SDP Commands */
void SDP_Command(uint8_t *data, uint8_t nbytes);
void serviceNotSupported(uint8_t transactionIDHigh, uint8_t transactionIDLow);
void serialPortResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow);
void serialPortResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow);
void l2capResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow);
void l2capResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow);
/* RFCOMM Commands */
void RFCOMM_Command(uint8_t *data, uint8_t nbytes);
void sendRfcomm(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t *data, uint8_t length);
void sendRfcommCredit(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t credit);
uint8_t calcFcs(uint8_t *data);
bool checkFcs(uint8_t *data, uint8_t fcs);
uint8_t crc(uint8_t *data);
};
#endif
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