/* 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"); /** * 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 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(); /** Used this to disconnect the virtual serial port. */ void disconnect(); /**@}*/ /** @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. */ virtual 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); /**@}*/ private: /* Bluetooth dongle library pointer */ BTD *pBtd; /* Set true when a channel is created */ bool SDPConnected; bool RFCOMMConnected; uint16_t hci_handle; // The HCI Handle for the connection /* Variables used by L2CAP state machines */ uint8_t l2cap_sdp_state; uint8_t l2cap_rfcomm_state; uint32_t l2cap_event_flag; // l2cap flags of received Bluetooth events 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 uint8_t identifier; // Identifier for command /* 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; unsigned long 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