From 9293de249151fb974325ebf8f39b28e0f32524ea Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Thu, 3 Jun 2010 12:45:15 +0000 Subject: Start implementation of RFCOMM decoding layer. Add new service initialize routines for each Bluetooth service - currently unused, but will eventually reset the service state of RFCOMM when a new connection is made. --- Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c | 69 +++++++++++++++++++++- Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h | 31 ++++++++++ .../BluetoothHost/Lib/ServiceDiscoveryProtocol.c | 6 ++ .../BluetoothHost/Lib/ServiceDiscoveryProtocol.h | 2 + 4 files changed, 107 insertions(+), 1 deletion(-) (limited to 'Demos/Host/Incomplete/BluetoothHost/Lib') diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c index 052bf3fdb..2d880771f 100644 --- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c +++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c @@ -28,9 +28,76 @@ this software. */ +#define INCLUDE_FROM_RFCOMM_C #include "RFCOMM.h" +/** 8-Bit CRC table used by the FCS field of each RFCOMM encoded frame, sourced from the ETSI TS 101 369 V7.2.0 + * specification document, upon which the RFCOMM specification is based. + */ +const uint8_t CRC8_Table[256] PROGMEM = + { + 0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B, + 0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67, + 0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43, + 0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F, + 0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B, + 0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17, + 0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33, + 0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F, + 0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B, + 0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87, + 0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3, + 0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF, + 0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB, + 0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7, + 0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3, + 0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF + }; + +/** Initializes the RFCOMM service, ready for new connections from a SDP client. */ +void RFCOMM_Initialize(void) +{ + /* Not currently used */ +} + void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel) { - BT_RFCOMM_DEBUG(1, "PACKET RECEIVED"); + RFCOMM_Header_t* FrameHeader = (RFCOMM_Header_t*)Data; + + /* Decode the RFCOMM frame type from the header */ + switch (FrameHeader->FrameType & ~FRAME_POLL_FINAL) + { + case RFCOMM_Frame_SABM: + BT_RFCOMM_DEBUG(1, "<< SABM Received"); + break; + case RFCOMM_Frame_UA: + BT_RFCOMM_DEBUG(1, "<< UA Received"); + break; + case RFCOMM_Frame_DM: + BT_RFCOMM_DEBUG(1, "<< DM Received"); + break; + case RFCOMM_Frame_DISC: + BT_RFCOMM_DEBUG(1, "<< DISC Received"); + break; + case RFCOMM_Frame_UIH: + BT_RFCOMM_DEBUG(1, "<< UIH Received"); + break; + } } + +static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos) +{ + uint8_t FirstOctet = *((uint8_t*)*BufferPos); + (*BufferPos)++; + + uint8_t SecondOctet = 0; + + if (!(FirstOctet & 0x01)) + { + SecondOctet = *((uint8_t*)*BufferPos); + (*BufferPos)++; + } + + return (((uint16_t)SecondOctet << 7) | (FirstOctet >> 1)); +} + diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h index 7f1b6269a..ff04ed5a9 100644 --- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h +++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h @@ -38,6 +38,7 @@ /* Includes: */ #include + #include #include #include #include @@ -50,8 +51,38 @@ /* Macros: */ #define BT_RFCOMM_DEBUG(l, s, ...) do { if (RFCOMM_DEBUG_LEVEL >= l) printf_P(PSTR("(RFCOMM) " s "\r\n"), ##__VA_ARGS__); } while (0) #define RFCOMM_DEBUG_LEVEL 2 + + #define FRAME_POLL_FINAL (1 << 5) + + /* Enums: */ + enum RFCOMM_Frame_Types_t + { + RFCOMM_Frame_SABM = 0x2F, /**< Set Asynchronous Balance Mode Field */ + RFCOMM_Frame_UA = 0x63, /**< Unnumbered Acknowledgement Field */ + RFCOMM_Frame_DM = 0x0F, /**< Disconnected Mode Field */ + RFCOMM_Frame_DISC = 0x43, /**< Disconnect Field */ + RFCOMM_Frame_UIH = 0xEF, /**< Unnumbered Information with Header check Field */ + }; + + /* Type Defines: */ + typedef struct + { + struct + { + unsigned char LogicalChannel : 6; + unsigned char CommandResponse : 1; + unsigned char LastAddressOctet : 1; + } Header; + + uint8_t FrameType; + } RFCOMM_Header_t; /* Function Prototypes: */ + void RFCOMM_Initialize(void); void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel); + #if defined(INCLUDE_FROM_RFCOMM_C) + static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos); + #endif + #endif diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c index 62d4c5e39..c07718e78 100644 --- a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c +++ b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c @@ -40,6 +40,12 @@ const ServiceAttributeTable_t* SDP_Services_Table[] PROGMEM = /** Base UUID value common to all standardized Bluetooth services */ const UUID_t BaseUUID PROGMEM = {0x00000000, BASE_80BIT_UUID}; +/** Initializes the SDP service, ready for new connections from a SDP client. */ +void SDP_Initialize(void) +{ + /* Not currently used */ +} + /** Main Service Discovery Protocol packet processing routine. This function processes incomming SDP packets from * a connected Bluetooth device, and sends back appropriate responses to allow other devices to determine the * services the local device exposes. diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.h b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.h index 0010cf1ff..18592ec1c 100644 --- a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.h +++ b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.h @@ -38,6 +38,7 @@ /* Includes: */ #include + #include #include #include #include @@ -210,6 +211,7 @@ } /* Function Prototypes: */ + void SDP_Initialize(void); void SDP_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel); #if defined(INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C) -- cgit v1.2.3