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.
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Dean Camera
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13d812a718
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9293de2491
5 changed files with 111 additions and 1 deletions
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@ -213,6 +213,10 @@ void Bluetooth_StackInitialized(void)
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printf_P(PSTR("Stack initialized with local address %02X:%02X:%02X:%02X:%02X:%02X.\r\n"),
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Bluetooth_State.LocalBDADDR[5], Bluetooth_State.LocalBDADDR[4], Bluetooth_State.LocalBDADDR[3],
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Bluetooth_State.LocalBDADDR[2], Bluetooth_State.LocalBDADDR[1], Bluetooth_State.LocalBDADDR[0]);
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/* Reinitialize the services placed on top of the bluetooth stack ready for new connections */
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SDP_Initialize();
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RFCOMM_Initialize();
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}
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/** Bluetooth stack callback event for a Bluetooth connection request. When this callback fires, the
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@ -28,9 +28,76 @@
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this software.
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*/
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#define INCLUDE_FROM_RFCOMM_C
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#include "RFCOMM.h"
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/** 8-Bit CRC table used by the FCS field of each RFCOMM encoded frame, sourced from the ETSI TS 101 369 V7.2.0
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* specification document, upon which the RFCOMM specification is based.
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*/
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const uint8_t CRC8_Table[256] PROGMEM =
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{
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0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
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0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
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0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
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0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
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0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
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0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
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0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
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0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
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0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
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0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
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0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
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0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
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0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
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0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
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0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
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0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
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};
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/** Initializes the RFCOMM service, ready for new connections from a SDP client. */
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void RFCOMM_Initialize(void)
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{
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/* Not currently used */
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}
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void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
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{
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BT_RFCOMM_DEBUG(1, "PACKET RECEIVED");
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RFCOMM_Header_t* FrameHeader = (RFCOMM_Header_t*)Data;
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/* Decode the RFCOMM frame type from the header */
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switch (FrameHeader->FrameType & ~FRAME_POLL_FINAL)
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{
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case RFCOMM_Frame_SABM:
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BT_RFCOMM_DEBUG(1, "<< SABM Received");
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break;
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case RFCOMM_Frame_UA:
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BT_RFCOMM_DEBUG(1, "<< UA Received");
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break;
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case RFCOMM_Frame_DM:
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BT_RFCOMM_DEBUG(1, "<< DM Received");
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break;
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case RFCOMM_Frame_DISC:
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BT_RFCOMM_DEBUG(1, "<< DISC Received");
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break;
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case RFCOMM_Frame_UIH:
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BT_RFCOMM_DEBUG(1, "<< UIH Received");
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break;
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}
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}
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static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos)
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{
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uint8_t FirstOctet = *((uint8_t*)*BufferPos);
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(*BufferPos)++;
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uint8_t SecondOctet = 0;
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if (!(FirstOctet & 0x01))
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{
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SecondOctet = *((uint8_t*)*BufferPos);
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(*BufferPos)++;
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}
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return (((uint16_t)SecondOctet << 7) | (FirstOctet >> 1));
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}
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@ -38,6 +38,7 @@
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/* Includes: */
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdio.h>
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@ -50,8 +51,38 @@
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/* Macros: */
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#define BT_RFCOMM_DEBUG(l, s, ...) do { if (RFCOMM_DEBUG_LEVEL >= l) printf_P(PSTR("(RFCOMM) " s "\r\n"), ##__VA_ARGS__); } while (0)
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#define RFCOMM_DEBUG_LEVEL 2
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#define FRAME_POLL_FINAL (1 << 5)
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/* Enums: */
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enum RFCOMM_Frame_Types_t
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{
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RFCOMM_Frame_SABM = 0x2F, /**< Set Asynchronous Balance Mode Field */
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RFCOMM_Frame_UA = 0x63, /**< Unnumbered Acknowledgement Field */
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RFCOMM_Frame_DM = 0x0F, /**< Disconnected Mode Field */
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RFCOMM_Frame_DISC = 0x43, /**< Disconnect Field */
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RFCOMM_Frame_UIH = 0xEF, /**< Unnumbered Information with Header check Field */
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};
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/* Type Defines: */
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typedef struct
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{
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struct
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{
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unsigned char LogicalChannel : 6;
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unsigned char CommandResponse : 1;
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unsigned char LastAddressOctet : 1;
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} Header;
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uint8_t FrameType;
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} RFCOMM_Header_t;
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/* Function Prototypes: */
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void RFCOMM_Initialize(void);
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void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel);
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#if defined(INCLUDE_FROM_RFCOMM_C)
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static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos);
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#endif
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#endif
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@ -40,6 +40,12 @@ const ServiceAttributeTable_t* SDP_Services_Table[] PROGMEM =
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/** Base UUID value common to all standardized Bluetooth services */
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const UUID_t BaseUUID PROGMEM = {0x00000000, BASE_80BIT_UUID};
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/** Initializes the SDP service, ready for new connections from a SDP client. */
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void SDP_Initialize(void)
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{
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/* Not currently used */
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}
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/** Main Service Discovery Protocol packet processing routine. This function processes incomming SDP packets from
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* a connected Bluetooth device, and sends back appropriate responses to allow other devices to determine the
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* services the local device exposes.
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@ -38,6 +38,7 @@
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/* Includes: */
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdio.h>
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@ -210,6 +211,7 @@
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}
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/* Function Prototypes: */
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void SDP_Initialize(void);
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void SDP_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel);
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#if defined(INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C)
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