Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #define  INCLUDE_FROM_RFCOMM_C
  32 #include "RFCOMM.h"
  33
  34 /** 8-Bit CRC table used by the FCS field of each RFCOMM encoded frame, sourced from the ETSI TS 101 369 V7.2.0
  35  *  specification document, upon which the RFCOMM specification is based.
  36  */
  37 const uint8_t CRC8_Table[256] PROGMEM =
  38         {
  39                 0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
  40                 0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
  41                 0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
  42                 0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
  43                 0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
  44                 0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
  45                 0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
  46                 0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
  47                 0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
  48                 0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
  49                 0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
  50                 0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
  51                 0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
  52                 0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
  53                 0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
  54                 0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
  55         };
  56
  57 /** Initializes the RFCOMM service, ready for new connections from a SDP client. */
  58 void RFCOMM_Initialize(void)
  59 {
  60         /* Not currently used */
  61 }
  62
  63 void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
  64 {
  65         RFCOMM_Header_t* FrameHeader = (RFCOMM_Header_t*)Data;
  66
  67         /* Decode the RFCOMM frame type from the header */
  68         switch (FrameHeader->FrameType & ~FRAME_POLL_FINAL)
  69         {
  70                 case RFCOMM_Frame_SABM:
  71                         BT_RFCOMM_DEBUG(1, "<< SABM Received");
  72                         break;
  73                 case RFCOMM_Frame_UA:
  74                         BT_RFCOMM_DEBUG(1, "<< UA Received");
  75                         break;
  76                 case RFCOMM_Frame_DM:
  77                         BT_RFCOMM_DEBUG(1, "<< DM Received");
  78                         break;
  79                 case RFCOMM_Frame_DISC:
  80                         BT_RFCOMM_DEBUG(1, "<< DISC Received");
  81                         break;
  82                 case RFCOMM_Frame_UIH:
  83                         BT_RFCOMM_DEBUG(1, "<< UIH Received");
  84                         break;
  85         }
  86 }
  87
  88 static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos)
  89 {
  90         uint8_t FirstOctet = *((uint8_t*)*BufferPos);
  91         (*BufferPos)++;
  92
  93         uint8_t SecondOctet = 0;
  94
  95         if (!(FirstOctet & 0x01))
  96         {
  97                 SecondOctet = *((uint8_t*)*BufferPos);
  98                 (*BufferPos)++;
  99         }
 100
 101         return (((uint16_t)SecondOctet << 7) | (FirstOctet >> 1));
 102 }
 103