Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothStack.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 #include "BluetoothStack.h"
  32
  33 /** Bluetooth device connection information structure. Once connected to a remote device, this structure tracks the
  34  *  connection state of the individual L2CAP channels.
  35  */
  36 Bluetooth_Connection_t Bluetooth_Connection = { IsConnected: false };
  37
  38 /** Bluetooth device state information structure. This structure contains details on the current Bluetooth stack
  39  *  state.
  40  */
  41 Bluetooth_Stack_State_t Bluetooth_State     = { IsInitialized: false };
  42
  43 /** Bluetooth stack initialization function. This function must be called once to initialize the Bluetooth stack,
  44  *  ready for connection to remote devices.
  45  *
  46  *  \note This function only begins the initialization process; the stack is initialized as the main Bluetooth stack
  47  *        management task is repeatedly called. The initialization process ends when the IsInitialized element of the
  48  *        \ref Bluetooth_State structure becomes true and the \ref Bluetooth_StackInitialized() callback fires.
  49  */
  50 void Bluetooth_Stack_Init(void)
  51 {
  52         /* Reset the HCI state machine - this will eventually reset the adapter and stack when the Bluetooth stack task is called */
  53         Bluetooth_State.CurrentHCIState = Bluetooth_Init;
  54         Bluetooth_State.NextHCIState    = Bluetooth_Init;
  55 }
  56
  57 /** Bluetooth stack management task. This task must be repeatedly called to maintain the Bluetooth stack and any connection
  58  *  to remote Bluetooth devices, including both the HCI control layer and the ACL channel layer.
  59  */
  60 void Bluetooth_Stack_USBTask(void)
  61 {
  62         if (USB_HostState != HOST_STATE_Configured)
  63           return;
  64
  65         Bluetooth_HCITask();
  66         Bluetooth_ACLTask();
  67 }
  68
  69 /** Retrieves the channel information structure with the given local or remote channel number from the channel list.
  70  *
  71  *  \param[in] SearchValue  Value to search for in the channel structure list
  72  *  \param[in] SearchKey    Key to search within the channel structure, a CHANNEL_SEARCH_* mask
  73  *
  74  *  \return Pointer to the matching channel information structure in the channel table if found, NULL otherwise
  75  */
  76 Bluetooth_Channel_t* Bluetooth_GetChannelData(const uint16_t SearchValue, const uint8_t SearchKey)
  77 {
  78         for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++)
  79         {
  80                 Bluetooth_Channel_t* ChannelData = &Bluetooth_Connection.Channels[i];
  81
  82                 bool FoundMatch = false;
  83
  84                 switch (SearchKey)
  85                 {
  86                         case CHANNEL_SEARCH_LOCALNUMBER:
  87                                 FoundMatch = (SearchValue == ChannelData->LocalNumber);
  88                                 break;
  89                         case CHANNEL_SEARCH_REMOTENUMBER:
  90                                 FoundMatch = (SearchValue == ChannelData->RemoteNumber);
  91                                 break;
  92                         case CHANNEL_SEARCH_PSM:
  93                                 FoundMatch = (SearchValue == ChannelData->PSM);
  94                                 break;
  95                 }
  96
  97                 if (FoundMatch)
  98                   return ChannelData;
  99         }
 100
 101         return NULL;
 102 }