BluetoothStack.c 4.19 KB
 Dean Camera committed May 08, 2010 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 /* LUFA Library Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author disclaim all warranties with regard to this software, including all implied warranties of merchantability and fitness. In no event shall the author be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software. */  Dean Camera committed Jun 04, 2010 31 32 33 34 35 36 /** \file * * Main module for the Bluetooth stack. This module contains the overall Bluetooth * stack state variables and the main Bluetooth stack management functions. */  Dean Camera committed May 08, 2010 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 #include "BluetoothStack.h" /** Bluetooth device connection information structure. Once connected to a remote device, this structure tracks the * connection state of the individual L2CAP channels. */ Bluetooth_Connection_t Bluetooth_Connection = { IsConnected: false }; /** Bluetooth device state information structure. This structure contains details on the current Bluetooth stack * state. */ Bluetooth_Stack_State_t Bluetooth_State = { IsInitialized: false }; /** Bluetooth stack initialization function. This function must be called once to initialize the Bluetooth stack, * ready for connection to remote devices. * * \note This function only begins the initialization process; the stack is initialized as the main Bluetooth stack * management task is repeatedly called. The initialization process ends when the IsInitialized element of the * \ref Bluetooth_State structure becomes true and the \ref Bluetooth_StackInitialized() callback fires. */ void Bluetooth_Stack_Init(void) { /* Reset the HCI state machine - this will eventually reset the adapter and stack when the Bluetooth stack task is called */ Bluetooth_State.CurrentHCIState = Bluetooth_Init; Bluetooth_State.NextHCIState = Bluetooth_Init; } /** Bluetooth stack management task. This task must be repeatedly called to maintain the Bluetooth stack and any connection * to remote Bluetooth devices, including both the HCI control layer and the ACL channel layer. */ void Bluetooth_Stack_USBTask(void) {  Dean Camera committed May 17, 2010 68 69 70  if (USB_HostState != HOST_STATE_Configured) return;  Dean Camera committed May 08, 2010 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86  Bluetooth_HCITask(); Bluetooth_ACLTask(); } /** Retrieves the channel information structure with the given local or remote channel number from the channel list. * * \param[in] SearchValue Value to search for in the channel structure list * \param[in] SearchKey Key to search within the channel structure, a CHANNEL_SEARCH_* mask * * \return Pointer to the matching channel information structure in the channel table if found, NULL otherwise */ Bluetooth_Channel_t* Bluetooth_GetChannelData(const uint16_t SearchValue, const uint8_t SearchKey) { for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) { Bluetooth_Channel_t* ChannelData = &Bluetooth_Connection.Channels[i];  Dean Camera committed Jun 26, 2010 87 88 89 90  /* Closed channels should be ignored as they are not considered valid data */ if (ChannelData->State == BT_Channel_Closed) continue;  Dean Camera committed May 08, 2010 91 92 93  bool FoundMatch = false;  Dean Camera committed Jun 26, 2010 94  /* Search the current channel for the search key to see if it matches */  Dean Camera committed May 08, 2010 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113  switch (SearchKey) { case CHANNEL_SEARCH_LOCALNUMBER: FoundMatch = (SearchValue == ChannelData->LocalNumber); break; case CHANNEL_SEARCH_REMOTENUMBER: FoundMatch = (SearchValue == ChannelData->RemoteNumber); break; case CHANNEL_SEARCH_PSM: FoundMatch = (SearchValue == ChannelData->PSM); break; } if (FoundMatch) return ChannelData; } return NULL; }