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407 lines
16 KiB
407 lines
16 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2012.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Bluetooth HCI layer management code. This module manages the overall
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* Bluetooth stack connection state to and from other devices, processes
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* received events from the Bluetooth controller, and issues commands to
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* modify the controller's configuration, such as the broadcast name of the
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* device.
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*/
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/*
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TODO: Add local to remote device connections
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*/
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#define INCLUDE_FROM_BLUETOOTHHCICOMMANDS_C
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#include "BluetoothHCICommands.h"
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/** Temporary Bluetooth Device Address, for HCI responses which must include the destination address */
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static uint8_t Bluetooth_TempDeviceAddress[6];
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/** Bluetooth HCI processing task. This task should be called repeatedly the main Bluetooth
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* stack task to manage the HCI processing state.
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*/
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void Bluetooth_HCITask(void)
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{
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BT_HCICommand_Header_t HCICommandHeader;
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switch (Bluetooth_State.CurrentHCIState)
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{
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case Bluetooth_ProcessEvents:
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Pipe_SelectPipe(BLUETOOTH_EVENTS_PIPE);
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Pipe_Unfreeze();
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if (Pipe_IsReadWriteAllowed())
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{
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BT_HCIEvent_Header_t HCIEventHeader;
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/* Read in the event header to fetch the event code and payload length */
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Pipe_Read_Stream_LE(&HCIEventHeader, sizeof(HCIEventHeader), NULL);
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/* Create a temporary buffer for the event parameters */
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uint8_t EventParams[HCIEventHeader.ParameterLength];
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/* Read in the event parameters into the temporary buffer */
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Pipe_Read_Stream_LE(&EventParams, HCIEventHeader.ParameterLength, NULL);
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Pipe_ClearIN();
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BT_HCI_DEBUG(1, "Event Received (0x%02X)", HCIEventHeader.EventCode);
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switch (HCIEventHeader.EventCode)
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{
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case EVENT_COMMAND_COMPLETE:
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BT_HCI_DEBUG(1, "<< Command Complete");
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/* Check which operation was completed in case we need to process the even parameters */
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switch (((BT_HCIEvent_CommandComplete_t*)&EventParams)->Opcode)
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{
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case (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBDADDR):
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/* A READ BDADDR command completed, copy over the local device's BDADDR from the response */
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memcpy(Bluetooth_State.LocalBDADDR,
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&((BT_HCIEvent_CommandComplete_t*)&EventParams)->ReturnParams[1],
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sizeof(Bluetooth_State.LocalBDADDR));
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break;
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}
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Bluetooth_State.CurrentHCIState = Bluetooth_State.NextHCIState;
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break;
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case EVENT_COMMAND_STATUS:
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BT_HCI_DEBUG(1, "<< Command Status");
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BT_HCI_DEBUG(2, "-- Status Code: 0x%02X", (((BT_HCIEvent_CommandStatus_t*)&EventParams)->Status));
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/* If the execution of a command failed, reset the stack */
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if (((BT_HCIEvent_CommandStatus_t*)&EventParams)->Status)
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Bluetooth_State.CurrentHCIState = Bluetooth_Init;
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break;
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case EVENT_CONNECTION_REQUEST:
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BT_HCI_DEBUG(1, "<< Connection Request");
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BT_HCI_DEBUG(2, "-- Link Type: 0x%02X", (((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType));
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/* Need to store the remote device's BT address in a temporary buffer for later use */
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memcpy(Bluetooth_TempDeviceAddress,
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&((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->RemoteAddress,
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sizeof(Bluetooth_TempDeviceAddress));
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bool IsACLConnection = (((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType == 0x01);
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/* Only accept the connection if it is a ACL (data) connection, a device is not already connected
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and the user application has indicated that the connection should be allowed */
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Bluetooth_State.CurrentHCIState = (Bluetooth_Connection.IsConnected || !(IsACLConnection) ||
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!(Bluetooth_ConnectionRequest(Bluetooth_TempDeviceAddress))) ?
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Bluetooth_Conn_RejectConnection : Bluetooth_Conn_AcceptConnection;
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BT_HCI_DEBUG(2, "-- Connection %S", (Bluetooth_State.CurrentHCIState == Bluetooth_Conn_RejectConnection) ?
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PSTR("REJECTED") : PSTR("ACCEPTED"));
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break;
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case EVENT_PIN_CODE_REQUEST:
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BT_HCI_DEBUG(1, "<< Pin Code Request");
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/* Need to store the remote device's BT address in a temporary buffer for later use */
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memcpy(Bluetooth_TempDeviceAddress,
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&((BT_HCIEvent_PinCodeReq_t*)&EventParams)->RemoteAddress,
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sizeof(Bluetooth_TempDeviceAddress));
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Bluetooth_State.CurrentHCIState = Bluetooth_Conn_SendPINCode;
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break;
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case EVENT_LINK_KEY_REQUEST:
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BT_HCI_DEBUG(1, "<< Link Key Request");
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/* Need to store the remote device's BT address in a temporary buffer for later use */
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memcpy(Bluetooth_TempDeviceAddress,
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&((BT_HCIEvent_LinkKeyReq_t*)&EventParams)->RemoteAddress,
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sizeof(Bluetooth_TempDeviceAddress));
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Bluetooth_State.CurrentHCIState = Bluetooth_Conn_SendLinkKeyNAK;
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break;
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case EVENT_CONNECTION_COMPLETE:
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BT_HCI_DEBUG(1, "<< Connection Complete");
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BT_HCI_DEBUG(2, "-- Handle: 0x%04X", ((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle);
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/* Need to store the remote device's BT address in a temporary buffer for later use */
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memcpy(Bluetooth_Connection.RemoteAddress,
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&((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->RemoteAddress,
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sizeof(Bluetooth_TempDeviceAddress));
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/* Store the created connection handle and indicate that the connection has been established */
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Bluetooth_Connection.ConnectionHandle = ((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle;
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Bluetooth_Connection.IsConnected = true;
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Bluetooth_ConnectionComplete();
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break;
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case EVENT_DISCONNECTION_COMPLETE:
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BT_HCI_DEBUG(1, "<< Disconnection Complete");
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/* Device disconnected, indicate connection information no longer valid */
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Bluetooth_Connection.IsConnected = false;
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Bluetooth_DisconnectionComplete();
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break;
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}
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}
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Pipe_Freeze();
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break;
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case Bluetooth_Init:
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BT_HCI_DEBUG(1, "# Init");
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Bluetooth_State.IsInitialized = false;
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/* Reset the connection information structure to destroy any previous connection state */
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memset(&Bluetooth_Connection, 0x00, sizeof(Bluetooth_Connection));
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Bluetooth_State.CurrentHCIState = Bluetooth_Init_Reset;
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break;
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case Bluetooth_Init_Reset:
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BT_HCI_DEBUG(1, "# Reset");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_RESET),
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ParameterLength: 0,
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};
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/* Send the command to reset the Bluetooth dongle controller */
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Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
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Bluetooth_State.NextHCIState = Bluetooth_Init_ReadBufferSize;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_ReadBufferSize:
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BT_HCI_DEBUG(1, "# Read Buffer Size");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBUFFERSIZE),
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ParameterLength: 0,
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};
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/* Send the command to read the Bluetooth buffer size (mandatory before device sends any data) */
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Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
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Bluetooth_State.NextHCIState = Bluetooth_Init_GetBDADDR;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_GetBDADDR:
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BT_HCI_DEBUG(1, "# Get BDADDR");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBDADDR),
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ParameterLength: 0,
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};
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/* Send the command to retrieve the BDADDR of the inserted Bluetooth dongle */
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Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
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Bluetooth_State.NextHCIState = Bluetooth_Init_SetLocalName;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_SetLocalName:
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BT_HCI_DEBUG(1, "# Set Local Name");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_LOCAL_NAME),
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ParameterLength: 248,
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};
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/* Send the command to set the Bluetooth dongle's name for other devices to see */
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Bluetooth_SendHCICommand(&HCICommandHeader, Bluetooth_DeviceConfiguration.Name, strlen(Bluetooth_DeviceConfiguration.Name));
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Bluetooth_State.NextHCIState = Bluetooth_Init_SetDeviceClass;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_SetDeviceClass:
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BT_HCI_DEBUG(1, "# Set Device Class");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_CLASS_OF_DEVICE),
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ParameterLength: 3,
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};
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/* Send the command to set the class of the device for other devices to see */
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Bluetooth_SendHCICommand(&HCICommandHeader, &Bluetooth_DeviceConfiguration.Class, 3);
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Bluetooth_State.NextHCIState = Bluetooth_Init_WriteScanEnable;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_WriteScanEnable:
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BT_HCI_DEBUG(1, "# Write Scan Enable");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_SCAN_ENABLE),
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ParameterLength: 1,
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};
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uint8_t Interval = BT_SCANMODE_InquiryAndPageScans;
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/* Send the command to set the remote device scanning mode */
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Bluetooth_SendHCICommand(&HCICommandHeader, &Interval, 1);
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Bluetooth_State.NextHCIState = Bluetooth_Init_FinalizeInit;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Init_FinalizeInit:
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Bluetooth_State.IsInitialized = true;
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/* Fire the user application callback to indicate that the stack is now fully initialized */
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Bluetooth_StackInitialized();
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Bluetooth_State.NextHCIState = Bluetooth_ProcessEvents;
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Conn_AcceptConnection:
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BT_HCI_DEBUG(1, "# Accept Connection");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_ACCEPT_CONNECTION_REQUEST),
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ParameterLength: sizeof(BT_HCICommand_AcceptConnectionReq_t),
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};
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/* Copy over the temporary BT device address saved from the Connection Request event, indicate slave
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connection role */
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BT_HCICommand_AcceptConnectionReq_t AcceptConnectionParams;
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memcpy(AcceptConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress,
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sizeof(AcceptConnectionParams.RemoteAddress));
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AcceptConnectionParams.SlaveRole = true;
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/* Send the command to accept the remote connection request */
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Bluetooth_SendHCICommand(&HCICommandHeader, &AcceptConnectionParams, sizeof(BT_HCICommand_AcceptConnectionReq_t));
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Conn_RejectConnection:
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BT_HCI_DEBUG(1, "# Reject Connection");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_REJECT_CONNECTION_REQUEST),
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ParameterLength: sizeof(BT_HCICommand_RejectConnectionReq_t),
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};
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/* Copy over the temporary BT device address saved from the Connection Request event, indicate failure
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to accept the connection due to limited device resources or incorrect device address */
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BT_HCICommand_RejectConnectionReq_t RejectConnectionParams;
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memcpy(RejectConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(RejectConnectionParams.RemoteAddress));
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RejectConnectionParams.Reason = Bluetooth_Connection.IsConnected ? ERROR_LIMITED_RESOURCES : ERROR_UNACCEPTABLE_BDADDR;
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/* Send the command to reject the remote connection request */
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Bluetooth_SendHCICommand(&HCICommandHeader, &RejectConnectionParams, sizeof(BT_HCICommand_RejectConnectionReq_t));
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Conn_SendPINCode:
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BT_HCI_DEBUG(1, "# Send Pin Code");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_PIN_CODE_REQUEST_REPLY),
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ParameterLength: sizeof(BT_HCICommand_PinCodeResp_t),
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};
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/* Copy over the temporary BT device address saved from the PIN Code Request event, copy over the
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local PIN authentication code to the response */
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BT_HCICommand_PinCodeResp_t PINCodeRequestParams;
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memcpy(PINCodeRequestParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(PINCodeRequestParams.RemoteAddress));
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PINCodeRequestParams.PINCodeLength = strlen(Bluetooth_DeviceConfiguration.PINCode);
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memcpy(PINCodeRequestParams.PINCode, Bluetooth_DeviceConfiguration.PINCode, sizeof(PINCodeRequestParams.PINCode));
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/* Send the command to transmit the device's local PIN number for authentication */
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Bluetooth_SendHCICommand(&HCICommandHeader, &PINCodeRequestParams, sizeof(BT_HCICommand_PinCodeResp_t));
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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case Bluetooth_Conn_SendLinkKeyNAK:
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BT_HCI_DEBUG(1, "# Send Link Key NAK");
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HCICommandHeader = (BT_HCICommand_Header_t)
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{
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OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_LINK_KEY_REQUEST_NEG_REPLY),
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ParameterLength: sizeof(BT_HCICommand_LinkKeyNAKResp_t),
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};
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/* Copy over the temporary BT device address saved from the Link Key Request event */
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BT_HCICommand_LinkKeyNAKResp_t LinkKeyNAKParams;
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memcpy(LinkKeyNAKParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(LinkKeyNAKParams.RemoteAddress));
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/* Send the command to transmit the link key NAK to the receiver */
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Bluetooth_SendHCICommand(&HCICommandHeader, &LinkKeyNAKParams, sizeof(BT_HCICommand_LinkKeyNAKResp_t));
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Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
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break;
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}
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}
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/** Sends a Bluetooth HCI control command to the attached Bluetooth device.
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*
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* \param[in] HCICommandHeader HCI command header to send to the attached device
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* \param[in] Parameters Pointer to the source of the control parameters (if any)
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* \param[in] ParameterLength Length of the parameters to send in bytes
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*
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* \return A value from the USB_Host_SendControlErrorCodes_t enum.
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*/
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static uint8_t Bluetooth_SendHCICommand(const BT_HCICommand_Header_t* const HCICommandHeader,
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const void* Parameters,
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const uint16_t ParameterLength)
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{
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/* Need to reserve the amount of bytes given in the header for the complete payload */
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uint8_t CommandBuffer[sizeof(BT_HCICommand_Header_t) + HCICommandHeader->ParameterLength];
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USB_ControlRequest = (USB_Request_Header_t)
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{
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.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_DEVICE),
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.bRequest = 0,
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.wValue = 0,
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.wIndex = 0,
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.wLength = sizeof(CommandBuffer)
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};
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/* Copy over the HCI command header to the allocated buffer */
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memcpy(CommandBuffer, HCICommandHeader, sizeof(BT_HCICommand_Header_t));
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/* Zero out the parameter section of the response so that all padding bytes are known to be zero */
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memset(&CommandBuffer[sizeof(BT_HCICommand_Header_t)], 0x00, HCICommandHeader->ParameterLength);
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/* Copy over the command parameters (if any) to the command buffer - note, the number of actual source parameter bytes
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may differ to those in the header; any difference in length is filled with 0x00 padding bytes */
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memcpy(&CommandBuffer[sizeof(BT_HCICommand_Header_t)], Parameters, ParameterLength);
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Pipe_SelectPipe(PIPE_CONTROLPIPE);
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return USB_Host_SendControlRequest(CommandBuffer);
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}
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