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Document Bluetooth files with overall file Doxygen comments. Add more initial RFCOMM layer code to receive and respond to SABM packets.

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pull/1469/head
Dean Camera 15 years ago
parent be09f64872
commit efbedcfa54
7 changed files with 133 additions and 23 deletions
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7
Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c
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@ -28,6 +28,13 @@
this software.
*/
/** \file
*
* Bluetooth L2CAP layer management code. This module managed the creation,
* configuration and teardown of L2CAP channels, and manages packet reception
* and sending to and from other Bluetooth devices.
*/
/*
TODO: Make SendPacket respect receiver's MTU
TODO: Make ReceivePacket stitch together MTU fragments (?)

9
Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothHCICommands.c
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@ -28,6 +28,15 @@
this software.
*/
/** \file
*
* Bluetooth HCI layer management code. This module manages the overall
* Bluetooth stack connection state to and from other devices, processes
* received events from the Bluetooth controller, and issues commands to
* modify the controller's configuration, such as the broadcast name of the
* device.
*/
/*
TODO: Add local to remote device connections
*/

6
Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothStack.c
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@ -28,6 +28,12 @@
this software.
*/
/** \file
*
* Main module for the Bluetooth stack. This module contains the overall Bluetooth
* stack state variables and the main Bluetooth stack management functions.
*/
#include "BluetoothStack.h"
/** Bluetooth device connection information structure. Once connected to a remote device, this structure tracks the

79
Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
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@ -28,6 +28,13 @@
this software.
*/
/** \file
*
* RFCOMM layer module. This module manages the RFCOMM layer of the
* stack, providing virtual serial port channels on top of the lower
* L2CAP layer.
*/
#define INCLUDE_FROM_RFCOMM_C
#include "RFCOMM.h"
@ -62,10 +69,10 @@ void RFCOMM_Initialize(void)
void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
{
RFCOMM_Header_t* FrameHeader = (RFCOMM_Header_t*)Data;
const RFCOMM_Header_t* FrameHeader = (const RFCOMM_Header_t*)Data;
/* Decode the RFCOMM frame type from the header */
switch (FrameHeader->FrameType & ~FRAME_POLL_FINAL)
switch (FrameHeader->Control & ~FRAME_POLL_FINAL)
{
case RFCOMM_Frame_SABM:
RFCOMM_ProcessSABM(FrameHeader, Channel);
@ -82,54 +89,94 @@ void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
case RFCOMM_Frame_UIH:
RFCOMM_ProcessUIH(FrameHeader, Channel);
break;
default:
BT_RFCOMM_DEBUG(1, "<< Unknown Frame Type");
break;
}
}
static void RFCOMM_ProcessSABM(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
{
uint8_t* CurrBufferPos = ((uint8_t*)FrameHeader + sizeof(RFCOMM_Header_t));
uint16_t DataLen = RFCOMM_GetFrameDataLength(&CurrBufferPos);
BT_RFCOMM_DEBUG(1, "<< SABM Received");
BT_RFCOMM_DEBUG(2, "-- Data Length 0x%04X", DataLen);
BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
// TODO: Reset channel send/receive state here
struct
{
RFCOMM_Header_t FrameHeader;
uint8_t FrameLength;
uint8_t FCS;
} ResponsePacket;
/* Copy over the same frame header as the sent packet to copy the logical RFCOMM channel address */
ResponsePacket.FrameHeader.Address = FrameHeader->Address;
/* Set the frame type to an Unnumbered Acknowledgement to acknowledge the SABM request */
ResponsePacket.FrameHeader.Control = RFCOMM_Frame_UA;
/* Set the length to 0 (LSB indicates end of 8-bit length field) */
ResponsePacket.FrameLength = 0x01;
/* Calculate the frame checksum from all fields except the FCS field itself */
ResponsePacket.FCS = RFCOMM_GetFCSValue(&ResponsePacket, sizeof(ResponsePacket) - sizeof(ResponsePacket.FCS));
BT_RFCOMM_DEBUG(1, ">> UA Sent");
for (uint16_t i = 0; i < DataLen; i++)
printf("0x%02X ", CurrBufferPos[i]);
printf("\r\n");
/* Send the completed response packet to the sender */
Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), Channel);
}
static void RFCOMM_ProcessUA(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
{
const uint8_t* CurrBufferPos = ((const uint8_t*)FrameHeader + sizeof(RFCOMM_Header_t));
BT_RFCOMM_DEBUG(1, "<< UA Received");
BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
}
static void RFCOMM_ProcessDM(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
{
const uint8_t* CurrBufferPos = ((const uint8_t*)FrameHeader + sizeof(RFCOMM_Header_t));
BT_RFCOMM_DEBUG(1, "<< DM Received");
BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
}
static void RFCOMM_ProcessDISC(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
{
const uint8_t* CurrBufferPos = ((const uint8_t*)FrameHeader + sizeof(RFCOMM_Header_t));
BT_RFCOMM_DEBUG(1, "<< DISC Received");
BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
}
static void RFCOMM_ProcessUIH(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
{
const uint8_t* CurrBufferPos = ((const uint8_t*)FrameHeader + sizeof(RFCOMM_Header_t));
BT_RFCOMM_DEBUG(1, "<< UIH Received");
BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
}
static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos)
static uint8_t RFCOMM_GetFCSValue(const void* FrameStart, uint16_t Length)
{
uint8_t FirstOctet = *((uint8_t*)*BufferPos);
(*BufferPos)++;
const uint8_t* CurrPos = FrameStart;
uint8_t FCS = 0xFF;
while (Length--)
FCS = pgm_read_byte(CRC8_Table[FCS ^ *(CurrPos++)]);
return ~FCS;
}
static uint16_t RFCOMM_GetFrameDataLength(const uint8_t** BufferPos)
{
uint8_t FirstOctet = *((*BufferPos)++);
uint8_t SecondOctet = 0;
if (!(FirstOctet & 0x01))
{
SecondOctet = *((uint8_t*)*BufferPos);
(*BufferPos)++;
}
SecondOctet = *((*BufferPos)++);
return (((uint16_t)SecondOctet << 7) | (FirstOctet >> 1));
}

9
Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h
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@ -52,7 +52,7 @@
#define BT_RFCOMM_DEBUG(l, s, ...) do { if (RFCOMM_DEBUG_LEVEL >= l) printf_P(PSTR("(RFCOMM) " s "\r\n"), ##__VA_ARGS__); } while (0)
#define RFCOMM_DEBUG_LEVEL 2
#define FRAME_POLL_FINAL (1 << 5)
#define FRAME_POLL_FINAL (1 << 4)
/* Enums: */
/** Enum for the types of RFCOMM frames which can be exchanged on a Bluetooth channel. */
@ -73,9 +73,9 @@
unsigned char LogicalChannel : 6;
unsigned char PollResponse : 1;
unsigned char LastAddressOctet : 1;
} Header;
} Address;
uint8_t FrameType;
uint8_t Control;
} RFCOMM_Header_t;
/* Function Prototypes: */
@ -89,7 +89,8 @@
static void RFCOMM_ProcessDISC(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel);
static void RFCOMM_ProcessUIH(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel);
static uint16_t RFCOMM_GetFrameDataLength(void** BufferPos);
static uint8_t RFCOMM_GetFCSValue(const void* FrameStart, uint16_t Length);
static uint16_t RFCOMM_GetFrameDataLength(const uint8_t** BufferPos);
#endif
#endif

37
Demos/Host/Incomplete/BluetoothHost/Lib/SDPServices.c
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@ -28,8 +28,19 @@
this software.
*/
/** \file
*
* SDP Service Attribute definitions. This file contains the attributes
* and attribute tables of all the services the device supports, which can
* then be retrieved by a connected Bluetooth device via the SDP server.
*/
#include "SDPServices.h"
/** Serial Port Profile attribute, listing the unique service handle of the Serial Port service
* within the device. This handle can then be requested by the SDP client in future transactions
* in lieu of a search UUID list.
*/
const struct
{
uint8_t Header;
@ -40,6 +51,10 @@ const struct
SWAPENDIAN_32(0x00010001),
};
/** Serial Port Profile attribute, listing the implemented Service Class UUIDs of the Serial Port service
* within the device. This list indicates all the class UUIDs that apply to the Serial Port service, so that
* a SDP client can search by a generalized class rather than a specific UUID to determine supported services.
*/
const struct
{
uint8_t Header;
@ -54,6 +69,10 @@ const struct
},
};
/** Serial Port Profile attribute, listing the Protocols (and their attributes) of the Serial Port service
* within the device. This list indicates what protocols the service is layered on top of, as well as any
* configuration information for each layer.
*/
const struct
{
uint8_t Header;
@ -77,11 +96,15 @@ const struct
(sizeof(ItemUUID_t) + sizeof(Item8Bit_t)),
{
{(SDP_DATATYPE_UUID | SDP_DATASIZE_128Bit), RFCOMM_UUID},
{(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_8Bit), 0x00},
{(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_8Bit), 0x03},
},
},
};
/** Serial Port Profile attribute, listing the Browse Group List UUIDs which this service is a member of.
* Browse Group UUIDs give a way to group together services within a device in a simple heirachy, so that
* a SDP client can progressively narrow down an general browse to a specific service which it requires.
*/
const struct
{
uint8_t Header;
@ -95,7 +118,10 @@ const struct
{(SDP_DATATYPE_UUID | SDP_DATASIZE_128Bit), PUBLICBROWSEGROUP_CLASS_UUID},
},
};
/** Serial Port Profile attribute, listing the languages (and their encodings) supported
* by the Serial Port service in its text string attributes.
*/
const struct
{
uint8_t Header;
@ -113,7 +139,8 @@ const struct
},
},
};
/** Serial Port Profile attribute, listing a human readable name of the service. */
const struct
{
uint8_t Header;
@ -126,6 +153,7 @@ const struct
"Wireless Serial Port",
};
/** Serial Port Profile attribute, listing a human readable description of the service. */
const struct
{
uint8_t Header;
@ -138,6 +166,9 @@ const struct
"Wireless Serial Port Service",
};
/** Service Attribute Table for the Serial Port service, linking each supported attribute ID to its data, so that
* the SDP server can retrieve it for transmission back to a SDP client upon request.
*/
const ServiceAttributeTable_t PROGMEM SerialPort_Attribute_Table[] =
{
{.AttributeID = SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE, .Data = &SerialPort_Attribute_ServiceHandle },

9
Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c
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@ -28,6 +28,14 @@
this software.
*/
/** \file
*
* SDP layer module. This module implements a simple Service Discovery
* Protocol server, which can broadcast the device's supported services
* to other Bluetooth devices upon request, so that they can determine
* what services are available.
*/
#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
#include "ServiceDiscoveryProtocol.h"
@ -62,6 +70,7 @@ void SDP_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
BT_SDP_DEBUG(2, "-- PDU ID: 0x%02X", SDPHeader->PDU);
BT_SDP_DEBUG(2, "-- Param Length: 0x%04X", SDPHeader->ParameterLength);
/* Dispatch to the correct processing routine for the given SDP packet type */
switch (SDPHeader->PDU)
{
case SDP_PDU_SERVICESEARCHREQUEST:

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