sdr::AX25 Class Reference

Decodes AX25 (PacketRadio) messages from a bit stream. More...

#include <ax25.hh>

Inheritance diagram for sdr::AX25:

Public Member Functions
	AX25 ()
	Constructor. More...
virtual	~AX25 ()
	Destructor. More...
virtual void	config (const Config &src_cfg)
	Configures the node. More...
virtual void	process (const Buffer< uint8_t > &buffer, bool allow_overwrite)
	Processes the bit stream. More...
Public Member Functions inherited from sdr::Sink< uint8_t >
	Sink ()
	Constructor. More...
virtual	~Sink ()
	Drestructor. More...
virtual void	handleBuffer (const RawBuffer &buffer, bool allow_overwrite)
	Re-implemented from SinkBase. More...
Public Member Functions inherited from sdr::SinkBase
	SinkBase ()
	Constructor. More...
virtual	~SinkBase ()
	Destructor. More...
Public Member Functions inherited from sdr::Source
	Source ()
	Constructor. More...
virtual	~Source ()
	Destructor. More...
virtual void	send (const RawBuffer &buffer, bool allow_overwrite=false)
	Sends the given buffer to all connected sinks. More...
void	connect (SinkBase *sink, bool direct=false)
	Connect this source to a sink. More...
void	disconnect (SinkBase *sink)
	Disconnect a sink again. More...
virtual void	setConfig (const Config &config)
	Stores the configuration and propergates it if the configuration has been changed. More...
virtual double	sampleRate () const
	Returns the configured sample rate or 0 otherwise. More...
virtual Config::Type	type () const
	Returns the configured source type or Config::Type_UNDEFINED otherwise. More...
template<class T >
void	addEOS (T *instance, void(T::*function)())
	Adds a callback to the end-of-stream signal of the source. More...

Static Public Member Functions
static void	unpackCall (const uint8_t *buffer, std::string &call, int &ssid, bool &addrExt)
	Unpacks a AX.25 encoded call (address). More...

Protected Attributes
uint32_t	_bitstream
	The last bits. More...
uint32_t	_bitbuffer
	A buffer of received bits. More...
uint32_t	_state
	The current state. More...
uint8_t	_rxbuffer [512]
	Message buffer. More...
uint8_t *	_ptr
	Insert-pointer to the buffer. More...
Buffer< uint8_t >	_buffer
	Output buffer. More...
Protected Attributes inherited from sdr::Source
Config	_config
	Holds the source configuration, this can be updated by calling setConfig. More...
std::map< SinkBase *, bool >	_sinks
	The connected sinks. More...
std::list< DelegateInterface * >	_eos
	The connected EOS singal handlers. More...

Additional Inherited Members
Protected Member Functions inherited from sdr::Source
void	signalEOS ()
	Signals the EOS. More...
void	propagateConfig (const Config &config)
	Propagates the given configuration to all connected sinks. More...

Detailed Description

Decodes AX25 (PacketRadio) messages from a bit stream.

In conjecture with the (A)FSK demodulator, the AX25 can be used to receive packet radio or APRS messages. AX25 is usually transmitted as FSK in transition mode, means the bits aren't encoded by mark & space tones but rather as a transition from mark to space or in reverse. Hence the FSK node needs to be configured in transition mode.

The node does not process the actual AX.25 packages, it only checks the frame check sequence and forwards the AX.25 datagram to all connected sinks on success. The receiving node is responsible for unpacking and handling the received datagram.

Constructor & Destructor Documentation

AX25::AX25

(

)

Constructor.

AX25::~AX25 ( )

virtual

Destructor.

Member Function Documentation

void AX25::config ( const Config &  src_cfg )

virtual

Configures the node.

Implements sdr::SinkBase.

void AX25::process ( const Buffer< uint8_t > &  buffer, bool  allow_overwrite  )

virtual

Processes the bit stream.

Todo:

Double check this!!!

Implements sdr::Sink< uint8_t >.

void AX25::unpackCall ( const uint8_t *  buffer, std::string &  call, int &  ssid, bool &  addrExt  )

static

Unpacks a AX.25 encoded call (address).

Member Data Documentation

uint32_t sdr::AX25::_bitbuffer

protected

A buffer of received bits.

uint32_t sdr::AX25::_bitstream

protected

The last bits.

Buffer<uint8_t> sdr::AX25::_buffer

protected

Output buffer.

uint8_t* sdr::AX25::_ptr

protected

Insert-pointer to the buffer.

uint8_t sdr::AX25::_rxbuffer[512]

protected

Message buffer.

uint32_t sdr::AX25::_state

protected

The current state.

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The documentation for this class was generated from the following files:

• /Users/hannes/Uni/Elektronik/sdr/libsdr/src/ax25.hh
• /Users/hannes/Uni/Elektronik/sdr/libsdr/src/ax25.cc