sdr::POCSAG Class Reference

Implements a POCSAG decoder. More...

#include <pocsag.hh>

Inheritance diagram for sdr::POCSAG:

Classes
class	Message
	A pocsag message. More...

Public Member Functions
	POCSAG ()
	Constructor. More...
void	config (const Config &src_cfg)
	Needs to be implemented by any sub-type to check and perform the configuration of the node. More...
void	process (const Buffer< uint8_t > &buffer, bool allow_overwrite)
	Needs to be implemented by any sub-type to process the received data. More...
virtual void	handleMessages ()
	Can be overwritten by any other implementation to process the received messages stored in _queue. 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...

Protected Types
enum	State { WAIT, RECEIVE, CHECK_CONTINUE }
	The possible states of the POGSAC receiver. More...

Protected Member Functions
void	_process_word (uint32_t word)
	Process a POGSAC word. More...
void	_reset_message ()
	Clear the message. More...
void	_finish_message ()
	Add the (non-empty) message to the queue. More...

Protected Attributes
State	_state
	The current state. More...
uint64_t	_bits
	The last received bits. More...
uint8_t	_bitcount
	The number of received bits. More...
uint8_t	_slot
	The current slot. More...
Message	_message
	The current message. More...
std::list< Message >	_queue
	The completed messages. More...

Detailed Description

Implements a POCSAG decoder.

In conjecture with the FSKDetector or AFSDetector and the BitStream nodes, this node can be used to receive and process POCSAG (pages) messages.

The POCSAG protocol is defined as followig:

1) at least 576 bits of alternating value (1 0 1 0 ...) 2) a 32-bit sync word (0x7CD215D8) 3) 2x8 data words (each 32 bit) 4) If data left to send -> continue with step 2

Unused data words are send as 0x7A89C197. Each dataword is either a address word (bit 31 = 0) or message word (bit 31 = 1).

Constructor & Destructor Documentation

POCSAG::POCSAG

(

)

Constructor.

Member Function Documentation

void POCSAG::_finish_message ( )

protected

Add the (non-empty) message to the queue.

void POCSAG::_process_word ( uint32_t  word )

protected

Process a POGSAC word.

void POCSAG::_reset_message ( )

protected

Clear the message.

void POCSAG::config ( const Config &  src_cfg )

virtual

Needs to be implemented by any sub-type to check and perform the configuration of the node.

Implements sdr::SinkBase.

void POCSAG::handleMessages ( )

virtual

Can be overwritten by any other implementation to process the received messages stored in _queue.

Reimplemented in sdr::POCSAGDump.

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

virtual

Needs to be implemented by any sub-type to process the received data.

Implements sdr::Sink< uint8_t >.

Member Data Documentation

uint8_t sdr::POCSAG::_bitcount

protected

The number of received bits.

uint64_t sdr::POCSAG::_bits

protected

The last received bits.

Message sdr::POCSAG::_message

protected

The current message.

std::list<Message> sdr::POCSAG::_queue

protected

The completed messages.

uint8_t sdr::POCSAG::_slot

protected

The current slot.

State sdr::POCSAG::_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/pocsag.hh
• /Users/hannes/Uni/Elektronik/sdr/libsdr/src/pocsag.cc