Detailed Description

CCSDS-AOS Virtual Channel.

See also: ccsds_aos.h, ccsds::Dispatch. A "channel" object represents a single virtual channel, bound to a unique Satellite ID and Virtual Channel ID. It may be configured in M_PDU (SPP packets) or B_PDU (byte-stream) mode. Each channel requires its own transmit and receive buffers, which are not provided as part of this object.

Definition at line 109 of file ccsds_aos.h.

#include <ccsds_aos.h>

Inheritance diagram for satcat5::ccsds_aos::Channel:

Collaboration diagram for satcat5::ccsds_aos::Channel:

Public Member Functions
	Channel (satcat5::ccsds_aos::Dispatch iface, satcat5::io::Readable src, satcat5::io::Writeable *dst, u8 scid, u8 vcid, bool pkt)
	Create a virtual channel, bound to an AOS interface. More...

void	desync ()
	Force resynchronization after an error.

void	frame_rcvd (satcat5::io::LimitedRead &src) override
	Process each received AOS frame.

void	set_wildcard ()
	Enable wildcard mode, ignoring incoming SCID and VCID. More...

Protected Types
enum class	State { RAW , RESYNC , HEADER , DATA , SKIP }

Protected Member Functions
void	data_rcvd (satcat5::io::Readable *src) override
	The data_rcvd() callback is polled whenever data is available. More...

void	data_unlink (satcat5::io::Readable *src) override
	Unlink this EventListener from the designated source, because the designated Readable object is being destroyed. More...

u8	idle_filler (satcat5::io::Writeable *dst, unsigned req)

bool	read_header (satcat5::io::Readable *src)

Protected Attributes
satcat5::ccsds_aos::Dispatch *const	m_iface

satcat5::io::Readable *	m_src

satcat5::io::Writeable *const	m_dst

satcat5::io::ArrayWrite	m_rx_spp

satcat5::ccsds_aos::Header	m_rx_next

satcat5::ccsds_aos::Header	m_tx_next

satcat5::ccsds_aos::Channel::State	m_rx_state

unsigned	m_rx_rem

u8	m_tx_busy

u8	m_tx_irem

u16	m_tx_iseq

u8	m_rx_tmp [6]

satcat5::net::Type	m_filter
	Incoming packet filter.

Private Attributes
satcat5::net::Protocol *	m_next
	Linked list of Protocols.

Constructor & Destructor Documentation

◆ Channel()

Channel::Channel	(	satcat5::ccsds_aos::Dispatch *	iface,
		satcat5::io::Readable *	src,
		satcat5::io::Writeable *	dst,
		u8	scid,
		u8	vcid,
		bool	pkt
	)

Create a virtual channel, bound to an AOS interface.

Unidirectional channels may use null "src" or "dst".

Definition at line 68 of file ccsds_aos.cc.

Member Function Documentation

◆ data_rcvd()

void Channel::data_rcvd ( satcat5::io::Readable * src )

overrideprotectedvirtual

The data_rcvd() callback is polled whenever data is available.

A pointer is provided to assist handlers with multiple sources. Child objects of io::EventListener MUST override this method.

Implements satcat5::io::EventListener.

Definition at line 179 of file ccsds_aos.cc.

◆ data_unlink()

void Channel::data_unlink ( satcat5::io::Readable * src )

overrideprotectedvirtual

Unlink this EventListener from the designated source, because the designated Readable object is being destroyed.

Child objects of io::EventListener MAY override this method if action is required.

Reimplemented from satcat5::io::EventListener.

Definition at line 233 of file ccsds_aos.cc.

◆ set_wildcard()

void Channel::set_wildcard ( )

Enable wildcard mode, ignoring incoming SCID and VCID.

Do not call this method if the AOS link may contain more than one virtual channel. Outgoing packets will continue to use the SCID and VCID set by the constructor.

Definition at line 110 of file ccsds_aos.cc.

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

Detailed Description

Public Member Functions

Protected Types

Protected Member Functions