Detailed Description

CCSDS "Advanced Orbiting Systems" (AOS) Space Data Link Protocol.

This file defines SatCat5 networking primitives (i.e., net::Address, net::Dispatch, and net::Protocol), and other utility functions for the CCSDS AOS Space Data Link Protocol, Blue Book 732.0-B-4.

For simplicity, SatCat5 lumps the Spacecraft ID and the Virtual Channel ID into a single address/protocol binding. The fixed size of the Transfer Frame Data Field is specified on creation.

For now, only the following configuration is supported:

Space Data Link Security (SDLS) is disabled.
Frame Header Error Control Field is disabled.
Transfer Frame Insert Zone is disabled.
Operational Control Field is disabled.
Frame Error Control Field (FECF) is required.

The I/O format can be configured for frame or stream mode. In "frame" mode, the underlying physical medium provides framing information and no further encoding is required. In "stream" mode, the byte-stream is further encoded using CCSDS "TM Synchronization and Channel Coding" (Blue Book 131.0-B-5) in uncoded mode. This simply inserts (or expects) a fixed 32-bit sync-word (0x1ACFFC1D) before each AOS transfer frame.

Definition in file ccsds_aos.h.

#include <satcat5/crc16_checksum.h>
#include <satcat5/net_core.h>
#include <satcat5/pkt_buffer.h>

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Classes
struct	satcat5::ccsds_aos::Header
	CCSDS-AOS transfer frame header. More...

class	satcat5::ccsds_aos::Channel
	CCSDS-AOS Virtual Channel. More...

class	satcat5::ccsds_aos::Dispatch
	Implemention of "net::Dispatch" API for CCSDS-AOS protocol. More...

class	satcat5::ccsds_aos::DispatchStatic< DSIZE >
	Dispatch with a statically-allocated working buffer. More...

Variables
constexpr u16	satcat5::ccsds_aos::VERSION_MASK = 0xC000

constexpr u16	satcat5::ccsds_aos::SCID_MASK = 0x3FC0

constexpr u16	satcat5::ccsds_aos::VCID_MASK = 0x003F

constexpr u8	satcat5::ccsds_aos::REPLAY_MASK = 0x80

constexpr u8	satcat5::ccsds_aos::FRCT_EXT_MASK = 0x40

constexpr u8	satcat5::ccsds_aos::RSVD_MASK = 0x30

constexpr u8	satcat5::ccsds_aos::FRCT_VAL_MASK = 0x0F

constexpr u16	satcat5::ccsds_aos::VERSION_2 = (1 << 14)

constexpr u32	satcat5::ccsds_aos::TM_SYNC_WORD = 0x1ACFFC1D
	Sync-word for CCSDS "TM Synchronization and Channel Coding".

constexpr u8	satcat5::ccsds_aos::TM_SYNC_BYTES [] = {0x1A, 0xCF, 0xFC, 0x1D}

constexpr u16	satcat5::ccsds_aos::VCID_DEFAULT = 0x0000

constexpr u16	satcat5::ccsds_aos::VCID_IDLE = 0x003F

Detailed Description

Classes

Variables