SpaceFibreFlight Software Workshop 2015

Steve Parkes, University of Dundee

Albert Ferrer Florit, Alberto Gonzalez Villafranca, STAR-Dundee Ltd.

David McLaren, Chris McClements, University of Dundee

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Contents SpaceFibre SpaceFibre standard SpaceFibre integrated quality of service SpaceFibre networks SpaceFibre cables and connectors SpaceFibre test and development equipment SpaceFibre chip designs SpaceFibre in radiation tolerant FPGAs

SpaceFibre

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4

SpaceFibre SpaceFibre is

– A spacecraft on-board data link and network

SpaceFibre runs over– Electrical and fibre optic cables

SpaceFibre designed specifically for spaceflight applications– Integrated QoS– Integrated FDIR capabilities– Galvanic isolation

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SpaceFibre Key Features High performance

– 2.5 Gbits/s current flight qualified technology– 3.125 Gbits/s soon (6.25 Gbits/s coming)– Multi laning of up to 16 lanes (40 Gbits/s)

Innovative integrated QoS– Priority– Bandwidth reservation– Scheduling

Novel integrated FDIR support– Transparent recovery from transient errors– Error containment in virtual channels and frames– “Babbling Node” protection

Low latency– Broadcast codes

Compatible with SpaceWire at packet level

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SpaceFibre Benefits Supports high data-rate instruments (e.g. SAR)

– Very high data rates

Reduces cost, schedule and risk– Reduction of harness mass– Simplification of redundancy– Increase in reliability– Straightforward error recovery– Very small footprint due to efficient design

Supports integrated AOCS/GNC and payload network– Quality of service– Deterministic data delivery

Supports launcher applications– Long distance– Galvanic isolation

Easy to integrate with existing SpaceWire equipment

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Integrated Network Single integrated network

– Carrying Instrument data Configuration and control information Deterministic traffic High resolution time information Event signals

– Improves reliability, mass, cost

SpaceFibre Standard

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SpaceFibre Standard ECSS

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Physical Layer

User Application

Lane Layer

Data Link Layer

Network Layer

Driver/ReceiverCablesConnectors

Link operationQuality of serviceLink error recovery

NodesRouters and routingMessage broadcastPacket definition

Packets

Lane initialisationEncoding of data & control wordsSerDes

Data & Control Words

Broadcast Messages Packets

Broadcast Messages

Data & Control Words

Multi-Lane Layer

Data & Control Words

Data & Control Words

Ma

na

ge

me

nt

La

yer

Parameters

Lane Control

Lane Status

Lane coordinationLane failure recovery

TX Symbols RX Symbols

Broadcast Messages

NChars NCharsBroadcast Messages

PhysicalControl

PhysicalStatus

SpaceFibre ECSS Working Group ECSS

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Physical Layer

User Application

Lane Layer

Data Link Layer

Network Layer

Data & Control Words

Driver/ReceiverCablesConnectors

Link operationQuality of serviceLink error recovery

NodesRouters and routingMessage broadcastPacket definition

PacketsBroadcast Messages

Lane initialisationEncoding of data & control wordsSerDes

Ma

na

ge

me

nt

La

yer

Parameters PacketsBroadcast Messages

Data & Control Words

Multi-Lane Layer

Data & Control Words

Data & Control Words

Lane Control

Lane Status

Lane coordinationLane failure recovery

TX Symbols RX Symbols

Broadcast Codes

NChars NCharsBroadcast Codes

PhysicalControl

PhysicalStatus

SpaceFibre Integrated QoS

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SpaceWire CODEC

12

SpaceWire CODEC

Packet Interface Time-Codes Management

Serial

SpaceFibre IP Core

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SpaceFibre IP Core

…Virtual Channel Interfaces Broadcast Management

SerDes

Each VC like pair of SpW FIFOs.Sends and Receives SpFi packets

Broadcasts short messages.Time distribution, synchronisation,

event signalling, error handling

Management interface configures VCs, BC, etc

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SpaceFibre Quality of Service Integrated QoS scheme

– Priority VC with highest priority

– Bandwidth reserved VC with allocated bandwidth and recent low utilisation

– Scheduled Synchronised time-slots

– E.g. by broadcast messages VCs allocated to specific time-slots In allocated time-slot, VC allowed to send

“Integrated” because– All three QoS work together– QoS is implemented in the hardware of the SpaceFibre

interface

Virtual Channels

VC sends when– Source VC buffer has data to send– Destination VC buffer has space in buffer– QoS for VC results in highest precedence

A SpW packet flowing through one VC does not block another packet flowing through another VC

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VC1

VC2

VC3

MAC

VC1

VC2

VC3

DEMUX

QoS: Bandwidth Reserved

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time

Precedence

Bandwidth Credit Counter

QoS: Bandwidth Reserved

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time

Precedence

QoS Priority

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time

Priority 1

Priority 2

Priority 3

QoS Babbling Idiot Protection

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time

Priority 1

Priority 2

Priority 3

Scheduled Precedence

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Time-slot 1 2 3 4 5 6 7 8

VC 1

VC 2

VC 3

VC 4

VC 5

VC 6

VC 7

Configured for Priority and BW Reserved Only

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Time-slot 1 2 3 4 5 6 7 8

VC 1

VC 2

VC 3

VC 4

VC 5

VC 6

VC 7

Simple Mixed QoS

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Time-slot 1 2 3 4 5 6 7 8

VC 1

VC 2

VC 3

VC 4

VC 5

VC 6

VC 7

Deterministic Data Delivery

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Time-slot 1 2 3 4 5 6 7 8

VC 1 (high priority)

VC 2 (high priority)

VC 3

VC 4

VC 5

VC 6

VC 7

Packets being transmitted

Packets being received

time

Time-slot 1

SpaceFibre Networks

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SpaceFibre Routing Switch

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Routing SwitchMatrix

SpaceFibreInterface

VC

VC

VC

VC

VC

SpaceFibreInterface

VC

VC

VC

VC

VC

SpaceFibreInterface

VC

VC

VC

VC

VC

SpaceFibreInterface

VC

VC

VC

VC

VC

ConfigurationPort

Port 2 Port 3

Port 1 Port 4

SpaceFibrePort 2

SpaceFibrePort 1

SpaceFibrePort 3

SpaceFibrePort 4

SpaceFibre Virtual Network

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SpaceFibreRoutingSwitch

VC

VC 6

VC

VC

VC

VC 6

VC

VC

VC

VC

VC 6

VC

VC

VC

VC

VC

VC

VC

VC 6

VC

SpFiPort

3

SpFiPort

4

SpFiPort

2

SpFiPort

1

VC 6

VC

VC

SpFiI/F

ControlProcessor

VC

VC 6

VC

SpFiI/F

MassMemory

Unit

VC

VC 6

VC

SpFiI/FInstrument 2

VC

VC 6

VC

SpFiI/FInstrument 1

Virtual channel buffers are configured to support specific virtual channelsOne set of buffers is always configured to support VC 0, the Configuration Virtual Network

SpaceFibre Virtual Point to Point Link

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SpaceFibreRoutingSwitch

VC

VC 6

VC

VC

VC

VC 6

VC 4

VC 2

VC

VC

VC 6

VC 4

VC

VC

VC

VC 2

VC

VC

VC 6

VC

SpFiPort

3

SpFiPort

4

SpFiPort

2

SpFiPort

1

VC 6

VC

VC

SpFiI/F

ControlProcessor

VC 2

VC 6

VC 4

SpFiI/F

MassMemory

Unit

VC 2

VC 6

VC

SpFiI/F

Instrument 2

VC 4

VC 6

VC

SpFiI/F

Instrument 1

SpaceFibre Virtual Point to Point Link

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SpaceFibreRoutingSwitch

VC

VC 6

VC

VC

VC

VC 6

VC 4

VC 2

VC

VC

VC 6

VC 4

VC

VC

VC

VC 2

VC

VC

VC 6

VC

SpFiPort

3

SpFiPort

4

SpFiPort

2

SpFiPort

1

VC 6

VC

VC

SpFiI/F

ControlProcessor

VC 2

VC 6

VC 4

SpFiI/F

MassMemory

Unit

VC 2

VC 6

VC

SpFiI/F

Instrument 2

VC 4

VC 6

VC

SpFiI/F

Instrument 1

Simple SpaceFibre Network

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SpaceFibreRoutingSwitch

VC

VC 6

VC

VC

VC

VC 6

VC 4

VC 2

VC

VC

VC 6

VC 4

VC

VC

VC

VC 2

VC

VC

VC 6

VC

SpFiPort

3

SpFiPort

4

SpFiPort

2

SpFiPort

1

VC 6

VC

VC

SpFiI/F

ControlProcessor

VC 2

VC 6

VC 4

SpFiI/F

MassMemory

Unit

VC 2

VC 6

VC

SpFiI/F

Instrument 2

VC 4

VC 6

VC

SpFiI/F

Instrument 1

Spacecraft Data Handling Application

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SpaceWire - SpaceFibre Bridge

VC 7

VC 1

VC 2VC 3

VC 4SpFiI/F

VC 5

VC 6

VC 8

SpaceFibreRoutingSwitch

VC

VC 7

VCVC

VC

VC 7

VC 1

VC 2VC 3

VC 4

VC 7

VC 1

VCVC

VC

VC 2

VC

VCVC 7

VC

SpFiPort

3

SpFiPort

4

SpFiPort

2

SpFiPort

1

VC 7

VC

VC

SpFiI/F

ControlProcessor

MassMemory

Unit

VC 2

VC 7

VC

SpFiI/F

Instrument 2

VC 1

VC 7

VC

SpFiI/F

Instrument 1

VC 7

VC

VCVC 8

VC

VC 3

VC 4

VC 5VC 6

VC 7

SpFiPort

4

SpFiPort

1

VC 8

VC 7

VC

SpFiI/F

DownlinkTelemetry

VC 4

VC 7

VC 5

SpFiI/F

SpaceWire Router

I 3

I 4

I 5

I 6

VC 6

VC 3

VC 5

VC 6

VC 8

Instruments

Spacecraft Data Handling Application

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ControlProcessor

MassMemory

Unit

Instrument 2

Instrument 1

DownlinkTelemetry

I 3

I 4

I 5

I 6

Instruments

Spacecraft Data Handling Application

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SpaceFibreRoutingSwitch

ControlProcessor

MassMemory

Unit

Instrument 2

Instrument 1

DownlinkTelemetry

SpaceWire SpaceFibre

Bridge

I 3

I 4

I 5

I 6

Instruments

SpaceFibreCables and Connectors

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SpaceFibre Physical Layer SpaceFibre can operate over

– Electrical cable up to 5 m– Fibre Optic cable at least 100 m

Electrical version uses CML– Differential– High-speed

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SpaceFibreTest and Development

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STAR Fire SpaceFibre unit designed by STAR-Dundee Multi-purpose

– SpaceFibre interface– SpaceWire to SpaceFibre bridge– SpaceFibre packet generators/checkers– SpaceFibre link analyser

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STAR Fire

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VC/BCIF

Reg

USB3

Router

SpW

SpW

1

2

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SpaceFibrePort 1

(8 Virtual Channels)

SpFi

AnalyserMictor

VC/BCIF

SpaceFibrePort 2

(8 Virtual Channels)

Reg

78

Analyser

SpFi

Mictor

RMAP Config(RMAP Target)

4

Configuration Bus

SpaceFibre Equipment

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SpaceFibre Chips

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SpaceFibre VHDL IP Core SpaceFibre VHDL IP Core

– Extensively tested and validated

Incorporates all capabilities– Full QoS– Fault detection, isolation and recovery– Low latency broadcast messages

Available from STAR-Dundee– Implemented in a range of FPGAs

Microsemi: AX, RTG4 Xilinx: V4, V5, Spartan 6, …

– Full and “lite” versions Full has configurable number of VCs Lite is designed for a simple instrument interface with 2 VCs

– High rate data VC– Low rate, high priority command and control VC

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Radiation Tolerant SpaceFibre ASIC

RC64 Many Core DSP Processor 64 fast CEVA X1643 DSP with FP

extension and HW scheduler– 300 MHz– 40 GFLOPS, 384 GOPS

Modem and Encrypt accelerators 4 Mbyte on-chip shared memory Fast I/O

– 12x SpaceFibre,– SpaceWire– DDR3, AD/DA LVDS I/F, NVM

Rad-Hard, for space Advanced technology

– TSMC 65nm LP– CCGA / PBGA / COB– 10 Watt

Modular– Payloads can employ many RC64

Versatile– Designed for all space missions– Planned for 2020—2050

Re-programmable in space

Shared Memory

M M M M M M M M

SpFi DDR2/3 AD/DA SpW NVMDMA

DSP

DSP

DSP

DSP

DSP

DSP

DSP

DSP

$ $ $ $ $ $ $ $

scheduler

MODEM

ENCRPT

RamonChips

SpaceFibre in Radiation Tolerant FPGAs

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SpaceFibre Lite Evaluation Board

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Commercial equivalent of flight proven parts– Microsemi RTAX1000 – TLK2711-SP SerDes

Pre-programmed with STAR SpFi IP core FMC interface for connection to development boards 2.5 Gbits/s with 32-bit interface at 62.5 MHz 20% to 25% of AX1000

SpaceFibre on RTG4

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FMC board to provide SpaceWire and SpaceFibre RTG4 SerDes running at 2.5 Gbits/s SpaceFibre interface 4% to 6% of RTG4 (2 to 8 VCs) SpaceWire interface 1%, RMAP Target 2% of RTG4

Demonstration RTG4 Design

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RTG4

SpW SpW SpW SpW

SpaceWire

SpaceFibreInterface

SpFi 4567

SpaceFibre Interface

SpFi4567

0123

RTG4

Spa

ceF

ibre

Spa

ceF

ibre

SpW SpW

RTG4

Spa

ceF

ibre

Spa

ceF

ibre

SpW SpW

Demonstration

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STAR Fire

Packet Generator

Packet Checker S

pace

Fib

re

Brick Mk3

SpW SpW

USB 3.0

Command Window Brick Mk3

SpWSpW

USB 3.0

Command Window

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Conclusions SpaceFibre designed specifically for spaceflight

applications– Integrated QoS– Integrated FDIR capabilities– Galvanic isolation– Compatible with SpaceWire packet level– Efficient design giving very small footprint

Benefits– Very high performance– Reduced harness mass– Interoperability with existing SpaceWire devices– Simplification of redundancy– Deterministic data delivery for control applications– Single integrated network

Running on RTAX and RTG4 now49

Thank YouAny questions?

Demonstration in Exhibition/Coffee area

www.star-dundee.com

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