Slide : 1 6/11-2008SpaceWire Conference SpaceWire Test and Demonstration using the Integrated Payload Processing Module J.Ilstad, D.Jameux European Space

6/11-2008 SpaceWire ConferenceSlide : 1

SpaceWire Test and Demonstration using the Integrated Payload Processing

Module

J.Ilstad, D.Jameux European Space Research Technology Centre

(ESTEC)

SpaceWire Conference 2008Nara, Japan

06/11/2008 SpaceWire Conference 2008 Slide : 2

SpaceWire Test & Demonstration Platform

Outline

• Motivation• TDP Overview• TDP Architecture

– Integrated Payload Processing Module– RTEMS– Packet Utilization Standard

• SpaceWire Demonstration Scenarios• Future Outlook• Conclusion



Motivation• Establish and demonstrate best practices towards….

– Network Topologies with respect to reference architectures.

– Redundancy Schemes and FDIR– SpW Networking Protocols together with use of SpW-

enabled equipment• General purpose processing nodes • Dedicated processing modules • Nodes with no processing capability



TDP overview• Basic setup: TT&C, SMU, PDHU, 1 instrument, no redundancy• A mix between RMAP and subset of PUS is used in TDP 1.0



TDP 1.0 Architecture

MASS MEMORY Application

SpWUSB Brick

TM/TC and

Display Unit

SMU

IPPM #3Satellite Management Unit

CANMIL- 1553

UART_A

UART_B

DSU

GPIO

PCI256 MBSDRAM

4 MBFLASH

2 MBSRAM

AT697E

IPPM #2Payload Data Handling Unit

CANMIL- 1553

UART_A

UART_B

DSU

GPIO

PCI256 MBSDRAM

4 MBFLASH

2 MBSRAM

AT697E

IPPM #1Instrument Unit

CANMIL- 1553

UART_A

UART_B

DSU

GPIO

PCI256 MBSDRAM

4 MBFLASH

2 MBSRAM

AT697E

Dedicated Payload Data to TM SpW

link

Discrete I/Os

Low Rate TM/TC

SpW link

SpWTo

PC I/F

1 PPS

INSTRUMENT

Mass Memory Module

PHDU

Transponders +Space Links +

Ground Segement

RTEMS

PUS packets

• SpaceWire Demonstration Activity with Aurelia Microelettronica (IT) T0 Q3 2008, end Q2 2009.

• 3 IPPM boards is used as basis for an onboard DHSRMAP



Integrated Payload Processing Module

IPPM

CANMIL- 1553

UART_A

UART_B

DSU

GPIO

PCI256 MBSDRAM

4 MBFLASH

2 MBSRAM

AT697E

ICCU

AT697E CPU

262 Mbyte memory

SpW Router 10X

2 CAN links

MIL1553 Bus

DSU Connector

UARTs (GPIO)

PCI connector

GPIO pins

ICCU (control FPGA)



IPPM Control and Communication Unit• Remote Control• SW Application

upload• Bridge traffic

between other bus interfaces

• Direct memory access

RMAP CoDec

PCI

DSU

• Other Protocols will be processed by SW



RTEMS

• Primary Motivation– Open Source– Real Time multitasking kernel with modular architecture– Availability of development and support tools

• E.g. Eclipse with plug-ins, RTEMS configuration tools– Great potential for critical onboard SW

• Secondary Motivation– Availability of support

• Gaisler Resarch, EDI soft (RTEMS Centre Europe)– Mission heritage (e.g. Hercel Planck)– In-house developments (e.g. RASTA)



RTEMS

• Objectives– To utilize RTEMS with SpaceWire equipment and

protocol related development activities• Identify requirements and constraints at both SW and

HW level• Identify recommendations or best practices for

implementation.



Packet Utilization Standard (ECSS-E-70-41a)

• Background– The PUS complements the CCSDS packet TM&TC

standards by defining the application-level interface between ground and space

– It provides the operational concepts and a set of on-board Services meeting them.

– It defines TM&TC packets and structures to exploit the onboard services.

• Motivation– Study interaction between PUS and SpW protocols.



SpaceWire demonstration scenarios

• Test and validate SpW network topologies and SpW-enabled devices

• Investigate SpW-based time distribution as opposed to legacy time distribution (PPS)

• Prototyping and validating SpW-based protocols coupled with use of PUS

• Evaluate FDIR concepts in this context• Introduce SOIS in future development steps of TDP



Future Outlook

Inst. 2

PDHU

Satellite

Management

Unit

S-Band

TM/TC

Payload

Platform

X-Band

TM

MM

Inst. 3

Inst. 1

AOCS

Subsystem

Mock-up

Power

Subsystem

Mock-up

Propulsion

Subsystem

Mock-up

P/F MIL 1553

P/L MIL 1553

P/F MIL 1553

SpaceWire

Discrete I/O

P/L MIL 1553Discrete IO

CAN

RTU Sensor

Cluster

ASSP w/ SpW IF

SpW-RT

SpW PnP

SpW-RT

SpW PnPIPPM Unit



Conclusion

• SpaceWire Test & Demonstration Platform– view towards current and future SpaceWire related development

activities. • The features of the IPPM make it an ideal candidate for;

– experimentation and validation of SpaceWire‑enabled equipment;– SpaceWire network topology and protocols;– Hosting RTEMS based applications conforming to ECSS-E-70-41a

(PUS) and SW based protocol handlers.• Future development steps of the TDP will introduce;

– SpaceWire equipment based on the next generation of ASSPs such as the SpW-RTC.

– CCSDS SOIS



Thank You

Documents

Slide : 1 6/11-2008SpaceWire Conference SpaceWire Test and Demonstration using the Integrated Payload Processing Module J.Ilstad, D.Jameux European Space