Workshop - November 2011 - Toulouse Absolute scalar magnetometer controller design Jean BERTRAND, Jérémie POULY – CNES Axel BONESS, François BERTRAND –

Workshop - November 2011 - Toulouse

Absolute scalar magnetometer controller design

Jean BERTRAND, Jérémie POULY – CNESAxel BONESS, François BERTRAND – CEA LETI

Workshop - November 2011

CNES interest in SoCKET projectConstat / Lessons learned :

Embedded software functions are more and more complex (autonomy, onboard data processing)

Increasing capacity of FPGA and ASIC suitable for space applications implies design complexity (soft IP µP core)

Nevertheless, current HW and SW processes are independent and show little collaboration

Need for a mixed (HW/SW) design environmentFast prototyping tools / architecture explorationModel based validation early in the development cycleStrong needs for HW/SW optimization for payload digital

processing unit. Often scientific DPU are very “mission specific” and use all (and more) available computing resources.

Workshop - November 2011

CNES goals in SoCKET projectCritical Embedded System design is our daily concern :

Support to scientific payloads under laboratories responsibility.Small Satellites platform developed by CNES itself.

CNES wants to offer a “ready to use” design environment(process, toolbox, architecture and building blocks)

And also :Work together with space industry

towards innovationTransfer SoCKET learning to our

scientific partners

Workshop - November 2011

CNES case studyIn SoCKET, CNES wants to carry the needs of scientific

laboratories involved in space projectsCase study based on existing system : ASM SWARM,

developed by CEA LETI.

Workshop - November 2011

ASM SWARM Helium 4 optical pumping magnetometer Goal : absolute measurement of magnetic field (scalar & vector)

Gérard Cottet

Workshop - November 2011

ASM SWARM : complexity

Workshop - November 2011

ASM SWARM : specificitiesLow frequency :

10 kHz in HW1 kHz in SW

But large HW datapath :32 bits at endpoint96 bits at largest point

Calculus in HWManagement & some computing in SW

Workshop - November 2011

EvaluationMission :

Evaluate as a small entity our capacity to integrate SoCKET flow to deliver a spatial ASIC

3 stages:1) Modelize SWARM to master SoCKET tools

2) Cosimulate HW and SW

3) Alternative HW architecture exploration and optimisation

Workshop - November 2011

RelevanceFull adoption of SoCKET flow

SpecificationModelisationCosimulationArchitecture explorationDevelopment

Constrained environmentLimited human resourcesDefinite applicationSpatial constraints

Workshop - November 2011

Questions