Gaia
GAIA.ASU.SP.ESM.00007
Issue 2.00
Page 27 of 79
Astrium Ltd owns the copyright of this document which is supplied in confidence and which shall not be used for any purpose other than that for which it is supplied and shall not in
whole or in part be reproduced, copied, or communicated to any person without written permission from the owner.
GAIA.ASU.SP.ESM.00007 (Avionics SCOE Req Iss 2).doc
Note
2
: The purpose of PASSIVE mode operation on the SpaceWire BUS is to allow Models of the RTS to
operate in parallel with real Spacecraft Units without responding to commands on the BUS.
AVI-705/CREATED/T
In open-loop test modes, simulation of the each SpaceWire BUS shall be as fixed responders only.
AVI-4107/CREATED/T
In open-loop test modes, SpaceWire responder data shall be defined by local input file, direct user
input at the local MMI or by definition from the CCS (Test Procedure/Command Line).
The input file for default SpaceWire BUS response will be supplied by Astrium Ltd., in a human-readable file
format (such as XML) as agreed between Astrium Ltd and the Avionics SCOE subcontractor.
The input file will identify, as a minimum, the response data by:
• BUS Number (1 or 2)
• BUS Side (A/B)
• Command
• Symbolic Name
• Data Type
• Default Value
AVI-4101/CREATED/T
In open-loop test modes, the user shall be able to update the SpaceWire data response values from
the local MMI or CCS (Test Procedure) by specifying the Symbolic Name and data value.
AVI-706/CREATED/T
In closed-loop test mode, the RTS shall directly respond to the SpaceWire BUS (acquisition and data
simulation).
AVI-2860/CREATED/T
For each SpaceWire BUS, the Avionics SCOE shall implement a SpaceWire BUS SPY function which
shall capture all traffic of the BUS and store in local files.
Where appropriate, the SpaceWire BUS SPY function may be achieved using COTS software provided with
the SpaceWire cards.
AVI-2862/CREATED/T
A BUS ANALYSER tool shall be provided to allow the operator to view and analyse the SpaceWire
BUS traffic in real time.
AVI-2863/CREATED/T
The BUS ANALYSER tool shall also allow analysis of SpaceWire BUS traffic previously stored in local
files.
Where appropriate, the BUS ANALYSER function may be achieved using COTS software provided with the
SpaceWire cards.
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