Gaia
GAIA.ASU.SP.ESM.00007
Issue 2.00
Page 31 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
3
: The purpose of PASSIVE mode operation on the PW BUS is to allow Models of the RTS to operate in
parallel with real Spacecraft Units without responding to commands on the BUS.
AVI-3521/CREATED/T
In open-loop test modes, simulation of the each PacketWire BUS shall be as fixed responders only.
AVI-4108/CREATED/T
In open-loop test modes, PW response 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 PW 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 - 4)
• BUS Side (A/B)
• Command
• Symbolic Name
• Data Type
• Default Value
AVI-4104/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-3522/CREATED/T
In closed-loop test mode, the RTS shall directly respond to the PW BUS (acquisition and data
simulation).
AVI-3523/CREATED/T
For each PW BUS, the Avionics SCOE shall implement a PW BUS SPY function which shall capture
all traffic of the BUS and store in local files.
Where appropriate, the PW BUS SPY function may be achieved using COTS software provided with the PW
cards.
AVI-3525/CREATED/T
A BUS ANALYSER tool shall be provided to allow the operator to view and analyse the PW BUS
traffic in real time.
AVI-3526/CREATED/T
The BUS ANALYSER tool shall also allow analysis of PW BUS traffic previously stored in local files.
Where appropriate, the BUS ANALYSER function may be achieved using COTS software provided with the
PW cards.
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