RealTime Embedded CORBA over SpaceWire ESTEC May 2003

1
Real-Time Embedded CORBA over SpaceWireESTECMay
2003

• Steve Parkes, Stuart Mills, Chris McClements
• Space Systems Research Group
• University of Dundee
• Stuart Fowell, Roger Ward
• SciSys

2
Contents

• SpaceWire-DSP21160
• SpaceWire-Drivers

3
ADSP21160

• Main Features
• High performance 32-bit DSP processor
• 80MHz instruction rate
• Single cycle instruction execution
• 320 MFLOPs sustained
• 1024 pt complex FFT in 115 us
• Why choose it
• Backwards code compatible with 21060 SHARCs
• And almost with 21020
• Recent processor in this family
• Suitable for research not for flight

4
SpaceWire-DSP21160
5
SpaceWire Router
Control Logic
Non-blocking Crossbar Switch
SpaceWire Port 1
SpaceWire Port 2
SHARC LINK
External Port
Input FIFO
SpaceWire Port 3
Output FIFO
SHARC LINK
SpaceWire Port 4
SpaceWire Port 5
External Port
Input FIFO
SHARC LINK
SpaceWire Port 6
Output FIFO
SpaceWire Port 7
SpaceWire Port 8
6
SpaceWire-DSP21160
7
SOIF Protocol Stack
8
(No Transcript)
9
Real-Time SpaceWire Driver
10
Real-Time SpaceWire Driver
Low-Level Packet
TCP/IP Packet
Low-Level Packet
TCP/IP Packet
IP Address
IP to SpaceWire Address Table
Address Resolution
Priority Queue
SpaceWire Address
Encapsulate Packets
Decapsulate Packet
Priority Queue
SpaceWire Packet
SpaceWire Packet
11
Conclusions

• Project aims to demonstrate
• Distributed objects
• Running over a SpaceWire network
• With real-time performance
• SpaceWire-DSP21160
• Acts as a research platform
• For DSP processors in a SpaceWire network
• Software
• SpaceWire link driver
• Embedded Corba