microelectronic systems institute leandro soares indrusiak manfred glesner ricardo reis lookup-based...
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Microelectronic Systems Institute
Leandro Soares Indrusiak
Manfred Glesner
Ricardo Reis
Lookup-based Remote Laboratory for FPGA Digital Design Prototyping
Virtual-Lab 2004Setubal, Portugal
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Outline
• Motivation and Background– why FPGAs?
• Underlying software platform– why lookup-based?
• Remote Laboratory of Digital Design– what are the advantages?– and how about the disadvantages?
• Conclusions and Future Work
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Motivation and Background
• the design of digital electronic systems comprehends several rather complex tasks
• prototyping is necessary, for instance:– evaluation of the functionality by the end
user– evaluation of performance, power
consumption, heat dissipation, etc. under real operation conditions
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Motivation and Background
• prototyping of digital integrated circuits (ASICs) is really expensive
• FPGAs have been used by both companies and universities as prototyping platforms
• in some cases, FPGAs are even incorporated to consumer products
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Motivation and Background
• XCV800 Xilinx Virtex FPGA– 888.439 system gates– 487.44 HZ – 100MHZ– 166 IO-Pins
• 2 SRAM-Banks– each 512K*16 Bit
• 16 Mbit Flash RAM
www.xess.com
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Motivation and Background
• FPGAs offer– lower cost– more flexibility– faster prototyping cycles– affordable CAD support
• furthermore– on-the-field updates, reconfigurability
(partial and total), etc.
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Software Platform
• remote access to FPGAs– prototyped system must receive data from
external sources – prototyped system interacts with other
subsystems that cannot be physically integrated
– users may not be physically co-located with the FPGA resources they want to use
• software layer to ease remote access is needed
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Software Platform
• FPGAs should be accessed regardless of their network location or implementation details
Network
FPGA Platform AFPGA Platform B
FPGA Platform C
CLIENTprocess
process
processconfigureconfigure
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Software Platform
configuration bank
sub system
A
sub system
B
• our approach: FPGA encapsulation
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Software Platform
•
– TCP/IP based– middleware-based
approach• loose coupling between
clients and servers• alternatives: CORBA,
Jini, UPnP, webservices (UDDI+SOAP), etc.
client server
middleware
queries for
service
advertisesservice
• FPGA distribution over a network
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Software Platform
• Jini – it comprehends a Java-based set of APIs and
network protocols that support development and deployment of distributed systems organized as federations of services that are highly adaptive to change
– most of the facilities for service lookup, discovery and join are already implemented and freely available
– includes a programming model covering leases, events and transactions
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Software Platform
• Jini – Jini view of the network doesn't involve a
central controlling authority– the set of all services available on the network
form a federation - a group composed of equal peers
– Jini's infrastructure provides a way for clients and services to find each other
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Software Platform
• the basic mechanisms for adding, removing, finding and accessing services rely on the following protocols– discovery: supports both service providers
and clients on the location of lookup servers– join: allows the service providers to take part
on a federation of services by registering with a lookup server
– lookup: supports clients looking for services within the federation
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Software Platform
Server
Server
discovery
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Software Platform
Lookup Server
Proxy
Proxy
join
Server
Server
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Software Platform
Lookup Server
Proxy
Proxy
Server
Server
Client
discovery
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Software Platform
Lookup Server
Proxy
Proxy
Server
Server
Client
lookup
key
matches
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Software Platform
Lookup Server
Proxy
Server
Server
Client
Proxy
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Software Platform
lookup serviceclientreconfigurable
hardware service backend service configuration bank
create( )
registerService( )
discoverLookup( )
lookupService( )
configure( )getConfiguration( )
configure( )
process( )
process( )
discoverLookup( )
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Digital Design Remote Lab• laboratory activities usually involve iterations
over design entry, simulation, synthesis, analysis and prototypation phases
• a typical design problem is given (e.g. design a triple-DES encryption/decryption module able to support a rate of 100 Mbits/s) and the students work over the CAD tools to achieve an acceptable solution
• once an implementation is achieved, an FPGA configuration file can be generated and the design can be remotely prototyped using the proposed infrastructure
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Digital Design Remote Lab
Network
Reconfigurable Platform B
student
processconfigure
Reconfigurable Platform A
image/video
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Digital Design Remote Lab
reconfigurable hardware
module
reconfigurable hardware service
& lookup service
client
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Digital Design Remote Lab
• advantages– students can access the lab anywhere and
anytime– boards can be shared more efficiently– international design contests– video feed can provide further possibilities by
providing visual feedback from measuring instruments
– Java-based approach allows for platform independence
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Digital Design Remote Lab
• disadvantages– setting up both software and hardware
infrastructure can be complicated– currently rely on general purpose video
streaming (Microsoft Portrait) and communication (ICQ) packages, which are not available on every platform
– working with different FPGA platforms adds complexity
• board sharing is more difficult, as configurations must be specifically generated
• backend module is board-dependent
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Conclusions
• the technical infrastructure to build efficient access to remote FPGA boards was presented
• such infrastructure was used to set a remote laboratory for prototyping digital integrated circuits, allowing more flexibility and efficiency than the previously reported approaches
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Conclusions
• maintenance costs are lower, but setup costs are higher
• lack more detailed data about student acceptance
• lack more work on the integration of remote lab and lectures and/or online courses
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Future Work
• integration of the encapsulated FPGA boards within a simulation environment, allowing the users to validate parts of the system simulation model with the parts of the system which are already implemented in the FPGA board
• develop intelligent service proxies, in order to allow an FPGA board to use other services
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Thanks for your attention
Microelectronic Systems Institute
http://www.microelectronic.e-technik.tu-darmstadt.de http://www.inf.ufrgs.br
Leandro Soares Indrusiak
Manfred Glesner
Ricardo Reis
<indrusiak, glesner>@mes.tu-darmstadt.de
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Software Platform
• data type abstraction
ba
cken
d
int
float
int[ ]
10101110101011101010101010101010100101010101010010101010101001001010100111001010101010011100100001011111
mem
ory
hard
war
e de
sign
mem
ory
inte
rfac
e ty
pe a
bstr
actio
n
std_
logi
c_ve
ctor
bit_
vect
or
object domain hardware domain