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Design Retiming na HDL úrovni
Kafka, Leoš ; Matoušek, Rudolf
This paper deals with an improvement of design timing characteristics by modification at the high abstraction level of the system description. Some synthesis tools such as Synplify Pro provide timing optimizations, called pipelining and retiming. These techniques help the designer unify delay slacks at different inputs, which results in higher system clock frequencies of the produced circuit.
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Analysis and Implementation of Dynamic Reconfiguration for FPGAs
Honzík, Petr
This paper describes platform for dynamic reconfiguration on an FPGA with embedded microcontroller. The platform is divided to the hardware and software parts. A microcontroller is initiator of the reconfiguration process. A reconfiguration controller drives autonomously the reconfiguration process. The ronfiguration bitstreams and programs are stored in an external memory connected to the FPGA.
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Injektor poruch pro TSC obvody založený na FPGA
Kafka, Leoš
Newer FPGA devices are more susceptible to faults, especially transient faults. Some kind of concurrent error detection approach has to be used to avoid system failure due to these aults. To obtain the totally self checking property is the goal in most cases, but it's often impossible. It's useful to evaluate numbers of detectable and undetectable faults. An FPGA-based fault injector capable to get these values is presented in this paper. It's implemented in Atmel FPSLIC and uses dynamic reconfiguration.
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Dynamic reconfiguration of FPGAs: a case study
Matoušek, Rudolf
This paper discusses dynamic reconfiguration achievable using current FPGA methodology. An analysis of implementation issues has been presented and desirable features of future generation of CAD tools have been discussed. Several practical examples have been presented together with their implementation data.
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Logarithmic number system and floating-point arithmetics an FPGA
Pohl, Zdeněk
An introduction to a logarithmic number system (LNS) is presented. Range and procision of this arithmetic is briefly discussed. We show that the LNS arithmetics is suitable for a FPGA implementation. A case study will compare parameters of our LNS arithmetic library to a conventional floating-point arithmetic.
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Dynamic reconfiguration of FPGAs
Matoušek, Rudolf ; Pohl, Zdeněk ; Daněk, Martin ; Kadlec, Jiří
Dymnamic reconfiguration of FPGA devices has been an issue of the last decade. Althouth this new feature of currently available devices permits more robust and flexible designs, it has not been recognized by professionals. This paper disscussed demands placed by dynamic reconfiguration on design tools as well as on designes themselves. A case study is presented for the Atmel AT94K family and the supplied design tools, and values are provided that should aid in analyzing such designs.
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Dynamic runtime partial reconfiguration in FPGA
Matoušek, Rudolf ; Daněk, Martin ; Pohl, Zdeněk ; Kadlec, Jiří
Runtime dynamic reconfiguration of FPGA devices has been an issue of the last decade. Although this feature permits more robust and more flexible designes and devices that posseses it are available on the market, it is not directly supported by the current design tools. This paper presents a simple design that uses true dymnamic reconfiguration for Atmel AT94K devices. The design has been implemented using a special feature of the currently available Figaro IDS5.2 tool in an innovative way.
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Evolutionary techniques in physical design for FPGAs
Daněk, Martin ; Muzikář, Z.
This paper disscusses two studies of using evolutionary algorithms in physical design for FPGAs. The first study presents an adaptation of a genetic algorithm that optimises parametres of a linear delay model for Xilinx XC4000 FPGA and compares their performance to parameters optimised by hand. The second study showes implementation and performance of an adaptive technology mapping algorithm for XC4000 based on Wilsons XCS classifier system.
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