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Evolutionary fault recovery in a Virtex FPGA using a representation that incorporates routing

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3 Author(s)
Lohn, J. ; Computational Sci. Div., NASA Ames Res. Center, Moffett Field, CA, USA ; Larchev, G. ; DeMara, R.

Most evolutionary approaches to fault recovery in FPGA focus on evolving alternative logic configurations as opposed to evolving the intra-cell routing. Since the majority of transistors in a typical FPGA are dedicated to interconnect, nearly 80% according to one estimate, evolutionary fault-recovery systems should benefit by accommodating routing. In this paper, we propose an evolutionary fault-recovery system employing a genetic representation that takes into account both logic and routing configurations. Experiments were run using a software model of the Xilinx Virtex FPGA. We report that using four Virtex combinational logic blocks, we were able to evolve a 100% accurate quadrature decoder finite state machine in the presence of a stuck-at-zero fault. Evolutionary experiments with the hardware in the loop have begun and we discuss the preliminary results.

Published in:

Parallel and Distributed Processing Symposium, 2003. Proceedings. International

Date of Conference:

22-26 April 2003