关键词: 现场可编程门阵列, VHDL, 可移植性, 参数化设计, HMMer

Abstract: With the fast development of FPGA manufacture technology，more and more algorithms can be implemented on FPGA.Although VHDL has its own portability，a design’s portability acquires the management of scale with specify FPGA chip.Besides one kind of algorithm can be applied to many areas，the size of design should be adaptive to particular application.Design parameterization is a design method that can generate designs of various processing capability by corresponded parameters.Design parameterization is an efficient way for portability.This paper firstly proposes a synthesis tool based parameterization method on VHDL，secondly illustrates detail operations with design of a multi-way parity checksum generator，and finally applies the parameterization technique onto a FPGA implementation of HMMer.The parameterization method proposed by this paper has simple operations，minimal code change，and no dependency to executable code generators.Experiment shows that it is a low cost but highly efficient parameterization solution.

Key words: Field-Programmable Gate Array（FPGA）, Very-High-Speed Integrated Circuit Hardware Description Language（VHDL）, portability, design parameterization, HMMer