本文深入研究了Nios 自定制指令的软硬件接口,基于Altera 的IP 核FFT V2.2.0实现了变换长度为1024 点的高速复数FFT 算法,提出了一种在Nios 嵌入式系统中定制用户FFT 算法指令的方法。研究表明,将FFT 算法加入到Nios 嵌入式处理器指令集中,可以帮助系统完成复杂的数据处理任务,增强Nios 系统的实时处理能力。关键词:知识产权核;快速傅立叶变换;自定制指令;Nios 嵌入式处理器Abstract: The paper researched the software and hardware interface techniques of custominstructions for Nios embedded processor, implemented a 1024 dot plural FFT arithmeticbased on IP core FFT V2.2.0 of Altera corporation, proposed a method of custom FFTinstructions for Nios. Research result shows, system designer can use custom instructions toimplement complex data processing tasks by adding FFT instructions to Nios instructions set,enhanced the real-time processing ability of system.Keywords: IP Core;FFT;Custom Instructions;Nios Embedded Processor
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