本文深入研究了Nios 自定制指令的軟硬件接口，基于Altera 的IP 核FFT V2.2.0實(shí)現(xiàn)了變換長(zhǎng)度為1024 點(diǎn)的高速?gòu)?fù)數(shù)FFT 算法，提出了一種在Nios 嵌入式系統(tǒng)中定制用戶FFT 算法指令的方法。研究表明，將FFT 算法加入到Nios 嵌入式處理器指令集中，可以幫助系統(tǒng)完成復(fù)雜的數(shù)據(jù)處理任務(wù)，增強(qiáng)Nios 系統(tǒng)的實(shí)時(shí)處理能力。
關(guān)鍵詞：知識(shí)產(chǎn)權(quán)核；快速傅立葉變換；自定制指令；Nios 嵌入式處理器
Abstract: The paper researched the software and hardware interface techniques of custom
instructions for Nios embedded processor, implemented a 1024 dot plural FFT arithmetic
based on IP core FFT V2.2.0 of Altera corporation, proposed a method of custom FFT
instructions for Nios. Research result shows, system designer can use custom instructions to
implement 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