答:硬件设计文档里有专门的FFT硬核部分的讲解,另外,有一个EE-322讲解了怎么用插件来生成加速器代码
21489的硬件设计文档:http://www.analog.com/media/en/dsp-documentation/processor-manuals/ADSP-214xx_hwr_rev1.1.pdf
EE-322:http://www.analog.com/media/en/technical-documentation/application-notes/EE-322rev5.pdf
EE-322的例程:http://www.analog.com/media/en/technical-documentation/application-notes/EE322v05.zip
21489核心板链接:https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-5192690539.11.x6QxR7&id=39868115399
21489仿真器链接:https://item.taobao.com/item.htm?spm=2013.1.0.0.cFLzmW&id=38007242820