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C6678,调用DSPF_sp_fftspxsp()



C6678,调用DSPF_sp_fftspxsp(N,输入,旋转因子,输出,brev,rad,offset,N)。。最后的四个参数好像在库函数里面是无效的,任意修改不会改变结果。。我想使用库函数完成大点数FFT拆开来完成,需要设置最后四个参数,但是无效果。。请问怎么办? 是不是只能用 DSPF_sp_fftspxsp_opt 来完成