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i want to use fix point FFT, but ROM consumption very high,so can you help to decrease the ROM consumption?

Question asked by 富国 林 on Apr 14, 2015
Latest reply on Apr 26, 2015 by xiangjun.rong

    arm_rfft_fast_init_f32(&S,  fftSize);

    arm_rfft_fast_f32(&S,testInput_f32_10khz,testOutput,0);   this function need 80kB ROM to save the coffee, but i just need 512 point FFT.

if i use rfft_q31,the ROM consumption over 130kB, so how to optimize it?