• CMSIS-DSP: CFFT with Q15, wrong output
    Hi, I changed the CMSIS-DSP frequency bin example to Q15 format (or at least I'm trying to do so), but I'm getting wrong results. My changed code: /* =================================================...
  • Feature request: add Windowing functions to CMSIS-DSP
    CMSIS-DSP offers some functions to perform FFT (Fast Fourier Transform). An usual approach, before a FFT, is to apply a window, for example to reduce leakage effect. A lot of different window have...
  • CMSIS DSP bit reverse table lengths
    Hi can someone please explain why these 4096 tables have table lengths of 4032 ? #define ARMBITREVINDEXTABLE_4096_TABLE_LENGTH ((uint16_t)4032) #define ARMBITREVINDEXTABLE_FIXED_4096_TABLE_LENGTH...
  • anyone could give me a .s document of FFT(fast fourier transform for 2^N point) for Arm7
    hi everyone, This is the first time that I used this Arm community. I am a graduate student at NJIT in the U.S. . These days, I am learning Arm by myself. I used Armsim compiler which is developed by...
  • arm_cmplx_mag_f32() producing all-zero output
    Hi, I'm trying to use arm FFT from the DSP library. The provided example (arm_fft_bin_example) is working, but once I use my own sinus wave values, I see an unexpected behavior. The values in arm_fft_bin_example_f32...