NRF_DSP_CFFT_TWIDDLE_COEF_128_F32

const flt32_t NRF_DSP_CFFT_TWIDDLE_COEF_128_F32[256]

Initial value:

= {
    1.000000000f,  0.000000000f,  0.998795456f,  0.049067674f,  0.995184727f,  0.098017140f,
    0.989176510f,  0.146730474f,  0.980785280f,  0.195090322f,  0.970031253f,  0.242980180f,
    0.956940336f,  0.290284677f,  0.941544065f,  0.336889853f,  0.923879533f,  0.382683432f,
    0.903989293f,  0.427555093f,  0.881921264f,  0.471396737f,  0.857728610f,  0.514102744f,
    0.831469612f,  0.555570233f,  0.803207531f,  0.595699304f,  0.773010453f,  0.634393284f,
    0.740951125f,  0.671558955f,  0.707106781f,  0.707106781f,  0.671558955f,  0.740951125f,
    0.634393284f,  0.773010453f,  0.595699304f,  0.803207531f,  0.555570233f,  0.831469612f,
    0.514102744f,  0.857728610f,  0.471396737f,  0.881921264f,  0.427555093f,  0.903989293f,
    0.382683432f,  0.923879533f,  0.336889853f,  0.941544065f,  0.290284677f,  0.956940336f,
    0.242980180f,  0.970031253f,  0.195090322f,  0.980785280f,  0.146730474f,  0.989176510f,
    0.098017140f,  0.995184727f,  0.049067674f,  0.998795456f,  0.000000000f,  1.000000000f,
    -0.049067674f, 0.998795456f,  -0.098017140f, 0.995184727f,  -0.146730474f, 0.989176510f,
    -0.195090322f, 0.980785280f,  -0.242980180f, 0.970031253f,  -0.290284677f, 0.956940336f,
    -0.336889853f, 0.941544065f,  -0.382683432f, 0.923879533f,  -0.427555093f, 0.903989293f,
    -0.471396737f, 0.881921264f,  -0.514102744f, 0.857728610f,  -0.555570233f, 0.831469612f,
    -0.595699304f, 0.803207531f,  -0.634393284f, 0.773010453f,  -0.671558955f, 0.740951125f,
    -0.707106781f, 0.707106781f,  -0.740951125f, 0.671558955f,  -0.773010453f, 0.634393284f,
    -0.803207531f, 0.595699304f,  -0.831469612f, 0.555570233f,  -0.857728610f, 0.514102744f,
    -0.881921264f, 0.471396737f,  -0.903989293f, 0.427555093f,  -0.923879533f, 0.382683432f,
    -0.941544065f, 0.336889853f,  -0.956940336f, 0.290284677f,  -0.970031253f, 0.242980180f,
    -0.980785280f, 0.195090322f,  -0.989176510f, 0.146730474f,  -0.995184727f, 0.098017140f,
    -0.998795456f, 0.049067674f,  -1.000000000f, 0.000000000f,  -0.998795456f, -0.049067674f,
    -0.995184727f, -0.098017140f, -0.989176510f, -0.146730474f, -0.980785280f, -0.195090322f,
    -0.970031253f, -0.242980180f, -0.956940336f, -0.290284677f, -0.941544065f, -0.336889853f,
    -0.923879533f, -0.382683432f, -0.903989293f, -0.427555093f, -0.881921264f, -0.471396737f,
    -0.857728610f, -0.514102744f, -0.831469612f, -0.555570233f, -0.803207531f, -0.595699304f,
    -0.773010453f, -0.634393284f, -0.740951125f, -0.671558955f, -0.707106781f, -0.707106781f,
    -0.671558955f, -0.740951125f, -0.634393284f, -0.773010453f, -0.595699304f, -0.803207531f,
    -0.555570233f, -0.831469612f, -0.514102744f, -0.857728610f, -0.471396737f, -0.881921264f,
    -0.427555093f, -0.903989293f, -0.382683432f, -0.923879533f, -0.336889853f, -0.941544065f,
    -0.290284677f, -0.956940336f, -0.242980180f, -0.970031253f, -0.195090322f, -0.980785280f,
    -0.146730474f, -0.989176510f, -0.098017140f, -0.995184727f, -0.049067674f, -0.998795456f,
    -0.000000000f, -1.000000000f, 0.049067674f,  -0.998795456f, 0.098017140f,  -0.995184727f,
    0.146730474f,  -0.989176510f, 0.195090322f,  -0.980785280f, 0.242980180f,  -0.970031253f,
    0.290284677f,  -0.956940336f, 0.336889853f,  -0.941544065f, 0.382683432f,  -0.923879533f,
    0.427555093f,  -0.903989293f, 0.471396737f,  -0.881921264f, 0.514102744f,  -0.857728610f,
    0.555570233f,  -0.831469612f, 0.595699304f,  -0.803207531f, 0.634393284f,  -0.773010453f,
    0.671558955f,  -0.740951125f, 0.707106781f,  -0.707106781f, 0.740951125f,  -0.671558955f,
    0.773010453f,  -0.634393284f, 0.803207531f,  -0.595699304f, 0.831469612f,  -0.555570233f,
    0.857728610f,  -0.514102744f, 0.881921264f,  -0.471396737f, 0.903989293f,  -0.427555093f,
    0.923879533f,  -0.382683432f, 0.941544065f,  -0.336889853f, 0.956940336f,  -0.290284677f,
    0.970031253f,  -0.242980180f, 0.980785280f,  -0.195090322f, 0.989176510f,  -0.146730474f,
    0.995184727f,  -0.098017140f, 0.998795456f,  -0.049067674f
}

Example code for Floating-point Twiddle factors Generation:

for (i = 0; i< N/; i++)
{
      NRF_DSP_CFFT_TWIDDLE_COEF[2*i]   = cos(i * 2*PI/(flt32_t)N);
      NRF_DSP_CFFT_TWIDDLE_COEF[2*i+1] = sin(i * 2*PI/(flt32_t)N);
} 

where N = 128, PI = 3.14159265358979

Cos and Sin values are in interleaved fashion