NRF_DSP_CFFT_TWIDDLE_COEF_64_F32

const flt32_t NRF_DSP_CFFT_TWIDDLE_COEF_64_F32[128]

Initial value:

= {
    1.000000000f,  0.000000000f,  0.995184727f,  0.098017140f,  0.980785280f,  0.195090322f,
    0.956940336f,  0.290284677f,  0.923879533f,  0.382683432f,  0.881921264f,  0.471396737f,
    0.831469612f,  0.555570233f,  0.773010453f,  0.634393284f,  0.707106781f,  0.707106781f,
    0.634393284f,  0.773010453f,  0.555570233f,  0.831469612f,  0.471396737f,  0.881921264f,
    0.382683432f,  0.923879533f,  0.290284677f,  0.956940336f,  0.195090322f,  0.980785280f,
    0.098017140f,  0.995184727f,  0.000000000f,  1.000000000f,  -0.098017140f, 0.995184727f,
    -0.195090322f, 0.980785280f,  -0.290284677f, 0.956940336f,  -0.382683432f, 0.923879533f,
    -0.471396737f, 0.881921264f,  -0.555570233f, 0.831469612f,  -0.634393284f, 0.773010453f,
    -0.707106781f, 0.707106781f,  -0.773010453f, 0.634393284f,  -0.831469612f, 0.555570233f,
    -0.881921264f, 0.471396737f,  -0.923879533f, 0.382683432f,  -0.956940336f, 0.290284677f,
    -0.980785280f, 0.195090322f,  -0.995184727f, 0.098017140f,  -1.000000000f, 0.000000000f,
    -0.995184727f, -0.098017140f, -0.980785280f, -0.195090322f, -0.956940336f, -0.290284677f,
    -0.923879533f, -0.382683432f, -0.881921264f, -0.471396737f, -0.831469612f, -0.555570233f,
    -0.773010453f, -0.634393284f, -0.707106781f, -0.707106781f, -0.634393284f, -0.773010453f,
    -0.555570233f, -0.831469612f, -0.471396737f, -0.881921264f, -0.382683432f, -0.923879533f,
    -0.290284677f, -0.956940336f, -0.195090322f, -0.980785280f, -0.098017140f, -0.995184727f,
    -0.000000000f, -1.000000000f, 0.098017140f,  -0.995184727f, 0.195090322f,  -0.980785280f,
    0.290284677f,  -0.956940336f, 0.382683432f,  -0.923879533f, 0.471396737f,  -0.881921264f,
    0.555570233f,  -0.831469612f, 0.634393284f,  -0.773010453f, 0.707106781f,  -0.707106781f,
    0.773010453f,  -0.634393284f, 0.831469612f,  -0.555570233f, 0.881921264f,  -0.471396737f,
    0.923879533f,  -0.382683432f, 0.956940336f,  -0.290284677f, 0.980785280f,  -0.195090322f,
    0.995184727f,  -0.098017140f
}

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 = 64, PI = 3.14159265358979

Cos and Sin values are in interleaved fashion