arm_cfft_radix8_f32.c initialization

cezarymikowski commented 7 years ago

There is arm_cfft_radix8_f32.c procedure in CMSIS_5/CMSIS/DSP/Source/TransformFunctions/ but for use it some internal structure must be initializeed: /*

@brief Core function for the floating-point CFFT butterfly process.
@param[in, out] *pSrc points to the in-place buffer of floating-point data type.
@param[in] fftLen length of the FFT.
@param[in] *pCoef points to the twiddle coefficient buffer.
@param[in] twidCoefModifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
@return none. */

How should it be done? I can not see arm_cfft_radix8_init_f32.c procedure (equivalent to arm_cfft_radix4_init_f32.c or arm_cfft_radix2_init_f32.c).

JonatanAntoni commented 7 years ago

This file contains only the arm_radix8_butterfly_f32 internal helper function. Why do you like to make use of this function directly? It is not intended to be an interface function from outside the DSP library.

cezarymikowski commented 7 years ago

I missunderstood this function usage. Thank you for explanation. Closed.

ARM-software / CMSIS_5

arm_cfft_radix8_f32.c initialization #176