31.7.4 mips_fft32_setup – Function Deprecated

Description

Calculates the twiddle factors need to compute an FFT of size N. The twiddle factors are used by the mips_fft32() function. The number of samples to be processed is specified by the parameter log2N: N = 2^log2N.

Include

dsplib_dsp.h

Prototype

void
mips_fft32_setup
(
       int32c *twiddles,
       int log2N
);

Argument

twiddles: Output array containing N 32-bit complex twiddle factors.

log2N: Logarithm base 2 of the number of samples: N = 2^log2N.

Return Value

None.

Remarks

This function requires floating-point support.

Notes

This function is implemented in C.