Instance structure for the floating-point CFFT/CIFFT function. More...

#include <arm_math.h>

Data Fields
uint16_t	fftLen
	length of the FFT.
uint8_t	ifftFlag
	flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
uint8_t	bitReverseFlag
	flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
float32_t *	pTwiddle
	points to the twiddle factor table.
uint16_t *	pBitRevTable
	points to the bit reversal table.
uint16_t	twidCoefModifier
	twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
uint16_t	bitRevFactor
	bit reversal modifier that supports different size FFTs with the same bit reversal table.
float32_t	onebyfftLen
	value of 1/fftLen.

Detailed Description

Instance structure for the floating-point CFFT/CIFFT function.

Definition at line 1853 of file arm_math.h.

Field Documentation

flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.

Definition at line 1857 of file arm_math.h.

bit reversal modifier that supports different size FFTs with the same bit reversal table.

Definition at line 1861 of file arm_math.h.

uint16_t fftLen

length of the FFT.

Definition at line 1855 of file arm_math.h.

flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.

Definition at line 1856 of file arm_math.h.

value of 1/fftLen.

Definition at line 1862 of file arm_math.h.

points to the bit reversal table.

Definition at line 1859 of file arm_math.h.

float32_t* pTwiddle

points to the twiddle factor table.

Definition at line 1858 of file arm_math.h.

twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Definition at line 1860 of file arm_math.h.