CMSIS DSP library

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arm_rfft_instance_f32 Struct Reference

arm_rfft_instance_f32 Struct Reference

Instance structure for the floating-point RFFT/RIFFT function. More...

#include <arm_math.h>

Data Fields

uint32_t fftLenReal
 length of the real FFT.
uint16_t fftLenBy2
 length of the complex FFT.
uint8_t ifftFlagR
 flag that selects forward (ifftFlagR=0) or inverse (ifftFlagR=1) transform.
uint8_t bitReverseFlagR
 flag that enables (bitReverseFlagR=1) or disables (bitReverseFlagR=0) bit reversal of output.
uint32_t twidCoefRModifier
 twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
float32_t * pTwiddleAReal
 points to the real twiddle factor table.
float32_t * pTwiddleBReal
 points to the imag twiddle factor table.
arm_cfft_radix4_instance_f32pCfft
 points to the complex FFT instance.

Detailed Description

Instance structure for the floating-point RFFT/RIFFT function.

Definition at line 2194 of file arm_math.h.


Field Documentation

uint8_t bitReverseFlagR

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

Definition at line 2199 of file arm_math.h.

uint16_t fftLenBy2

length of the complex FFT.

Definition at line 2197 of file arm_math.h.

uint32_t fftLenReal

length of the real FFT.

Definition at line 2196 of file arm_math.h.

uint8_t ifftFlagR

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

Definition at line 2198 of file arm_math.h.

points to the complex FFT instance.

Definition at line 2203 of file arm_math.h.

float32_t* pTwiddleAReal

points to the real twiddle factor table.

Definition at line 2201 of file arm_math.h.

float32_t* pTwiddleBReal

points to the imag twiddle factor table.

Definition at line 2202 of file arm_math.h.

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

Definition at line 2200 of file arm_math.h.