Callisto4Bootloader: arm_rfft_instance_q31 Struct Reference

Callisto4Bootloader

Data Fields
arm_rfft_instance_q31 Struct Reference

Instance structure for the Q31 RFFT/RIFFT function. More...

`#include <arm_math.h>`

## Data Fields

uint32_t | fftLenReal
uint8_t | ifftFlagR
uint8_t | bitReverseFlagR
uint32_t | twidCoefRModifier
const q31_t * | pTwiddleAReal
const q31_t * | pTwiddleBReal
const arm_cfft_instance_q31 * | pCfft

## Detailed Description

Instance structure for the Q31 RFFT/RIFFT function.

Definition at line 2187 of file arm_math.h.

## Field Documentation

## ◆ bitReverseFlagR

uint8_t arm_rfft_instance_q31::bitReverseFlagR

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

Definition at line 2191 of file arm_math.h.

## ◆ fftLenReal

uint32_t arm_rfft_instance_q31::fftLenReal

length of the real FFT.

Definition at line 2189 of file arm_math.h.

## ◆ ifftFlagR

uint8_t arm_rfft_instance_q31::ifftFlagR

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

Definition at line 2190 of file arm_math.h.

## ◆ pCfft

const arm_cfft_instance_q31* arm_rfft_instance_q31::pCfft

points to the complex FFT instance.

Definition at line 2195 of file arm_math.h.

## ◆ pTwiddleAReal

const q31_t* arm_rfft_instance_q31::pTwiddleAReal

points to the real twiddle factor table.

Definition at line 2193 of file arm_math.h.

## ◆ pTwiddleBReal

const q31_t* arm_rfft_instance_q31::pTwiddleBReal

points to the imag twiddle factor table.

Definition at line 2194 of file arm_math.h.

## ◆ twidCoefRModifier

uint32_t arm_rfft_instance_q31::twidCoefRModifier

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

Definition at line 2192 of file arm_math.h.

The documentation for this struct was generated from the following file:

- CMSIS/arm_math.h