arm_rfft_instance_q31 Struct Reference

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

#include <arm_math.h>

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

Detailed Description

Instance structure for the Q31 RFFT/RIFFT function.

Member Data Documentation

bitReverseFlagR

uint8_t arm_rfft_instance_q31::bitReverseFlagR

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

fftLenReal

uint32_t arm_rfft_instance_q31::fftLenReal

length of the real FFT.

ifftFlagR

uint8_t arm_rfft_instance_q31::ifftFlagR

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

pCfft

const arm_cfft_instance_q31* arm_rfft_instance_q31::pCfft

points to the complex FFT instance.

pTwiddleAReal

q31_t* arm_rfft_instance_q31::pTwiddleAReal

points to the real twiddle factor table.

pTwiddleBReal

q31_t* arm_rfft_instance_q31::pTwiddleBReal

points to the imag twiddle factor table.

twidCoefRModifier

uint32_t arm_rfft_instance_q31::twidCoefRModifier

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

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

• CMSIS/Include/arm_math.h