arm_cfft_radix4_instance_q31 Struct Reference

Instance structure for the Q31 CFFT/CIFFT function. More...

#include <arm_math.h>

Data Fields
uint16_t	fftLen
uint8_t	ifftFlag
uint8_t	bitReverseFlag
q31_t *	pTwiddle
uint16_t *	pBitRevTable
uint16_t	twidCoefModifier
uint16_t	bitRevFactor

---

Detailed Description

Instance structure for the Q31 CFFT/CIFFT function.

Definition at line 1569 of file arm_math.h.

---

Field Documentation

uint16_t arm_cfft_radix4_instance_q31::fftLen

length of the FFT.

Definition at line 1571 of file arm_math.h.

uint8_t arm_cfft_radix4_instance_q31::ifftFlag

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

Definition at line 1572 of file arm_math.h.

uint8_t arm_cfft_radix4_instance_q31::bitReverseFlag

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

Definition at line 1573 of file arm_math.h.

q31_t* arm_cfft_radix4_instance_q31::pTwiddle

points to the twiddle factor table.

Definition at line 1574 of file arm_math.h.

uint16_t* arm_cfft_radix4_instance_q31::pBitRevTable

points to the bit reversal table.

Definition at line 1575 of file arm_math.h.

uint16_t arm_cfft_radix4_instance_q31::twidCoefModifier

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

Definition at line 1576 of file arm_math.h.

uint16_t arm_cfft_radix4_instance_q31::bitRevFactor

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

Definition at line 1577 of file arm_math.h.

---

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

• arm_math.h