CMSIS-DSP: arm_cfft_instance_q31 Struct Reference

| CMSIS-DSP Version 1.8.0 CMSIS DSP Software Library

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arm_cfft_instance_q31 Struct Reference

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

## Data Fields

uint16_t | fftLen
const q31_t * | pTwiddle
const uint16_t * | pBitRevTable
uint16_t | bitRevLength

## Field Documentation

uint16_t arm_cfft_instance_q31::bitRevLength

bit reversal table length.

uint16_t arm_cfft_instance_q31::fftLen

length of the FFT.

const uint16_t* arm_cfft_instance_q31::pBitRevTable

points to the bit reversal table.

const q31_t* arm_cfft_instance_q31::pTwiddle

points to the Twiddle factor table.