CMSIS-DSP  Verison 1.1.0
CMSIS DSP Software Library
arm_cfft_radix2_instance_q15 Struct Reference

Instance structure for the Q15 CFFT/CIFFT function.

Data Fields

uint16_t fftLen
uint8_t ifftFlag
uint8_t bitReverseFlag
q15_tpTwiddle
uint16_t * pBitRevTable
uint16_t twidCoefModifier
uint16_t bitRevFactor

Field Documentation

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

Referenced by arm_cfft_radix2_init_q15().

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

Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().

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

Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().

points to the bit reversal table.

Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().

points to the Sin twiddle factor table.

Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().

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

Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().