Simon Ford
CMSIS DSP Library from CMSIS 2.0. See http://www.onarm.com/cmsis/ for full details
Dependents: K22F_DSP_Matrix_least_square BNO055-ELEC3810 1BNO055 ECE4180Project--Slave2 ... more
arm_rfft_instance_q31 Struct Reference
Instance structure for the Q31 RFFT/RIFFT function. More...
#include <arm_math.h>
Data Fields | |
| uint32_t | fftLenReal |
| length of the real FFT. | |
| uint32_t | fftLenBy2 |
| length of the complex FFT. | |
| uint8_t | ifftFlagR |
| flag that selects forward (ifftFlagR=0) or inverse (ifftFlagR=1) transform. | |
| uint8_t | bitReverseFlagR |
| flag that enables (bitReverseFlagR=1) or disables (bitReverseFlagR=0) bit reversal of output. | |
| uint32_t | twidCoefRModifier |
| twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. | |
| q31_t * | pTwiddleAReal |
| points to the real twiddle factor table. | |
| q31_t * | pTwiddleBReal |
| points to the imag twiddle factor table. | |
| arm_cfft_radix4_instance_q31 * | pCfft |
| points to the complex FFT instance. | |
Detailed Description
Instance structure for the Q31 RFFT/RIFFT function.
Definition at line 2106 of file arm_math.h.
Field Documentation
| uint8_t bitReverseFlagR |
flag that enables (bitReverseFlagR=1) or disables (bitReverseFlagR=0) bit reversal of output.
Definition at line 2111 of file arm_math.h.
| uint32_t fftLenBy2 |
length of the complex FFT.
Definition at line 2109 of file arm_math.h.
| uint32_t fftLenReal |
length of the real FFT.
Definition at line 2108 of file arm_math.h.
| uint8_t ifftFlagR |
flag that selects forward (ifftFlagR=0) or inverse (ifftFlagR=1) transform.
Definition at line 2110 of file arm_math.h.
points to the complex FFT instance.
Definition at line 2115 of file arm_math.h.
| q31_t* pTwiddleAReal |
points to the real twiddle factor table.
Definition at line 2113 of file arm_math.h.
| q31_t* pTwiddleBReal |
points to the imag twiddle factor table.
Definition at line 2114 of file arm_math.h.
| uint32_t twidCoefRModifier |
twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
Definition at line 2112 of file arm_math.h.
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