Eli Hughes
V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.
Dependents: MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more
arm_cfft_radix2_instance_f32 Struct Reference
Instance structure for the floating-point CFFT/CIFFT function. More...
#include <arm_math.h>
Data Fields | |
| uint16_t | fftLen |
| length of the FFT. | |
| uint8_t | ifftFlag |
| flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. | |
| uint8_t | bitReverseFlag |
| flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. | |
| float32_t * | pTwiddle |
| points to the Twiddle factor table. | |
| uint16_t * | pBitRevTable |
| points to the bit reversal table. | |
| uint16_t | twidCoefModifier |
| twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. | |
| uint16_t | bitRevFactor |
| bit reversal modifier that supports different size FFTs with the same bit reversal table. | |
| float32_t | onebyfftLen |
| value of 1/fftLen. | |
Detailed Description
Instance structure for the floating-point CFFT/CIFFT function.
Definition at line 2132 of file arm_math.h.
Field Documentation
| uint8_t bitReverseFlag |
flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
Definition at line 2136 of file arm_math.h.
| uint16_t bitRevFactor |
bit reversal modifier that supports different size FFTs with the same bit reversal table.
Definition at line 2140 of file arm_math.h.
| uint16_t fftLen |
length of the FFT.
Definition at line 2134 of file arm_math.h.
| uint8_t ifftFlag |
flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
Definition at line 2135 of file arm_math.h.
| float32_t onebyfftLen |
value of 1/fftLen.
Definition at line 2141 of file arm_math.h.
| uint16_t* pBitRevTable |
points to the bit reversal table.
Definition at line 2138 of file arm_math.h.
| float32_t* pTwiddle |
points to the Twiddle factor table.
Definition at line 2137 of file arm_math.h.
| uint16_t twidCoefModifier |
twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
Definition at line 2139 of file arm_math.h.
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