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CMSIS-DSP
Version 1.5.2
CMSIS DSP Software Library
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Instance structure for the Q15 CFFT/CIFFT function.
Data Fields | |
| uint16_t | fftLen |
| uint8_t | ifftFlag |
| uint8_t | bitReverseFlag |
| q15_t * | pTwiddle |
| uint16_t * | pBitRevTable |
| uint16_t | twidCoefModifier |
| uint16_t | bitRevFactor |
| uint8_t arm_cfft_radix2_instance_q15::bitReverseFlag |
flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
Referenced by arm_cfft_radix2_init_q15().
| uint16_t arm_cfft_radix2_instance_q15::bitRevFactor |
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().
| uint16_t arm_cfft_radix2_instance_q15::fftLen |
length of the FFT.
Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().
| uint8_t arm_cfft_radix2_instance_q15::ifftFlag |
flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().
| uint16_t* arm_cfft_radix2_instance_q15::pBitRevTable |
points to the bit reversal table.
Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().
| q15_t* arm_cfft_radix2_instance_q15::pTwiddle |
points to the Sin twiddle factor table.
Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix2_q15().
| uint16_t arm_cfft_radix2_instance_q15::twidCoefModifier |
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().