Functions
void	arm_cfft_radix4_f32 (const arm_cfft_radix4_instance_f32 S, float32_t pSrc)
	Processing function for the floating-point Radix-4 CFFT/CIFFT.
arm_status	arm_cfft_radix4_init_f32 (arm_cfft_radix4_instance_f32 *S, uint16_t fftLen, uint8_t ifftFlag, uint8_t bitReverseFlag)
	Initialization function for the floating-point CFFT/CIFFT.

Function Documentation

void arm_cfft_radix4_f32	(	const arm_cfft_radix4_instance_f32 *	S,
		float32_t *	pSrc
	)

Processing function for the floating-point Radix-4 CFFT/CIFFT.

Parameters:

[in]	*S	points to an instance of the floating-point Radix-4 CFFT/CIFFT structure.
[in,out]	*pSrc	points to the complex data buffer of size `2*fftLen`. Processing occurs in-place.

Definition at line 1181 of file arm_cfft_radix4_f32.c.

arm_status arm_cfft_radix4_init_f32	(	arm_cfft_radix4_instance_f32 *	S,
		uint16_t	fftLen,
		uint8_t	ifftFlag,
		uint8_t	bitReverseFlag
	)

Initialization function for the floating-point CFFT/CIFFT.

Parameters:

[in,out]	*S	points to an instance of the floating-point CFFT/CIFFT structure.
[in]	fftLen	length of the FFT.
[in]	ifftFlag	flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
[in]	bitReverseFlag	flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.

Returns:: The function returns ARM_MATH_SUCCESS if initialization is successful or ARM_MATH_ARGUMENT_ERROR if fftLen is not a supported value.

: The parameter ifftFlag controls whether a forward or inverse transform is computed. Set(=1) ifftFlag for calculation of CIFFT otherwise CFFT is calculated

: The parameter bitReverseFlag controls whether output is in normal order or bit reversed order. Set(=1) bitReverseFlag for output to be in normal order otherwise output is in bit reversed order.

: The parameter fftLen Specifies length of CFFT/CIFFT process. Supported FFT Lengths are 16, 64, 256, 1024.

: This Function also initializes Twiddle factor table pointer and Bit reversal table pointer.

Definition at line 77 of file arm_cfft_radix4_init_f32.c.

ComplexFFT
[Transform Functions]