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Diffstat (limited to 'DSP_Lib/Source/TransformFunctions/arm_cfft_radix4_init_q31.c')
| -rw-r--r-- | DSP_Lib/Source/TransformFunctions/arm_cfft_radix4_init_q31.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/DSP_Lib/Source/TransformFunctions/arm_cfft_radix4_init_q31.c b/DSP_Lib/Source/TransformFunctions/arm_cfft_radix4_init_q31.c deleted file mode 100644 index a375a5f..0000000 --- a/DSP_Lib/Source/TransformFunctions/arm_cfft_radix4_init_q31.c +++ /dev/null @@ -1,148 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_cfft_radix4_init_q31.c -* -* Description: Radix-4 Decimation in Frequency Q31 FFT & IFFT initialization function -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#include "arm_math.h" -#include "arm_common_tables.h" - -/** - * @ingroup groupTransforms - */ - -/** - * @addtogroup ComplexFFT - * @{ - */ - -/** -* -* @brief Initialization function for the Q31 CFFT/CIFFT. -* @deprecated Do not use this function. It has been superseded by \ref arm_cfft_q31 and will be removed -* @param[in,out] *S points to an instance of the Q31 CFFT/CIFFT structure. -* @param[in] fftLen length of the FFT. -* @param[in] ifftFlag flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. -* @param[in] bitReverseFlag flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. -* @return The function returns ARM_MATH_SUCCESS if initialization is successful or ARM_MATH_ARGUMENT_ERROR if <code>fftLen</code> is not a supported value. -* -* \par Description: -* \par -* The parameter <code>ifftFlag</code> controls whether a forward or inverse transform is computed. -* Set(=1) ifftFlag for calculation of CIFFT otherwise CFFT is calculated -* \par -* The parameter <code>bitReverseFlag</code> 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. -* \par -* The parameter <code>fftLen</code> Specifies length of CFFT/CIFFT process. Supported FFT Lengths are 16, 64, 256, 1024. -* \par -* This Function also initializes Twiddle factor table pointer and Bit reversal table pointer. -*/ - -arm_status arm_cfft_radix4_init_q31( - arm_cfft_radix4_instance_q31 * S, - uint16_t fftLen, - uint8_t ifftFlag, - uint8_t bitReverseFlag) -{ - /* Initialise the default arm status */ - arm_status status = ARM_MATH_SUCCESS; - /* Initialise the FFT length */ - S->fftLen = fftLen; - /* Initialise the Twiddle coefficient pointer */ - S->pTwiddle = (q31_t *) twiddleCoef_4096_q31; - /* Initialise the Flag for selection of CFFT or CIFFT */ - S->ifftFlag = ifftFlag; - /* Initialise the Flag for calculation Bit reversal or not */ - S->bitReverseFlag = bitReverseFlag; - - /* Initializations of Instance structure depending on the FFT length */ - switch (S->fftLen) - { - /* Initializations of structure parameters for 4096 point FFT */ - case 4096u: - /* Initialise the twiddle coef modifier value */ - S->twidCoefModifier = 1u; - /* Initialise the bit reversal table modifier */ - S->bitRevFactor = 1u; - /* Initialise the bit reversal table pointer */ - S->pBitRevTable = (uint16_t *) armBitRevTable; - break; - - /* Initializations of structure parameters for 1024 point FFT */ - case 1024u: - /* Initialise the twiddle coef modifier value */ - S->twidCoefModifier = 4u; - /* Initialise the bit reversal table modifier */ - S->bitRevFactor = 4u; - /* Initialise the bit reversal table pointer */ - S->pBitRevTable = (uint16_t *) & armBitRevTable[3]; - break; - - case 256u: - /* Initializations of structure parameters for 256 point FFT */ - S->twidCoefModifier = 16u; - S->bitRevFactor = 16u; - S->pBitRevTable = (uint16_t *) & armBitRevTable[15]; - break; - - case 64u: - /* Initializations of structure parameters for 64 point FFT */ - S->twidCoefModifier = 64u; - S->bitRevFactor = 64u; - S->pBitRevTable = (uint16_t *) & armBitRevTable[63]; - break; - - case 16u: - /* Initializations of structure parameters for 16 point FFT */ - S->twidCoefModifier = 256u; - S->bitRevFactor = 256u; - S->pBitRevTable = (uint16_t *) & armBitRevTable[255]; - break; - - default: - /* Reporting argument error if fftSize is not valid value */ - status = ARM_MATH_ARGUMENT_ERROR; - break; - } - - return (status); -} - -/** - * @} end of ComplexFFT group - */ |