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Diffstat (limited to 'DSP_Lib/Source/FilteringFunctions/arm_fir_decimate_init_f32.c')
| -rw-r--r-- | DSP_Lib/Source/FilteringFunctions/arm_fir_decimate_init_f32.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/DSP_Lib/Source/FilteringFunctions/arm_fir_decimate_init_f32.c b/DSP_Lib/Source/FilteringFunctions/arm_fir_decimate_init_f32.c deleted file mode 100644 index 7896510..0000000 --- a/DSP_Lib/Source/FilteringFunctions/arm_fir_decimate_init_f32.c +++ /dev/null @@ -1,117 +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_fir_decimate_init_f32.c -* -* Description: Floating-point FIR Decimator 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" - -/** - * @ingroup groupFilters - */ - -/** - * @addtogroup FIR_decimate - * @{ - */ - -/** - * @brief Initialization function for the floating-point FIR decimator. - * @param[in,out] *S points to an instance of the floating-point FIR decimator structure. - * @param[in] numTaps number of coefficients in the filter. - * @param[in] M decimation factor. - * @param[in] *pCoeffs points to the filter coefficients. - * @param[in] *pState points to the state buffer. - * @param[in] blockSize number of input samples to process per call. - * @return The function returns ARM_MATH_SUCCESS if initialization was successful or ARM_MATH_LENGTH_ERROR if - * <code>blockSize</code> is not a multiple of <code>M</code>. - * - * <b>Description:</b> - * \par - * <code>pCoeffs</code> points to the array of filter coefficients stored in time reversed order: - * <pre> - * {b[numTaps-1], b[numTaps-2], b[N-2], ..., b[1], b[0]} - * </pre> - * \par - * <code>pState</code> points to the array of state variables. - * <code>pState</code> is of length <code>numTaps+blockSize-1</code> words where <code>blockSize</code> is the number of input samples passed to <code>arm_fir_decimate_f32()</code>. - * <code>M</code> is the decimation factor. - */ - -arm_status arm_fir_decimate_init_f32( - arm_fir_decimate_instance_f32 * S, - uint16_t numTaps, - uint8_t M, - float32_t * pCoeffs, - float32_t * pState, - uint32_t blockSize) -{ - arm_status status; - - /* The size of the input block must be a multiple of the decimation factor */ - if((blockSize % M) != 0u) - { - /* Set status as ARM_MATH_LENGTH_ERROR */ - status = ARM_MATH_LENGTH_ERROR; - } - else - { - /* Assign filter taps */ - S->numTaps = numTaps; - - /* Assign coefficient pointer */ - S->pCoeffs = pCoeffs; - - /* Clear state buffer and size is always (blockSize + numTaps - 1) */ - memset(pState, 0, (numTaps + (blockSize - 1u)) * sizeof(float32_t)); - - /* Assign state pointer */ - S->pState = pState; - - /* Assign Decimation Factor */ - S->M = M; - - status = ARM_MATH_SUCCESS; - } - - return (status); - -} - -/** - * @} end of FIR_decimate group - */ |