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Diffstat (limited to 'DSP_Lib/Source/FilteringFunctions/arm_lms_norm_init_q31.c')
| -rw-r--r-- | DSP_Lib/Source/FilteringFunctions/arm_lms_norm_init_q31.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/DSP_Lib/Source/FilteringFunctions/arm_lms_norm_init_q31.c b/DSP_Lib/Source/FilteringFunctions/arm_lms_norm_init_q31.c deleted file mode 100644 index 9ada3a0..0000000 --- a/DSP_Lib/Source/FilteringFunctions/arm_lms_norm_init_q31.c +++ /dev/null @@ -1,111 +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_lms_norm_init_q31.c -* -* Description: Q31 NLMS 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" - -/** - * @addtogroup LMS_NORM - * @{ - */ - - /** - * @brief Initialization function for Q31 normalized LMS filter. - * @param[in] *S points to an instance of the Q31 normalized LMS filter structure. - * @param[in] numTaps number of filter coefficients. - * @param[in] *pCoeffs points to coefficient buffer. - * @param[in] *pState points to state buffer. - * @param[in] mu step size that controls filter coefficient updates. - * @param[in] blockSize number of samples to process. - * @param[in] postShift bit shift applied to coefficients. - * @return none. - * - * <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> - * The initial filter coefficients serve as a starting point for the adaptive filter. - * <code>pState</code> points to an array of length <code>numTaps+blockSize-1</code> samples, - * where <code>blockSize</code> is the number of input samples processed by each call to <code>arm_lms_norm_q31()</code>. - */ - -void arm_lms_norm_init_q31( - arm_lms_norm_instance_q31 * S, - uint16_t numTaps, - q31_t * pCoeffs, - q31_t * pState, - q31_t mu, - uint32_t blockSize, - uint8_t postShift) -{ - /* 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(q31_t)); - - /* Assign post Shift value applied to coefficients */ - S->postShift = postShift; - - /* Assign state pointer */ - S->pState = pState; - - /* Assign Step size value */ - S->mu = mu; - - /* Initialize reciprocal pointer table */ - S->recipTable = (q31_t *) armRecipTableQ31; - - /* Initialise Energy to zero */ - S->energy = 0; - - /* Initialise x0 to zero */ - S->x0 = 0; - -} - -/** - * @} end of LMS_NORM group - */ |