72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
|
/* ----------------------------------------------------------------------
|
||
|
* Project: CMSIS DSP Library
|
||
|
* Title: arm_fir_lattice_init_q15.c
|
||
|
* Description: Q15 FIR Lattice filter initialization function
|
||
|
*
|
||
|
* $Date: 27. January 2017
|
||
|
* $Revision: V.1.5.1
|
||
|
*
|
||
|
* Target Processor: Cortex-M cores
|
||
|
* -------------------------------------------------------------------- */
|
||
|
/*
|
||
|
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
|
||
|
*
|
||
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
*
|
||
|
* Licensed under the Apache License, Version 2.0 (the License); you may
|
||
|
* not use this file except in compliance with the License.
|
||
|
* You may obtain a copy of the License at
|
||
|
*
|
||
|
* www.apache.org/licenses/LICENSE-2.0
|
||
|
*
|
||
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
|
||
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
* See the License for the specific language governing permissions and
|
||
|
* limitations under the License.
|
||
|
*/
|
||
|
|
||
|
#include "arm_math.h"
|
||
|
|
||
|
/**
|
||
|
* @ingroup groupFilters
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @addtogroup FIR_Lattice
|
||
|
* @{
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @brief Initialization function for the Q15 FIR lattice filter.
|
||
|
* @param[in] *S points to an instance of the Q15 FIR lattice structure.
|
||
|
* @param[in] numStages number of filter stages.
|
||
|
* @param[in] *pCoeffs points to the coefficient buffer. The array is of length numStages.
|
||
|
* @param[in] *pState points to the state buffer. The array is of length numStages.
|
||
|
* @return none.
|
||
|
*/
|
||
|
|
||
|
void arm_fir_lattice_init_q15(
|
||
|
arm_fir_lattice_instance_q15 * S,
|
||
|
uint16_t numStages,
|
||
|
q15_t * pCoeffs,
|
||
|
q15_t * pState)
|
||
|
{
|
||
|
/* Assign filter taps */
|
||
|
S->numStages = numStages;
|
||
|
|
||
|
/* Assign coefficient pointer */
|
||
|
S->pCoeffs = pCoeffs;
|
||
|
|
||
|
/* Clear state buffer and size is always numStages */
|
||
|
memset(pState, 0, (numStages) * sizeof(q15_t));
|
||
|
|
||
|
/* Assign state pointer */
|
||
|
S->pState = pState;
|
||
|
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @} end of FIR_Lattice group
|
||
|
*/
|