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# arm_fir_sparse_init_q31.c

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    00001 /* ----------------------------------------------------------------------
    00002 * Copyright (C) 2010 ARM Limited. All rights reserved.
    00003 *
    00004 * $Date:        15. July 2011
    00005 * $Revision:    V1.0.10
    00006 *
    00007 * Project:      CMSIS DSP Library
    00008 * Title:        arm_fir_sparse_init_q31.c
    00009 *
    00010 * Description:  Q31 sparse FIR filter initialization function.
    00011 *
    00012 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
    00013 *
    00014 * Version 1.0.10 2011/7/15
    00015 *    Big Endian support added and Merged M0 and M3/M4 Source code.
    00016 *
    00017 * Version 1.0.3 2010/11/29
    00018 *    Re-organized the CMSIS folders and updated documentation.
    00019 *
    00020 * Version 1.0.2 2010/11/11
    00021 *    Documentation updated.
    00022 *
    00023 * Version 1.0.1 2010/10/05
    00024 *    Production release and review comments incorporated.
    00025 *
    00026 * Version 1.0.0 2010/09/20
    00027 *    Production release and review comments incorporated
    00028 *
    00029 * Version 0.0.7  2010/06/10
    00030 *    Misra-C changes done
    00031 * ---------------------------------------------------------------------------*/
    00032
    00033 #include "arm_math.h"
    00034
    00064 void arm_fir_sparse_init_q31(
    00065   arm_fir_sparse_instance_q31 * S,
    00066   uint16_t numTaps,
    00067   q31_t * pCoeffs,
    00068   q31_t * pState,
    00069   int32_t * pTapDelay,
    00070   uint16_t maxDelay,
    00071   uint32_t blockSize)
    00072 {
    00073   /* Assign filter taps */
    00074   S->numTaps = numTaps;
    00075
    00076   /* Assign coefficient pointer */
    00077   S->pCoeffs = pCoeffs;
    00078
    00079   /* Assign TapDelay pointer */
    00080   S->pTapDelay = pTapDelay;
    00081
    00082   /* Assign MaxDelay */
    00083   S->maxDelay = maxDelay;
    00084
    00085   /* reset the stateIndex to 0 */
    00086   S->stateIndex = 0u;
    00087
    00088   /* Clear state buffer and size is always maxDelay + blockSize */
    00089   memset(pState, 0, (maxDelay + blockSize) * sizeof(q31_t));
    00090
    00091   /* Assign state pointer */
    00092   S->pState = pState;
    00093
    00094 }
    00095

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