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# arm_fir_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_init_q31.c
    00009 *
    00010 * Description:  Q31 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 0.0.5  2010/04/26
    00030 *    incorporated review comments and updated with latest CMSIS layer
    00031 *
    00032 * Version 0.0.3  2010/03/10
    00033 *    Initial version
    00034 * -------------------------------------------------------------------- */
    00035
    00036 #include "arm_math.h"
    00037
    00068 void arm_fir_init_q31(
    00069   arm_fir_instance_q31 * S,
    00070   uint16_t numTaps,
    00071   q31_t * pCoeffs,
    00072   q31_t * pState,
    00073   uint32_t blockSize)
    00074 {
    00075   /* Assign filter taps */
    00076   S->numTaps = numTaps;
    00077
    00078   /* Assign coefficient pointer */
    00079   S->pCoeffs = pCoeffs;
    00080
    00081   /* Clear state buffer and state array size is (blockSize + numTaps - 1) */
    00082   memset(pState, 0, (blockSize + ((uint32_t) numTaps - 1u)) * sizeof(q31_t));
    00083
    00084   /* Assign state pointer */
    00085   S->pState = pState;
    00086
    00087 }
    00088

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