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# arm_fir_init_q7.c

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    00001 /* ----------------------------------------------------------------------
    00002 * Copyright (C) 2010 ARM Limited. All rights reserved.
    00003 *
    00004 * $Date:        29. November 2010
    00005 * $Revision:    V1.0.3
    00006 *
    00007 * Project:      CMSIS DSP Library
    00008 * Title:        arm_fir_init_q7.c
    00009 *
    00010 * Description:  Q7 FIR filter initialization function.
    00011 *
    00012 * Target Processor: Cortex-M4/Cortex-M3
    00013 *
    00014 * Version 1.0.3 2010/11/29
    00015 *    Re-organized the CMSIS folders and updated documentation.
    00016 *
    00017 * Version 1.0.2 2010/11/11
    00018 *    Documentation updated.
    00019 *
    00020 * Version 1.0.1 2010/10/05
    00021 *    Production release and review comments incorporated.
    00022 *
    00023 * Version 1.0.0 2010/09/20
    00024 *    Production release and review comments incorporated.
    00025 *
    00026 * Version 0.0.5  2010/04/26
    00027 *    incorporated review comments and updated with latest CMSIS layer
    00028 *
    00029 * Version 0.0.3  2010/03/10
    00030 *    Initial version
    00031 * ------------------------------------------------------------------- */
    00032
    00033 #include "arm_math.h"
    00034
    00062 void arm_fir_init_q7(
    00063   arm_fir_instance_q7 * S,
    00064   uint16_t numTaps,
    00065   q7_t * pCoeffs,
    00066   q7_t * pState,
    00067   uint32_t blockSize)
    00068 {
    00069
    00070   /* Assign filter taps */
    00071   S->numTaps = numTaps;
    00072
    00073   /* Assign coefficient pointer */
    00074   S->pCoeffs = pCoeffs;
    00075
    00076   /* Clear the state buffer.  The size is always (blockSize + numTaps - 1) */
    00077   memset(pState, 0, (numTaps + (blockSize - 1u)) * sizeof(q7_t));
    00078
    00079   /* Assign state pointer */
    00080   S->pState = pState;
    00081
    00082 }
    00083

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