CMSIS DSP Software Library: arm_biquad_cascade_df2T_init_f32.c Source File

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# arm_biquad_cascade_df2T_init_f32.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_biquad_cascade_df2T_init_f32.c
    00009 *
    00010 * Description:  Initialization function for the floating-point transposed
    00011 *               direct form II Biquad cascade filter.
    00012 *
    00013 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
    00014 *
    00015 * Version 1.0.10 2011/7/15
    00016 *    Big Endian support added and Merged M0 and M3/M4 Source code.
    00017 *
    00018 * Version 1.0.3 2010/11/29
    00019 *    Re-organized the CMSIS folders and updated documentation.
    00020 *
    00021 * Version 1.0.2 2010/11/11
    00022 *    Documentation updated.
    00023 *
    00024 * Version 1.0.1 2010/10/05
    00025 *    Production release and review comments incorporated.
    00026 *
    00027 * Version 1.0.0 2010/09/20
    00028 *    Production release and review comments incorporated
    00029 *
    00030 * Version 0.0.7  2010/06/10
    00031 *    Misra-C changes done
    00032 * ---------------------------------------------------------------------------*/
    00033
    00034 #include "arm_math.h"
    00035
    00073 void arm_biquad_cascade_df2T_init_f32(
    00074   arm_biquad_cascade_df2T_instance_f32 * S,
    00075   uint8_t numStages,
    00076   float32_t * pCoeffs,
    00077   float32_t * pState)
    00078 {
    00079   /* Assign filter stages */
    00080   S->numStages = numStages;
    00081
    00082   /* Assign coefficient pointer */
    00083   S->pCoeffs = pCoeffs;
    00084
    00085   /* Clear state buffer and size is always 2 * numStages */
    00086   memset(pState, 0, (2u * (uint32_t) numStages) * sizeof(float32_t));
    00087
    00088   /* Assign state pointer */
    00089   S->pState = pState;
    00090 }
    00091

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