/*-----------------------------------------------------------------------------    
* Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
*    
* $Date:        12. March 2014
* $Revision: 	V1.4.4
*    
* Project: 	    CMSIS DSP Library    
* Title:        arm_fir_lattice_init_f32.c    
*    
* Description:  Floating-point FIR Lattice filter initialization function.    
*    
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
*  
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions
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*     notice, this list of conditions and the following disclaimer.
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in
*     the documentation and/or other materials provided with the 
*     distribution.
*   - Neither the name of ARM LIMITED nor the names of its contributors
*     may be used to endorse or promote products derived from this
*     software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* ---------------------------------------------------------------------------*/

#include "arm_math.h"

/**    
 * @ingroup groupFilters    
 */

/**    
 * @addtogroup FIR_Lattice    
 * @{    
 */

/**    
 * @brief Initialization function for the floating-point FIR lattice filter.    
 * @param[in] *S points to an instance of the floating-point 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_f32(
  arm_fir_lattice_instance_f32 * S,
  uint16_t numStages,
  float32_t * pCoeffs,
  float32_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(float32_t));

  /* Assign state pointer */
  S->pState = pState;

}

/**    
 * @} end of FIR_Lattice group    
 */
