

#include "arm_math.h"

/**    
 * @addtogroup LMS    
 * @{    
 */

  /**    
   * @brief Initialization function for floating-point LMS filter.    
   * @param[in] *S points to an instance of the floating-point LMS filter structure.    
   * @param[in] numTaps  number of filter coefficients.    
   * @param[in] *pCoeffs points to the coefficient buffer.    
   * @param[in] *pState points to state buffer.    
   * @param[in] mu step size that controls filter coefficient updates.    
   * @param[in] blockSize number of samples to process.    
   * @return none.    
   */

/**    
 * \par Description:    
 * <code>pCoeffs</code> points to the array of filter coefficients stored in time reversed order:    
 * <pre>    
 *    {b[numTaps-1], b[numTaps-2], b[N-2], ..., b[1], b[0]}    
 * </pre>    
 * The initial filter coefficients serve as a starting point for the adaptive filter.    
 * <code>pState</code> points to an array of length <code>numTaps+blockSize-1</code> samples, where <code>blockSize</code> is the number of input samples processed by each call to <code>arm_lms_f32()</code>.    
 */

void arm_lms_init_f32(
  arm_lms_instance_f32 * S,
  uint16_t numTaps,
  float32_t * pCoeffs,
  float32_t * pState,
  float32_t mu,
  uint32_t blockSize)
{
  /* Assign filter taps */
  S->numTaps = numTaps;

  /* Assign coefficient pointer */
  S->pCoeffs = pCoeffs;

  /* Clear state buffer and size is always blockSize + numTaps */
  memset(pState, 0, (numTaps + (blockSize - 1)) * sizeof(float32_t));

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

  /* Assign Step size value */
  S->mu = mu;
}

/**    
 * @} end of LMS group    
 */
