arm_fir_lattice_init_q15.c
75 lines
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| text/x-c
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CLexer
r71 | /*----------------------------------------------------------------------------- | |||
* Copyright (C) 2010 ARM Limited. All rights reserved. | ||||
* | ||||
* $Date: 15. July 2011 | ||||
* $Revision: V1.0.10 | ||||
* | ||||
* Project: CMSIS DSP Library | ||||
* Title: arm_fir_lattice_init_q15.c | ||||
* | ||||
* Description: Q15 FIR Lattice filter initialization function. | ||||
* | ||||
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 | ||||
* | ||||
* Version 1.0.10 2011/7/15 | ||||
* Big Endian support added and Merged M0 and M3/M4 Source code. | ||||
* | ||||
* Version 1.0.3 2010/11/29 | ||||
* Re-organized the CMSIS folders and updated documentation. | ||||
* | ||||
* Version 1.0.2 2010/11/11 | ||||
* Documentation updated. | ||||
* | ||||
* Version 1.0.1 2010/10/05 | ||||
* Production release and review comments incorporated. | ||||
* | ||||
* Version 1.0.0 2010/09/20 | ||||
* Production release and review comments incorporated | ||||
* | ||||
* Version 0.0.7 2010/06/10 | ||||
* Misra-C changes done | ||||
* ---------------------------------------------------------------------------*/ | ||||
#include "arm_math.h" | ||||
/** | ||||
* @ingroup groupFilters | ||||
*/ | ||||
/** | ||||
* @addtogroup FIR_Lattice | ||||
* @{ | ||||
*/ | ||||
/** | ||||
* @brief Initialization function for the Q15 FIR lattice filter. | ||||
* @param[in] *S points to an instance of the Q15 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_q15( | ||||
arm_fir_lattice_instance_q15 * S, | ||||
uint16_t numStages, | ||||
q15_t * pCoeffs, | ||||
q15_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(q15_t)); | ||||
/* Assign state pointer */ | ||||
S->pState = pState; | ||||
} | ||||
/** | ||||
* @} end of FIR_Lattice group | ||||
*/ | ||||