CMSIS DSP Library from CMSIS 2.0. See http://www.onarm.com/cmsis/ for full details
Dependents: K22F_DSP_Matrix_least_square BNO055-ELEC3810 1BNO055 ECE4180Project--Slave2 ... more
arm_fir_lattice_init_q15.c
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_lattice_init_q15.c 00009 * 00010 * Description: Q15 FIR Lattice 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 0.0.7 2010/06/10 00027 * Misra-C changes done 00028 * ---------------------------------------------------------------------------*/ 00029 00030 #include "arm_math.h" 00031 00032 /** 00033 * @ingroup groupFilters 00034 */ 00035 00036 /** 00037 * @addtogroup FIR_Lattice 00038 * @{ 00039 */ 00040 00041 /** 00042 * @brief Initialization function for the Q15 FIR lattice filter. 00043 * @param[in] *S points to an instance of the Q15 FIR lattice structure. 00044 * @param[in] numStages number of filter stages. 00045 * @param[in] *pCoeffs points to the coefficient buffer. The array is of length numStages. 00046 * @param[in] *pState points to the state buffer. The array is of length numStages. 00047 * @return none. 00048 */ 00049 00050 void arm_fir_lattice_init_q15( 00051 arm_fir_lattice_instance_q15 * S, 00052 uint16_t numStages, 00053 q15_t * pCoeffs, 00054 q15_t * pState) 00055 { 00056 /* Assign filter taps */ 00057 S->numStages = numStages; 00058 00059 /* Assign coefficient pointer */ 00060 S->pCoeffs = pCoeffs; 00061 00062 /* Clear state buffer and size is always numStages */ 00063 memset(pState, 0, (numStages) * sizeof(q15_t)); 00064 00065 /* Assign state pointer */ 00066 S->pState = pState; 00067 00068 } 00069 00070 /** 00071 * @} end of FIR_Lattice group 00072 */
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