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_fir_lattice_init_f32.c 00009 * 00010 * Description: Floating-point FIR Lattice filter initialization function. 00011 * 00012 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 00013 * 00014 * Version 1.0.10 2011/7/15 00015 * Big Endian support added and Merged M0 and M3/M4 Source code. 00016 * 00017 * Version 1.0.3 2010/11/29 00018 * Re-organized the CMSIS folders and updated documentation. 00019 * 00020 * Version 1.0.2 2010/11/11 00021 * Documentation updated. 00022 * 00023 * Version 1.0.1 2010/10/05 00024 * Production release and review comments incorporated. 00025 * 00026 * Version 1.0.0 2010/09/20 00027 * Production release and review comments incorporated 00028 * 00029 * Version 0.0.7 2010/06/10 00030 * Misra-C changes done 00031 * ---------------------------------------------------------------------------*/ 00032 00033 #include "arm_math.h" 00034 00053 void arm_fir_lattice_init_f32( 00054 arm_fir_lattice_instance_f32 * S, 00055 uint16_t numStages, 00056 float32_t * pCoeffs, 00057 float32_t * pState) 00058 { 00059 /* Assign filter taps */ 00060 S->numStages = numStages; 00061 00062 /* Assign coefficient pointer */ 00063 S->pCoeffs = pCoeffs; 00064 00065 /* Clear state buffer and size is always numStages */ 00066 memset(pState, 0, (numStages) * sizeof(float32_t)); 00067 00068 /* Assign state pointer */ 00069 S->pState = pState; 00070 00071 } 00072