Cortex-R DSP Software Library: arm_fir_init

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00001 /* ----------------------------------------------------------------------      
00002 * Copyright (C) 2011 ARM Limited. All rights reserved. 
00003 *      
00004 * $Date:        15. December 2011   
00005 * $Revision:    V2.0.0  
00006 *      
00007 * Project:      Cortex-R DSP Library 
00008 * Title:        arm_fir_init_q7.c      
00009 *      
00010 * Description:  Q7 FIR filter initialization function.      
00011 *      
00012 * Target Processor:          Cortex-R4/R5
00013 *
00014 * Version 1.0.0 2011/03/08
00015 *     Alpha release.
00016 *
00017 * Version 1.0.1 2011/09/30
00018 *     Beta release.
00019 *
00020 * Version 2.0.0 2011/12/15
00021 *     Final release. 
00022 * 
00023 * ------------------------------------------------------------------- */     
00024      
00025 #include "arm_math.h"     
00026      
00054 void arm_fir_init_q7(     
00055   arm_fir_instance_q7 * S,     
00056   uint16_t numTaps,     
00057   q7_t * pCoeffs,     
00058   q7_t * pState,     
00059   uint32_t blockSize)     
00060 {     
00061      
00062   /* Assign filter taps */     
00063   S->numTaps = numTaps;     
00064      
00065   /* Assign coefficient pointer */     
00066   S->pCoeffs = pCoeffs;     
00067      
00068   /* Clear the state buffer.  The size is always (blockSize + numTaps) */     
00069   memset(pState, 0, (numTaps + (blockSize)) * sizeof(q7_t));     
00070      
00071   /* Assign state pointer */     
00072   S->pState = pState;     
00073      
00074 }     
00075