?? fir32.h
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/************************************************************************
*
* Copyright:
* Freescale Semiconductor, INC. All Rights Reserved.
* You are hereby granted a copyright license to use, modify, and
* distribute the SOFTWARE so long as this entire notice is
* retained without alteration in any modified and/or redistributed
* versions, and that such modified versions are clearly identified
* as such. No licenses are granted by implication, estoppel or
* otherwise under any patents or trademarks of Freescale Semiconductor,
* Inc. This software is provided on an "AS IS" basis and without warranty.
*
* To the maximum extent permitted by applicable law, FREESCALE
* DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, INCLUDING
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
* PURPOSE AND ANY WARRANTY AGAINST INFRINGEMENT WITH REGARD TO THE
* SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) AND ANY
* ACCOMPANYING WRITTEN MATERIALS.
*
* To the maximum extent permitted by applicable law, IN NO EVENT
* SHALL FREESCALE BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING
* WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
* INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
* LOSS) ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
*
* Freescale assumes no responsibility for the maintenance and support
* of this software
**********************************************
* FILE NAME: fir32.h
*
* PURPOSE: FIR32 module header file, containing general definitions and
* function prototypes for allocating/deallocating data structures
* for filter and computing a Finite Impulse Responce filter.
*
* AUTHOR: Andrey Butok
*********************************************/
#ifndef _FIR32_H_
#define _FIR32_H_
#include "fir.h"
/******************************************
*32-bit Fractional FIR Filter
******************************************/
typedef struct tFir32Struct
{
Frac32* pFirCoef; // Coefficients for FIR -> {a0,a1,a2...}
unsigned int iFirCoefCount; // Number of Coefficients
Frac32* pFirHistory; // Buffer for Save hisory between function calls-> {X1,X2,X3...}
unsigned int iFirHistoryCount; // Number of values in History Buffer
};
//Computes a Finite Impulse Response for a array of 32-bit fractional data values.
void FIR32_EMAC(struct tFir32Struct *pFIR, Frac32* pX, Frac32* pY, unsigned int n);
void FIR32_MAC(struct tFir32Struct *pFIR, Frac32* pX, Frac32* pY, unsigned int n);
//Performs the initalization for the FIR32 filter function.
struct tFir32Struct* FIR32Create( Frac32* pCoef, uint16 u16Num);
//Deallocates the data structure(s) initially allocated by FIR32Create.
void FIR32Destroy(struct tFir32Struct* pFirStruct);
#ifdef __EMAC
#define FIR32(w,x,y,z) FIR32_EMAC(w,x,y,z)
#else
#define FIR32(w,x,y,z) FIR32_MAC(w,x,y,z)
#endif
#endif //_FIR32_H_
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