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/* ==================================================================
File name : FIR.H
Originator : Advanced Embeeded Control (AEC)
Texas Instruments Inc.
Description:
Header file containing object definitions, proto type declaration and
default object initializers for FIR Filter.
===================================================================
History:
-------------------------------------------------------------------
12-05-2002 Release Rev 1.0
-------------------------------------------------------------------*/
#ifndef __FIR_H__
#define __FIR_H__
#define NULL 0
/*----------------------------------------------------------------
Define the structure of the FIRFILT_GEN Filter Module
-----------------------------------------------------------------*/
typedef struct {
long *coeff_ptr; /* Pointer to Filter coefficient */
long * dbuffer_ptr;/* Delay buffer ptr */
int cbindex; /* Circular Buffer Index */
int order; /* Order of the Filter */
int input; /* Latest Input sample */
int output; /* Filter Output */
void (*init)(void *); /* Ptr to Init funtion */
void (*calc)(void *); /* Ptr to calc fn */
}FIR16;
/*---------------------------------------------------------------
Define a Handles for the Filter Modules
-----------------------------------------------------------------*/
typedef FIR16 *FIR16_handle;
#define FIR16_DEFAULTS { (long *)NULL, \
(long *)NULL, \
0, \
50, \
0, \
0, \
(void (*)(void *))FIR16_init,\
(void (*)(void *))FIR16_calc}
/*-------------------------------------------------------------
Prototypes for the functions
---------------------------------------------------------------*/
void FIR16_calc(void *);
void FIR16_init(void *);
/*********** Sample FIR Co-efficients **************************/
/* Even Order (50): LPF co-efficients for FIR16 module */
#define FIR16_LPF50 {\
9839,-2219809,-1436900,853008,3340889,3668111,-896,-5963392,-8977456,-3669326,\
8585216,18152991,13041193,-8257663,-30867258,-31522540,131,45285320,64028535,25231269,\
-58654721,-124846025,-94830542,68157453,320667626,551550942}
/* Even Order (50): HPF co-efficients for FIR16 module */
#define FIR16_HPF50 {\
19646,55659,2290741,1640376,-2094815,-4259840,-1447,7011622,5440090,-6946006,\
-13959169,64971,21102301,15728880,-19070655,-37027840,-214,53149590,39452755,-47841174,\
-94765057,65471,153223136,129499161,-197853150,-647299072}
/* Even Order (50): HPF co-efficients for FIR16 module */
#define FIR16_BPF50 {\
6543,65535,4581487,-1,-4124098,0,-2890,-1,10945715,-65536,\
-27918337,65535,42139067,-1,-38075774,-65536,-427,65535,78839975,-1,\
-189333505,0,306118593,-1,-395378619,-65536}
/* Even Order (50): BSF co-efficients for FIR16 module */
#define FIR16_BSF50 {\
26267,396754944,6054,-307232768,-4688,190054400,2900,-79167488,-1208,-65536,\
-1,38141952,-64954,-42270721,-645,27983872,427,-11075584,-169,-65536,\
-65537,4063231,62,-4587520,-65606,-1}
/* Odd Order (51): LPF co-efficients for FIR16 module */
#define FIR16_LPF51 {\
-1956603,-2090327,-455862,2424384,4257913,2554383,-3145945,-8846556,-7928922,2163047,\
15269587,18611676,3997368,-21495748,-35913445,-19726104,23527457,61276039,52756345,-14155825,\
-99680218,-126287808,-29360092,189464569,447348704,621150178}
/* Odd Order (51): LPF co-efficients for FIR16 module */
#define FIR16_BPF51 {\
-3010057,3272381,3469336,-3404284,-2749505,1242809,-1509064,5637229,11076189,-17432751,\
-23789423,29032093,31718962,-30277149,-23264838,9567893,-11403531,39649449,74252374,-113704984,\
-155647982,197132246,235208652,-266862540,-289603535,301465554}
#endif