firtest1.c

来自「使用在TI DSP c54xx系列的 xdaix」· C语言 代码 · 共 73 行

/*
 *  Copyright 2003 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *
 *  @(#) XDAS 2.51.00 11-29-2003 (xdas-2.50.00.9)
 */
/*
 *  ======== firtest1.c ========
 *  This example shows how vendor specific extensions can 
 *  be used directly by an application.
 */
#include <std.h>
#include <log.h>
#include <fir_ti.h>

#ifdef _28_
#define far  
#endif

extern LOG_Obj trace;

#define NUMFRAMES   2

Int coeff[] = {1, 2, 3, 4, 4, 3, 2, 1};
Int inout[] = {1, 0, 0, 0, 0, 0, 0, 0, 0, 0};

#define FRAMELEN    ((sizeof (inout) / sizeof (Int)) / NUMFRAMES)
#define FILTERLEN   (sizeof (coeff) / sizeof (Int))

static Void display(Int a[], Int n);

/*
 *  ======== main ========
 */
Int main(Int argc, String argv[])
{
    FIR_TI_Params firParams;
    FIR_TI_Handle fir;
    
    FIR_TI_init();
    
    firParams = FIR_TI_PARAMS;
    firParams.filterLen = FILTERLEN;
    firParams.frameLen = FRAMELEN;
    firParams.coeffPtr = coeff;

    if ((fir = FIR_TI_create(&firParams)) != NULL) {
        FIR_TI_nApply(fir, inout, NUMFRAMES);   /* filter data in-place */
        display(inout, NUMFRAMES * FRAMELEN);   /* display the result */
        FIR_TI_delete(fir);                     /* delete the filter */
    }

    FIR_TI_exit();

    return (0);
}

/*
 *  ======== display ========
 */
static Void display(Int a[], Int n)
{
    Int i;
    
    for (i = 0; i < n; i++) {
        LOG_printf(&trace, "%d ", (Arg)a[i]);
    }

    LOG_printf(&trace, "\n");
}