fir_t.c

使用TI公司提供的用于C/C++语言开发的CCS平台进行FIR滤波器的开发

//*****************************************************************************
//  Filename:	 fir_t.c
//  Version:	 0.01
//  Description: test for fir routine
//*****************************************************************************

#include <math.h>
#include <tms320.h>
#include <dsplib.h>

#include "test.h"
#define pi 3.1415926
short i;
short j;
short eflag1= PASS;
short eflag2= PASS;
DATA  *dbptr = &db[0];

void main(void)
{
    /* 1. Test for single-buffer */

    /* clear */
    for (i=0; i<NX; i++) r[i] = 0;	     // clear output buffer (optional)
    for (i=0; i<NH; i++) db[i] = 0; // clear delay buffer (a must)
	for (i=0; i<NX; i++)
	{
		x[i]=100*(sin(2*pi*i*0.08)+sin(2*pi*i*0.3)+sin(2*pi*i*0.5));
	}
	/*

	h[0]=0.6037;h[1]=0.70545;h[2]=0.79659;h[3]=0.87386;
	h[4]=0.93443;h[5]=0.9761;h[6]=0.99733;h[7]=0.99733;
	h[8]=0.9761;h[9]=0.93443;h[10]=0.87386;h[11]=0.79659;
	h[12]=0.70545;h[13]=0.6037;
	*/
    /* compute */
    
	h[0]=-532;
	h[1]=-2;
	h[2]=1883;
	h[3]=3765;
	h[4]=3765;
	h[5]=1883;
	h[6]=-2;
	h[7]=-532;

    fir(x, h, r, &dbptr, 8, NX);
	/*
	for(i=NX;i>NH;i--)
	{
		for(j=0;j<NH;j++)
		{
			r[i]=r[i]+x[i+j-NH]*h[j];
		}
	}
	*/
    /* test */
    //eflag1 = test (r, rtest, NX, MAXERROR);

    /* 2. Tests for dual-buffer */
    /* clear */
    //for (i=0; i<NX; i++) r[i] = 0;	     // clear output buffer (optional)
    //for (i=0; i<NH; i++) db[i] = 0; // clear delay buffer (a must)

    //dbptr = &db[0];

    /* compute */
    //if (NX>=4)
    //{
    //    fir(x, h, r, &dbptr, NH, NX/4);
    //    fir(&x[NX/4], h, &r[NX/4], &dbptr, NH, NX/4);
    //    fir(&x[2*NX/4], h, &r[2*NX/4], &dbptr, NH, NX/4);
    //    fir(&x[3*NX/4], h, &r[3*NX/4], &dbptr, NH, NX/4);
    // }

    /* test */
    //eflag2 = test (r, rtest, NX, MAXERROR);

    //if (eflag1 != PASS)
    //{
    //    exit(-1);
    //}

    //if (eflag2 != PASS)
    //{
    //    exit(-2);
    //}

    return;
}