firinput.c

来自「FIR（有限冲激相应）滤波器的DSP实现程序」· C语言 代码 · 共 21 行

#include <stdio.h>
#include <math.h>
void main()
{
int i;
double f[256];
FILE *fp;
if((fp=fopen("firin.inc","wt"))==NULL)
	{
	printf("can't open file! \n");
	return;
	}
for(i=0;i<=255;i++)
	{
		f[i]=sin(2*3.14159*i*1000/8000)+sin(2*3.14159*i*2500/8000);
		fprintf(fp,"	.word	%d\n",(long)(f[i]*32768/2));
	}
fclose(fp);
}