input.c

基于ADSP-219x系列的时间抽取基2FFT代码

#include <stdio.h>
#include <math.h>
//#define N 128

main()
{
    int i;
	int N;
	int M;
	float data[1024];
	FILE *r_file;
    FILE *i_file;
	char filename1[25]="inreal.dat";
    char filename2[25]="inimag.dat";
	printf("输入数据个数:");
	scanf("%d",&M);
	printf("输入数据:\n");
	for(i=0;i<M;i++) scanf("%f",&data[i]);
	printf("输入fft点数:");
	scanf("%d",&N);
	for(i=M;i<N;i++) data[i]=0;
	r_file=fopen(filename1,"w");
	for(i=0;i<N-1;i++) fprintf(r_file,"%f%c%c\n",data[i],'r',',');
	fprintf(r_file,"%s\n","0.000000r");
	fclose(r_file);
	i_file=fopen(filename2,"w");
	for(i=0;i<N-1;i++) fprintf(i_file,"%s\n","0.000000r,");
	fprintf(i_file,"%s\n","0.000000r");
	fclose(i_file);
	printf("\nFinished\n");
}