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我對編碼非常陌生,並且由於Google無法修復的問題而倍受困擾(今天第二次)。我在Windows上使用Code Composer 4編寫代碼。我的代碼沒有錯誤,但fopen(「coffic.cof」,「w」)根本不會改變文件中的數據(如果文件被刪除,不會創建文件),也不能明白爲什麼。有任何想法嗎?將數據寫入.cof文件
#include "dsk6713_aic23.h" //codec-DSK support file
Uint32 fs=DSK6713_AIC23_FREQ_8KHZ; //set sampling rate
# include <stdio.h>
# include <math.h>
# include <stdlib.h>
#define pi 3.1415927
#include "coffic.cof"
void main()
{
double hpf, fs, fco, atn, fat, tp, k, ad, m, n, o, da, db, dc;
FILE *fp;
int c, d, e, f, g, h, i, q, r, s, t, u, v;
hpf = 0; //for a high-pass filter input 1, for a low-pass filter input 0
fs = 8000; //input samping frequency here
fco = 2400; //input cut-off frequency here
atn = 17; //input attenuation (dB) here
fat = 3500; //input the frequency of attenuation here
tp = 1/fs;
k = tan(pi*fco*tp);
ad = tan(pi*fat*tp);
m = (log10((pow(10,(atn/10)))-1))/(2*(log10(ad/k)));
o = abs(m);
n = ceil(o);
da = 1.414;
c = (pow(2,15)*k*k/(1+da*k+k*k));
d = (pow(2,15)*2*k*k/(1+da*k+k*k));
e = (pow(2,15)*k*k/(1+da*k+k*k));
q = (pow(2,15)*(2-2*k*k)/(1+da*k+k*k));
r = (pow(2,15)*(-1+k-k*k)/(1+da*k+k*k));
fp = fopen("U:\DSK6713\Ivo\CSP\coffic.cof", "w");
if (fp == NULL)
{
printf("Error. Unable to open coffic.cof");
exit(0);
}
fprintf(fp, "int a[3]={%d, d%, %d};\n", c, d, e);
fprintf(fp, "int b[3]={1, d%, %d};\n", q ,r);
fprintf(fp, "int x[3]={0,0,0};\nint y[3]={0,0,0};\n");
fflush(fp);
fclose(fp);
comm_intr(); //init DSK, codec, McBSP
while(1); //infinite loop
}
interrupt void c_int11() //interrupt service routine
{
short input;
FILE *fp;
fp = fopen("U:\DSK6713\Ivo\CSP\coffic.cof", "r");
if (fp == NULL)
{
printf("Error. Unable to open coffic.cof");
exit(0);
}
fclose(fp);
x[2]=x[1];
x[1]=x[0];
y[2]=y[1];
y[1]=y[0];
input=input_sample();
x[0]=input;
y[0]=a[0]*x[0]+a[1]*x[1]+a[2]*x[2]+b[1]*y[1]+b[2]*x[2];
y[0]=y[0]>>15;
input=(short)y[0];
output_sample(input); //output data
return;
}
'fp = fopen(「U:\ DSK6713 \ Ivo \ CSP \ coffic.cof」,「w」);'反斜槓標記轉義序列。 '\ D','\ I','\ C'和'\ c'都不是我聽說過的轉義序列。不是編譯器barf嗎? (應該是「U:\\ DSK6713 \\ Ivo \\ CSP \\ coffic.cof」。) – 2013-05-02 21:17:51