GtkWidget *init_psk() {
int i;
psk_index=0;
detector=createPSKDet(8000);
if(detector==NULL) {
fprintf(stderr,"init_psk: createPSKDet return null!\n");
return NULL;
}
SetRXFrequency(detector,1500);
ResetDetector(detector);
for(i=0;i<TEXT_LINES;i++) {
text_label[i][0]='\0';
}
build_temp_text();
psk_label=gtk_label_new(temp_text);
gtk_label_set_single_line_mode (GTK_LABEL(psk_label), FALSE);
gtk_label_set_width_chars (GTK_LABEL(psk_label), 80);
gtk_label_set_lines (GTK_LABEL(psk_label), TEXT_LINES);
gtk_label_set_line_wrap (GTK_LABEL(psk_label), TRUE);
gtk_misc_set_alignment (GTK_MISC(psk_label), 0, 0);
//gtk_widget_set_halign(psk_label,GTK_ALIGN_START);
//gtk_widget_set_valign(psk_label,GTK_ALIGN_START);
return psk_label;
}
void Acquire ( void ){
//extern double NCO_Frequency;
extern int count;
extern int char_count;
//extern unsigned int FFT_Display[];
long i, S1, S2, W;
double delta;
/* this is where I add a correction to the NCO frequency
based on the nearby spectral peaks */
S1 = 0;
S2 = 0;
delta = 0.;
//for (i=-2; i<3; i++){
for (i=-4; i<5; i++){
W = (long)FFT_Display[NCO_Point + i];
S1 += W*i;
S2 += W;
}
if (S2 != 0) delta = (double) S1/((double)S2);
NCO_Frequency += (double)((float)delta * 15.625);
SetRXFrequency (NCO_Frequency );
count = 0;
char_count = 0;
}
void psk_set_frequency(int f) {
if(detector!=NULL) {
SetRXFrequency(detector,f);
ResetDetector(detector);
}
}
