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control.c
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control.c
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// $Id: control.c,v 1.17 2018/12/05 07:08:01 karn Exp $
// Thread to display internal state of 'radio' and accept single-letter commands
// Why are user interfaces always the biggest, ugliest and buggiest part of any program?
// Copyright 2017 Phil Karn, KA9Q
#define _GNU_SOURCE 1
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <pthread.h>
#include <string.h>
#if defined(linux)
#include <bsd/string.h>
#endif
#include <math.h>
#include <complex.h>
#undef I
#include <sys/time.h>
#include <ncurses.h>
#include <ctype.h>
#include <sys/socket.h>
#include <netdb.h>
#include <locale.h>
#include "misc.h"
#include "dsp.h"
#include "radio.h"
#include "filter.h"
#include "multicast.h"
#include "bandplan.h"
#include "status.h"
float Spare; // General purpose knob for experiments
// Touch screen position (Raspberry Pi display only - experimental)
int touch_x,touch_y;
int Update_interval = 100;
// Screen location of field modification cursor
int mod_x,mod_y;
int Mcast_ttl;
char Libdir[] = "/usr/local/share/ka9q-radio";
char Locale[256] = "en_US.UTF-8";
void *demod_am(void *arg){
return NULL;
}
void *demod_fm(void *arg){
return NULL;
}
void *demod_linear(void *arg){
return NULL;
}
// Pop up a temporary window with the contents of a file in the
// library directory (usually /usr/local/share/ka9q-radio/)
// then wait for a single keyboard character to clear it
void popup(const char *filename){
static const int maxcols = 256;
char fname[PATH_MAX];
snprintf(fname,sizeof(fname),"%s/%s",Libdir,filename);
FILE *fp;
if((fp = fopen(fname,"r")) == NULL)
return;
// Determine size of box
int rows=0, cols=0;
char line[maxcols];
while(fgets(line,sizeof(line),fp) != NULL){
chomp(line);
rows++;
if(strlen(line) > cols)
cols = strlen(line); // Longest line
}
rewind(fp);
// Allow room for box
WINDOW * const pop = newwin(rows+2,cols+2,0,0);
box(pop,0,0);
int row = 1; // Start inside box
while(fgets(line,sizeof(line),fp) != NULL){
chomp(line);
mvwaddstr(pop,row++,1,line);
}
fclose(fp);
wnoutrefresh(pop);
doupdate();
timeout(-1); // blocking read - wait indefinitely
(void)getch(); // Read and discard one character
timeout(Update_interval);
werase(pop);
wrefresh(pop);
delwin(pop);
}
// Pop up a dialog box, issue a prompt and get a response
void getentry(char const *prompt,char *response,int len){
WINDOW *pwin = newwin(5,90,15,0);
box(pwin,0,0);
mvwaddstr(pwin,1,1,prompt);
wrefresh(pwin);
echo();
timeout(-1);
// Manpage for wgetnstr doesn't say whether a terminating
// null is stashed. Hard to believe it isn't, but this is to be sure
memset(response,0,len);
wgetnstr(pwin,response,len);
chomp(response);
timeout(Update_interval);
noecho();
werase(pwin);
wrefresh(pwin);
delwin(pwin);
}
static FILE *Tty;
static SCREEN *Term;
void display_cleanup(void){
echo();
nocbreak();
endwin();
if(Term)
delscreen(Term);
Term = NULL;
if(Tty)
fclose(Tty);
Tty = NULL;
}
static int Frequency_lock;
// Adjust the selected item up or down one step
void adjust_item(struct demod *demod,int direction){
double tunestep;
tunestep = pow(10., (double)demod->tune.step);
if(!direction)
tunestep = - tunestep;
switch(demod->tune.item){
case 0: // Carrier frequency
case 1: // Center frequency - treat the same
if(!Frequency_lock) // Ignore if locked
demod->tune.freq += tunestep;
break;
case 2: // First LO
if(demod->tune.lock) // Tuner is locked, don't change it
break;
// Keep frequency but move LO2, which will move LO1 (if it can move)
double new_lo2 = demod->second_LO.freq + tunestep;
demod->tune.freq += new_lo2;
break;
case 3: // IF
demod->second_LO.freq -= tunestep;
break;
case 4: // Filter low edge
demod->filter.low += tunestep;
break;
case 5: // Filter high edge
demod->filter.high += tunestep;
break;
case 6: // Post-detection audio frequency shift
demod->shift.freq += tunestep;
break;
case 7: // Kaiser window beta parameter for filter
demod->filter.kaiser_beta += tunestep;
if(demod->filter.kaiser_beta < 0)
demod->filter.kaiser_beta = 0;
break;
}
}
// Hooks for knob.c (experimental)
// It seems better to just use the Griffin application to turn knob events into keystrokes or mouse events
void adjust_up(void *arg){
struct demod *demod = arg;
adjust_item(demod,1);
}
void adjust_down(void *arg){
struct demod *demod = arg;
adjust_item(demod,0);
}
void toggle_lock(void *arg){
struct demod *demod = arg;
switch(demod->tune.item){
case 0:
case 1:
Frequency_lock = !Frequency_lock; // Toggle frequency tuning lock
break;
case 2:
demod->tune.lock = !demod->tune.lock;
}
}
struct demod Demod;
float Noise_bandwidth;
int Netsock;
void decode_status(struct demod *demod,unsigned char *buffer,int length){
unsigned char *cp = buffer;
while(cp - buffer < length){
enum status_type type = *cp++; // increment cp to length field
if(type == EOL)
break; // End of list
unsigned int len = *cp++;
if(cp - buffer + len >= length)
break; // Invalid length
switch(type){
case EOL: // Shouldn't get here
goto done;
case INPUT_SOURCE_SOCKET:
if(len == 6){
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)&demod->input.source_address;
sin->sin_family = AF_INET;
memcpy(&sin->sin_addr.s_addr,cp,4);
memcpy(&sin->sin_port,cp+4,2);
} else if(len == 8){
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)&demod->input.source_address;
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr,cp,8);
memcpy(&sin6->sin6_port,cp+8,2);
}
break;
#if 0
case INPUT_DEST_SOCKET:
if(len == 6){
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)&demod->input.dest_address;
sin->sin_family = AF_INET;
memcpy(&sin->sin_addr.s_addr,cp,4);
memcpy(&sin->sin_port,cp+4,2);
} else if(len == 8){
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)&demod->input.dest_address;
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr,8);
memcpy(&sin6->sin6_port,cp+8,2);
}
break;
#endif
case INPUT_SSRC:
demod->input.rtp.ssrc = decode_int(cp,len);
break;
case INPUT_SAMPRATE:
demod->input.samprate = demod->sdr.status.samprate = decode_int(cp,len);
break;
case INPUT_PACKETS:
demod->input.rtp.packets = decode_int(cp,len);
break;
case INPUT_SAMPLES:
demod->input.samples = decode_int(cp,len);
break;
case INPUT_DROPS:
demod->input.rtp.drops = decode_int(cp,len);
break;
case INPUT_DUPES:
demod->input.rtp.dupes = decode_int(cp,len);
break;
#if 0
case OUTPUT_DEST_SOCKET:
if(len == 6){
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)&demod->input.dest_address;
sin->sin_family = AF_INET;
memcpy(&sin->sin_addr.s_addr,cp,4);
memcpy(&sin->sin_port,cp+4,2);
} else if(len == 8){
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)&demod->input.dest_address;
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr,8);
memcpy(&sin6->sin6_port,cp+8,2);
}
break;
#endif
case OUTPUT_SSRC:
demod->output.rtp.ssrc = decode_int(cp,len);
break;
case OUTPUT_TTL:
Mcast_ttl = decode_int(cp,len);
break;
case OUTPUT_SAMPRATE:
demod->output.samprate = decode_int(cp,len);
break;
case OUTPUT_PACKETS:
demod->output.rtp.packets = decode_int(cp,len);
break;
case RADIO_FREQUENCY:
demod->tune.freq = decode_double(cp,len);
break;
case FIRST_LO_FREQUENCY:
demod->sdr.status.frequency = decode_double(cp,len);
break;
case SECOND_LO_FREQUENCY:
demod->second_LO.freq = decode_double(cp,len);
break;
case SHIFT_FREQUENCY:
demod->shift.freq = decode_double(cp,len);
break;
case DOPPLER_FREQUENCY:
demod->doppler.freq = decode_double(cp,len);
break;
case DOPPLER_FREQUENCY_RATE:
demod->doppler.rate = decode_double(cp,len);
break;
case LNA_GAIN:
demod->sdr.status.lna_gain = decode_int(cp,len);
break;
case MIXER_GAIN:
demod->sdr.status.mixer_gain = decode_int(cp,len);
break;
case IF_GAIN:
demod->sdr.status.if_gain = decode_int(cp,len);
break;
case DC_I_OFFSET:
break;
case DC_Q_OFFSET:
break;
case IQ_IMBALANCE:
break;
case IQ_PHASE:
break;
case LOW_EDGE:
demod->filter.low = decode_float(cp,len);
break;
case HIGH_EDGE:
demod->filter.high = decode_float(cp,len);
break;
case KAISER_BETA:
demod->filter.kaiser_beta = decode_float(cp,len);
break;
case FILTER_BLOCKSIZE:
demod->filter.L = decode_int(cp,len);
break;
case FILTER_FIR_LENGTH:
demod->filter.M = decode_int(cp,len);
break;
case NOISE_BANDWIDTH:
Noise_bandwidth = decode_float(cp,len);
break;
case IF_POWER:
demod->sig.if_power = decode_float(cp,len);
break;
case BASEBAND_POWER:
demod->sig.bb_power = decode_float(cp,len);
break;
case NOISE_DENSITY:
demod->sig.n0 = decode_float(cp,len);
break;
case RADIO_MODE:
strncpy(demod->mode,(char *)cp,sizeof(demod->mode));
demod->mode[len] = '\0';
break;
case DEMOD_MODE:
demod->demod_type = decode_int(cp,len); // ????
break;
case INDEPENDENT_SIDEBAND:
demod->filter.isb = decode_int(cp,len);
break;
case DEMOD_SNR:
demod->sig.snr = decode_float(cp,len);
break;
case DEMOD_GAIN:
demod->agc.gain = decode_float(cp,len);
break;
case FREQ_OFFSET:
demod->sig.foffset = decode_float(cp,len);
break;
case PEAK_DEVIATION:
demod->sig.pdeviation = decode_float(cp,len);
break;
case PL_TONE:
demod->sig.plfreq = decode_float(cp,len);
break;
case PLL_LOCK:
demod->sig.pll_lock = decode_int(cp,len);
break;
case PLL_SQUARE:
demod->opt.square = decode_int(cp,len);
break;
case PLL_PHASE:
demod->sig.cphase = decode_float(cp,len);
break;
case OUTPUT_CHANNELS:
demod->output.channels = decode_int(cp,len);
break;
default:
break;
}
cp += len;
}
done:;
}
// Thread to display receiver state, updated at 10Hz by default
// Uses the ancient ncurses text windowing library
// Also services keyboard, mouse and tuning knob, if present
// I had been running this at normal priority, but it can start new demodulators
// so it must also run at preferred priority
int main(int argc,char *argv[]){
{
// The display thread assumes en_US.UTF-8, or anything with a thousands grouping character
// Otherwise the cursor movements will be wrong
char const * const cp = getenv("LANG");
if(cp != NULL){
strlcpy(Locale,cp,sizeof(Locale));
}
}
setlocale(LC_ALL,Locale); // Set either the hardwired default or the value of $LANG if it exists
struct demod * const demod = &Demod;
Netsock = setup_mcast("239.1.1.2:5006",NULL,0,1,0);
fprintf(stderr,"Netsock %d\n",Netsock);
#if 0
#ifdef linux
extern void *knob(void *);
pthread_t pthread_knob;
pthread_create(&pthread_knob,NULL,knob,demod);
extern void *touch(void *);
pthread_t pthread_touch;
pthread_create(&pthread_touch,NULL,touch,demod); // Disable for now
#endif
#endif
atexit(display_cleanup);
// talk directly to the terminal
Tty = fopen("/dev/tty","r+");
Term = newterm(NULL,Tty,Tty);
set_term(Term);
keypad(stdscr,TRUE);
timeout(Update_interval); // update interval when nothing is typed
cbreak();
noecho();
// Set up display subwindows
int row = 0;
int col = 0;
WINDOW * const tuning = newwin(8,35,row,col); // Frequency information
col += 35;
WINDOW * const sig = newwin(8,25,row,col); // Signal information
col += 25;
WINDOW * const info = newwin(8,42,row,col); // Band information
row += 8;
col = 0;
WINDOW * const filtering = newwin(12,22,row,col);
col += 22;
WINDOW * const demodulator = newwin(12,25,row,col);
col += 25;
WINDOW * const options = newwin(12,12,row,col); // Demod options
col += 12;
WINDOW * const sdr = newwin(12,25,row,col); // SDR information
col += 25;
WINDOW * const modes = newwin(Nmodes+2,7,row,col);
col += Nmodes+2;
col = 0;
row += 12;
WINDOW * const network = newwin(8,78,row,col); // Network status information
col = 0;
row += 8;
WINDOW * const debug = newwin(8,78,row,col); // Note: overlaps function keys
scrollok(debug,1);
// A message from our sponsor...
wprintw(debug,"KA9Q SDR Receiver v1.0; Copyright 2017-2018 Phil Karn\n");
wprintw(debug,"Compiled on %s at %s\n",__DATE__,__TIME__);
struct sockaddr old_input_source_address;
memset(&old_input_source_address,0,sizeof(old_input_source_address));
char source[NI_MAXHOST];
char sport[NI_MAXSERV];
memset(source,0,sizeof(source));
memset(sport,0,sizeof(sport));
mmask_t mask = ALL_MOUSE_EVENTS;
mousemask(mask,NULL);
MEVENT mouse_event;
for(;;){
unsigned char buffer[8192];
memset(buffer,0,sizeof(buffer));
int n = recv(Netsock,buffer,sizeof(buffer),0);
if(n <= 0){
sleep(1);
continue;
}
// Parse entries
int cr = buffer[0]; // Command/response byte
if(cr == 1)
continue; // Ignore commands
decode_status(demod,buffer+1,sizeof(buffer)-1);
// update display indefinitely, handle user commands
// Tuning control window - these can be adjusted by the user
// using the keyboard or tuning knob, so be careful with formatting
wmove(tuning,0,0);
int row = 1;
int col = 1;
if(Frequency_lock)
wattron(tuning,A_UNDERLINE); // Underscore means the frequency is locked
mvwprintw(tuning,row,col,"%'28.3f Hz",demod->tune.freq); // RF carrier frequency
mvwaddstr(tuning,row,col,"Carrier");
row++;
// Center of passband
mvwprintw(tuning,row,col,"%'28.3f Hz",demod->tune.freq + (demod->filter.high + demod->filter.low)/2);
mvwaddstr(tuning,row++,col,"Center");
wattroff(tuning,A_UNDERLINE);
if(demod->tune.lock)
wattron(tuning,A_UNDERLINE);
// second LO frequency is negative of IF, i.e., a signal at +48 kHz
// needs a second LO frequency of -48 kHz to bring it to zero
mvwprintw(tuning,row,col,"%'28.3f Hz",demod->sdr.status.frequency);
mvwaddstr(tuning,row++,col,"First LO");
wattroff(tuning,A_UNDERLINE);
mvwprintw(tuning,row,col,"%'28.3f Hz",-demod->second_LO.freq);
mvwaddstr(tuning,row++,col,"IF");
// Doppler info displayed only if active
double dopp = demod->doppler.freq;
if(dopp != 0){
mvwprintw(tuning,row,col,"%'28.3f Hz",dopp);
mvwaddstr(tuning,row++,col,"Doppler");
mvwprintw(tuning,row,col,"%'28.3f Hz/s",demod->doppler.rate);
mvwaddstr(tuning,row++,col,"Dop rate");
}
wmove(tuning,row,0);
wclrtobot(tuning);
box(tuning,0,0);
mvwaddstr(tuning,0,15,"Tuning");
// Display ham band emission data, if available
// Lines are variable length, so clear window before starting
wclrtobot(info); // Output
row = 1;
mvwprintw(info,row++,1,"Receiver profile: %s",demod->mode);
if(demod->doppler_command)
mvwprintw(info,row++,1,"Doppler: %s",demod->doppler_command);
struct bandplan const *bp_low,*bp_high;
bp_low = lookup_frequency(demod->tune.freq + demod->filter.low);
bp_high = lookup_frequency(demod->tune.freq + demod->filter.high);
// Make sure entire receiver passband is in the band
if(bp_low != NULL && bp_high != NULL){
struct bandplan r;
// If the passband straddles a mode or class boundary, form
// the intersection to give the more restrictive answers
r.classes = bp_low->classes & bp_high->classes;
r.modes = bp_low->modes & bp_high->modes;
mvwprintw(info,row++,1,"Band: %s",bp_low->name);
if(r.modes){
mvwaddstr(info,row++,1,"Emissions: ");
if(r.modes & VOICE)
waddstr(info,"Voice ");
if(r.modes & IMAGE)
waddstr(info,"Image ");
if(r.modes & DATA)
waddstr(info,"Data ");
if(r.modes & CW)
waddstr(info,"CW "); // Last since it's permitted almost everywhere
}
if(r.classes){
mvwaddstr(info,row++,1,"Privs: ");
if(r.classes & EXTRA_CLASS)
waddstr(info,"Extra ");
if(r.classes & ADVANCED_CLASS)
waddstr(info,"Adv ");
if(r.classes & GENERAL_CLASS)
waddstr(info,"Gen ");
if(r.classes & TECHNICIAN_CLASS)
waddstr(info,"Tech ");
if(r.classes & NOVICE_CLASS)
waddstr(info,"Nov ");
}
}
box(info,0,0);
mvwaddstr(info,0,17,"Info");
int const N = demod->filter.L + demod->filter.M - 1;
// Filter window values
row = 1;
col = 1;
mvwprintw(filtering,row,col,"%'+17.3f Hz",demod->filter.low);
mvwaddstr(filtering,row++,col,"Low");
mvwprintw(filtering,row,col,"%'+17.3f Hz",demod->filter.high);
mvwaddstr(filtering,row++,col,"High");
mvwprintw(filtering,row,col,"%'+17.3f Hz",demod->shift.freq);
mvwaddstr(filtering,row++,col,"Shift");
mvwprintw(filtering,row,col,"%'17.3f",demod->filter.kaiser_beta);
mvwaddstr(filtering,row++,col,"Beta");
mvwprintw(filtering,row,col,"%'17d",demod->filter.L);
mvwaddstr(filtering,row++,col,"Blocksize");
mvwprintw(filtering,row,col,"%'17d",demod->filter.M);
mvwaddstr(filtering,row++,col,"FIR");
mvwprintw(filtering,row,col,"%'17.3f Hz",(float)demod->input.samprate / N);
mvwaddstr(filtering,row++,col,"Freq bin");
mvwprintw(filtering,row,col,"%'17.3f ms",1000.0*(N - (demod->filter.M - 1)/2)/demod->input.samprate); // Is this correct?
mvwaddstr(filtering,row++,col,"Delay");
mvwprintw(filtering,row,col,"%17d",demod->filter.interpolate);
mvwaddstr(filtering,row++,col,"Interpolate");
mvwprintw(filtering,row,col,"%17d",demod->filter.decimate);
mvwaddstr(filtering,row++,col,"Decimate");
box(filtering,0,0);
mvwaddstr(filtering,0,6,"Filtering");
// Signal data window
float bw = Noise_bandwidth;
float sn0 = demod->sig.bb_power / demod->sig.n0 - bw;
sn0 = max(sn0,0.0f); // Can go negative due to inconsistent smoothed values; clip it at zero
row = 1;
col = 1;
mvwprintw(sig,row,col,"%15.1f dB",power2dB(demod->sig.if_power));
mvwaddstr(sig,row++,col,"IF");
mvwprintw(sig,row,col,"%15.1f dB",power2dB(demod->sig.bb_power));
mvwaddstr(sig,row++,col,"Baseband");
mvwprintw(sig,row,col,"%15.1f dB/Hz",power2dB(demod->sig.n0));
mvwaddstr(sig,row++,col,"N0");
mvwprintw(sig,row,col,"%15.1f dBHz",10*log10f(sn0));
mvwaddstr(sig,row++,col,"S/N0");
mvwprintw(sig,row,col,"%15.1f dBHz",10*log10f(bw));
mvwaddstr(sig,row++,col,"NBW");
mvwprintw(sig,row,col,"%15.1f dB",10*log10f(sn0/bw));
mvwaddstr(sig,row++,col,"SNR");
box(sig,0,0);
mvwaddstr(sig,0,9,"Signal");
// Demodulator info
wmove(demodulator,0,0);
wclrtobot(demodulator);
row = 1;
int rcol = 9;
int lcol = 1;
// Display only if used by current mode
if(demod->sig.snr >= 0){
mvwprintw(demodulator,row,rcol,"%11.1f dB",power2dB(demod->sig.snr));
mvwaddstr(demodulator,row++,lcol,"Loop SNR");
}
if(demod->demod_type == AM_DEMOD || demod->demod_type == LINEAR_DEMOD){
mvwprintw(demodulator,row,rcol,"%11.1f dB",voltage2dB(demod->agc.gain));
mvwaddstr(demodulator,row++,lcol,"AF Gain");
}
if(demod->demod_type == FM_DEMOD || (demod->demod_type == LINEAR_DEMOD && demod->opt.pll)){
mvwprintw(demodulator,row,rcol,"%'+11.3f Hz",demod->sig.foffset);
mvwaddstr(demodulator,row++,lcol,"Offset");
}
if(demod->demod_type == FM_DEMOD){
mvwprintw(demodulator,row,rcol,"%11.1f Hz",demod->sig.pdeviation);
mvwaddstr(demodulator,row++,lcol,"Deviation");
}
if(demod->demod_type == LINEAR_DEMOD && demod->opt.pll){
mvwprintw(demodulator,row,rcol,"%+11.1f deg",demod->sig.cphase*DEGPRA);
mvwaddstr(demodulator,row++,lcol,"Phase");
}
if(demod->demod_type == FM_DEMOD){
mvwprintw(demodulator,row,rcol,"%11.1f Hz",demod->sig.plfreq);
mvwaddstr(demodulator,row++,lcol,"Tone");
}
if(demod->demod_type == LINEAR_DEMOD && demod->opt.pll){
mvwprintw(demodulator,row,rcol,"%11s",demod->sig.pll_lock ? "Yes" : "No");
mvwaddstr(demodulator,row++,lcol,"PLL Lock");
}
box(demodulator,0,0);
mvwprintw(demodulator,0,5,"%s demodulator",Demodtab[demod->demod_type].name);
// SDR hardware status: sample rate, tcxo offset, I/Q offset and imbalance, gain settings
row = 1;
col = 1;
mvwprintw(sdr,row,col,"%'18d Hz",demod->sdr.status.samprate); // Nominal
mvwaddstr(sdr,row++,col,"Samprate");
mvwprintw(sdr,row,col,"%'18.1f dBFS",
power2dB(demod->sig.if_power) + demod->sdr.status.lna_gain + demod->sdr.status.mixer_gain + demod->sdr.status.if_gain);
mvwprintw(sdr,row++,col,"A/D Level");
mvwprintw(sdr,row,col,"%+18.6f",demod->sdr.DC_i); // Scaled to +/-1
mvwaddstr(sdr,row++,col,"I offset");
mvwprintw(sdr,row,col,"%+18.6f",demod->sdr.DC_q);
mvwaddstr(sdr,row++,col,"Q offset");
mvwprintw(sdr,row,col,"%+18.3f dB",power2dB(demod->sdr.imbalance));
mvwaddstr(sdr,row++,col,"I/Q imbal");
mvwprintw(sdr,row,col,"%+18.1f deg",demod->sdr.sinphi*DEGPRA);
mvwaddstr(sdr,row++,col,"I/Q phi");
mvwprintw(sdr,row,col,"%18u dB",demod->sdr.status.lna_gain); // SDR dependent
mvwaddstr(sdr,row++,col,"LNA gain");
mvwprintw(sdr,row,col,"%18u dB",demod->sdr.status.mixer_gain); // SDR dependent
mvwaddstr(sdr,row++,col,"Mix gain");
mvwprintw(sdr,row,col,"%18u dB",demod->sdr.status.if_gain); // SDR dependent
mvwaddstr(sdr,row++,col,"IF gain");
box(sdr,0,0);
mvwaddstr(sdr,0,6,"SDR Hardware");
// Demodulator options, can be set with mouse
row = 1;
col = 1;
if(demod->filter.isb)
wattron(options,A_UNDERLINE);
mvwprintw(options,row++,col,"ISB");
wattroff(options,A_UNDERLINE);
if(demod->opt.pll)
wattron(options,A_UNDERLINE);
mvwprintw(options,row++,col,"PLL");
wattroff(options,A_UNDERLINE);
if(demod->opt.square)
wattron(options,A_UNDERLINE);
mvwprintw(options,row++,col,"Square");
wattroff(options,A_UNDERLINE);
if(demod->output.channels == 1)
wattron(options,A_UNDERLINE);
mvwprintw(options,row++,col,"Mono");
wattroff(options,A_UNDERLINE);
if(demod->output.channels == 2)
wattron(options,A_UNDERLINE);
mvwprintw(options,row++,col,"Stereo");
wattroff(options,A_UNDERLINE);
box(options,0,0);
mvwaddstr(options,0,2,"Options");
// Display list of modes defined in /usr/local/share/ka9q-radio/modes.txt
// Underline the active one
// Can be selected with mouse
row = 1; col = 1;
for(int i=0;i<Nmodes;i++){
if(strcasecmp(demod->mode,Modes[i].name) == 0)
wattron(modes,A_UNDERLINE);
mvwaddstr(modes,row++,col,Modes[i].name);
wattroff(modes,A_UNDERLINE);
}
box(modes,0,0);
mvwaddstr(modes,0,1,"Modes");
// Network status window
if(memcmp(&old_input_source_address,&demod->input.source_address,sizeof(old_input_source_address)) != 0){
// First time, or source has changed
memcpy(&old_input_source_address,&demod->input.source_address,sizeof(old_input_source_address));
getnameinfo((struct sockaddr *)&demod->input.source_address,sizeof(demod->input.source_address),
source,sizeof(source),
sport,sizeof(sport),NI_NOFQDN|NI_DGRAM|NI_NUMERICHOST);
}
row = 1;
col = 1;
wmove(network,0,0);
wclrtobot(network);
mvwprintw(network,row++,col,"Source: %s:%s -> %s SSRC %0lx",source,sport,demod->input.dest_address_text,demod->input.rtp.ssrc);
mvwprintw(network,row++,col,"IQ pkts %'llu samples %'llu",
demod->input.rtp.packets,demod->input.samples);
if(demod->input.rtp.drops)
wprintw(network," drops %'llu",demod->input.rtp.drops);
if(demod->input.rtp.dupes)
wprintw(network," dupes %'llu",demod->input.rtp.dupes);
mvwprintw(network,row++,col,"Time: %s",lltime(demod->sdr.status.timestamp));
mvwprintw(network,row++,col,"Sink: %s; ssrc %8x; TTL %d%s",demod->output.dest_address_text,
demod->output.rtp.ssrc,Mcast_ttl,Mcast_ttl == 0 ? " (Local host only)":"");
mvwprintw(network,row++,col,"PCM %'d Hz; pkts %'llu",demod->output.samprate,demod->output.rtp.packets);
box(network,0,0);
mvwaddstr(network,0,35,"I/O");
touchwin(debug); // since we're not redrawing it every cycle
// Highlight cursor for tuning step
// A little messy because of the commas in the frequencies
// They come from the ' option in the printf formats
// tunestep is the log10 of the digit position (0 = units)
int hcol;
if(demod->tune.step >= 0){
hcol = demod->tune.step + demod->tune.step/3;
hcol = -hcol;
} else {
hcol = -demod->tune.step;
hcol = 1 + hcol + (hcol-1)/3; // 1 for the decimal point, and extras if there were commas in more than 3 places
}
switch(demod->tune.item){
case 0:
case 1:
case 2:
case 3:
mod_y = demod->tune.item + 1;
mod_x = 24 + hcol; // units in column 24
mvwchgat(tuning,mod_y,mod_x,1,A_STANDOUT,0,NULL);
break;
case 4:
case 5:
case 6:
case 7:
mod_y = demod->tune.item - 3;
mod_x = 13 + hcol; // units in column 13
mvwchgat(filtering,mod_y,mod_x,1,A_STANDOUT,0,NULL);
break;
default:
;
break;
}
wnoutrefresh(tuning);
wnoutrefresh(debug);
wnoutrefresh(info);
wnoutrefresh(filtering);
wnoutrefresh(sig);
wnoutrefresh(demodulator);
wnoutrefresh(sdr);
wnoutrefresh(options);
wnoutrefresh(modes);
wnoutrefresh(network);
doupdate(); // Update the screen right before we pause
// Scan and process keyboard commands
int c = getch(); // read keyboard with timeout; controls refresh rate
switch(c){
case KEY_MOUSE: // Mouse event
getmouse(&mouse_event);
break;
case ERR: // no key; timed out. Do nothing.
break;
case 'q': // Exit entire radio program. Should this be removed? ^C also works.
goto done;
case 'h':
case '?':
popup("help.txt");
break;
case 'I': // Change multicast address for input I/Q stream
{
char str[160];
getentry("IQ input IP dest address: ",str,sizeof(str));
if(strlen(str) <= 0)
break;
int const i = setup_mcast(str,NULL,0,0,0);
if(i == -1){
beep();
break;
}
// demod->input.fd is not protected by a mutex, so swap it carefully
// Mutex protection would be difficult because input thread is usually
// blocked on the socket, and if there's no I/Q input we'd hang
int const j = demod->input.fd;
demod->input.fd = i;
if(j != -1)
close(j); // This should cause the input thread to see an error
strlcpy(demod->input.dest_address_text,str,sizeof(demod->input.dest_address_text));
// Clear RTP receiver state
memset(&demod->input.rtp,0,sizeof(demod->input.rtp));
}
break;
case 'l': // Toggle RF or first LO lock; affects how adjustments to LO and IF behave
toggle_lock(demod);
break;
case KEY_NPAGE: // Page Down/tab key
case '\t': // go to next tuning item
demod->tune.item = (demod->tune.item + 1) % 8;
break;
case KEY_BTAB: // Page Up/Backtab, i.e., shifted tab:
case KEY_PPAGE: // go to previous tuning item
demod->tune.item = (8 + demod->tune.item - 1) % 8;
break;
case KEY_HOME: // Go back to item 0
demod->tune.item = 0;
demod->tune.step = 0;
break;
case KEY_BACKSPACE: // Cursor left: increase tuning step 10x
case KEY_LEFT:
if(demod->tune.step >= 9){
beep();
break;
}
demod->tune.step++;
break;
case KEY_RIGHT: // Cursor right: decrease tuning step /10
if(demod->tune.step <= -3){
beep();
break;
}
demod->tune.step--;
break;
case KEY_UP: // Increase whatever digit we're tuning
adjust_up(demod);
break;
case KEY_DOWN: // Decrease whatever we're tuning
adjust_down(demod);
break;
case '\f': // Screen repaint (formfeed, aka control-L)
clearok(curscr,TRUE);
break;
case 'b': // Blocksize - sets both data and impulse response-1
// They should be separably set. Do this in the state file for now
{
char str[160],*ptr;
getentry("Enter blocksize in samples: ",str,sizeof(str));
int const i = strtol(str,&ptr,0);
if(ptr == str)
break; // Nothing entered
demod->filter.L = i;
demod->filter.M = demod->filter.L + 1;
}
break;
case 'm': // Manually set modulation mode
{
char str[1024];
snprintf(str,sizeof(str),"Enter mode [ ");
for(int i=0;i < Nmodes;i++){
strlcat(str,Modes[i].name,sizeof(str) - strlen(str) - 1);
strlcat(str," ",sizeof(str) - strlen(str) - 1);
}
strlcat(str,"]: ",sizeof(str) - strlen(str) - 1);
getentry(str,str,sizeof(str));
if(strlen(str) <= 0)
break;
strncpy(demod->mode,str,sizeof(demod->mode));
}
break;
case 'f': // Tune to new radio frequency
{
char str[160];
getentry("Enter carrier frequency: ",str,sizeof(str));
double const f = parse_frequency(str); // Handles funky forms like 147m435
if(f <= 0)
break; // Invalid
// If frequency would be out of range, guess kHz or MHz
if(f >= 0.1 && f < 100)
demod->tune.freq = f*1e6; // 0.1 - 99.999 Only MHz can be valid
else if(f < 500) // 100-499.999 could be kHz or MHz, assume MHz
demod->tune.freq = f*1e6;
else if(f < 2000) // 500-1999.999 could be kHz or MHz, assume kHz
demod->tune.freq = f*1e3;
else if(f < 100000) // 2000-99999.999 can only be kHz
demod->tune.freq = f*1e3;
else // accept directly
demod->tune.freq = f;
}
break;
case 'i': // Recenter IF to +/- samprate/4
demod->tune.freq += demod->input.samprate/4.;
break;
case 'u': // Set display update rate in milliseconds (minimum 50, i.e, 20 Hz)
{
char str[160],*ptr;
getentry("Enter update interval, ms [<=0 means no auto update]: ",str,sizeof(str));
int const u = strtol(str,&ptr,0);
if(ptr == str)
break; // Nothing entered
if(u > 50){
Update_interval = u;