static void *dongle_f(void *arg) {
struct dongle_struct *ds = arg;
rtlsdr_dev_t *dev = NULL;
fprintf(stderr, "Initializing %d\n", ds->id);
#ifdef PURKKA1
CHECK1(rtlsdr_open(&dev, (ds->id + 1) % 3));
#define trigger_id 2
#else
CHECK1(rtlsdr_open(&dev, ds->id));
#define trigger_id 0
#endif
ds->dev = dev;
CHECK1(rtlsdr_set_sample_rate(dev, samprate));
CHECK1(rtlsdr_set_dithering(dev, 0));
CHECK1(rtlsdr_set_center_freq(dev, frequency));
CHECK1(rtlsdr_set_tuner_gain_mode(dev, 1));
CHECK1(rtlsdr_set_tuner_gain(dev, gain));
CHECK1(rtlsdr_reset_buffer(dev));
fprintf(stderr, "Initialized %d\n", ds->id);
donglesok++;
for(;;) {
int task;
pthread_mutex_lock(&dongle_m);
if(dongle_task == DONGLE_EXIT)
break;
sem_post(&dongle_sem);
pthread_cond_wait(&dongle_c, &dongle_m);
task = dongle_task;
pthread_mutex_unlock(&dongle_m);
if(task == DONGLE_READ) {
int ret;
int blocksize = ds->blocksize, n_read = 0;
n_read = 0;
errno = 0;
CHECK2(ret = rtlsdr_read_sync(dev, ds->buffer, blocksize, &n_read));
if(ret < 0) {
} else if(n_read < blocksize) {
fprintf(stderr, "Short read %d: %d/%d\n", ds->id, n_read, blocksize);
} else if(coherent_debug) {
fprintf(stderr, "Read %d\n", ds->id);
}
} else if(task == DONGLE_EXIT)
break;
}
donglesok--;
err:
fprintf(stderr, "Exiting %d\n", ds->id);
if(dev)
CHECK2(rtlsdr_close(dev));
sem_post(&dongle_sem);
return NULL;
}
rtl rtl_create(int device_index)
{
int status;
// create object
rtl r = (rtl) malloc(sizeof(struct rtl_s));
if (device_index < 0) {
device_index = _rtl_search_for_device("0");
if (device_index < 0) {
exit(1);
}
}
status = rtlsdr_open( & r->device, device_index);
if (status < 0) {
ERROR("Failed to open rtlsdr device %d.\n", device_index);
exit(1);
}
r->sample_rate = RTL_DEFAULT_SAMPLE_RATE;
r->state = RTL_HALTED;
pthread_mutex_init( & r->buffer_m, NULL);
pthread_mutex_init( & r->state_m, NULL);
return r;
}
bool opensdr(struct rtlsdrstruct* sdr, struct liquidobjects* dsp) {
sdr->device_index = 0;
int status;
status = rtlsdr_open(&sdr->device, sdr->device_index);
if (status < 0) {
printf("Failed to open rtlsdr device %d.\n", sdr->device_index);
exit(1);
}
// rtlsdr_set_center_freq(sdr->device, 97900000);
// rtlsdr_set_sample_rate(sdr->device, 2000000);
tune_sdr(sdr, 97900000, dsp);
setsamplingrate_sdr(sdr, 2000000, dsp);
rtlsdr_set_tuner_gain_mode(sdr->device, 0);
// printf("Gain mode set= %d\n",retval);
// rtlsdr_set_tuner_gain(sdr->device, 390);
// printf("Set gain= %d\n",retval);
rtlsdr_reset_buffer(sdr->device);
return true;
}
void modesInitRTLSDR(void) {
int j;
int device_count;
char vendor[256], product[256], serial[256];
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "[dvbt][e]No supported RTLSDR devices found.\n");
exit(1);
}
fprintf(stderr, "[dvbt][i]Found %d device(s):\n", device_count);
for (j = 0; j < device_count; j++) {
rtlsdr_get_device_usb_strings(j, vendor, product, serial);
fprintf(stderr, "[dvbt][i]%d: %s, %s, SN: %s %s\n", j, vendor, product, serial,
(j == Modes.dev_index) ? "(currently selected)" : "");
}
if (rtlsdr_open(&Modes.dev, Modes.dev_index) < 0) {
fprintf(stderr, "[dvbt][e]Error opening the RTLSDR device: %s\n",
strerror(errno));
exit(1);
}
/* Set gain, frequency, sample rate, and reset the device. */
rtlsdr_set_tuner_gain_mode(Modes.dev,
(Modes.gain == MODES_AUTO_GAIN) ? 0 : 1);
if (Modes.gain != MODES_AUTO_GAIN) {
if (Modes.gain == MODES_MAX_GAIN) {
/* Find the maximum gain available. */
int numgains;
int gains[100];
numgains = rtlsdr_get_tuner_gains(Modes.dev, gains);
Modes.gain = gains[numgains-1];
fprintf(stderr, "[dvbt][i]Max available gain is: %.2f\n", Modes.gain/10.0);
}
rtlsdr_set_tuner_gain(Modes.dev, Modes.gain);
fprintf(stderr, "[dvbt][i]Setting gain to: %.2f\n", Modes.gain/10.0);
} else {
fprintf(stderr, "[dvbt][i]Using automatic gain control.\n");
}
if( Modes.ppm_error != 0) {
fprintf(stderr, "[dvbt][i]Setting ppm error to: %d\n", Modes.ppm_error);
}
rtlsdr_set_freq_correction(Modes.dev, Modes.ppm_error);
if (Modes.enable_agc) rtlsdr_set_agc_mode(Modes.dev, 1);
rtlsdr_set_center_freq(Modes.dev, Modes.freq);
rtlsdr_set_sample_rate(Modes.dev, MODES_DEFAULT_RATE);
rtlsdr_reset_buffer(Modes.dev);
fprintf(stderr, "[dvbt][i]Gain reported by device: %.2f\n",
rtlsdr_get_tuner_gain(Modes.dev)/10.0);
}
/* rtlsdr initialization -------------------------------------------------------
* search front end and initialization
* args : none
* return : int status 0:okay -1:failure
*-----------------------------------------------------------------------------*/
extern int rtlsdr_init(void)
{
int ret,dev_index=0;;
/* open rtlsdr */
dev_index=verbose_device_search("0");
ret=rtlsdr_open(&dev, (uint32_t)dev_index);
if (ret<0) {
SDRPRINTF("error: failed to open rtlsdr device #%d.\n",dev_index);
return -1;
}
/* set configuration */
ret=rtlsdr_initconf();
if (ret<0) {
SDRPRINTF("error: failed to initialize rtlsdr\n");
return -1;
}
return 0;
}
int main(int argc, char** argv) {
uint32_t opt;
int32_t rtl_result;
int32_t rtl_count;
char rtl_vendor[256], rtl_product[256], rtl_serial[256];
initrx_options();
initDecoder_options();
/* RX buffer allocation */
rx_state.iSamples=malloc(sizeof(float)*SIGNAL_LENGHT*SIGNAL_SAMPLE_RATE);
rx_state.qSamples=malloc(sizeof(float)*SIGNAL_LENGHT*SIGNAL_SAMPLE_RATE);
/* Stop condition setup */
rx_state.exit_flag = false;
rx_state.decode_flag = false;
uint32_t nLoop = 0;
if (argc <= 1)
usage();
while ((opt = getopt(argc, argv, "f:c:l:g:a:o:p:u:d:n:i:H:Q:S")) != -1) {
switch (opt) {
case 'f': // Frequency
rx_options.dialfreq = (uint32_t)atofs(optarg);
break;
case 'c': // Callsign
sprintf(dec_options.rcall, "%.12s", optarg);
break;
case 'l': // Locator / Grid
sprintf(dec_options.rloc, "%.6s", optarg);
break;
case 'g': // Small signal amplifier gain
rx_options.gain = atoi(optarg);
if (rx_options.gain < 0) rx_options.gain = 0;
if (rx_options.gain > 49) rx_options.gain = 49;
rx_options.gain *= 10;
break;
case 'a': // Auto gain
rx_options.autogain = atoi(optarg);
if (rx_options.autogain < 0) rx_options.autogain = 0;
if (rx_options.autogain > 1) rx_options.autogain = 1;
break;
case 'o': // Fine frequency correction
rx_options.shift = atoi(optarg);
break;
case 'p':
rx_options.ppm = atoi(optarg);
break;
case 'u': // Upconverter frequency
rx_options.upconverter = (uint32_t)atofs(optarg);
break;
case 'd': // Direct Sampling
rx_options.directsampling = (uint32_t)atofs(optarg);
break;
case 'n': // Stop after n iterations
rx_options.maxloop = (uint32_t)atofs(optarg);
break;
case 'i': // Select the device to use
rx_options.device = (uint32_t)atofs(optarg);
break;
case 'H': // Decoder option, use a hastable
dec_options.usehashtable = 1;
break;
case 'Q': // Decoder option, faster
dec_options.quickmode = 1;
break;
case 'S': // Decoder option, single pass mode (same as original wsprd)
dec_options.subtraction = 0;
dec_options.npasses = 1;
break;
default:
usage();
break;
}
}
if (rx_options.dialfreq == 0) {
fprintf(stderr, "Please specify a dial frequency.\n");
fprintf(stderr, " --help for usage...\n");
exit(1);
}
if (dec_options.rcall[0] == 0) {
fprintf(stderr, "Please specify your callsign.\n");
fprintf(stderr, " --help for usage...\n");
exit(1);
}
if (dec_options.rloc[0] == 0) {
fprintf(stderr, "Please specify your locator.\n");
fprintf(stderr, " --help for usage...\n");
exit(1);
}
/* Calcule shift offset */
rx_options.realfreq = rx_options.dialfreq + rx_options.shift + rx_options.upconverter;
/* Store the frequency used for the decoder */
dec_options.freq = rx_options.dialfreq;
/* If something goes wrong... */
signal(SIGINT, &sigint_callback_handler);
signal(SIGTERM, &sigint_callback_handler);
signal(SIGILL, &sigint_callback_handler);
signal(SIGFPE, &sigint_callback_handler);
signal(SIGSEGV, &sigint_callback_handler);
signal(SIGABRT, &sigint_callback_handler);
/* Init & parameter the device */
rtl_count = rtlsdr_get_device_count();
if (!rtl_count) {
fprintf(stderr, "No supported devices found\n");
return EXIT_FAILURE;
}
fprintf(stderr, "Found %d device(s):\n", rtl_count);
for (uint32_t i=0; i<rtl_count; i++) {
rtlsdr_get_device_usb_strings(i, rtl_vendor, rtl_product, rtl_serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, rtl_vendor, rtl_product, rtl_serial);
}
fprintf(stderr, "\nUsing device %d: %s\n", rx_options.device, rtlsdr_get_device_name(rx_options.device));
rtl_result = rtlsdr_open(&rtl_device, rx_options.device);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to open rtlsdr device #%d.\n", rx_options.device);
return EXIT_FAILURE;
}
if (rx_options.directsampling) {
rtl_result = rtlsdr_set_direct_sampling(rtl_device, rx_options.directsampling);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to set direct sampling\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
}
rtl_result = rtlsdr_set_sample_rate(rtl_device, SAMPLING_RATE);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to set sample rate\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
rtl_result = rtlsdr_set_tuner_gain_mode(rtl_device, 1);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to enable manual gain\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
if (rx_options.autogain) {
rtl_result = rtlsdr_set_tuner_gain_mode(rtl_device, 0);
if (rtl_result != 0) {
fprintf(stderr, "ERROR: Failed to set tuner gain\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
} else {
rtl_result = rtlsdr_set_tuner_gain(rtl_device, rx_options.gain);
if (rtl_result != 0) {
fprintf(stderr, "ERROR: Failed to set tuner gain\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
}
if (rx_options.ppm != 0) {
rtl_result = rtlsdr_set_freq_correction(rtl_device, rx_options.ppm);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to set ppm error\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
}
rtl_result = rtlsdr_set_center_freq(rtl_device, rx_options.realfreq + FS4_RATE + 1500);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to set frequency\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
rtl_result = rtlsdr_reset_buffer(rtl_device);
if (rtl_result < 0) {
fprintf(stderr, "ERROR: Failed to reset buffers.\n");
rtlsdr_close(rtl_device);
return EXIT_FAILURE;
}
/* Print used parameter */
time_t rawtime;
time ( &rawtime );
struct tm *gtm = gmtime(&rawtime);
printf("\nStarting rtlsdr-wsprd (%04d-%02d-%02d, %02d:%02dz) -- Version 0.2\n",
gtm->tm_year + 1900, gtm->tm_mon + 1, gtm->tm_mday, gtm->tm_hour, gtm->tm_min);
printf(" Callsign : %s\n", dec_options.rcall);
printf(" Locator : %s\n", dec_options.rloc);
printf(" Dial freq. : %d Hz\n", rx_options.dialfreq);
printf(" Real freq. : %d Hz\n", rx_options.realfreq);
printf(" PPM factor : %d\n", rx_options.ppm);
if(rx_options.autogain)
printf(" Auto gain : enable\n");
else
printf(" Gain : %d dB\n", rx_options.gain/10);
/* Time alignment stuff */
struct timeval lTime;
gettimeofday(&lTime, NULL);
uint32_t sec = lTime.tv_sec % 120;
uint32_t usec = sec * 1000000 + lTime.tv_usec;
uint32_t uwait = 120000000 - usec;
printf("Wait for time sync (start in %d sec)\n\n", uwait/1000000);
/* Prepare a low priority param for the decoder thread */
struct sched_param param;
pthread_attr_init(&dec.tattr);
pthread_attr_setschedpolicy(&dec.tattr, SCHED_RR);
pthread_attr_getschedparam(&dec.tattr, ¶m);
param.sched_priority = 90; // = sched_get_priority_min();
pthread_attr_setschedparam(&dec.tattr, ¶m);
/* Create a thread and stuff for separate decoding
Info : https://computing.llnl.gov/tutorials/pthreads/
*/
pthread_rwlock_init(&dec.rw, NULL);
pthread_cond_init(&dec.ready_cond, NULL);
pthread_mutex_init(&dec.ready_mutex, NULL);
pthread_create(&dongle.thread, NULL, rtlsdr_rx, NULL);
pthread_create(&dec.thread, &dec.tattr, wsprDecoder, NULL);
/* Main loop : Wait, read, decode */
while (!rx_state.exit_flag && !(rx_options.maxloop && (nLoop >= rx_options.maxloop))) {
/* Wait for time Sync on 2 mins */
gettimeofday(&lTime, NULL);
sec = lTime.tv_sec % 120;
usec = sec * 1000000 + lTime.tv_usec;
uwait = 120000000 - usec + 10000; // Adding 10ms, to be sure to reach this next minute
usleep(uwait);
//printf("SYNC! RX started\n");
/* Use the Store the date at the begin of the frame */
time ( &rawtime );
gtm = gmtime(&rawtime);
sprintf(rx_options.date,"%02d%02d%02d", gtm->tm_year - 100, gtm->tm_mon + 1, gtm->tm_mday);
sprintf(rx_options.uttime,"%02d%02d", gtm->tm_hour, gtm->tm_min);
/* Start to store the samples */
initSampleStorage();
while( (rx_state.exit_flag == false) &&
(rx_state.iqIndex < (SIGNAL_LENGHT * SIGNAL_SAMPLE_RATE) ) ) {
usleep(250000);
}
nLoop++;
}
/* Stop the RX and free the blocking function */
rtlsdr_cancel_async(rtl_device);
/* Close the RTL device */
rtlsdr_close(rtl_device);
printf("Bye!\n");
/* Wait the thread join (send a signal before to terminate the job) */
pthread_mutex_lock(&dec.ready_mutex);
pthread_cond_signal(&dec.ready_cond);
pthread_mutex_unlock(&dec.ready_mutex);
pthread_join(dec.thread, NULL);
pthread_join(dongle.thread, NULL);
/* Destroy the lock/cond/thread */
pthread_rwlock_destroy(&dec.rw);
pthread_cond_destroy(&dec.ready_cond);
pthread_mutex_destroy(&dec.ready_mutex);
pthread_exit(NULL);
return EXIT_SUCCESS;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
int n_read, r, opt, i;
int sync_mode = 0;
uint8_t *buffer;
int dev_index = 0;
int dev_given = 0;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int count;
int gains[100];
while ((opt = getopt(argc, argv, "d:s:b:tp::Sh")) != -1) {
switch (opt) {
case 'd':
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
case 's':
samp_rate = (uint32_t)atof(optarg);
break;
case 'b':
out_block_size = (uint32_t)atof(optarg);
break;
case 't':
test_mode = TUNER_BENCHMARK;
break;
case 'p':
test_mode = PPM_BENCHMARK;
if (optarg)
ppm_duration = atoi(optarg);
break;
case 'S':
sync_mode = 1;
break;
case 'h':
default:
usage();
break;
}
}
if(out_block_size < MINIMAL_BUF_LENGTH ||
out_block_size > MAXIMAL_BUF_LENGTH ){
fprintf(stderr,
"Output block size wrong value, falling back to default\n");
fprintf(stderr,
"Minimal length: %u\n", MINIMAL_BUF_LENGTH);
fprintf(stderr,
"Maximal length: %u\n", MAXIMAL_BUF_LENGTH);
out_block_size = DEFAULT_BUF_LENGTH;
}
buffer = malloc(out_block_size * sizeof(uint8_t));
if (!dev_given) {
dev_index = verbose_device_search("0");
}
if (dev_index < 0) {
exit(1);
}
r = rtlsdr_open(&dev, (uint32_t)dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
count = rtlsdr_get_tuner_gains(dev, NULL);
fprintf(stderr, "Supported gain values (%d): ", count);
count = rtlsdr_get_tuner_gains(dev, gains);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
/* Set the sample rate */
verbose_set_sample_rate(dev, samp_rate);
if (test_mode == TUNER_BENCHMARK) {
tuner_benchmark();
goto exit;
}
/* Enable test mode */
r = rtlsdr_set_testmode(dev, 1);
/* Reset endpoint before we start reading from it (mandatory) */
verbose_reset_buffer(dev);
if ((test_mode == PPM_BENCHMARK) && !sync_mode) {
fprintf(stderr, "Reporting PPM error measurement every %i seconds...\n", ppm_duration);
fprintf(stderr, "Press ^C after a few minutes.\n");
}
if (test_mode == NO_BENCHMARK) {
fprintf(stderr, "\nInfo: This tool will continuously"
" read from the device, and report if\n"
"samples get lost. If you observe no "
"further output, everything is fine.\n\n");
}
if (sync_mode) {
fprintf(stderr, "Reading samples in sync mode...\n");
fprintf(stderr, "(Samples are being lost but not reported.)\n");
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
underrun_test(buffer, n_read, 1);
}
} else {
fprintf(stderr, "Reading samples in async mode...\n");
r = rtlsdr_read_async(dev, rtlsdr_callback, NULL,
0, out_block_size);
}
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");
fprintf(stderr, "Samples per million lost (minimum): %i\n", (int)(1000000L * dropped_samples / total_samples));
}
else
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);
exit:
rtlsdr_close(dev);
free (buffer);
return r >= 0 ? r : -r;
}
int main(int argc, char **argv) {
#ifndef _WIN32
struct sigaction sigact;
#endif
char *out_filename = NULL;
char *in_filename = NULL;
FILE *in_file;
int n_read;
int r = 0, opt;
int i, gain = 0;
int sync_mode = 0;
int ppm_error = 0;
struct dm_state* demod;
uint32_t dev_index = 0;
int frequency_current = 0;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int device_count;
char vendor[256], product[256], serial[256];
int have_opt_R = 0;
setbuf(stdout, NULL);
setbuf(stderr, NULL);
demod = malloc(sizeof (struct dm_state));
memset(demod, 0, sizeof (struct dm_state));
/* initialize tables */
baseband_init();
r_device devices[] = {
#define DECL(name) name,
DEVICES
#undef DECL
};
num_r_devices = sizeof(devices)/sizeof(*devices);
demod->level_limit = DEFAULT_LEVEL_LIMIT;
while ((opt = getopt(argc, argv, "x:z:p:DtaAqm:r:l:d:f:g:s:b:n:SR:F:C:T:UW")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 'f':
if (frequencies < MAX_PROTOCOLS) frequency[frequencies++] = (uint32_t) atof(optarg);
else fprintf(stderr, "Max number of frequencies reached %d\n", MAX_PROTOCOLS);
break;
case 'g':
gain = (int) (atof(optarg) * 10); /* tenths of a dB */
break;
case 'p':
ppm_error = atoi(optarg);
break;
case 's':
samp_rate = (uint32_t) atof(optarg);
break;
case 'b':
out_block_size = (uint32_t) atof(optarg);
break;
case 'l':
demod->level_limit = (uint32_t) atof(optarg);
break;
case 'n':
bytes_to_read = (uint32_t) atof(optarg) * 2;
break;
case 'a':
demod->analyze = 1;
break;
case 'A':
demod->analyze_pulses = 1;
break;
case 'r':
in_filename = optarg;
break;
case 't':
demod->signal_grabber = 1;
break;
case 'm':
demod->debug_mode = atoi(optarg);
break;
case 'S':
sync_mode = 1;
break;
case 'D':
debug_output++;
break;
case 'z':
override_short = atoi(optarg);
break;
case 'x':
override_long = atoi(optarg);
break;
case 'R':
if (!have_opt_R) {
for (i = 0; i < num_r_devices; i++) {
devices[i].disabled = 1;
}
have_opt_R = 1;
}
i = atoi(optarg);
if (i > num_r_devices) {
fprintf(stderr, "Remote device number specified larger than number of devices\n\n");
usage(devices);
}
devices[i - 1].disabled = 0;
break;
case 'q':
quiet_mode = 1;
break;
case 'F':
if (strcmp(optarg, "json") == 0) {
add_json_output();
} else if (strcmp(optarg, "csv") == 0) {
add_csv_output(determine_csv_fields(devices, num_r_devices));
} else if (strcmp(optarg, "kv") == 0) {
add_kv_output();
} else {
fprintf(stderr, "Invalid output format %s\n", optarg);
usage(devices);
}
break;
case 'C':
if (strcmp(optarg, "native") == 0) {
conversion_mode = CONVERT_NATIVE;
} else if (strcmp(optarg, "si") == 0) {
conversion_mode = CONVERT_SI;
} else if (strcmp(optarg, "customary") == 0) {
conversion_mode = CONVERT_CUSTOMARY;
} else {
fprintf(stderr, "Invalid conversion mode %s\n", optarg);
usage(devices);
}
break;
case 'U':
#if !defined(__MINGW32__)
utc_mode = setenv("TZ", "UTC", 1);
if(utc_mode != 0) fprintf(stderr, "Unable to set TZ to UTC; error code: %d\n", utc_mode);
#endif
break;
case 'W':
overwrite_mode = 1;
break;
case 'T':
time(&stop_time);
duration = atoi(optarg);
if (duration < 1) {
fprintf(stderr, "Duration '%s' was not positive integer; will continue indefinitely\n", optarg);
} else {
stop_time += duration;
}
break;
default:
usage(devices);
break;
}
}
if (argc <= optind - 1) {
usage(devices);
} else {
out_filename = argv[optind];
}
if (!output_handler) {
add_kv_output();
}
for (i = 0; i < num_r_devices; i++) {
if (!devices[i].disabled) {
register_protocol(demod, &devices[i]);
if(devices[i].modulation >= FSK_DEMOD_MIN_VAL) {
demod->enable_FM_demod = 1;
}
}
}
if (out_block_size < MINIMAL_BUF_LENGTH ||
out_block_size > MAXIMAL_BUF_LENGTH) {
fprintf(stderr,
"Output block size wrong value, falling back to default\n");
fprintf(stderr,
"Minimal length: %u\n", MINIMAL_BUF_LENGTH);
fprintf(stderr,
"Maximal length: %u\n", MAXIMAL_BUF_LENGTH);
out_block_size = DEFAULT_BUF_LENGTH;
}
if (!in_filename) {
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
if (!in_filename)
exit(1);
}
if (!quiet_mode) {
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index, rtlsdr_get_device_name(dev_index));
}
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler((PHANDLER_ROUTINE) sighandler, TRUE);
#endif
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
else
fprintf(stderr, "Sample rate set to %d.\n", rtlsdr_get_sample_rate(dev)); // Unfortunately, doesn't return real rate
fprintf(stderr, "Bit detection level set to %d.\n", demod->level_limit);
if (0 == gain) {
/* Enable automatic gain */
r = rtlsdr_set_tuner_gain_mode(dev, 0);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable automatic gain.\n");
else
fprintf(stderr, "Tuner gain set to Auto.\n");
} else {
/* Enable manual gain */
r = rtlsdr_set_tuner_gain_mode(dev, 1);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
/* Set the tuner gain */
r = rtlsdr_set_tuner_gain(dev, gain);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
else
fprintf(stderr, "Tuner gain set to %f dB.\n", gain / 10.0);
}
r = rtlsdr_set_freq_correction(dev, ppm_error);
}
if (out_filename) {
if (strcmp(out_filename, "-") == 0) { /* Write samples to stdout */
demod->out_file = stdout;
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
#endif
} else {
if (access(out_filename, F_OK) == 0 && !overwrite_mode) {
fprintf(stderr, "Output file %s already exists, exiting\n", out_filename);
goto out;
}
demod->out_file = fopen(out_filename, "wb");
if (!demod->out_file) {
fprintf(stderr, "Failed to open %s\n", out_filename);
goto out;
}
}
}
if (demod->signal_grabber)
demod->sg_buf = malloc(SIGNAL_GRABBER_BUFFER);
if (in_filename) {
int i = 0;
unsigned char test_mode_buf[DEFAULT_BUF_LENGTH];
float test_mode_float_buf[DEFAULT_BUF_LENGTH];
if (strcmp(in_filename, "-") == 0) { /* read samples from stdin */
in_file = stdin;
in_filename = "<stdin>";
} else {
in_file = fopen(in_filename, "rb");
if (!in_file) {
fprintf(stderr, "Opening file: %s failed!\n", in_filename);
goto out;
}
}
fprintf(stderr, "Test mode active. Reading samples from file: %s\n", in_filename); // Essential information (not quiet)
if (!quiet_mode) {
fprintf(stderr, "Input format: %s\n", (demod->debug_mode == 3) ? "cf32" : "uint8");
}
sample_file_pos = 0.0;
int n_read, cf32_tmp;
do {
if (demod->debug_mode == 3) {
n_read = fread(test_mode_float_buf, sizeof(float), 131072, in_file);
for(int n = 0; n < n_read; n++) {
cf32_tmp = test_mode_float_buf[n]*127 + 127;
if (cf32_tmp < 0)
cf32_tmp = 0;
else if (cf32_tmp > 255)
cf32_tmp = 255;
test_mode_buf[n] = (uint8_t)cf32_tmp;
}
} else {
n_read = fread(test_mode_buf, 1, 131072, in_file);
}
if (n_read == 0) break; // rtlsdr_callback() will Segmentation Fault with len=0
rtlsdr_callback(test_mode_buf, n_read, demod);
i++;
sample_file_pos = (float)i * n_read / samp_rate;
} while (n_read != 0);
// Call a last time with cleared samples to ensure EOP detection
memset(test_mode_buf, 128, DEFAULT_BUF_LENGTH); // 128 is 0 in unsigned data
rtlsdr_callback(test_mode_buf, 131072, demod); // Why the magic value 131072?
//Always classify a signal at the end of the file
classify_signal();
if (!quiet_mode) {
fprintf(stderr, "Test mode file issued %d packets\n", i);
}
exit(0);
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0)
fprintf(stderr, "WARNING: Failed to reset buffers.\n");
if (sync_mode) {
if (!demod->out_file) {
fprintf(stderr, "Specify an output file for sync mode.\n");
exit(0);
}
fprintf(stderr, "Reading samples in sync mode...\n");
uint8_t *buffer = malloc(out_block_size * sizeof (uint8_t));
time_t timestamp;
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t) n_read)) {
n_read = bytes_to_read;
do_exit = 1;
}
if (fwrite(buffer, 1, n_read, demod->out_file) != (size_t) n_read) {
fprintf(stderr, "Short write, samples lost, exiting!\n");
break;
}
if ((uint32_t) n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
if (duration > 0) {
time(×tamp);
if (timestamp >= stop_time) {
do_exit = 1;
fprintf(stderr, "Time expired, exiting!\n");
}
}
if (bytes_to_read > 0)
bytes_to_read -= n_read;
}
free(buffer);
} else {
if (frequencies == 0) {
frequency[0] = DEFAULT_FREQUENCY;
frequencies = 1;
} else {
time(&rawtime_old);
}
if (!quiet_mode) {
fprintf(stderr, "Reading samples in async mode...\n");
}
while (!do_exit) {
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, frequency[frequency_current]);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else
fprintf(stderr, "Tuned to %u Hz.\n", rtlsdr_get_center_freq(dev));
r = rtlsdr_read_async(dev, rtlsdr_callback, (void *) demod,
DEFAULT_ASYNC_BUF_NUMBER, out_block_size);
do_exit_async = 0;
frequency_current++;
if (frequency_current > frequencies - 1) frequency_current = 0;
}
}
if (do_exit)
fprintf(stderr, "\nUser cancel, exiting...\n");
else
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);
if (demod->out_file && (demod->out_file != stdout))
fclose(demod->out_file);
for (i = 0; i < demod->r_dev_num; i++)
free(demod->r_devs[i]);
if (demod->signal_grabber)
free(demod->sg_buf);
free(demod);
rtlsdr_close(dev);
out:
for (output_handler_t *output = output_handler; output; output = output->next) {
if (output->aux_free) {
output->aux_free(output->aux);
}
}
return r >= 0 ? r : -r;
}
int main(){
printf("samplerate: %d\nbuflen:%d\n", SAMPLERATE, BUFLEN);
rtlsdr_dev_t *dev = NULL;
int devindex = verbose_device_search("0");
int r = rtlsdr_open(&dev, devindex);
if(r){printf("err %d opening device\n", r);}
verbose_set_sample_rate(dev, SAMPLERATE);
verbose_set_frequency(dev, 90000000);//357000);
//verbose_gain_set(dev, 496);
verbose_gain_set(dev, 200);
//verbose_auto_gain(dev);
verbose_reset_buffer(dev);
char *buf = calloc(BUFLEN,1);
//char *buf = malloc((1<<16)*8);//[(1<<16)*8] = {0};
int howmany = 0;
rtlsdr_read_sync(dev, buf, BUFLEN, &howmany);
printf("read %d of %d\n", howmany, BUFLEN);
FILE *testfile = fopen("test.dat", "w");
//fprintf(testfile, "[\n");
int i;
for(i=0;i<howmany/2;i++){
fprintf(testfile, "%d %d\n", i, (int)((unsigned short*)buf)[i] - 0xffff/2);
}
fwrite(buf, 1, howmany,testfile);
fclose(testfile);
double *inbuf = calloc(BUFLEN/2, sizeof(double));
fftw_complex *outbuf = calloc(BUFLEN/2, sizeof(fftw_complex));
fftw_plan plan = fftw_plan_dft_r2c_1d(BUFLEN/2, inbuf, outbuf, FFTW_ESTIMATE);
for(i=0;i<howmany/2;i++){
inbuf[i] = (double)((int)((unsigned short*)buf)[i] - 0xffff/2);
}
fftw_execute(plan);
testfile = fopen("testdft.dat", "w");
for(i=1/*ignore first component (dc?)*/;i<howmany/2/2;i++){
fprintf(testfile, "%d %f\n", i, log10(abs(outbuf[i][0]))-log10(DBL_MAX));//this math is probably/definitely all wrong
}
fclose(testfile);
//free(buf);
#ifdef BIGDFT
testfile = fopen("bigdft.dat", "w");
int freq;
//for(freq=2000000;freq<1000000000;freq += 2048000){
//for(freq=80000000;freq<100000000;freq += SAMPLERATE/*BUFLEN/2*/){
for(freq=40000000;freq<1000000000;freq += SAMPLERATE/*BUFLEN/2*/){
verbose_set_frequency(dev, freq);//357000);
verbose_reset_buffer(dev);
rtlsdr_read_sync(dev, buf, BUFLEN, &howmany);
for(i=0;i<howmany/2;i++){
inbuf[i] = (double)((int)((unsigned short*)buf)[i] - 0xffff/2);
}
fftw_execute(plan);
for(i=1;i<howmany/2/2;i+= 1){//50){
//fprintf(testfile, "%d %f\n", i*(SAMPLERATE/(howmany/2/2))+freq, (outbuf[i][0]));//this math is probably/definitely all wrong
fprintf(testfile, "%d %f\n", i*(SAMPLERATE/(howmany/2/2))+freq, log10(abs(outbuf[i][0]))-log10(DBL_MAX));//this math is probably/definitely all wrong
}
printf("%d\n", freq);
}
fclose(testfile);
#endif
rtlsdr_close(dev);
return 0;
}
bool CRtlSdr::open() {
if (device_count == 0) {
qDebug() << "No supported device found to open rtlsdr device " << dongle.dev_index << "\n";
power = false;
return false;
}
Initialize(&dongle,&demod);
dongle.dev_index = 0;
if (dongle.dev_index < 0) {
power = false;
return false;
}
int r = rtlsdr_open(&dongle.dev, (uint32_t)dongle.dev_index);
if (r < 0) {
qDebug() << "Failed to open rtlsdr device " << dongle.dev_index << "\n";
power = false;
return false;
}
r = rtlsdr_set_tuner_gain_mode(dongle.dev,dongle.gain);
if (r < 0) {
qDebug() << "Failed to set gain to " << dongle.gain << "\n";
power = false;
return false;
}
r = rtlsdr_set_tuner_gain(dongle.dev,20);
if (r < 0) {
qDebug() << "Failed to set gain to " << dongle.gain << "\n";
power = false;
return false;
}
r = rtlsdr_reset_buffer(dongle.dev);
if (r < 0) {
qDebug() << "WARNING: Failed to reset buffers.\n";
}
r = rtlsdr_set_sample_rate(dongle.dev,dongle.rate);
if (r < 0) {
qDebug() << "Failed to set sample rate to " << dongle.rate << "\n";
power = false;
return false;
}
r = rtlsdr_set_freq_correction(dongle.dev,43);
if (r < 0) {
qDebug() << "Failed to set ppm rate to " << 43 << "\n";
power = false;
return false;
}
qDebug() << "Dongle sample rate " << rtlsdr_get_sample_rate(dongle.dev);
// Build a data reader thead
pthread_create(&dongle.thread, NULL, dongle_thread_fn, (void *)(this));
power = true;
log_t.isConnected = true;
return true;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
int n_read;
int r, opt;
int i, tuner_benchmark = 0;
int sync_mode = 0;
uint8_t *buffer;
uint32_t dev_index = 0;
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int device_count;
int count;
int gains[100];
int real_rate;
int64_t ns;
while ((opt = getopt(argc, argv, "d:s:b:tpS::")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 's':
samp_rate = (uint32_t)atof(optarg);
break;
case 'b':
out_block_size = (uint32_t)atof(optarg);
break;
case 't':
tuner_benchmark = 1;
break;
case 'p':
ppm_benchmark = PPM_DURATION;
break;
case 'S':
sync_mode = 1;
break;
default:
usage();
break;
}
}
if(out_block_size < MINIMAL_BUF_LENGTH ||
out_block_size > MAXIMAL_BUF_LENGTH ){
fprintf(stderr,
"Output block size wrong value, falling back to default\n");
fprintf(stderr,
"Minimal length: %u\n", MINIMAL_BUF_LENGTH);
fprintf(stderr,
"Maximal length: %u\n", MAXIMAL_BUF_LENGTH);
out_block_size = DEFAULT_BUF_LENGTH;
}
buffer = malloc(out_block_size * sizeof(uint8_t));
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++)
fprintf(stderr, " %d: %s\n", i, rtlsdr_get_device_name(i));
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index,
rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
count = rtlsdr_get_tuner_gains(dev, NULL);
fprintf(stderr, "Supported gain values (%d): ", count);
count = rtlsdr_get_tuner_gains(dev, gains);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
if (tuner_benchmark) {
if (rtlsdr_get_tuner_type(dev) == RTLSDR_TUNER_E4000)
e4k_benchmark();
else
fprintf(stderr, "No E4000 tuner found, aborting.\n");
goto exit;
}
/* Enable test mode */
r = rtlsdr_set_testmode(dev, 1);
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0)
fprintf(stderr, "WARNING: Failed to reset buffers.\n");
if (ppm_benchmark && !sync_mode) {
fprintf(stderr, "Reporting PPM error measurement every %i seconds...\n", ppm_benchmark);
fprintf(stderr, "Press ^C after a few minutes.\n");
#ifdef __APPLE__
gettimeofday(&tv, NULL);
ppm_recent.tv_sec = tv.tv_sec;
ppm_recent.tv_nsec = tv.tv_usec*1000;
ppm_start.tv_sec = tv.tv_sec;
ppm_start.tv_nsec = tv.tv_usec*1000;
#elif __unix__
clock_gettime(CLOCK_REALTIME, &ppm_recent);
clock_gettime(CLOCK_REALTIME, &ppm_start);
#endif
}
if (!ppm_benchmark) {
fprintf(stderr, "\nInfo: This tool will continuously"
" read from the device, and report if\n"
"samples get lost. If you observe no "
"further output, everything is fine.\n\n");
}
if (sync_mode) {
fprintf(stderr, "Reading samples in sync mode...\n");
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
}
} else {
fprintf(stderr, "Reading samples in async mode...\n");
r = rtlsdr_read_async(dev, rtlsdr_callback, NULL,
DEFAULT_ASYNC_BUF_NUMBER, out_block_size);
}
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");
if (ppm_benchmark) {
#ifndef _WIN32
ns = 1000000000L * (int64_t)(ppm_recent.tv_sec - ppm_start.tv_sec);
ns += (int64_t)(ppm_recent.tv_nsec - ppm_start.tv_nsec);
real_rate = (int)(ppm_total * 1000000000L / ns);
printf("Cumulative PPM error: %i\n",
(int)round((double)(1000000 * (real_rate - (int)samp_rate)) / (double)samp_rate));
#endif
}
}
else
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);
exit:
rtlsdr_close(dev);
free (buffer);
return r >= 0 ? r : -r;
}
static int do_sdr_decode(struct dab_state_t* dab, int frequency, int gain)
{
struct sigaction sigact;
uint32_t dev_index = 0;
int32_t device_count;
int i,r;
char vendor[256], product[256], serial[256];
uint32_t samp_rate = 2048000;
memset(&sdr,0,sizeof(struct sdr_state_t));
sdr.frequency = frequency;
//fprintf(stderr,"%i\n",sdr.frequency);
/*---------------------------------------------------
Looking for device and open connection
----------------------------------------------------*/
if (dab->device_type == DAB_DEVICE_RTLSDR) {
sdr.convert_unsigned = 1;
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
int gains[100];
int count = rtlsdr_get_tuner_gains(dev, gains);
fprintf(stderr, "Supported gain values (%d): ", count);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
}
else if (dab->device_type == DAB_DEVICE_HACKRF) {
sdr.convert_unsigned = 0;
r = hackrf_init();
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_init() failed", r);
return EXIT_FAILURE;
}
const char* serial_number = nullptr;
r = hackrf_open_by_serial(serial_number, &hackrf);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_open() failed", r);
return EXIT_FAILURE;
}
}
else
{
r = -1;
return EXIT_FAILURE;
}
/*-------------------------------------------------
Set Frequency & Sample Rate
--------------------------------------------------*/
if (dab->device_type == DAB_DEVICE_RTLSDR) {
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, sdr.frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else
fprintf(stderr, "Tuned to %u Hz.\n", sdr.frequency);
/*------------------------------------------------
Setting gain
-------------------------------------------------*/
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
/*-----------------------------------------------
/ Reset endpoint (mandatory)
------------------------------------------------*/
r = rtlsdr_reset_buffer(dev);
}
else if (dab->device_type == DAB_DEVICE_HACKRF) {
int sample_rate_hz = samp_rate;
fprintf(stderr, "call hackrf_sample_rate_set(%u Hz/%.03f MHz)\n", sample_rate_hz, (sample_rate_hz/1e6));
int r = hackrf_set_sample_rate_manual(hackrf, sample_rate_hz, 1);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_sample_rate_set() failed", r);
return EXIT_FAILURE;
}
/* possible settings 1.75/2.5/3.5/5/5.5/6/7/8/9/10/12/14/15/20/24/28 */
int baseband_filter_bw_hz = 2500000;
fprintf(stderr, "call hackrf_baseband_filter_bandwidth_set(%d Hz/%.03f MHz)\n",
baseband_filter_bw_hz, ((float)baseband_filter_bw_hz/1e6));
r = hackrf_set_baseband_filter_bandwidth(hackrf, baseband_filter_bw_hz);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_baseband_filter_bandwidth_set()", r);
return EXIT_FAILURE;
}
r = hackrf_set_vga_gain(hackrf, hackrf_vga_gain);
r |= hackrf_set_lna_gain(hackrf, hackrf_lna_gain);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_vga gain/lna gain", r);
return EXIT_FAILURE;
}
r = hackrf_set_freq(hackrf, sdr.frequency);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_set_freq()", r);
return EXIT_FAILURE;
}
}
/*-----------------------------------------------
/ Signal handler
------------------------------------------------*/
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
/*-----------------------------------------------
/ start demod thread & rtl read
-----------------------------------------------*/
fprintf(stderr,"Waiting for sync...\n");
sdr_init(&sdr);
//dab_fic_parser_init(&sinfo);
//dab_analyzer_init(&ana);
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(dab));
if (dab->device_type == DAB_DEVICE_RTLSDR) {
rtlsdr_read_async(dev, rtlsdr_callback, (void *)(&sdr),
DEFAULT_ASYNC_BUF_NUMBER, DEFAULT_BUF_LENGTH);
}
else if (dab->device_type == DAB_DEVICE_HACKRF) {
r = hackrf_start_rx(hackrf, hackrf_callback, (void *)(&sdr));
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_start_x()", r);
return EXIT_FAILURE;
}
while( ((r=hackrf_is_streaming(hackrf)) == HACKRF_TRUE) &&
(do_exit == false) ) {
sleep(1);
fprintf(stderr, "samples: low: %02.2f%%, saturating: %02.2f%%\n",
num_low_power * 100.0 / DEFAULT_BUF_LENGTH,
num_saturated * 100.0 / DEFAULT_BUF_LENGTH);
}
hackrf_err("hackrf_is_streaming", r);
}
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
if (dab->device_type == DAB_DEVICE_RTLSDR) {
rtlsdr_cancel_async(dev);
//dab_demod_close(&dab);
rtlsdr_close(dev);
}
else if (dab->device_type == DAB_DEVICE_HACKRF) {
if (hackrf != NULL)
{
r = hackrf_stop_rx(hackrf);
if( r != HACKRF_SUCCESS ) {
hackrf_err("hackrf_stop_rx() failed", r);
}
else {
fprintf(stderr, "hackrf_stop_rx() done\n");
}
r = hackrf_close(hackrf);
if( r != HACKRF_SUCCESS )
{
hackrf_err("hackrf_close() failed", r);
}
else {
fprintf(stderr, "hackrf_close() done\n");
}
}
hackrf_exit();
}
return 1;
}
int main(int argc, char **argv)
{
// setup window
glut_init(argc,argv);
///
// init radio
///
int device_count = rtlsdr_get_device_count();
if (!device_count)
{
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
uint32_t dev_index = 0;
fprintf(stderr, "Using device %d: %s\n", dev_index, rtlsdr_get_device_name(dev_index));
int r = rtlsdr_open(&dev, dev_index);
if (r < 0)
{
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
/* Set the sample rate */
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0) fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
frequency = 100000000;
if(argv[1]) frequency = (uint32_t)atof(argv[1]) * (uint32_t)1e6;
if(frequency < 1e6)
{
fprintf(stderr, "WARNING: Center frequency should be in range, setting to 100MHz\n");
frequency = 100000000;
}
r = rtlsdr_set_center_freq(dev, frequency);
if (r < 0) fprintf(stderr, "WARNING: Failed to set center freq.\n");
else fprintf(stderr, "Tuned to %f MHz.\n", frequency/1e6);
sprintf(strFreq,"%4.0f",frequency/1e6);
/* Set the gain */
int gain = 0;
if(argv[2]) gain = atoi(argv[2]);
if (!gain)
{
/* Enable automatic gain */
r = rtlsdr_set_tuner_gain_mode(dev, 0);
if (r < 0) fprintf(stderr, "WARNING: Failed to enable automatic gain.\n");
}
else
{
/* Enable manual gain */
r = rtlsdr_set_tuner_gain_mode(dev, 1);
if (r < 0) fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
/* Set the tuner gain */
r = rtlsdr_set_tuner_gain(dev, gain);
if (r < 0)
{
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
fprintf(stderr, "Valid values for e4000 are: -10, 15, 40, 65, 90, 115, 140, 165, 190, 215, 240, 290, 340, 420, 430, 450, 470, 490\n");
fprintf(stderr, "Valid values for r820t are: 9, 14, 27, 37, 77, 87, 125, 144, 157, 166, 197, 207, 229, 254, 280, 297,\n\t328, 338, 364, 372, 386, 402, 421, 434, 439, 445, 480, 496\n");
fprintf(stderr, "Gain values are in tenths of dB, e.g. 115 means 11.5 dB.\n");
}
else fprintf(stderr, "Tuner gain set to %f dB.\n", gain/10.0);
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0) fprintf(stderr, "WARNING: Failed to reset buffers.\n");
///
// setup fftw
///
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
buffer = malloc(out_block_size * sizeof(uint8_t));
fftw_in = fftw_malloc ( sizeof ( fftw_complex ) * out_block_size/2 );
fftw_out = fftw_malloc ( sizeof ( fftw_complex ) * out_block_size/2 );
// put the plan on FFTW_MEASURE to calculate the optimal fft plan (takes a few seconds).
// If performance of FFTW_ESTIMATE is good enough use that one
//fftw_p = fftw_plan_dft_1d ( out_block_size/2, fftw_in, fftw_out, FFTW_FORWARD, FFTW_MEASURE );
fftw_p = fftw_plan_dft_1d ( out_block_size/2, fftw_in, fftw_out, FFTW_FORWARD, FFTW_ESTIMATE );
/* start reading samples */
fprintf(stderr, "Update frequency is %.2fHz.\n",((double)DEFAULT_SAMPLE_RATE / (double)DEFAULT_BUF_LENGTH));
fprintf(stderr, "Press [q,w] to change frequency, [a,z] to adjust waterfall color sensitivity, ESC to quit.\n");
pwr_max = 0.0f;
pwr_diff = 1.0f;
glutTimerFunc(0,readData,0);
glutMainLoop();
return 0;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
char *filename = NULL;
int i, length, n_read, r, opt, wb_mode = 0;
int f_set = 0;
int gain = AUTO_GAIN; // tenths of a dB
uint8_t *buffer;
uint32_t dev_index = 0;
int device_count;
int ppm_error = 0;
int interval = 10;
int fft_threads = 1;
int smoothing = 0;
int single = 0;
double crop = 0.0;
char vendor[256], product[256], serial[256];
char *freq_optarg;
time_t next_tick;
time_t time_now;
time_t exit_time = 0;
char t_str[50];
struct tm *cal_time;
double (*window_fn)(int, int) = rectangle;
freq_optarg = "";
while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:1Fh")) != -1) {
switch (opt) {
case 'f': // lower:upper:bin_size
freq_optarg = strdup(optarg);
f_set = 1;
break;
case 'd':
dev_index = atoi(optarg);
break;
case 'g':
gain = (int)(atof(optarg) * 10);
break;
case 'c':
crop = atofp(optarg);
break;
case 'i':
interval = (int)round(atoft(optarg));
break;
case 'e':
exit_time = (time_t)((int)round(atoft(optarg)));
break;
case 's':
if (strcmp("avg", optarg) == 0) {
smoothing = 0;}
if (strcmp("iir", optarg) == 0) {
smoothing = 1;}
break;
case 'w':
if (strcmp("rectangle", optarg) == 0) {
window_fn = rectangle;}
if (strcmp("hamming", optarg) == 0) {
window_fn = hamming;}
if (strcmp("blackman", optarg) == 0) {
window_fn = blackman;}
if (strcmp("blackman-harris", optarg) == 0) {
window_fn = blackman_harris;}
if (strcmp("hann-poisson", optarg) == 0) {
window_fn = hann_poisson;}
if (strcmp("youssef", optarg) == 0) {
window_fn = youssef;}
if (strcmp("kaiser", optarg) == 0) {
window_fn = kaiser;}
if (strcmp("bartlett", optarg) == 0) {
window_fn = bartlett;}
break;
case 't':
fft_threads = atoi(optarg);
break;
case 'p':
ppm_error = atoi(optarg);
break;
case '1':
single = 1;
break;
case 'F':
boxcar = 0;
break;
case 'h':
default:
usage();
break;
}
}
if (!f_set) {
fprintf(stderr, "No frequency range provided.\n");
exit(1);
}
if ((crop < 0.0) || (crop > 1.0)) {
fprintf(stderr, "Crop value outside of 0 to 1.\n");
exit(1);
}
frequency_range(freq_optarg, crop);
if (tune_count == 0) {
usage();}
if (argc <= optind) {
filename = "-";
} else {
filename = argv[optind];
}
if (interval < 1) {
interval = 1;}
fprintf(stderr, "Reporting every %i seconds\n", interval);
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
/* Set the tuner gain */
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
gain = nearest_gain(gain);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
r = rtlsdr_set_freq_correction(dev, ppm_error);
if (strcmp(filename, "-") == 0) { /* Write log to stdout */
file = stdout;
#ifdef _WIN32
// Is this necessary? Output is ascii.
_setmode(_fileno(file), _O_BINARY);
#endif
} else {
file = fopen(filename, "wb");
if (!file) {
fprintf(stderr, "Failed to open %s\n", filename);
exit(1);
}
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to reset buffers.\n");}
/* actually do stuff */
rtlsdr_set_sample_rate(dev, (uint32_t)tunes[0].rate);
sine_table(tunes[0].bin_e);
next_tick = time(NULL) + interval;
if (exit_time) {
exit_time = time(NULL) + exit_time;}
fft_buf = malloc(tunes[0].buf_len * sizeof(int16_t));
length = 1 << tunes[0].bin_e;
window_coefs = malloc(length * sizeof(int));
for (i=0; i<length; i++) {
window_coefs[i] = (int)(256*window_fn(i, length));
}
while (!do_exit) {
scanner();
time_now = time(NULL);
if (time_now < next_tick) {
continue;}
// time, Hz low, Hz high, Hz step, samples, dbm, dbm, ...
cal_time = localtime(&time_now);
strftime(t_str, 50, "%Y-%m-%d, %H:%M:%S", cal_time);
for (i=0; i<tune_count; i++) {
fprintf(file, "%s, ", t_str);
csv_dbm(&tunes[i]);
}
fflush(file);
while (time(NULL) >= next_tick) {
next_tick += interval;}
if (single) {
do_exit = 1;}
if (exit_time && time(NULL) >= exit_time) {
do_exit = 1;}
}
/* clean up */
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
if (file != stdout) {
fclose(file);}
rtlsdr_close(dev);
free(fft_buf);
free(window_coefs);
//for (i=0; i<tune_count; i++) {
// free(tunes[i].avg);
// free(tunes[i].buf8);
//}
return r >= 0 ? r : -r;
}
static int do_sdr_decode(struct dab_state_t* dab, int frequency, int gain)
{
struct sigaction sigact;
uint32_t dev_index = 0;
int32_t device_count;
int i,r;
char vendor[256], product[256], serial[256];
uint32_t samp_rate = 2048000;
memset(&sdr,0,sizeof(struct sdr_state_t));
sdr.frequency = frequency;
//fprintf(stderr,"%i\n",sdr.frequency);
/*---------------------------------------------------
Looking for device and open connection
----------------------------------------------------*/
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
int gains[100];
int count = rtlsdr_get_tuner_gains(dev, gains);
fprintf(stderr, "Supported gain values (%d): ", count);
for (i = 0; i < count; i++)
fprintf(stderr, "%.1f ", gains[i] / 10.0);
fprintf(stderr, "\n");
/*-------------------------------------------------
Set Frequency & Sample Rate
--------------------------------------------------*/
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, sdr.frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else
fprintf(stderr, "Tuned to %u Hz.\n", sdr.frequency);
/*------------------------------------------------
Setting gain
-------------------------------------------------*/
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
/*-----------------------------------------------
/ Reset endpoint (mandatory)
------------------------------------------------*/
r = rtlsdr_reset_buffer(dev);
/*-----------------------------------------------
/ Signal handler
------------------------------------------------*/
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
/*-----------------------------------------------
/ start demod thread & rtl read
-----------------------------------------------*/
fprintf(stderr,"Waiting for sync...\n");
sdr_init(&sdr);
//dab_fic_parser_init(&sinfo);
//dab_analyzer_init(&ana);
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(dab));
rtlsdr_read_async(dev, rtlsdr_callback, (void *)(&sdr),
DEFAULT_ASYNC_BUF_NUMBER, DEFAULT_BUF_LENGTH);
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
//dab_demod_close(&dab);
rtlsdr_close(dev);
return 1;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
char *filename = NULL;
int n_read;
int r, opt;
int i, gain = 0;
int sync_mode = 0;
FILE *file;
uint8_t *buffer;
uint32_t dev_index = 0;
uint32_t udp_port = 6666;
uint32_t frequency = 100000000;
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
int device_count;
char vendor[256], product[256], serial[256];
while ((opt = getopt(argc, argv, "d:p:f:g:s:b:n:S::")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 'p':
udp_port = atoi(optarg);
break;
case 'f':
frequency = (uint32_t)atof(optarg);
break;
case 'g':
gain = (int)(atof(optarg) * 10); /* tenths of a dB */
break;
case 's':
samp_rate = (uint32_t)atof(optarg);
break;
case 'b':
out_block_size = (uint32_t)atof(optarg);
break;
case 'n':
bytes_to_read = (uint32_t)atof(optarg) * 2;
break;
case 'S':
sync_mode = 1;
break;
default:
usage();
break;
}
}
if (argc <= optind) {
usage();
} else {
filename = argv[optind];
}
if(out_block_size < MINIMAL_BUF_LENGTH ||
out_block_size > MAXIMAL_BUF_LENGTH ){
fprintf(stderr,
"Output block size wrong value, falling back to default\n");
fprintf(stderr,
"Minimal length: %u\n", MINIMAL_BUF_LENGTH);
fprintf(stderr,
"Maximal length: %u\n", MAXIMAL_BUF_LENGTH);
out_block_size = DEFAULT_BUF_LENGTH;
}
buffer = malloc(out_block_size * sizeof(uint8_t));
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index, rtlsdr_get_device_name(dev_index));
//--------------------------------------------------
fd = socket(AF_INET,SOCK_DGRAM,0);
if(fd==-1)
{
perror("socket");
exit(-1);
}
fprintf(stderr, "create socket OK!\n");
//create an send address
addr.sin_family = AF_INET;
addr.sin_port = htons(udp_port);
addr.sin_addr.s_addr=inet_addr("127.0.0.1");
fprintf(stderr, "127.0.0.1:%u\n", udp_port);
//--------------------------------------------------
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else
fprintf(stderr, "Tuned to %u Hz.\n", frequency);
if (0 == gain) {
/* Enable automatic gain */
r = rtlsdr_set_tuner_gain_mode(dev, 0);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable automatic gain.\n");
} else {
/* Enable manual gain */
r = rtlsdr_set_tuner_gain_mode(dev, 1);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
/* Set the tuner gain */
r = rtlsdr_set_tuner_gain(dev, gain);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
else
fprintf(stderr, "Tuner gain set to %f dB.\n", gain/10.0);
}
if(strcmp(filename, "-") == 0) { /* Write samples to stdout */
file = stdout;
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
#endif
} else {
file = fopen(filename, "wb");
if (!file) {
fprintf(stderr, "Failed to open %s\n", filename);
goto out;
}
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0)
fprintf(stderr, "WARNING: Failed to reset buffers.\n");
if (sync_mode) {
fprintf(stderr, "Reading samples in sync mode...\n");
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t)n_read)) {
n_read = bytes_to_read;
do_exit = 1;
}
if (fwrite(buffer, 1, n_read, file) != (size_t)n_read) {
fprintf(stderr, "Short write, samples lost, exiting!\n");
break;
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
if (bytes_to_read > 0)
bytes_to_read -= n_read;
}
} else {
fprintf(stderr, "Reading samples in async mode...\n");
r = rtlsdr_read_async(dev, rtlsdr_callback, (void *)file,
DEFAULT_ASYNC_BUF_NUMBER, out_block_size);
}
if (do_exit)
fprintf(stderr, "\nUser cancel, exiting...\n");
else
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);
if (file != stdout)
fclose(file);
rtlsdr_close(dev);
free (buffer);
close(fd);
out:
return r >= 0 ? r : -r;
}
int main(int argc, char* argv[])
{
int rv;
async_started = 0;
quit_please = 0;
buffers_received = 0;
signal(SIGINT, sighandler);
printf("Opening output file...\n");
outf = fopen("rtlsdr_out.bin", "w");
if(outf == NULL) {
printf("Error opening output file: %d.\nExiting.\n", errno);
return 1;
}
rv = rtlsdr_get_device_count();
if(rv == 0) {
printf("No RTL-SDR devices found, exiting.\n");
return 2;
}
printf("Found %d device(s).\n", rv);
printf("Opening the first, '%s'...\n", rtlsdr_get_device_name(0));
rv = rtlsdr_open(&rtlsdr, 0);
if(rv != 0) {
printf("Error opening device: %d\nExiting.\n", rv);
return 3;
}
printf("Setting frequency to 315MHz...\n");
rv = rtlsdr_set_center_freq(rtlsdr, 315000000);
if(rv != 0) {
printf("Error setting frequency: %d\nExiting.\n", rv);
return 4;
}
printf("Frequency set to %uHz.\n", rtlsdr_get_center_freq(rtlsdr));
printf("Setting gain mode to automatic.\n");
rv = rtlsdr_set_tuner_gain_mode(rtlsdr, 0);
if(rv != 0) {
printf("Error setting gain mode: %d\nExiting.\n", rv);
return 5;
}
printf("Gain currently set to %d.\n", rtlsdr_get_tuner_gain(rtlsdr));
printf("Setting sample rate to 240kHz...\n");
rv = rtlsdr_set_sample_rate(rtlsdr, 240000);
if(rv != 0) {
printf("Error setting sample rate: %d\nExiting.\n", rv);
return 6;
}
printf("Sample rate set to %u.\n", rtlsdr_get_sample_rate(rtlsdr));
printf("Setting AGC on...\n");
rv = rtlsdr_set_agc_mode(rtlsdr, 1);
if(rv != 0) {
printf("Error setting AGC: %d\nExiting.\n", rv);
return 7;
}
printf("Clearing buffer and streaming data...\n");
rv = rtlsdr_reset_buffer(rtlsdr);
if(rv != 0) {
printf("Error clearing buffer: %d\nExiting.\n", rv);
return 8;
}
async_started = 1;
rv = rtlsdr_read_async(rtlsdr, read_callback, NULL, 0, 0);
if(rv != 0) {
printf("Error setting up async streaming: %d\nExiting.\n", rv);
return 9;
}
rtlsdr_cancel_async(rtlsdr);
rtlsdr_close(rtlsdr);
return 0;
}
int main(int argc, char **argv)
{
struct sigaction sigact;
char *filename = NULL;
int r, opt;
int i, gain = AUTO_GAIN; /* tenths of a dB */
int dev_index = 0;
int dev_given = 0;
int ppm_error = 0;
int custom_ppm = 0;
int left_freq = 161975000;
int right_freq = 162025000;
int sample_rate = 12000;
int output_rate = 48000;
int dongle_freq, dongle_rate, delta;
int edge = 0;
pthread_cond_init(&ready, NULL);
pthread_mutex_init(&ready_m, NULL);
while ((opt = getopt(argc, argv, "l:r:s:o:EODd:g:p:h")) != -1)
{
switch (opt) {
case 'l':
left_freq = (int)atofs(optarg);
break;
case 'r':
right_freq = (int)atofs(optarg);
break;
case 's':
sample_rate = (int)atofs(optarg);
break;
case 'o':
output_rate = (int)atofs(optarg);
break;
case 'E':
edge = !edge;
break;
case 'D':
dc_filter = !dc_filter;
break;
case 'O':
oversample = !oversample;
break;
case 'd':
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
case 'g':
gain = (int)(atof(optarg) * 10);
break;
case 'p':
ppm_error = atoi(optarg);
custom_ppm = 1;
break;
case 'h':
default:
usage();
return 2;
}
}
if (argc <= optind) {
filename = "-";
} else {
filename = argv[optind];
}
if (left_freq > right_freq) {
usage();
return 2;
}
/* precompute rates */
dongle_freq = left_freq/2 + right_freq/2;
if (edge) {
dongle_freq -= sample_rate/2;}
delta = right_freq - left_freq;
if (delta > 1.2e6) {
fprintf(stderr, "Frequencies may be at most 1.2MHz apart.");
exit(1);
}
if (delta < 0) {
fprintf(stderr, "Left channel must be lower than right channel.");
exit(1);
}
i = (int)log2(2.4e6 / delta);
dongle_rate = delta * (1<<i);
both.rate_in = dongle_rate;
both.rate_out = delta * 2;
i = (int)log2(both.rate_in/both.rate_out);
both.downsample_passes = i;
both.downsample = 1 << i;
left.rate_in = both.rate_out;
i = (int)log2(left.rate_in / sample_rate);
left.downsample_passes = i;
left.downsample = 1 << i;
left.rate_out = left.rate_in / left.downsample;
right.rate_in = left.rate_in;
right.rate_out = left.rate_out;
right.downsample = left.downsample;
right.downsample_passes = left.downsample_passes;
if (left.rate_out > output_rate) {
fprintf(stderr, "Channel bandwidth too high or output bandwidth too low.");
exit(1);
}
stereo.rate = output_rate;
if (edge) {
fprintf(stderr, "Edge tuning enabled.\n");
} else {
fprintf(stderr, "Edge tuning disabled.\n");
}
if (dc_filter) {
fprintf(stderr, "DC filter enabled.\n");
} else {
fprintf(stderr, "DC filter disabled.\n");
}
fprintf(stderr, "Buffer size: %0.2f mS\n", 1000 * (double)DEFAULT_BUF_LENGTH / (double)dongle_rate);
fprintf(stderr, "Downsample factor: %i\n", both.downsample * left.downsample);
fprintf(stderr, "Low pass: %i Hz\n", left.rate_out);
fprintf(stderr, "Output: %i Hz\n", output_rate);
/* precompute lengths */
both.len_in = DEFAULT_BUF_LENGTH;
both.len_out = both.len_in / both.downsample;
left.len_in = both.len_out;
right.len_in = both.len_out;
left.len_out = left.len_in / left.downsample;
right.len_out = right.len_in / right.downsample;
left_demod.buf_len = left.len_out;
left_demod.result_len = left_demod.buf_len / 2;
right_demod.buf_len = left_demod.buf_len;
right_demod.result_len = left_demod.result_len;
stereo.bl_len = (int)((long)(DEFAULT_BUF_LENGTH/2) * (long)output_rate / (long)dongle_rate);
stereo.br_len = stereo.bl_len;
stereo.result_len = stereo.br_len * 2;
stereo.rate = output_rate;
if (!dev_given) {
dev_index = verbose_device_search("0");
}
if (dev_index < 0) {
exit(1);
}
downsample_init(&both);
downsample_init(&left);
downsample_init(&right);
demod_init(&left_demod);
demod_init(&right_demod);
stereo_init(&stereo);
r = rtlsdr_open(&dev, (uint32_t)dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
if (strcmp(filename, "-") == 0) { /* Write samples to stdout */
file = stdout;
setvbuf(stdout, NULL, _IONBF, 0);
} else {
file = fopen(filename, "wb");
if (!file) {
fprintf(stderr, "Failed to open %s\n", filename);
exit(1);
}
}
/* Set the tuner gain */
if (gain == AUTO_GAIN) {
verbose_auto_gain(dev);
} else {
gain = nearest_gain(dev, gain);
verbose_gain_set(dev, gain);
}
if (!custom_ppm) {
verbose_ppm_eeprom(dev, &ppm_error);
}
verbose_ppm_set(dev, ppm_error);
//r = rtlsdr_set_agc_mode(dev, 1);
/* Set the tuner frequency */
verbose_set_frequency(dev, dongle_freq);
/* Set the sample rate */
verbose_set_sample_rate(dev, dongle_rate);
/* Reset endpoint before we start reading from it (mandatory) */
verbose_reset_buffer(dev);
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(NULL));
rtlsdr_read_async(dev, rtlsdr_callback, (void *)(NULL),
DEFAULT_ASYNC_BUF_NUMBER,
DEFAULT_BUF_LENGTH);
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
safe_cond_signal(&ready, &ready_m);
pthread_cond_destroy(&ready);
pthread_mutex_destroy(&ready_m);
if (file != stdout) {
fclose(file);}
rtlsdr_close(dev);
return r >= 0 ? r : -r;
}
// main program
int main (int argc, char **argv)
{
// command-line options
int verbose = 1;
int ppm_error = 0;
int gain = 0;
unsigned int nfft = 64;
float offset = -65.0f;
float scale = 5.0f;
float fft_rate = 10.0f;
float rx_resamp_rate;
float bandwidth = 800e3f;
unsigned int logsize = 4096;
char filename[256] = "rtl_asgram.dat";
int r, n_read;
uint32_t frequency = 100000000;
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
uint8_t *buffer;
int dev_index = 0;
int dev_given = 0;
struct sigaction sigact;
normalizer_t *norm;
//
int d;
while ((d = getopt(argc,argv,"hf:b:B:G:n:p:s:o:r:L:F:")) != EOF) {
switch (d) {
case 'h':
usage();
return 0;
case 'f':
frequency = atof(optarg);
break;
case 'b':
bandwidth = atof(optarg);
break;
case 'B':
out_block_size = (uint32_t)atof(optarg);
break;
case 'G':
gain = (int)(atof(optarg) * 10);
break;
case 'n':
nfft = atoi(optarg);
break;
case 'o':
offset = atof(optarg);
break;
case 'p':
ppm_error = atoi(optarg);
break;
case 's':
samp_rate = (uint32_t)atofs(optarg);
break;
case 'r':
fft_rate = atof(optarg);
break;
case 'L':
logsize = atoi(optarg);
break;
case 'F':
strncpy(filename,optarg,255);
break;
case 'd':
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
default:
usage();
return 1;
}
}
// validate parameters
if (fft_rate <= 0.0f || fft_rate > 100.0f) {
fprintf(stderr,"error: %s, fft rate must be in (0, 100) Hz\n", argv[0]);
exit(1);
}
if (!dev_given) {
dev_index = verbose_device_search("0");
}
if (dev_index < 0) {
exit(1);
}
r = rtlsdr_open(&dev, (uint32_t)dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
/* Set the sample rate */
verbose_set_sample_rate(dev, samp_rate);
/* Set the frequency */
verbose_set_frequency(dev, frequency);
if (0 == gain) {
/* Enable automatic gain */
verbose_auto_gain(dev);
} else {
/* Enable manual gain */
gain = nearest_gain(dev, gain);
verbose_gain_set(dev, gain);
}
verbose_ppm_set(dev, ppm_error);
rx_resamp_rate = bandwidth/samp_rate;
printf("frequency : %10.4f [MHz]\n", frequency*1e-6f);
printf("bandwidth : %10.4f [kHz]\n", bandwidth*1e-3f);
printf("sample rate : %10.4f kHz = %10.4f kHz * %8.6f\n",
samp_rate * 1e-3f,
bandwidth * 1e-3f,
1.0f / rx_resamp_rate);
printf("verbosity : %s\n", (verbose?"enabled":"disabled"));
unsigned int i;
// add arbitrary resampling component
msresamp_crcf resamp = msresamp_crcf_create(rx_resamp_rate, 60.0f);
assert(resamp);
// create buffer for sample logging
windowcf log = windowcf_create(logsize);
// create ASCII spectrogram object
float maxval;
float maxfreq;
char ascii[nfft+1];
ascii[nfft] = '\0'; // append null character to end of string
asgram q = asgram_create(nfft);
asgram_set_scale(q, offset, scale);
// assemble footer
unsigned int footer_len = nfft + 16;
char footer[footer_len+1];
for (i=0; i<footer_len; i++)
footer[i] = ' ';
footer[1] = '[';
footer[nfft/2 + 3] = '+';
footer[nfft + 4] = ']';
sprintf(&footer[nfft+6], "%8.3f MHz", frequency*1e-6f);
unsigned int msdelay = 1000 / fft_rate;
// create/initialize Hamming window
float w[nfft];
for (i=0; i<nfft; i++)
w[i] = hamming(i,nfft);
//allocate recv buffer
buffer = malloc(out_block_size * sizeof(uint8_t));
assert(buffer);
// create buffer for arbitrary resamper output
int b_len = ((int)(out_block_size * rx_resamp_rate) + 64) >> 1;
complex float buffer_resamp[b_len];
debug("resamp_buffer_len: %d", b_len);
// timer to control asgram output
timer t1 = timer_create();
timer_tic(t1);
norm = normalizer_create();
verbose_reset_buffer(dev);
while (!do_exit) {
// grab data from device
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t)n_read)) {
n_read = bytes_to_read;
do_exit = 1;
}
// push data through arbitrary resampler and give to frame synchronizer
// TODO : apply bandwidth-dependent gain
for (i=0; i<n_read/2; i++) {
// grab sample from usrp buffer
complex float rtlsdr_sample = normalizer_normalize(norm, *((uint16_t*)buffer+i));
// push through resampler (one at a time)
unsigned int nw;
msresamp_crcf_execute(resamp, &rtlsdr_sample, 1, buffer_resamp, &nw);
// push resulting samples into asgram object
asgram_push(q, buffer_resamp, nw);
// write samples to log
windowcf_write(log, buffer_resamp, nw);
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
if (bytes_to_read > 0)
bytes_to_read -= n_read;
if (timer_toc(t1) > msdelay*1e-3f) {
// reset timer
timer_tic(t1);
// run the spectrogram
asgram_execute(q, ascii, &maxval, &maxfreq);
// print the spectrogram
printf(" > %s < pk%5.1fdB [%5.2f]\n", ascii, maxval, maxfreq);
printf("%s\r", footer);
fflush(stdout);
}
}
// try to write samples to file
FILE * fid = fopen(filename,"w");
if (fid != NULL) {
// write header
fprintf(fid, "# %s : auto-generated file\n", filename);
fprintf(fid, "#\n");
fprintf(fid, "# num_samples : %u\n", logsize);
fprintf(fid, "# frequency : %12.8f MHz\n", frequency*1e-6f);
fprintf(fid, "# bandwidth : %12.8f kHz\n", bandwidth*1e-3f);
// save results to file
complex float * rc; // read pointer
windowcf_read(log, &rc);
for (i=0; i<logsize; i++)
fprintf(fid, "%12.4e %12.4e\n", crealf(rc[i]), cimagf(rc[i]));
// close it up
fclose(fid);
printf("results written to '%s'\n", filename);
} else {
fprintf(stderr,"error: %s, could not open '%s' for writing\n", argv[0], filename);
}
// destroy objects
normalizer_destroy(&norm);
msresamp_crcf_destroy(resamp);
windowcf_destroy(log);
asgram_destroy(q);
timer_destroy(t1);
rtlsdr_close(dev);
free (buffer);
return 0;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
char *filename = NULL;
int n_read;
int r, opt;
int gain = 0;
int ppm_error = 0;
int sync_mode = 0;
FILE *file;
uint8_t *buffer;
int dev_index = 0;
int dev_given = 0;
uint32_t frequency = 100000000;
uint32_t bandwidth = DEFAULT_BANDWIDTH;
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
while ((opt = getopt(argc, argv, "d:f:g:s:w:b:n:p:S")) != -1) {
switch (opt) {
case 'd':
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
case 'f':
frequency = (uint32_t)atofs(optarg);
break;
case 'g':
gain = (int)(atof(optarg) * 10); /* tenths of a dB */
break;
case 's':
samp_rate = (uint32_t)atofs(optarg);
break;
case 'w':
bandwidth = (uint32_t)atofs(optarg);
break;
case 'p':
ppm_error = atoi(optarg);
break;
case 'b':
out_block_size = (uint32_t)atof(optarg);
break;
case 'n':
bytes_to_read = (uint32_t)atof(optarg) * 2;
break;
case 'S':
sync_mode = 1;
break;
default:
usage();
break;
}
}
if (argc <= optind) {
usage();
} else {
filename = argv[optind];
}
if(out_block_size < MINIMAL_BUF_LENGTH ||
out_block_size > MAXIMAL_BUF_LENGTH ){
fprintf(stderr,
"Output block size wrong value, falling back to default\n");
fprintf(stderr,
"Minimal length: %u\n", MINIMAL_BUF_LENGTH);
fprintf(stderr,
"Maximal length: %u\n", MAXIMAL_BUF_LENGTH);
out_block_size = DEFAULT_BUF_LENGTH;
}
buffer = malloc(out_block_size * sizeof(uint8_t));
if (!dev_given) {
dev_index = verbose_device_search("0");
}
if (dev_index < 0) {
exit(1);
}
r = rtlsdr_open(&dev, (uint32_t)dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
/* Set the sample rate */
verbose_set_sample_rate(dev, samp_rate);
/* Set the tuner bandwidth */
verbose_set_bandwidth(dev, bandwidth);
/* Set the frequency */
verbose_set_frequency(dev, frequency);
if (0 == gain) {
/* Enable automatic gain */
verbose_auto_gain(dev);
} else {
/* Enable manual gain */
gain = nearest_gain(dev, gain);
verbose_gain_set(dev, gain);
}
verbose_ppm_set(dev, ppm_error);
if(strcmp(filename, "-") == 0) { /* Write samples to stdout */
file = stdout;
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
#endif
} else {
file = fopen(filename, "wb");
if (!file) {
fprintf(stderr, "Failed to open %s\n", filename);
goto out;
}
}
/* Reset endpoint before we start reading from it (mandatory) */
verbose_reset_buffer(dev);
if (sync_mode) {
fprintf(stderr, "Reading samples in sync mode...\n");
while (!do_exit) {
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t)n_read)) {
n_read = bytes_to_read;
do_exit = 1;
}
if (fwrite(buffer, 1, n_read, file) != (size_t)n_read) {
fprintf(stderr, "Short write, samples lost, exiting!\n");
break;
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
if (bytes_to_read > 0)
bytes_to_read -= n_read;
}
} else {
fprintf(stderr, "Reading samples in async mode...\n");
r = rtlsdr_read_async(dev, rtlsdr_callback, (void *)file,
0, out_block_size);
}
if (do_exit)
fprintf(stderr, "\nUser cancel, exiting...\n");
else
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);
if (file != stdout)
fclose(file);
rtlsdr_close(dev);
free (buffer);
out:
return r >= 0 ? r : -r;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
struct fm_state fm;
char *filename = NULL;
int n_read;
int r, opt;
int i, gain = AUTO_GAIN; // tenths of a dB
uint8_t *buffer;
uint32_t dev_index = 0;
int device_count;
char vendor[256], product[256], serial[256];
fm.freqs[0] = 100000000;
fm.sample_rate = DEFAULT_SAMPLE_RATE;
fm.squelch_level = 150;
fm.term_squelch_hits = 0;
fm.freq_len = 0;
fm.edge = 0;
fm.fir_enable = 0;
fm.prev_index = -1;
fm.post_downsample = 1; // once this works, default = 4
fm.custom_atan = 0;
sem_init(&data_ready, 0, 0);
while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:EFA")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 'f':
fm.freqs[fm.freq_len] = (uint32_t)atof(optarg);
fm.freq_len++;
break;
case 'g':
gain = (int)(atof(optarg) * 10);
break;
case 'l':
fm.squelch_level = (int)atof(optarg);
break;
case 's':
fm.sample_rate = (uint32_t)atof(optarg);
break;
case 'o':
fm.post_downsample = (int)atof(optarg);
break;
case 't':
fm.term_squelch_hits = (int)atof(optarg);
break;
case 'E':
fm.edge = 1;
break;
case 'F':
fm.fir_enable = 1;
break;
case 'A':
fm.custom_atan = 1;
break;
default:
usage();
break;
}
}
/* quadruple sample_rate to limit to Δθ to ±π/2 */
fm.sample_rate *= fm.post_downsample;
if (argc <= optind) {
usage();
} else {
filename = argv[optind];
}
buffer = malloc(DEFAULT_BUF_LENGTH * sizeof(uint8_t));
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
optimal_settings(&fm, 0, 0);
build_fir(&fm);
/* Set the tuner gain */
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
if (strcmp(filename, "-") == 0) { /* Write samples to stdout */
fm.file = stdout;
} else {
fm.file = fopen(filename, "wb");
if (!fm.file) {
fprintf(stderr, "Failed to open %s\n", filename);
exit(1);
}
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to reset buffers.\n");}
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(&fm));
rtlsdr_read_async(dev, rtlsdr_callback, (void *)(&fm),
DEFAULT_ASYNC_BUF_NUMBER, DEFAULT_BUF_LENGTH);
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
if (fm.file != stdout)
fclose(fm.file);
rtlsdr_close(dev);
free (buffer);
return r >= 0 ? r : -r;
}
// Initilizes and Opens the RTL Dongle
void Init_Device(int mode)
{
int r;
int i = 0;
int gain = 496; //496;//0;//125;//386;
/*
{ 0, 9, 14, 27, 37, 77, 87, 125, 144, 157,
166, 197, 207, 229, 254, 280, 297, 328,
338, 364, 372, 386, 402, 421, 434, 439,
445, 480, 496 };
*/
uint32_t dev_index = 0;
uint32_t frequency = (d1.freq + d1.freqcorr) * 1e6; //1433170000;//1420400000;//1409246000;//1407630000;//34000000;//1420400000;//1421550000;//99500000;//100000000;
uint32_t samp_rate = 2.4 * 1e6 + 0.5; //1400000;//2400000;//DEFAULT_SAMPLE_RATE;
int device_count;
char vendor[256], product[256], serial[256];
d1.dongle = 1;
if (mode) {
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else if (d1.printout)
printf("Tuned to %u Hz.\n", frequency);
return;
}
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
if (d1.printout)
printf("Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
if (d1.printout)
printf(" %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
if (d1.printout)
printf("Using device %d: %s\n", dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else if (d1.printout)
printf("Tuned to %u Hz.\n", frequency);
if (0 == gain) {
/* Enable automatic gain */
r = rtlsdr_set_tuner_gain_mode(dev, 0);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable automatic gain.\n");
} else {
/* Enable manual gain */
r = rtlsdr_set_tuner_gain_mode(dev, 1);
if (r < 0)
fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
/* Set the tuner gain */// doesn't set gain to gain value - uses R828_Arry[0] = (R828_Arry[0] & 0xF0) | 0x0F;//0x06;//gLNA;//lna_index
r = rtlsdr_set_tuner_gain(dev, gain);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
}
r = rtlsdr_reset_buffer(dev);
// printf("Reset Status: %u \n", r);
}
// main program
int main (int argc, char **argv)
{
// command-line options
int verbose = 1;
int ppm_error = 0;
int gain = 0;
float rx_resamp_rate;
float bandwidth = 800e3f;
int r, n_read;
uint32_t frequency = 100000000;
uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH;
uint8_t *buffer;
complex float *buffer_norm;
int dev_index = 0;
int dev_given = 0;
struct sigaction sigact;
normalizer_t *norm;
float kf = 0.1f; // modulation factor
liquid_freqdem_type type = LIQUID_FREQDEM_DELAYCONJ;
//
int d;
while ((d = getopt(argc,argv,"hf:b:B:G:p:s:")) != EOF) {
switch (d) {
case 'h': usage(); return 0;
case 'f': frequency = atof(optarg); break;
case 'b': bandwidth = atof(optarg); break;
case 'B': out_block_size = (uint32_t)atof(optarg); break;
case 'G': gain = (int)(atof(optarg) * 10); break;
case 'p': ppm_error = atoi(optarg); break;
case 's': samp_rate = (uint32_t)atofs(optarg); break;
case 'd':
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
default: usage(); return 1;
}
}
if (!dev_given) {
dev_index = verbose_device_search("0");
}
if (dev_index < 0) {
exit(1);
}
r = rtlsdr_open(&dev, (uint32_t)dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
/* Set the sample rate */
verbose_set_sample_rate(dev, samp_rate);
/* Set the frequency */
verbose_set_frequency(dev, frequency);
if (0 == gain) {
/* Enable automatic gain */
verbose_auto_gain(dev);
} else {
/* Enable manual gain */
gain = nearest_gain(dev, gain);
verbose_gain_set(dev, gain);
}
verbose_ppm_set(dev, ppm_error);
rx_resamp_rate = bandwidth/samp_rate;
printf("frequency : %10.4f [MHz]\n", frequency*1e-6f);
printf("bandwidth : %10.4f [kHz]\n", bandwidth*1e-3f);
printf("sample rate : %10.4f kHz = %10.4f kHz * %8.6f\n",
samp_rate * 1e-3f,
bandwidth * 1e-3f,
1.0f / rx_resamp_rate);
printf("verbosity : %s\n", (verbose?"enabled":"disabled"));
unsigned int i,j;
// add arbitrary resampling component
msresamp_crcf resamp = msresamp_crcf_create(rx_resamp_rate, 60.0f);
assert(resamp);
//allocate recv buffer
buffer = malloc(out_block_size * sizeof(uint8_t));
assert(buffer);
buffer_norm = malloc(out_block_size * sizeof(complex float));
assert(buffer_norm);
// create buffer for arbitrary resamper output
int b_len = ((int)(out_block_size * rx_resamp_rate) + 64) >> 1;
complex float buffer_resamp[b_len];
int16_t buffer_demod[b_len];
debug("resamp_buffer_len: %d\n", b_len);
norm = normalizer_create();
verbose_reset_buffer(dev);
freqdem dem = freqdem_create(kf,type);
while (!do_exit) {
// grab data from device
r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read);
if (r < 0) {
fprintf(stderr, "WARNING: sync read failed.\n");
break;
}
if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t)n_read)) {
n_read = bytes_to_read;
do_exit = 1;
}
// push data through arbitrary resampler and give to frame synchronizer
// TODO : apply bandwidth-dependent gain
for (i=0; i<n_read/2; i++) {
// grab sample from usrp buffer
buffer_norm[i] = normalizer_normalize(norm, *((uint16_t*)buffer+i));
}
// push through resampler (one at a time)
unsigned int nw;
float demod;
msresamp_crcf_execute(resamp, buffer_norm, n_read/2, buffer_resamp, &nw);
for(j=0;j<nw;j++)
{
freqdem_demodulate(dem, buffer_resamp[j], &demod);
buffer_demod[j] = to_int16(demod);
}
if (fwrite(buffer_demod, 2, nw, stdout) != (size_t)nw) {
fprintf(stderr, "Short write, samples lost, exiting!\n");
break;
}
if ((uint32_t)n_read < out_block_size) {
fprintf(stderr, "Short read, samples lost, exiting!\n");
break;
}
if (bytes_to_read > 0)
bytes_to_read -= n_read;
}
// destroy objects
freqdem_destroy(dem);
normalizer_destroy(&norm);
msresamp_crcf_destroy(resamp);
rtlsdr_close(dev);
free (buffer);
return 0;
}
//
// =============================== RTLSDR handling ==========================
//
int modesInitRTLSDR(void) {
int j;
int device_count, dev_index = 0;
char vendor[256], product[256], serial[256];
if (Modes.dev_name) {
if ( (dev_index = verbose_device_search(Modes.dev_name)) < 0 )
return -1;
}
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported RTLSDR devices found.\n");
return -1;
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (j = 0; j < device_count; j++) {
rtlsdr_get_device_usb_strings(j, vendor, product, serial);
fprintf(stderr, "%d: %s, %s, SN: %s %s\n", j, vendor, product, serial,
(j == dev_index) ? "(currently selected)" : "");
}
if (rtlsdr_open(&Modes.dev, dev_index) < 0) {
fprintf(stderr, "Error opening the RTLSDR device: %s\n",
strerror(errno));
return -1;
}
// Set gain, frequency, sample rate, and reset the device
rtlsdr_set_tuner_gain_mode(Modes.dev,
(Modes.gain == MODES_AUTO_GAIN) ? 0 : 1);
if (Modes.gain != MODES_AUTO_GAIN) {
int *gains;
int numgains;
numgains = rtlsdr_get_tuner_gains(Modes.dev, NULL);
if (numgains <= 0) {
fprintf(stderr, "Error getting tuner gains\n");
return -1;
}
gains = malloc(numgains * sizeof(int));
if (rtlsdr_get_tuner_gains(Modes.dev, gains) != numgains) {
fprintf(stderr, "Error getting tuner gains\n");
free(gains);
return -1;
}
if (Modes.gain == MODES_MAX_GAIN) {
int highest = -1;
int i;
for (i = 0; i < numgains; ++i) {
if (gains[i] > highest)
highest = gains[i];
}
Modes.gain = highest;
fprintf(stderr, "Max available gain is: %.2f dB\n", Modes.gain/10.0);
} else {
int closest = -1;
int i;
for (i = 0; i < numgains; ++i) {
if (closest == -1 || abs(gains[i] - Modes.gain) < abs(closest - Modes.gain))
closest = gains[i];
}
if (closest != Modes.gain) {
Modes.gain = closest;
fprintf(stderr, "Closest available gain: %.2f dB\n", Modes.gain/10.0);
}
}
free(gains);
fprintf(stderr, "Setting gain to: %.2f dB\n", Modes.gain/10.0);
if (rtlsdr_set_tuner_gain(Modes.dev, Modes.gain) < 0) {
fprintf(stderr, "Error setting tuner gains\n");
return -1;
}
} else {
fprintf(stderr, "Using automatic gain control.\n");
}
rtlsdr_set_freq_correction(Modes.dev, Modes.ppm_error);
if (Modes.enable_agc) rtlsdr_set_agc_mode(Modes.dev, 1);
rtlsdr_set_center_freq(Modes.dev, Modes.freq);
rtlsdr_set_sample_rate(Modes.dev, (unsigned)Modes.sample_rate);
rtlsdr_reset_buffer(Modes.dev);
fprintf(stderr, "Gain reported by device: %.2f dB\n",
rtlsdr_get_tuner_gain(Modes.dev)/10.0);
return 0;
}
int main (int argc, char **argv)
{
struct sigaction sigact;
uint32_t dev_index = 0;
int32_t device_count;
int i,r;
char vendor[256], product[256], serial[256];
uint32_t samp_rate = 2048000;
int gain = AUTO_GAIN;
dab_state dab;
if (argc > 1) {
dab.frequency = atoi(argv[1]);
} else {
//dab.frequency = 220352000;
dab.frequency = 222064000;
}
//fprintf(stderr,"%i\n",dab.frequency);
fprintf(stderr,"\n");
fprintf(stderr,"rtldab %s \n",VERSION);
fprintf(stderr,"build: %s %s\n", __DATE__,__TIME__);
fprintf(stderr,"\n");
fprintf(stderr," _____ _______ _ _____ ____ \n");
fprintf(stderr," | __ \\__ __| | | __ \\ /\\ | _ \\ \n");
fprintf(stderr," | |__) | | | | | | | | | / \\ | |_) |\n");
fprintf(stderr," | _ / | | | | | | | |/ /\\ \\ | _ < \n");
fprintf(stderr," | | \\ \\ | | | |____| |__| / ____ \\| |_) |\n");
fprintf(stderr," |_| \\_\\ |_| |______|_____/_/ \\_\\____/ \n");
fprintf(stderr,"\n");
fprintf(stderr,"\n\nrtl-dab Copyright (C) 2012 David May \n");
fprintf(stderr,"This program comes with ABSOLUTELY NO WARRANTY\n");
fprintf(stderr,"This is free software, and you are welcome to\n");
fprintf(stderr,"redistribute it under certain conditions\n\n\n");
fprintf(stderr,"--------------------------------\n");
fprintf(stderr,"Many thanks to the osmocom team!\n");
fprintf(stderr,"--------------------------------\n\n");
/*---------------------------------------------------
Looking for device and open connection
----------------------------------------------------*/
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
/*-------------------------------------------------
Set Frequency & Sample Rate
--------------------------------------------------*/
/* Set the sample rate */
r = rtlsdr_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
/* Set the frequency */
r = rtlsdr_set_center_freq(dev, dab.frequency);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set center freq.\n");
else
fprintf(stderr, "Tuned to %u Hz.\n", dab.frequency);
/*------------------------------------------------
Setting gain
-------------------------------------------------*/
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
/*-----------------------------------------------
/ Reset endpoint (mandatory)
------------------------------------------------*/
r = rtlsdr_reset_buffer(dev);
/*-----------------------------------------------
/ Signal handler
------------------------------------------------*/
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
/*-----------------------------------------------
/ start demod thread & rtl read
-----------------------------------------------*/
dab_demod_init(&dab);
dab_fic_parser_init(&sinfo);
dab_analyzer_init(&ana);
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(&dab));
rtlsdr_read_async(dev, rtlsdr_callback, (void *)(&dab),
DEFAULT_ASYNC_BUF_NUMBER, DEFAULT_BUF_LENGTH);
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
//dab_demod_close(&dab);
rtlsdr_close(dev);
return 1;
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact;
#endif
struct fm_state fm;
char *filename = NULL;
int n_read, r, opt, wb_mode = 0;
int i, gain = AUTO_GAIN; // tenths of a dB
uint8_t *buffer;
uint32_t dev_index = 0;
int device_count;
int ppm_error = 0;
char vendor[256], product[256], serial[256];
fm_init(&fm);
pthread_cond_init(&data_ready, NULL);
pthread_rwlock_init(&data_rw, NULL);
pthread_mutex_init(&data_mutex, NULL);
while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:EFA:NWMULRDCh")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
break;
case 'f':
if (fm.freq_len >= FREQUENCIES_LIMIT) {
break;}
if (strchr(optarg, ':'))
{frequency_range(&fm, optarg);}
else
{
fm.freqs[fm.freq_len] = (uint32_t)atofs(optarg);
fm.freq_len++;
}
break;
case 'g':
gain = (int)(atof(optarg) * 10);
break;
case 'l':
fm.squelch_level = (int)atof(optarg);
break;
case 's':
fm.sample_rate = (uint32_t)atofs(optarg);
break;
case 'r':
fm.output_rate = (int)atofs(optarg);
break;
case 'o':
fm.post_downsample = (int)atof(optarg);
if (fm.post_downsample < 1 || fm.post_downsample > MAXIMUM_OVERSAMPLE) {
fprintf(stderr, "Oversample must be between 1 and %i\n", MAXIMUM_OVERSAMPLE);}
break;
case 't':
fm.conseq_squelch = (int)atof(optarg);
if (fm.conseq_squelch < 0) {
fm.conseq_squelch = -fm.conseq_squelch;
fm.terminate_on_squelch = 1;
}
break;
case 'p':
ppm_error = atoi(optarg);
break;
case 'E':
fm.edge = 1;
break;
case 'F':
fm.fir_enable = 1;
break;
case 'A':
if (strcmp("std", optarg) == 0) {
fm.custom_atan = 0;}
if (strcmp("fast", optarg) == 0) {
fm.custom_atan = 1;}
if (strcmp("lut", optarg) == 0) {
atan_lut_init();
fm.custom_atan = 2;}
break;
case 'D':
fm.deemph = 1;
break;
case 'C':
fm.dc_block = 1;
break;
case 'N':
fm.mode_demod = &fm_demod;
break;
case 'W':
wb_mode = 1;
fm.mode_demod = &fm_demod;
fm.sample_rate = 170000;
fm.output_rate = 32000;
fm.custom_atan = 1;
fm.post_downsample = 4;
fm.deemph = 1;
fm.squelch_level = 0;
break;
case 'M':
fm.mode_demod = &am_demod;
break;
case 'U':
fm.mode_demod = &usb_demod;
break;
case 'L':
fm.mode_demod = &lsb_demod;
break;
case 'R':
fm.mode_demod = &raw_demod;
break;
case 'h':
default:
usage();
break;
}
}
/* quadruple sample_rate to limit to Δθ to ±π/2 */
fm.sample_rate *= fm.post_downsample;
if (fm.freq_len == 0) {
fprintf(stderr, "Please specify a frequency.\n");
exit(1);
}
if (fm.freq_len >= FREQUENCIES_LIMIT) {
fprintf(stderr, "Too many channels, maximum %i.\n", FREQUENCIES_LIMIT);
exit(1);
}
if (fm.freq_len > 1 && fm.squelch_level == 0) {
fprintf(stderr, "Please specify a squelch level. Required for scanning multiple frequencies.\n");
exit(1);
}
if (fm.freq_len > 1) {
fm.terminate_on_squelch = 0;
}
if (argc <= optind) {
filename = "-";
} else {
filename = argv[optind];
}
ACTUAL_BUF_LENGTH = lcm_post[fm.post_downsample] * DEFAULT_BUF_LENGTH;
buffer = malloc(ACTUAL_BUF_LENGTH * sizeof(uint8_t));
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
fprintf(stderr, "Found %d device(s):\n", device_count);
for (i = 0; i < device_count; i++) {
rtlsdr_get_device_usb_strings(i, vendor, product, serial);
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
}
fprintf(stderr, "\n");
fprintf(stderr, "Using device %d: %s\n",
dev_index, rtlsdr_get_device_name(dev_index));
r = rtlsdr_open(&dev, dev_index);
if (r < 0) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
/* WBFM is special */
// I really should loop over everything
// but you are more wrong for scanning broadcast FM
if (wb_mode) {
fm.freqs[0] += 16000;
}
if (fm.deemph) {
fm.deemph_a = (int)round(1.0/((1.0-exp(-1.0/(fm.output_rate * 75e-6)))));
}
optimal_settings(&fm, 0, 0);
build_fir(&fm);
/* Set the tuner gain */
if (gain == AUTO_GAIN) {
r = rtlsdr_set_tuner_gain_mode(dev, 0);
} else {
r = rtlsdr_set_tuner_gain_mode(dev, 1);
gain = nearest_gain(gain);
r = rtlsdr_set_tuner_gain(dev, gain);
}
if (r != 0) {
fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
} else if (gain == AUTO_GAIN) {
fprintf(stderr, "Tuner gain set to automatic.\n");
} else {
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
}
r = rtlsdr_set_freq_correction(dev, ppm_error);
if (strcmp(filename, "-") == 0) { /* Write samples to stdout */
fm.file = stdout;
#ifdef _WIN32
_setmode(_fileno(fm.file), _O_BINARY);
#endif
} else {
fm.file = fopen(filename, "wb");
if (!fm.file) {
fprintf(stderr, "Failed to open %s\n", filename);
exit(1);
}
}
/* Reset endpoint before we start reading from it (mandatory) */
r = rtlsdr_reset_buffer(dev);
if (r < 0) {
fprintf(stderr, "WARNING: Failed to reset buffers.\n");}
pthread_create(&demod_thread, NULL, demod_thread_fn, (void *)(&fm));
/*rtlsdr_read_async(dev, rtlsdr_callback, (void *)(&fm),
DEFAULT_ASYNC_BUF_NUMBER,
ACTUAL_BUF_LENGTH);*/
while (!do_exit) {
sync_read(buffer, ACTUAL_BUF_LENGTH, &fm);
}
while (!do_exit) {
sync_read(buffer, ACTUAL_BUF_LENGTH, &fm);
}
if (do_exit) {
fprintf(stderr, "\nUser cancel, exiting...\n");}
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
//rtlsdr_cancel_async(dev);
safe_cond_signal(&data_ready, &data_mutex);
pthread_join(demod_thread, NULL);
pthread_cond_destroy(&data_ready);
pthread_rwlock_destroy(&data_rw);
pthread_mutex_destroy(&data_mutex);
if (fm.file != stdout) {
fclose(fm.file);}
rtlsdr_close(dev);
free (buffer);
return r >= 0 ? r : -r;
}
int start_the_radio(int device_index, long freq_hz, long output_SR, int gain_db10) {
// post("inside start_the_radio()" );
// int err = 0; // tz for usage call
int r;
int dev_given = 0; // gets set on, if user passes in device index arg (-d)
// int custom_ppm = 0; // gets set on, if users specifies freq correction arg (-p)
char device_index_str[10] = "0";
// initialization
dongle_init(&dongle);
demod_init(&demod);
output_init(&output);
controller_init(&controller);
buffer_init(); // tz reset index pointers
// handle device index
if(device_index != 0) {
sprintf(device_index_str,"%d", device_index);
dongle.dev_index = verbose_device_search(device_index_str);
dev_given = 1;
}
// set gain
// tz - note that when passing this param from Max/Pd it gets passed in
// db * 10 format - so we don't need extra multiplier
// this is done to allow setting to AUTOGAIN
//
dongle.gain = gain_db10 ;
// set sample rate
demod.rate_in = (uint32_t) output_SR;
demod.rate_out = (uint32_t) output_SR;
// set frequency
controller.freqs[controller.freq_len] = (uint32_t) freq_hz;
controller.freq_len++;
// note: here is how dongle ppm error correction was set in rtl_fm
// dongle.ppm_error = atoi(optarg);
// custom_ppm = 1;
// do initial setup
// tz this was for resampling and can be removed
output.rate = demod.rate_out;
// tz this can get cleaned up too...
// set buffer length - would need to increase if downsample rate increased
//
ACTUAL_BUF_LENGTH = DEFAULT_BUF_LENGTH;
// if user specied a device number, use it - otherwise default to 0
if (!dev_given) {
dongle.dev_index = verbose_device_search("0");
}
if (dongle.dev_index < 0) {
return(1);
}
// open device
r = rtlsdr_open(&dongle.dev, (uint32_t)dongle.dev_index);
if (r < 0) {
// sprintf(errmesg, "Failed to open rtlsdr device #%d.\n", dongle.dev_index);
sprintf(errmesg, "Failed to open rtlsdr device #%d.\n", dongle.dev_index);
post(errmesg, 0);
return(1);
}
set_tuner_gain(&dongle);
// do freq error correction
verbose_ppm_set(dongle.dev, dongle.ppm_error);
//r = rtlsdr_set_testmode(dongle.dev, 1);
/* Reset endpoint before we start reading from it (mandatory) */
verbose_reset_buffer(dongle.dev);
// tz these threads all get running in parallel here
//
int errx; // for debugging - not really used now
errx = pthread_create(&controller.thread, NULL, controller_thread_fn, (void *)(&controller));
usleep(100000);
errx = pthread_create(&dongle.thread, NULL, dongle_thread_fn, (void *)(&dongle));
radio_running = 1;
return(0);
}