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/* B-Netz main
*
* (C) 2016 by Andreas Eversberg <jolly@eversberg.eu>
* All Rights Reserved
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include "../common/debug.h"
#include "../common/timer.h"
#include "../common/call.h"
#include "../common/mncc_sock.h"
#include "../common/main.h"
#include "../common/freiton.h"
#include "../common/besetztton.h"
#include "bnetz.h"
#include "dsp.h"
#include "stations.h"
#include "image.h"
#include "ansage.h"
int gfs = 2;
const char *paging = "tone";
double lossdetect = 0;
void print_help(const char *arg0)
{
print_help_common(arg0, "[-G <gfs>] ");
/* - - */
printf(" -G --gfs <gruppenfreisignal> | <lat>,<lon>\n");
printf(" Gruppenfreisignal\" 1..9 | 19 | 10..18 (default = '%d')\n", gfs);
printf(" Alternative give your coordinates of your location, to find closest\n");
printf(" base station. (e.g. '--gfs 54.487291,9.069993') Or use '--gfs list' to\n");
printf(" get a list of all base station locations.\n");
printf(" -G --gfs 19\n");
printf(" Set to 19 in order to make the phone transmit at 100 mW instead of\n");
printf(" full 15 Watts. If supported, the phone uses the channel with low power\n");
printf(" (Kanal kleiner Leistung).\n");
printf(" -P --paging tone | notone | positive | negative | <file>=<on>:<off>\n");
printf(" Send a tone, give a signal or write to a file when switching to\n");
printf(" channel 19. (paging the phone).\n");
printf(" 'tone', 'positive', 'negative' is sent on second audio channel.\n");
printf(" 'tone' sends a tone whenever channel 19 is switched.\n");
printf(" 'notone' sends a tone whenever channel 19 is NOT switched.\n");
printf(" 'positive' sends a positive signal for channel 19, else negative.\n");
printf(" 'negative' sends a negative signal for channel 19, else positive.\n");
printf(" Example: /sys/class/gpio/gpio17/value=1:0 writes a '1' to\n");
printf(" /sys/class/gpio/gpio17/value to switching to channel 19 and a '0' to\n");
printf(" switch back. (default = %s)\n", paging);
printf(" -L --loss <volume>\n");
printf(" Detect loss of carrier by detecting steady noise above given volume in\n");
printf(" percent. (disabled by default)\n");
printf("\nstation-id: Give 5 digit station-id, you don't need to enter it for every\n");
printf(" start of this program.\n");
print_hotkeys_common();
}
static int handle_options(int argc, char **argv)
{
int skip_args = 0;
char *p;
static struct option long_options_special[] = {
{"gfs", 1, 0, 'G'},
{"paging", 1, 0, 'P'},
{"loss", 1, 0, 'L'},
{0, 0, 0, 0},
};
set_options_common("G:P:L:", long_options_special);
while (1) {
int option_index = 0, c;
c = getopt_long(argc, argv, optstring, long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'G':
if (!strcasecmp(optarg, "list")) {
station_list();
exit(0);
}
if ((p = strchr(optarg, ','))) {
gfs = get_station_by_coordinates(atof(optarg), atof(p + 1));
if (gfs == 0)
exit(0);
} else
gfs = atoi(optarg);
skip_args += 2;
break;
case 'P':
paging = strdup(optarg);
skip_args += 2;
break;
case 'L':
lossdetect = atoi(optarg);
skip_args += 2;
break;
default:
opt_switch_common(c, argv[0], &skip_args);
}
}
return skip_args;
}
int main(int argc, char *argv[])
{
int rc;
int skip_args;
const char *station_id = "";
int i;
/* init common tones */
init_freiton();
init_besetzton();
init_ansage();
skip_args = handle_options(argc, argv);
argc -= skip_args;
argv += skip_args;
if (argc > 1) {
station_id = argv[1];
if (strlen(station_id) != 5) {
printf("Given station ID '%s' does not have 5 digits\n", station_id);
return 0;
}
}
if (!num_kanal) {
printf("No channel (\"Kanal\") is specified, I suggest channel 1.\n\n");
print_help(argv[-skip_args]);
return 0;
}
if (num_kanal == 1 && num_audiodev == 0)
num_audiodev = 1; /* use defualt */
if (num_kanal != num_audiodev) {
fprintf(stderr, "You need to specify as many sound devices as you have channels.\n");
exit(0);
}
if (!loopback)
print_image();
/* init functions */
rc = init_common(station_id, 5);
if (rc < 0)
goto fail;
dsp_init();
bnetz_init();
/* SDR always requires emphasis */
if (!strcmp(audiodev[0], "sdr")) {
do_pre_emphasis = 1;
do_de_emphasis = 1;
}
/* create transceiver instance */
for (i = 0; i < num_kanal; i++) {
rc = bnetz_create(kanal[i], audiodev[i], samplerate, rx_gain, gfs, do_pre_emphasis, do_de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, loopback, (double)lossdetect / 100.0, paging);
if (rc < 0) {
fprintf(stderr, "Failed to create \"Sender\" instance. Quitting!\n");
goto fail;
}
printf("Base station for channel %d ready, please tune transmitter to %.3f MHz and receiver " "to %.3f MHz.\n", kanal[i], bnetz_kanal2freq(kanal[i], 0) / 1e6, bnetz_kanal2freq(kanal[i], 1) / 1e6);
printf("To call phone, switch transmitter (using paging signal) to %.3f MHz.\n", bnetz_kanal2freq(19, 0) / 1e6);
}
main_common(&quit, latency, interval, NULL);
fail:
/* cleanup functions */
cleanup_common();
/* destroy transceiver instance */
while(sender_head)
bnetz_destroy(sender_head);
return 0;
}
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