Golay/GSC paging support
This commit is contained in:
Andreas Eversberg
302
src/golay/main.c
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302
src/golay/main.c
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/* Golay/GSC pager main
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*
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* (C) 2022 by Andreas Eversberg <jolly@eversberg.eu>
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* All Rights Reserved
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "../libsample/sample.h"
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#include "../libdebug/debug.h"
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#include "../libmobile/call.h"
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#include "../libmobile/main_mobile.h"
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#include "../liboptions/options.h"
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#include "../libfm/fm.h"
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#include "../amps/tones.h"
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#include "../amps/noanswer.h"
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#include "../amps/outoforder.h"
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#include "../amps/invalidnumber.h"
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#include "../amps/congestion.h"
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#include "golay.h"
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#define MSG_SEND "/tmp/golay_msg_send"
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#define MSG_RECEIVED "/tmp/golay_msg_received"
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static int msg_send_fd = -1;
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static int tx = 0; /* we transmit */
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static int rx = 0; /* we receive */
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static double deviation = 4500; /* WB confirmed by an email: POCSAG and GSC have same deviation of +-4.5 kHz. */
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static int deviation_given = 0;
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static double polarity = 1;
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static int polarity_given = 0;
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static const char *message = "1234";
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void print_help(const char *arg0)
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{
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main_mobile_print_help(arg0, "| -k 462.900 | -k <MHz> ");
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/* - - */
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printf(" -T --tx\n");
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printf(" Transmit GSC signal on given channel, to page a receiver. (default)\n");
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printf(" -R --rx\n");
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printf(" Receive GSC signal on given channel, so we are the receiver.\n");
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printf(" If none of the options -T nor -R is given, only transmitter is enabled.\n");
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printf(" -D --deviation wide | 4.5 | narrow | 1.0 | <other KHz>\n"); /* NB confirmed by IQ data from signal-id-wiki */
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printf(" Choose deviation of FFSK signal (default %.0f KHz).\n", deviation / 1000.0);
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printf(" -P --polarity -1 | nagative | 1 | positive\n");
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printf(" Choose polarity of FFSK signal. 'positive' means that a binary 1 uses\n");
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printf(" positive and a binary 0 negative deviation. (default %s KHz).\n", (polarity < 0) ? "negative" : "positive");
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printf(" -M --message \"...\"\n");
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printf(" Send this message, if no caller ID was given or if built-in console\n");
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printf(" is used. (default \"%s\").\n", message);
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printf("\n");
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printf("File: %s\n", MSG_SEND);
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printf(" Write \"<address>[,message]\" to it, to send a default message.\n");
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printf(" Write \"<address>,n,message\" to it, to send a numeric message.\n");
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printf(" Write \"<address>,a,message\" to it, to send an alphanumeric message.\n");
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printf("\n");
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printf("By default, an alphanumic message is sent, if last digit of the functional\n");
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printf("address is 5..8. Otherwise a tone only message is sent.\n");
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printf("\n");
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printf("A numeric message can have up to 24 digits, they are: 0123456789U-* and space\n");
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printf("Also 'shifted' digits can be sent using two digits, they are: ABCDEFGHJLNPR\n");
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printf("\n");
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printf("An aplhanumeric message can have up to 80 digits, sent upper case only.\n");
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main_mobile_print_station_id();
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main_mobile_print_hotkeys();
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}
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static void add_options(void)
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{
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main_mobile_add_options();
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option_add('T', "tx", 0);
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option_add('R', "rx", 0);
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option_add('D', "deviation", 1);
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option_add('P', "polarity", 1);
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option_add('M', "message", 1);
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}
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static int handle_options(int short_option, int argi, char **argv)
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{
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switch (short_option) {
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case 'T':
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tx = 1;
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break;
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case 'R':
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rx = 1;
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break;
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case 'D':
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if (argv[argi][0] == 'n' || argv[argi][0] == 'N')
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deviation = 1000.0;
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else if (argv[argi][0] == 'w' || argv[argi][0] == 'W')
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deviation = 4500.0;
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else
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deviation = atof(argv[argi]) * 1000.0;
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if (deviation < 1000.0) {
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fprintf(stderr, "Given deviation is too low, use higher deviation.\n");
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return -EINVAL;
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}
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if (deviation > 10000.0) {
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fprintf(stderr, "Given deviation is too high, use lower deviation.\n");
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return -EINVAL;
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}
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deviation_given = 1;
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break;
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case 'P':
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if (argv[argi][0] == 'n' || argv[argi][0] == 'N')
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polarity = -1.0;
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else if (argv[argi][0] == 'p' || argv[argi][0] == 'P')
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polarity = 1.0;
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else if (atoi(argv[argi]) == -1)
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polarity = -1.0;
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else if (atoi(argv[argi]) == 1)
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polarity = 1.0;
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else {
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fprintf(stderr, "Given polarity is not positive nor negative, use '-h' for help.\n");
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return -EINVAL;
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}
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polarity_given = 1;
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break;
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case 'M':
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message = options_strdup(argv[argi++]);
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break;
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default:
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return main_mobile_handle_options(short_option, argi, argv);
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}
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return 1;
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}
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static void myhandler(void)
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{
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static char buffer[256];
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static int pos = 0, rc, i;
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int space = sizeof(buffer) - pos;
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rc = read(msg_send_fd, buffer + pos, space);
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if (rc > 0) {
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pos += rc;
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if (pos == space) {
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fprintf(stderr, "Message buffer overflow!\n");
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pos = 0;
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}
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/* check for end of line */
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for (i = 0; i < pos; i++) {
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if (buffer[i] == '\r' || buffer[i] == '\n')
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break;
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}
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/* send msg */
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if (i < pos) {
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buffer[i] = '\0';
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pos = 0;
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if (tx)
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golay_msg_send(buffer);
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else
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PDEBUG(DGOLAY, DEBUG_ERROR, "Failed to send message, transmitter is not enabled!\n");
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}
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}
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}
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static const struct number_lengths number_lengths[] = {
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{ 7, "functional address" },
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{ 0, NULL }
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};
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int main(int argc, char *argv[])
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{
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int rc, argi;
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const char *station_id = "";
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int i;
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double frequency;
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/* GSC does not use emphasis, so disable it */
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uses_emphasis = 0;
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/* init common tones */
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init_tones();
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init_outoforder();
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init_noanswer();
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init_invalidnumber();
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init_congestion();
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/* init coding tables */
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init_golay();
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init_bch();
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/* init mobile interface */
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main_mobile_init("0123456789", number_lengths, NULL, NULL);
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/* handle options / config file */
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add_options();
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rc = options_config_file(argc, argv, "~/.osmocom/analog/golay.conf", handle_options);
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if (rc < 0)
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return 0;
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argi = options_command_line(argc, argv, handle_options);
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if (argi <= 0)
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return argi;
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if (argi < argc) {
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station_id = argv[argi];
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rc = main_mobile_number_ask(station_id, "functional address");
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if (rc)
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return rc;
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}
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if (!num_kanal) {
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printf("No channel is specified, Use '-k <MHz>' to define frequency.\n\n");
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print_help(argv[0]);
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return 0;
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}
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if (use_sdr) {
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/* set device */
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for (i = 0; i < num_kanal; i++)
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dsp_device[i] = "sdr";
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num_device = num_kanal;
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}
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if (num_kanal == 1 && num_device == 0)
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num_device = 1; /* use default */
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if (num_kanal != num_device) {
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fprintf(stderr, "You need to specify as many sound devices as you have channels.\n");
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goto fail;
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}
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/* TX is default */
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if (!tx && !rx)
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tx = 1;
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if (rx) {
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fprintf(stderr, "Sorry, but RX is not yet supported and maybe never will.\n");
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goto fail;
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}
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/* TX & RX if loopback */
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if (loopback)
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tx = rx = 1;
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/* create pipe for message sendy */
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unlink(MSG_SEND);
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rc = mkfifo(MSG_SEND, 0666);
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if (rc < 0) {
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fprintf(stderr, "Failed to create mwaaage send FIFO '%s'!\n", MSG_SEND);
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goto fail;
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} else {
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msg_send_fd = open(MSG_SEND, O_RDONLY | O_NONBLOCK);
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if (msg_send_fd < 0) {
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fprintf(stderr, "Failed to open mwaaage send FIFO! '%s'\n", MSG_SEND);
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goto fail;
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}
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}
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/* inits */
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fm_init(fast_math);
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/* create transceiver instance */
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for (i = 0; i < num_kanal; i++) {
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frequency = atof(kanal[i]) * 1e6;
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rc = golay_create(kanal[i], frequency, dsp_device[i], use_sdr, dsp_samplerate, rx_gain, tx_gain, deviation, polarity, message, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback);
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if (rc < 0) {
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fprintf(stderr, "Failed to create \"Sender\" instance. Quitting!\n");
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goto fail;
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}
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printf("Base station ready, please tune transmitter (or receiver) to %.4f MHz\n", frequency / 1e6);
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}
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main_mobile_loop("golay", &quit, myhandler, station_id);
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fail:
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/* pipe */
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if (msg_send_fd > 0)
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close(msg_send_fd);
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unlink(MSG_SEND);
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/* destroy transceiver instance */
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while(sender_head)
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golay_destroy(sender_head);
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/* exits */
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fm_exit();
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options_free();
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return 0;
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}
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