| /*! \file osmo-arfcn.c |
| * Utility program for ARFCN / frequency calculations. */ |
| /* |
| * (C) 2011 by Harald Welte <laforge@gnumonks.org> |
| * |
| * 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 2 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, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <getopt.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| |
| #include <osmocom/gsm/gsm_utils.h> |
| |
| enum program_mode { |
| MODE_NONE, |
| MODE_A2F, |
| MODE_F2A, |
| }; |
| |
| static int arfcn2freq(int arfcn) |
| { |
| uint16_t freq10u, freq10d; |
| |
| if (arfcn < 0 || arfcn > 0xffff) { |
| fprintf(stderr, "Invalid ARFCN %d\n", arfcn); |
| return -EINVAL; |
| } |
| |
| freq10u = gsm_arfcn2freq10(arfcn, 1); |
| freq10d = gsm_arfcn2freq10(arfcn, 0); |
| if (freq10u == 0xffff || freq10d == 0xffff) { |
| fprintf(stderr, "Error during conversion of ARFCN %d\n", |
| arfcn); |
| return -EINVAL; |
| } |
| |
| printf("ARFCN %4d: Uplink %4u.%1u MHz / Downlink %4u.%1u MHz\n", |
| arfcn & ~ARFCN_FLAG_MASK, |
| freq10u/10, freq10u%10, freq10d/10, freq10d%10); |
| |
| return 0; |
| } |
| |
| static int freq2arfcn(int freq10, int uplink) |
| { |
| uint16_t arfcn; |
| enum gsm_band band; |
| |
| if (uplink != 0 && uplink != 1) { |
| fprintf(stderr, "Need to specify uplink or downlink\n"); |
| return -EINVAL; |
| } |
| |
| arfcn = gsm_freq102arfcn(freq10, uplink); |
| |
| if (arfcn == 0xffff) { |
| fprintf(stderr, "Unable to find matching ARFCN\n"); |
| return -EINVAL; |
| } |
| |
| if (gsm_arfcn2band_rc(arfcn, &band) < 0) { |
| fprintf(stderr, "ARFCN contains no valid band\n"); |
| return -EINVAL; |
| } |
| |
| printf("%s: ARFCN %4d\n", |
| gsm_band_name(band), |
| arfcn & ~ARFCN_FLAG_MASK); |
| return 0; |
| } |
| |
| static void help(const char *progname) |
| { |
| printf("Usage: %s [-h] [-p] [-a arfcn] [-f freq] [-u|-d]\n", |
| progname); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int arfcn, freq, pcs = 0, uplink = -1; |
| int opt; |
| char *param; |
| enum program_mode mode = MODE_NONE; |
| |
| while ((opt = getopt(argc, argv, "pa:f:udh")) != -1) { |
| switch (opt) { |
| case 'p': |
| pcs = 1; |
| break; |
| case 'a': |
| mode = MODE_A2F; |
| param = optarg; |
| break; |
| case 'f': |
| mode = MODE_F2A; |
| param = optarg; |
| break; |
| case 'u': |
| uplink = 1; |
| break; |
| case 'd': |
| uplink = 0; |
| break; |
| case 'h': |
| help(argv[0]); |
| exit(0); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (argc > optind) { |
| fprintf(stderr, "Unsupported positional arguments in command line\n"); |
| exit(2); |
| } |
| |
| switch (mode) { |
| case MODE_NONE: |
| help(argv[0]); |
| exit(2); |
| break; |
| case MODE_A2F: |
| arfcn = atoi(param); |
| if (pcs) |
| arfcn |= ARFCN_PCS; |
| arfcn2freq(arfcn); |
| break; |
| case MODE_F2A: |
| freq = (int)(atof(param) * 10.0f); |
| freq2arfcn(freq, uplink); |
| break; |
| } |
| |
| exit(0); |
| } |