mirror of https://github.com/PentHertz/srsLTE.git
210 lines
5.4 KiB
C
210 lines
5.4 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The srsLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE 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 Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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#include <math.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "srslte/srslte.h"
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#include "srslte/cuhd/cuhd_utils.h"
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#ifndef DISABLE_UHD
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#include "srslte/cuhd/cuhd.h"
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#endif
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#define MHZ 1000000
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#define SAMP_FREQ 1920000
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#define FLEN 9600
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#define FLEN_PERIOD 0.005
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#define MAX_EARFCN 1000
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int band = -1;
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int earfcn_start=-1, earfcn_end = -1;
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cell_search_cfg_t config = {100, 10, 10.0, 50};
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float uhd_gain = 60.0;
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char *uhd_args="";
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void usage(char *prog) {
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printf("Usage: %s [agsendtvb] -b band\n", prog);
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printf("\t-a UHD args [Default %s]\n", uhd_args);
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printf("\t-g UHD gain [Default %.2f dB]\n", uhd_gain);
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printf("\t-s earfcn_start [Default All]\n");
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printf("\t-e earfcn_end [Default All]\n");
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printf("\t-n nof_frames_total [Default 100]\n");
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printf("\t-t threshold [Default %.2f]\n",config.threshold);
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printf("\t-v [set srslte_verbose to debug, default none]\n");
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}
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void parse_args(int argc, char **argv) {
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int opt;
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while ((opt = getopt(argc, argv, "agsendtvb")) != -1) {
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switch(opt) {
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case 'a':
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uhd_args = argv[optind];
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break;
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case 'b':
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band = atoi(argv[optind]);
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break;
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case 's':
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earfcn_start = atoi(argv[optind]);
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break;
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case 'e':
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earfcn_end = atoi(argv[optind]);
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break;
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case 'n':
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config.max_frames_pss = atoi(argv[optind]);
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break;
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case 't':
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config.threshold = atof(argv[optind]);
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break;
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case 'g':
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uhd_gain = atof(argv[optind]);
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break;
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case 'v':
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srslte_verbose++;
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break;
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default:
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usage(argv[0]);
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exit(-1);
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}
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}
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if (band == -1) {
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usage(argv[0]);
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exit(-1);
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}
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}
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int cuhd_recv_wrapper(void *h, void *data, uint32_t nsamples, srslte_timestamp_t *t) {
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DEBUG(" ---- Receive %d samples ---- \n", nsamples);
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return cuhd_recv(h, data, nsamples, 1);
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}
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int main(int argc, char **argv) {
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int n;
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void *uhd;
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srslte_ue_cellsearch_t cs;
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srslte_ue_cellsearch_result_t found_cells[3];
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int nof_freqs;
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srslte_earfcn_t channels[MAX_EARFCN];
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uint32_t freq;
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parse_args(argc, argv);
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printf("Opening UHD device...\n");
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if (cuhd_open(uhd_args, &uhd)) {
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fprintf(stderr, "Error opening uhd\n");
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exit(-1);
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}
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cuhd_set_rx_gain(uhd, uhd_gain);
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nof_freqs = srslte_band_get_fd_band(band, channels, earfcn_start, earfcn_end, MAX_EARFCN);
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if (nof_freqs < 0) {
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fprintf(stderr, "Error getting EARFCN list\n");
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exit(-1);
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}
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for (freq=0;freq<nof_freqs;freq++) {
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/* set uhd_freq */
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cuhd_set_rx_freq(uhd, (double) channels[freq].fd * MHZ);
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cuhd_rx_wait_lo_locked(uhd);
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INFO("Set uhd_freq to %.3f MHz\n", (double) channels[freq].fd * MHZ/1000000);
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printf("[%3d/%d]: EARFCN %d Freq. %.2f MHz looking for PSS. \n", freq, nof_freqs,
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channels[freq].id, channels[freq].fd);
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if (SRSLTE_VERBOSE_ISINFO()) {
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printf("\n");
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}
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bzero(found_cells, 3*sizeof(srslte_ue_cellsearch_result_t));
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if (srslte_ue_cellsearch_init(&cs, cuhd_recv_wrapper, uhd)) {
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fprintf(stderr, "Error initiating UE cell detect\n");
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exit(-1);
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}
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if (config.max_frames_pss) {
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srslte_ue_cellsearch_set_nof_frames_to_scan(&cs, config.max_frames_pss);
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}
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if (config.threshold) {
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srslte_ue_cellsearch_set_threshold(&cs, config.threshold);
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}
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if (config.init_agc) {
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srslte_ue_sync_start_agc(&cs.ue_sync, cuhd_set_rx_gain, config.init_agc);
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}
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INFO("Setting sampling frequency %.2f MHz for PSS search\n", SRSLTE_CS_SAMP_FREQ/1000);
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cuhd_set_rx_srate(uhd, SRSLTE_CS_SAMP_FREQ);
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INFO("Starting receiver...\n", 0);
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cuhd_start_rx_stream(uhd);
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n = srslte_ue_cellsearch_scan(&cs, found_cells, NULL);
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if (n < 0) {
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fprintf(stderr, "Error searching cell\n");
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exit(-1);
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} else if (n == 1) {
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for (int i=0;i<3;i++) {
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if (found_cells[i].peak > config.threshold/2) {
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srslte_cell_t cell;
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cell.id = found_cells[i].cell_id;
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cell.cp = found_cells[i].cp;
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int ret = cuhd_mib_decoder(uhd, &config, &cell);
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if (ret < 0) {
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fprintf(stderr, "Error decoding MIB\n");
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exit(-1);
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}
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if (ret == SRSLTE_UE_MIB_FOUND) {
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printf("Found CELL ID %d. %d PRB, %d ports\n",
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cell.id, cell.nof_prb, cell.nof_ports);
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}
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}
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}
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}
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}
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printf("\nBye\n");
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cuhd_close(uhd);
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exit(0);
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}
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