mirror of https://github.com/PentHertz/srsLTE.git
288 lines
8.5 KiB
C
288 lines
8.5 KiB
C
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* srsRAN 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero 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 <math.h>
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#include <signal.h>
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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 <sys/time.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "srsran/srsran.h"
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#include "srsran/common/crash_handler.h"
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#include "srsran/phy/rf/rf_utils.h"
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#ifndef DISABLE_RF
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#include "srsran/phy/rf/rf.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 cell_detect_config = {.max_frames_pbch = SRSRAN_DEFAULT_MAX_FRAMES_PBCH,
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.max_frames_pss = SRSRAN_DEFAULT_MAX_FRAMES_PSS,
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.nof_valid_pss_frames = SRSRAN_DEFAULT_NOF_VALID_PSS_FRAMES,
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.init_agc = 0,
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.force_tdd = false};
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struct cells {
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srsran_cell_t cell;
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float freq;
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int dl_earfcn;
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float power;
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};
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struct cells results[1024];
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float rf_gain = 70.0;
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char* rf_args = "";
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char* rf_dev = "";
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void usage(char* prog)
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{
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printf("Usage: %s [agsendtvb] -b band\n", prog);
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printf("\t-a RF args [Default %s]\n", rf_args);
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printf("\t-d RF devicename [Default %s]\n", rf_dev);
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printf("\t-g RF gain [Default %.2f dB]\n", rf_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-v [set srsran_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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{
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int opt;
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while ((opt = getopt(argc, argv, "agsendvb")) != -1) {
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switch (opt) {
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case 'a':
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rf_args = argv[optind];
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break;
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case 'b':
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band = (int)strtol(argv[optind], NULL, 10);
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break;
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case 'd':
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rf_dev = argv[optind];
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break;
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case 's':
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earfcn_start = (int)strtol(argv[optind], NULL, 10);
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break;
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case 'e':
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earfcn_end = (int)strtol(argv[optind], NULL, 10);
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break;
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case 'n':
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cell_detect_config.max_frames_pss = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'g':
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rf_gain = strtof(argv[optind], NULL);
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break;
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case 'v':
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increase_srsran_verbose_level();
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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 srsran_rf_recv_wrapper(void* h, void* data, uint32_t nsamples, srsran_timestamp_t* t)
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{
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DEBUG(" ---- Receive %d samples ---- ", nsamples);
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return srsran_rf_recv_with_time((srsran_rf_t*)h, data, nsamples, 1, NULL, NULL);
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}
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bool go_exit = false;
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void sig_int_handler(int signo)
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{
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printf("SIGINT received. Exiting...\n");
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if (signo == SIGINT) {
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go_exit = true;
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}
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}
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static SRSRAN_AGC_CALLBACK(srsran_rf_set_rx_gain_wrapper)
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{
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srsran_rf_set_rx_gain((srsran_rf_t*)h, gain_db);
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}
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int main(int argc, char** argv)
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{
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int n;
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srsran_rf_t rf;
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srsran_ue_cellsearch_t cs;
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srsran_ue_cellsearch_result_t found_cells[3];
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int nof_freqs;
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srsran_earfcn_t channels[MAX_EARFCN];
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uint32_t freq;
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uint32_t n_found_cells = 0;
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char fifo_file[] = "celllog.fifo";
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struct stat sbuf;
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int cellog_fifo;
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char logstr[128];
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if(stat(fifo_file, &sbuf) != 0) {
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mkfifo(fifo_file, 0666);
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}
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srsran_debug_handle_crash(argc, argv);
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parse_args(argc, argv);
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printf("Opening RF device...\n");
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if (srsran_rf_open_devname(&rf, rf_dev, rf_args, 1)) {
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ERROR("Error opening rf");
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exit(-1);
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}
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if (!cell_detect_config.init_agc) {
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srsran_rf_set_rx_gain(&rf, rf_gain);
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} else {
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printf("Starting AGC thread...\n");
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if (srsran_rf_start_gain_thread(&rf, false)) {
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ERROR("Error opening rf");
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exit(-1);
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}
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srsran_rf_set_rx_gain(&rf, 50);
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}
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// Supress RF messages
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srsran_rf_suppress_stdout(&rf);
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nof_freqs = srsran_band_get_fd_band(band, channels, earfcn_start, earfcn_end, MAX_EARFCN);
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if (nof_freqs < 0) {
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ERROR("Error getting EARFCN list");
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exit(-1);
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}
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sigset_t sigset;
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sigemptyset(&sigset);
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sigaddset(&sigset, SIGINT);
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sigprocmask(SIG_UNBLOCK, &sigset, NULL);
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signal(SIGINT, sig_int_handler);
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if (srsran_ue_cellsearch_init(&cs, cell_detect_config.max_frames_pss, srsran_rf_recv_wrapper, (void*)&rf)) {
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ERROR("Error initiating UE cell detect");
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exit(-1);
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}
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if (cell_detect_config.max_frames_pss) {
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srsran_ue_cellsearch_set_nof_valid_frames(&cs, cell_detect_config.nof_valid_pss_frames);
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}
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if (cell_detect_config.init_agc) {
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srsran_rf_info_t* rf_info = srsran_rf_get_info(&rf);
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srsran_ue_sync_start_agc(&cs.ue_sync,
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srsran_rf_set_rx_gain_wrapper,
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rf_info->min_rx_gain,
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rf_info->max_rx_gain,
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cell_detect_config.init_agc);
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}
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for (freq = 0; freq < nof_freqs && !go_exit; freq++) {
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/* set rf_freq */
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srsran_rf_set_rx_freq(&rf, 0, (double)channels[freq].fd * MHZ);
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INFO("Set rf_freq to %.3f MHz", (double)channels[freq].fd * MHZ / 1000000);
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printf(
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"[%3d/%d]: EARFCN %d Freq. %.2f MHz looking for PSS.\n", freq, nof_freqs, channels[freq].id, channels[freq].fd);
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fflush(stdout);
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if (SRSRAN_VERBOSE_ISINFO()) {
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printf("\n");
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}
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bzero(found_cells, 3 * sizeof(srsran_ue_cellsearch_result_t));
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INFO("Setting sampling frequency %.2f MHz for PSS search", SRSRAN_CS_SAMP_FREQ / 1000000);
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srsran_rf_set_rx_srate(&rf, SRSRAN_CS_SAMP_FREQ);
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INFO("Starting receiver...");
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srsran_rf_start_rx_stream(&rf, false);
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n = srsran_ue_cellsearch_scan(&cs, found_cells, NULL);
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if (n < 0) {
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ERROR("Error searching cell");
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exit(-1);
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} else if (n > 0) {
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for (int i = 0; i < 3; i++) {
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if (found_cells[i].psr > 2.0) {
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srsran_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 = rf_mib_decoder(&rf, 1, &cell_detect_config, &cell, NULL);
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if (ret < 0) {
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ERROR("Error decoding MIB");
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exit(-1);
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}
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if (ret == SRSRAN_UE_MIB_FOUND) {
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cellog_fifo = open(fifo_file, O_WRONLY);
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printf("Found CELL ID %d. %d PRB, %d ports\n", cell.id, cell.nof_prb, cell.nof_ports);
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sprintf(logstr, "[CellInfo]:CID=%d;DL_EARFCN=%d;FREQ=%.1f MHz;BAND=%d;POWER=%.1f dBm\n", cell.id, channels[freq].id, channels[freq].fd, band, srsran_convert_power_to_dB(found_cells[i].peak));
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write(cellog_fifo, logstr, strlen(logstr)+1);
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close(cellog_fifo);
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if (cell.nof_ports > 0) {
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results[n_found_cells].cell = cell;
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results[n_found_cells].freq = channels[freq].fd;
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results[n_found_cells].dl_earfcn = channels[freq].id;
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results[n_found_cells].power = found_cells[i].peak;
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n_found_cells++;
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}
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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("\n\nFound %d cells\n", n_found_cells);
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for (int i = 0; i < n_found_cells; i++) {
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printf("Found CELL %.1f MHz, EARFCN=%d, PHYID=%d, %d PRB, %d ports, PSS power=%.1f dBm\n",
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results[i].freq,
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results[i].dl_earfcn,
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results[i].cell.id,
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results[i].cell.nof_prb,
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results[i].cell.nof_ports,
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srsran_convert_power_to_dB(results[i].power));
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}
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printf("\nBye\n");
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srsran_ue_cellsearch_free(&cs);
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srsran_rf_close(&rf);
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exit(0);
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}
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