mirror of https://github.com/pvnis/srsRAN_4G.git
Adds PUB/SUB model to ZMQ and option to use sc16 sample type over the socket (#815)
* Adds PUB/SUB model to ZMQ and option to use sc16 sample type over the socket. Adds example application for remote RX RF head using ZMQ * Addressed comments and other bugs * Removed atoi atofmaster
Ismael Gomez
5 years ago
committed by
GitHub
parent
be60b78ceb
commit
f7e6da050e
@ -0,0 +1,259 @@
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/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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 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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* 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 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 <stdio.h>
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#include <signal.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 <time.h>
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#include <zmq.h>
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#include <stdbool.h>
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#include "srslte/srslte.h"
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#include "srslte/phy/rf/rf.h"
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static bool keep_running = true;
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static uint32_t nof_rx_antennas = 1;
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static const uint32_t max_rx_antennas = 1;
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static void int_handler(int dummy);
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static void usage(char *prog);
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static void parse_args(int argc, char **argv);
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static int init_radio(uint32_t *buf_len);
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static int rx_radio(void **buffer, uint32_t buff_len);
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static void close_radio();
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/* Example function to initialize ZMQ socket */
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static void *zmq_ctx = NULL;
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static void *zmq_sock = NULL;
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static const char *zmq_args = "tcp://*:5550";
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static int init_zmq()
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{
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zmq_ctx = zmq_ctx_new();
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// Create socket
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zmq_sock = zmq_socket(zmq_ctx, ZMQ_PUB);
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if (!zmq_sock) {
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fprintf(stderr, "Error: creating transmitter socket\n");
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return -1;
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}
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// The transmitter starts first and creates the socket
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if (zmq_bind(zmq_sock, zmq_args)) {
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fprintf(stderr, "Error: connecting transmitter socket: %s\n", zmq_strerror(zmq_errno()));
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return -1;
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}
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return 0;
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}
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/* Example function to write samples to ZMQ socket */
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static int tx_zmq(void **buffer, uint32_t buffer_len)
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{
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// wait for request
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uint8_t dummy;
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zmq_recv(zmq_sock, &dummy, sizeof(dummy), 0);
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return zmq_send(zmq_sock, buffer[0], buffer_len, 0);
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}
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int main(int argc, char **argv) {
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void *buffer[max_rx_antennas];
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int n = 0;
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uint32_t buflen = 0; // in samples
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uint32_t sample_size = 8;
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// Sets signal handlers
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signal(SIGINT, int_handler);
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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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// Parse args
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parse_args(argc, argv);
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// Initializes ZMQ
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if (init_zmq()) {
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ERROR("Initializing ZMQ\n");
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exit(-1);
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}
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if (init_radio(&buflen)) {
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ERROR("Initializing Radio\n");
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exit(-1);
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}
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// Initializes memory for input buffer
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bzero(buffer, sizeof(void*)*max_rx_antennas);
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for (int i = 0; i < nof_rx_antennas; i++) {
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buffer[i] = malloc(buflen*sizeof(cf_t));
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if (!buffer[i]) {
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perror("malloc");
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exit(-1);
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}
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}
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printf("Streaming samples...\n");
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uint32_t print_cnt = 0;
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while(keep_running) {
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n = rx_radio(buffer, buflen);
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if (n < 0) {
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ERROR("Error receiving samples\n");
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exit(-1);
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}
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if (srslte_verbose == SRSLTE_VERBOSE_INFO) {
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printf("Received %d samples from radio\n", n);
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}
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n = tx_zmq((void**) buffer, n*sample_size);
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if (n == -1) {
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print_cnt++;
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if (print_cnt == 1000) {
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printf("ZMQ socket not connected\n");
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print_cnt = 0;
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}
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} else {
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if (srslte_verbose == SRSLTE_VERBOSE_INFO) {
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printf("Transmitted %d bytes to ZMQ\n", n);
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}
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}
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}
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// Cleanup memory and close RF device
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for (int i = 0; i < nof_rx_antennas; i++) {
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if (buffer[i]) {
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free(buffer[i]);
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}
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}
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close_radio();
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printf("Exit Ok\n");
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exit(0);
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}
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/* Example function to initialize the Radio frontend. In this case, we use srsLTE RF API to open a device,
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* which automatically picks UHD, bladeRF, limeSDR, etc.
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*/
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static srslte_rf_t rf = {};
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static char *rf_args = "fastpath";
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static float rf_gain = 40.0, rf_freq = -1.0, rf_rate = 11.52e6;
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static uint32_t rf_recv_frame_size_ms = 1;
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static int init_radio(uint32_t *buffer_len)
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{
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// Uses srsLTE RF API to open a device, could use other code here
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printf("Opening RF device...\n");
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if (srslte_rf_open_multi(&rf, rf_args, nof_rx_antennas)) {
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ERROR("Error opening rf\n");
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return -1;
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}
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printf("Set RX freq: %.2f MHz\n", srslte_rf_set_rx_freq(&rf, nof_rx_antennas, rf_freq) / 1000000);
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printf("Set RX gain: %.2f dB\n", srslte_rf_set_rx_gain(&rf, rf_gain));
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float srate = srslte_rf_set_rx_srate(&rf, rf_rate);
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if (srate != rf_rate) {
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ERROR("Error setting samplign frequency %.2f MHz\n", rf_rate * 1e-6);
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return -1;
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}
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if (buffer_len) {
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*buffer_len = srate*rf_recv_frame_size_ms*1e-3;
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}
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printf("Set RX rate: %.2f MHz\n", srate*1e-6);
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srslte_rf_start_rx_stream(&rf, false);
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return 0;
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}
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/* Example implementation to receive from Radio frontend. In this case we use srsLTE
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*/
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static int rx_radio(void **buffer, uint32_t buf_len)
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{
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return srslte_rf_recv_with_time_multi(&rf, buffer, buf_len, true, NULL, NULL);
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}
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static void close_radio()
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{
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srslte_rf_close(&rf);
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}
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static void int_handler(int dummy) {
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keep_running = false;
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}
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static void usage(char *prog) {
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printf("Usage: %s [agrAzv] -f rx_frequency_hz\n", prog);
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printf("\t-a RF args [Default %s]\n", rf_args);
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printf("\t-g RF Gain [Default %.2f dB]\n", rf_gain);
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printf("\t-r RF Rate [Default %.6f Hz]\n", rf_rate);
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printf("\t-m RF receive frame size in ms [Default %d ms]\n", rf_recv_frame_size_ms);
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printf("\t-A Number of antennas [Max %d, Default %d]\n", max_rx_antennas, nof_rx_antennas);
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printf("\t-z ZMQ args [Default %s]\n", zmq_args);
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printf("\t-v srslte_verbose\n");
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}
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static void parse_args(int argc, char **argv) {
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int opt;
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while ((opt = getopt(argc, argv, "agrfvmzA")) != -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 'g':
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rf_gain = strtof(argv[optind], NULL);
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break;
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case 'm':
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rf_recv_frame_size_ms = strtol(argv[optind], NULL);
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break;
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case 'r':
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rf_rate = strtof(argv[optind], NULL);
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break;
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case 'f':
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rf_freq = strtof(argv[optind], NULL);
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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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case 'z':
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zmq_args = argv[optind];
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break;
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case 'A':
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nof_rx_antennas = strtol(argv[optind], NULL);
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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 (nof_rx_antennas > max_rx_antennas || nof_rx_antennas < 1) {
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fprintf(stderr, "Invalid number of antennas\n");
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usage(argv[0]);
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exit(-1);
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}
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if (rf_freq < 0) {
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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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