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usrp_lib.cpp 47.52 KiB
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/** usrp_lib.cpp
*
* \author: HongliangXU : hong-liang-xu@agilent.com
*/
#define _LARGEFILE_SOURCE
#define _FILE_OFFSET_BITS 64
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <uhd/version.hpp>
#if UHD_VERSION < 3110000
#include <uhd/utils/thread_priority.hpp>
#else
#include <uhd/utils/thread.hpp>
#endif
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/version.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/thread.hpp>
#include <boost/format.hpp>
#include <iostream>
#include <complex>
#include <fstream>
#include <cmath>
#include <time.h>
#include "common/utils/LOG/log.h"
#include "common_lib.h"
#include "assertions.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include <sys/resource.h>
#ifdef __SSE4_1__
#include <smmintrin.h>
#endif
#ifdef __AVX2__
#include <immintrin.h>
#endif
#ifdef __arm__
#include <arm_neon.h>
#endif
/** @addtogroup _USRP_PHY_RF_INTERFACE_
* @{ */
int gpio789=0;
extern int usrp_tx_thread;
typedef struct {
// --------------------------------
// variables for USRP configuration
// --------------------------------
//! USRP device pointer
uhd::usrp::multi_usrp::sptr usrp;
//create a send streamer and a receive streamer
//! USRP TX Stream
uhd::tx_streamer::sptr tx_stream;
//! USRP RX Stream
uhd::rx_streamer::sptr rx_stream;
//! USRP TX Metadata
uhd::tx_metadata_t tx_md;
//! USRP RX Metadata
uhd::rx_metadata_t rx_md;
//! Sampling rate
double sample_rate;
//! TX forward samples. We use usrp_time_offset to get this value
int tx_forward_nsamps; //166 for 20Mhz
// --------------------------------
// Debug and output control
// --------------------------------
int num_underflows;
int num_overflows;
int num_seq_errors;
int64_t tx_count;
int64_t rx_count;
int wait_for_first_pps;
int use_gps;
//int first_tx;
//int first_rx;
//! timestamp of RX packet
openair0_timestamp rx_timestamp;
} usrp_state_t;
//void print_notes(void)
//{
// Helpful notes
// std::cout << boost::format("**************************************Helpful Notes on Clock/PPS Selection**************************************\n");
// std::cout << boost::format("As you can see, the default 10 MHz Reference and 1 PPS signals are now from the GPSDO.\n");
// std::cout << boost::format("If you would like to use the internal reference(TCXO) in other applications, you must configure that explicitly.\n");
// std::cout << boost::format("You can no longer select the external SMAs for 10 MHz or 1 PPS signaling.\n");
// std::cout << boost::format("****************************************************************************************************************\n");
//}
int check_ref_locked(usrp_state_t *s,size_t mboard) {
std::vector<std::string> sensor_names = s->usrp->get_mboard_sensor_names(mboard);
bool ref_locked = false;
if(std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end()) {
std::cout << "Waiting for reference lock..." << std::flush;
for (int i = 0; i < 30 and not ref_locked; i++) {
ref_locked = s->usrp->get_mboard_sensor("ref_locked", mboard).to_bool();
if (not ref_locked) {
std::cout << "." << std::flush;
boost::this_thread::sleep(boost::posix_time::seconds(1));
} }
if(ref_locked) {
std::cout << "LOCKED" << std::endl;
} else {
std::cout << "FAILED" << std::endl;
}
} else {
std::cout << boost::format("ref_locked sensor not present on this board.\n");
}
return ref_locked;
}
static int sync_to_gps(openair0_device *device) {
uhd::set_thread_priority_safe();
//std::string args;
//Set up program options
//po::options_description desc("Allowed options");
//desc.add_options()
//("help", "help message")
//("args", po::value<std::string>(&args)->default_value(""), "USRP device arguments")
//;
//po::variables_map vm;
//po::store(po::parse_command_line(argc, argv, desc), vm);
//po::notify(vm);
//Print the help message
//if (vm.count("help"))
//{
// std::cout << boost::format("Synchronize USRP to GPS %s") % desc << std::endl;
// return EXIT_FAILURE;
//}
//Create a USRP device
//std::cout << boost::format("\nCreating the USRP device with: %s...\n") % args;
//uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
//std::cout << boost::format("Using Device: %s\n") % usrp->get_pp_string();
usrp_state_t *s = (usrp_state_t *)device->priv;
try {
size_t num_mboards = s->usrp->get_num_mboards();
size_t num_gps_locked = 0;
for (size_t mboard = 0; mboard < num_mboards; mboard++) {
std::cout << "Synchronizing mboard " << mboard << ": " << s->usrp->get_mboard_name(mboard) << std::endl;
bool ref_locked = check_ref_locked(s,mboard);
if (ref_locked) {
std::cout << boost::format("Ref Locked\n");
} else {
std::cout << "Failed to lock to GPSDO 10 MHz Reference. Exiting." << std::endl;
exit(EXIT_FAILURE);
}
//Wait for GPS lock
bool gps_locked = s->usrp->get_mboard_sensor("gps_locked", mboard).to_bool();
if(gps_locked) {
num_gps_locked++;
std::cout << boost::format("GPS Locked\n");
} else {
LOG_W(HW,"WARNING: GPS not locked - time will not be accurate until locked\n");
}
//Set to GPS time
uhd::time_spec_t gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int()));
//s->usrp->set_time_next_pps(gps_time+1.0, mboard);
s->usrp->set_time_next_pps(uhd::time_spec_t(0.0));
//Wait for it to apply
//The wait is 2 seconds because N-Series has a known issue where
//the time at the last PPS does not properly update at the PPS edge //when the time is actually set.
boost::this_thread::sleep(boost::posix_time::seconds(2));
//Check times
gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int()));
uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps(mboard);
std::cout << "USRP time: " << (boost::format("%0.9f") % time_last_pps.get_real_secs()) << std::endl;
std::cout << "GPSDO time: " << (boost::format("%0.9f") % gps_time.get_real_secs()) << std::endl;
//if (gps_time.get_real_secs() == time_last_pps.get_real_secs())
// std::cout << std::endl << "SUCCESS: USRP time synchronized to GPS time" << std::endl << std::endl;
//else
// std::cerr << std::endl << "ERROR: Failed to synchronize USRP time to GPS time" << std::endl << std::endl;
}
if (num_gps_locked == num_mboards and num_mboards > 1) {
//Check to see if all USRP times are aligned
//First, wait for PPS.
uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps();
while (time_last_pps == s->usrp->get_time_last_pps()) {
boost::this_thread::sleep(boost::posix_time::milliseconds(1));
}
//Sleep a little to make sure all devices have seen a PPS edge
boost::this_thread::sleep(boost::posix_time::milliseconds(200));
//Compare times across all mboards
bool all_matched = true;
uhd::time_spec_t mboard0_time = s->usrp->get_time_last_pps(0);
for (size_t mboard = 1; mboard < num_mboards; mboard++) {
uhd::time_spec_t mboard_time = s->usrp->get_time_last_pps(mboard);
if (mboard_time != mboard0_time) {
all_matched = false;
std::cerr << (boost::format("ERROR: Times are not aligned: USRP 0=%0.9f, USRP %d=%0.9f")
% mboard0_time.get_real_secs()
% mboard
% mboard_time.get_real_secs()) << std::endl;
}
}
if (all_matched) {
std::cout << "SUCCESS: USRP times aligned" << std::endl << std::endl;
} else {
std::cout << "ERROR: USRP times are not aligned" << std::endl << std::endl;
}
}
} catch (std::exception &e) {
std::cout << boost::format("\nError: %s") % e.what();
std::cout << boost::format("This could mean that you have not installed the GPSDO correctly.\n\n");
std::cout << boost::format("Visit one of these pages if the problem persists:\n");
std::cout << boost::format(" * N2X0/E1X0: http://files.ettus.com/manual/page_gpsdo.html");
std::cout << boost::format(" * X3X0: http://files.ettus.com/manual/page_gpsdo_x3x0.html\n\n");
std::cout << boost::format(" * E3X0: http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_gps\n\n");
exit(EXIT_FAILURE);
}
return EXIT_SUCCESS;
}
/*! \brief Called to start the USRP transceiver. Return 0 if OK, < 0 if error
@param device pointer to the device structure specific to the RF hardware target
*/
static int trx_usrp_start(openair0_device *device) {
usrp_state_t *s = (usrp_state_t *)device->priv;
// setup GPIO for TDD, GPIO(4) = ATR_RX
//set data direction register (DDR) to output
s->usrp->set_gpio_attr("FP0", "DDR", 0xfff, 0xfff);
//set lower 7 bits to be controlled automatically by ATR (the rest 5 bits are controlled manually)
s->usrp->set_gpio_attr("FP0", "CTRL", 0x7f,0xfff); //set pins 4 (RX_TX_Switch) and 6 (Shutdown PA) to 1 when the radio is only receiving (ATR_RX)
s->usrp->set_gpio_attr("FP0", "ATR_RX", (1<<4)|(1<<6), 0x7f);
// set pin 5 (Shutdown LNA) to 1 when the radio is transmitting and receiveing (ATR_XX)
// (we use full duplex here, because our RX is on all the time - this might need to change later)
s->usrp->set_gpio_attr("FP0", "ATR_XX", (1<<5), 0x7f);
// set the output pins to 1
s->usrp->set_gpio_attr("FP0", "OUT", 7<<7, 0xf80);
s->wait_for_first_pps = 1;
s->rx_count = 0;
s->tx_count = 0;
//s->first_tx = 1;
//s->first_rx = 1;
s->rx_timestamp = 0;
s->usrp->set_time_next_pps(uhd::time_spec_t(0.0));
// wait for the pps to change
uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps();
while (time_last_pps == s->usrp->get_time_last_pps()) {
boost::this_thread::sleep(boost::posix_time::milliseconds(1));
}
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = uhd::time_spec_t(1.0);
cmd.stream_now = false; // start at constant delay
s->rx_stream->issue_stream_cmd(cmd);
return 0;
}
/*! \brief Terminate operation of the USRP transceiver -- free all associated resources
* \param device the hardware to use
*/
static void trx_usrp_end(openair0_device *device) {
if (device == NULL)
return;
usrp_state_t *s = (usrp_state_t *)device->priv;
if (s == NULL)
return;
iqrecorder_end(device);
}
/*! \brief Called to send samples to the USRP RF target
@param device pointer to the device structure specific to the RF hardware target
@param timestamp The timestamp at which the first sample MUST be sent
@param buff Buffer which holds the samples
@param nsamps number of samples to be sent
@param antenna_id index of the antenna if the device has multiple antennas
@param flags flags must be set to TRUE if timestamp parameter needs to be applied
*/
static int trx_usrp_write(openair0_device *device,
openair0_timestamp timestamp,
void **buff,
int nsamps,
int cc,
int flags) {
int ret=0;
usrp_state_t *s = (usrp_state_t *)device->priv;
int nsamps2; // aligned to upper 32 or 16 byte boundary
int flags_lsb = flags&0xff;
int flags_msb = (flags>>8)&0xff;
int end;
openair0_thread_t *write_thread = &device->write_thread;
openair0_write_package_t *write_package = write_thread->write_package;
AssertFatal( MAX_WRITE_THREAD_BUFFER_SIZE >= cc,"Do not support more than %d cc number\n", MAX_WRITE_THREAD_BUFFER_SIZE);
boolean_t first_packet_state=false,last_packet_state=false;
if (flags_lsb == 2) { // start of burst
// s->tx_md.start_of_burst = true;
// s->tx_md.end_of_burst = false;
first_packet_state = true;
last_packet_state = false;
} else if (flags_lsb == 3) { // end of burst
//s->tx_md.start_of_burst = false;
//s->tx_md.end_of_burst = true;
first_packet_state = false;
last_packet_state = true;
} else if (flags_lsb == 4) { // start and end
// s->tx_md.start_of_burst = true;
// s->tx_md.end_of_burst = true;
first_packet_state = true;
last_packet_state = true;
} else if (flags_lsb==1) { // middle of burst
// s->tx_md.start_of_burst = false;
// s->tx_md.end_of_burst = false;
first_packet_state = false;
last_packet_state = false;
}
else if (flags_lsb==10) { // fail safe mode
// s->tx_md.has_time_spec = false;
// s->tx_md.start_of_burst = false;
// s->tx_md.end_of_burst = true;
first_packet_state = false;
last_packet_state = true;
}
if(usrp_tx_thread == 0){
#if defined(__x86_64) || defined(__i386__)
#ifdef __AVX2__
nsamps2 = (nsamps+7)>>3;
__m256i buff_tx[8][nsamps2];
#else
nsamps2 = (nsamps+3)>>2;
__m128i buff_tx[8][nsamps2];
#endif
#elif defined(__arm__)
nsamps2 = (nsamps+3)>>2;
int16x8_t buff_tx[8][nsamps2];
#else
#error Unsupported CPU architecture, USRP device cannot be built
#endif
// bring RX data into 12 LSBs for softmodem RX
for (int i=0; i<cc; i++) {
for (int j=0; j<nsamps2; j++) {
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
buff_tx[i][j] = _mm256_slli_epi16(((__m256i *)buff[i])[j],4);
#else
buff_tx[i][j] = _mm_slli_epi16(((__m128i *)buff[i])[j],4);
#endif
#elif defined(__arm__)
buff_tx[i][j] = vshlq_n_s16(((int16x8_t *)buff[i])[j],4);
#endif
}
}
s->tx_md.has_time_spec = true;
s->tx_md.start_of_burst = (s->tx_count==0) ? true : first_packet_state;
s->tx_md.end_of_burst = last_packet_state;
s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
s->tx_count++;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_BEAM_SWITCHING_GPIO,1);
// bit 3 enables gpio (for backward compatibility)
if (flags_msb&8) {
// push GPIO bits 7-9 from flags_msb
int gpio789=(flags_msb&7)<<7;
s->usrp->set_command_time(s->tx_md.time_spec);
s->usrp->set_gpio_attr("FP0", "OUT", gpio789, 0x380);
s->usrp->clear_command_time();
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_BEAM_SWITCHING_GPIO,0);
if (cc>1) {
std::vector<void *> buff_ptrs;
for (int i=0; i<cc; i++)
buff_ptrs.push_back(&(((int16_t *)buff_tx[i])[0]));
ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md);
}
else {
ret = (int)s->tx_stream->send(&(((int16_t *)buff_tx[0])[0]), nsamps, s->tx_md);
}
if (ret != nsamps) LOG_E(HW,"[xmit] tx samples %d != %d\n",ret,nsamps);
return ret;
}
else{
pthread_mutex_lock(&write_thread->mutex_write);
if(write_thread->count_write >= MAX_WRITE_THREAD_PACKAGE){
LOG_W(HW,"Buffer overflow, count_write = %d, start = %d end = %d, resetting write package\n", write_thread->count_write, write_thread->start, write_thread->end);
write_thread->end = write_thread->start;
write_thread->count_write = 0;
}
end = write_thread->end;
write_package[end].timestamp = timestamp;
write_package[end].nsamps = nsamps;
write_package[end].cc = cc;
write_package[end].first_packet = first_packet_state;
write_package[end].last_packet = last_packet_state;
write_package[end].flags_msb = flags_msb;
for (int i = 0; i < cc; i++)
write_package[end].buff[i] = buff[i];
write_thread->count_write++;
write_thread->end = (write_thread->end + 1)% MAX_WRITE_THREAD_PACKAGE;
LOG_I(HW,"Signaling TX TS %llu\n",(unsigned long long)timestamp);
pthread_cond_signal(&write_thread->cond_write);
pthread_mutex_unlock(&write_thread->mutex_write);
return 0;
}
}
//-----------------------start--------------------------
/*! \brief Called to send samples to the USRP RF target
@param device pointer to the device structure specific to the RF hardware target
@param timestamp The timestamp at which the first sample MUST be sent
@param buff Buffer which holds the samples
@param nsamps number of samples to be sent
@param antenna_id index of the antenna if the device has multiple antennas
@param flags flags must be set to TRUE if timestamp parameter needs to be applied
*/
void *trx_usrp_write_thread(void * arg){
int ret=0;
openair0_device *device=(openair0_device *)arg;
openair0_thread_t *write_thread = &device->write_thread;
openair0_write_package_t *write_package = write_thread->write_package;
usrp_state_t *s; int nsamps2; // aligned to upper 32 or 16 byte boundary
int start;
openair0_timestamp timestamp;
void **buff;
int nsamps;
int cc;
signed char first_packet;
signed char last_packet;
int flags_msb;
while(1){
pthread_mutex_lock(&write_thread->mutex_write);
while (write_thread->count_write == 0) {
pthread_cond_wait(&write_thread->cond_write,&write_thread->mutex_write); // this unlocks mutex_rxtx while waiting and then locks it again
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE_THREAD, 1 );
s = (usrp_state_t *)device->priv;
start = write_thread->start;
timestamp = write_package[start].timestamp;
buff = write_package[start].buff;
nsamps = write_package[start].nsamps;
cc = write_package[start].cc;
first_packet = write_package[start].first_packet;
last_packet = write_package[start].last_packet;
flags_msb = write_package[start].flags_msb;
write_thread->start = (write_thread->start + 1)% MAX_WRITE_THREAD_PACKAGE;
write_thread->count_write--;
pthread_mutex_unlock(&write_thread->mutex_write);
/*if(write_thread->count_write != 0){
LOG_W(HW,"count write = %d, start = %d, end = %d\n", write_thread->count_write, write_thread->start, write_thread->end);
}*/
#if defined(__x86_64) || defined(__i386__)
#ifdef __AVX2__
nsamps2 = (nsamps+7)>>3;
__m256i buff_tx[8][nsamps2];
#else
nsamps2 = (nsamps+3)>>2;
__m128i buff_tx[8][nsamps2];
#endif
#elif defined(__arm__)
nsamps2 = (nsamps+3)>>2;
int16x8_t buff_tx[8][nsamps2];
#else
#error Unsupported CPU architecture, USRP device cannot be built
#endif
// bring RX data into 12 LSBs for softmodem RX
for (int i=0; i<cc; i++) {
for (int j=0; j<nsamps2; j++) {
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
buff_tx[i][j] = _mm256_slli_epi16(((__m256i *)buff[i])[j],4);
#else
buff_tx[i][j] = _mm_slli_epi16(((__m128i *)buff[i])[j],4);
#endif
#elif defined(__arm__)
buff_tx[i][j] = vshlq_n_s16(((int16x8_t *)buff[i])[j],4);
#endif
}
}
s->tx_md.has_time_spec = true;
s->tx_md.start_of_burst = (s->tx_count==0) ? true : first_packet;
s->tx_md.end_of_burst = last_packet;
s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
s->tx_count++;
// bit 3 enables gpio (for backward compatibility) if (flags_msb&8) {
// push GPIO bits 7-9 from flags_msb
int gpio789=(flags_msb&7)<<7;
s->usrp->set_command_time(s->tx_md.time_spec);
s->usrp->set_gpio_attr("FP0", "OUT", gpio789, 0x380);
s->usrp->clear_command_time();
}
if (cc>1) {
std::vector<void *> buff_ptrs;
for (int i=0; i<cc; i++)
buff_ptrs.push_back(&(((int16_t *)buff_tx[i])[0]));
ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md);
}
else {
ret = (int)s->tx_stream->send(&(((int16_t *)buff_tx[0])[0]), nsamps, s->tx_md);
}
if (ret != nsamps) LOG_E(HW,"[xmit] tx samples %d != %d\n",ret,nsamps);
VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_USRP_SEND_RETURN, ret );
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE_THREAD, 0 );
if(0) break;
}
return NULL;
}
int trx_usrp_write_init(openair0_device *device){
uhd::set_thread_priority_safe(1.0);
openair0_thread_t *write_thread = &device->write_thread;
printf("initializing tx write thread\n");
write_thread->start = 0;
write_thread->end = 0;
write_thread->count_write = 0;
printf("end of tx write thread\n");
pthread_create(&write_thread->pthread_write,NULL,trx_usrp_write_thread,(void *)device);
return(0);
}
//---------------------end-------------------------
/*! \brief Receive samples from hardware.
* Read \ref nsamps samples from each channel to buffers. buff[0] is the array for
* the first channel. *ptimestamp is the time at which the first sample
* was received.
* \param device the hardware to use
* \param[out] ptimestamp the time at which the first sample was received.
* \param[out] buff An array of pointers to buffers for received samples. The buffers must be large enough to hold the number of samples \ref nsamps.
* \param nsamps Number of samples. One sample is 2 byte I + 2 byte Q => 4 byte.
* \param antenna_id Index of antenna for which to receive samples
* \returns the number of sample read
*/
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc) {
usrp_state_t *s = (usrp_state_t *)device->priv;
int samples_received=0;
int nsamps2; // aligned to upper 32 or 16 byte boundary
#if defined(__x86_64) || defined(__i386__)
#ifdef __AVX2__
nsamps2 = (nsamps+7)>>3;
__m256i buff_tmp[2][nsamps2];
#else
nsamps2 = (nsamps+3)>>2;
__m128i buff_tmp[2][nsamps2];#endif
#elif defined(__arm__)
nsamps2 = (nsamps+3)>>2;
int16x8_t buff_tmp[2][nsamps2];
#endif
if (cc>1) {
// receive multiple channels (e.g. RF A and RF B)
std::vector<void *> buff_ptrs;
for (int i=0; i<cc; i++) buff_ptrs.push_back(buff_tmp[i]);
samples_received = s->rx_stream->recv(buff_ptrs, nsamps, s->rx_md);
} else {
// receive a single channel (e.g. from connector RF A)
samples_received=0;
while (samples_received != nsamps) {
samples_received += s->rx_stream->recv((void*)((int32_t*)buff_tmp[0]+samples_received),
nsamps-samples_received, s->rx_md);
if ((s->wait_for_first_pps == 0) && (s->rx_md.error_code!=uhd::rx_metadata_t::ERROR_CODE_NONE))
break;
if ((s->wait_for_first_pps == 1) && (samples_received != nsamps)) {
printf("sleep...\n"); //usleep(100);
}
}
if (samples_received == nsamps) s->wait_for_first_pps=0;
}
// bring RX data into 12 LSBs for softmodem RX
for (int i=0; i<cc; i++) {
for (int j=0; j<nsamps2; j++) {
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
// FK: in some cases the buffer might not be 32 byte aligned, so we cannot use avx2
if ((((uintptr_t) buff[i])&0x1F)==0) {
((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],4);
} else {
((__m128i *)buff[i])[2*j] = _mm_srai_epi16(((__m128i *)buff_tmp[i])[2*j],4);
((__m128i *)buff[i])[2*j+1] = _mm_srai_epi16(((__m128i *)buff_tmp[i])[2*j+1],4);
}
#else
((__m128i *)buff[i])[j] = _mm_srai_epi16(buff_tmp[i][j],4);
#endif
#elif defined(__arm__)
((int16x8_t *)buff[i])[j] = vshrq_n_s16(buff_tmp[i][j],4);
#endif
}
}
if (samples_received < nsamps) {
LOG_E(HW,"[recv] received %d samples out of %d\n",samples_received,nsamps);
}
if ( s->rx_md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE)
LOG_E(HW, "%s\n", s->rx_md.to_pp_string(true).c_str());
s->rx_count += nsamps;
s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
*ptimestamp = s->rx_timestamp;
// push GPIO bits 7-9 from flags_msb
/*s->usrp->set_command_time(uhd::time_spec_t::from_ticks((s->rx_timestamp+(2*nsamps)),s->sample_rate));
s->usrp->set_gpio_attr("FP0", "OUT", gpio789<<7, 0x380);
s->usrp->clear_command_time();
gpio789 = (gpio789+1)&7;*/
if (device->recplay_state != NULL) { // record mode
// Copy subframes to memory (later dump on a file)
if (device->recplay_state->nb_samples < device->openair0_cfg->recplay_conf->u_sf_max) {
(device->recplay_state->ms_sample+device->recplay_state->nb_samples)->header = BELL_LABS_IQ_HEADER;
(device->recplay_state->ms_sample+device->recplay_state->nb_samples)->ts = *ptimestamp;
memcpy((device->recplay_state->ms_sample+device->recplay_state->nb_samples)->samples, buff[0], nsamps*4);
device->recplay_state->nb_samples++;
} else exit_function(__FILE__, __FUNCTION__, __LINE__,"Recording reaches max iq limit\n");
}
return samples_received;
}
/*! \brief Compares two variables within precision
* \param a first variable
* \param b second variable
*/
static bool is_equal(double a, double b) {
return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
void *freq_thread(void *arg) {
openair0_device *device=(openair0_device *)arg;
usrp_state_t *s = (usrp_state_t *)device->priv;
s->usrp->set_tx_freq(device->openair0_cfg[0].tx_freq[0]);
s->usrp->set_rx_freq(device->openair0_cfg[0].rx_freq[0]);
return NULL;
}
/*! \brief Set frequencies (TX/RX). Spawns a thread to handle the frequency change to not block the calling thread
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \param dummy dummy variable not used
* \returns 0 in success
*/
int trx_usrp_set_freq(openair0_device *device, openair0_config_t *openair0_cfg, int dont_block) {
usrp_state_t *s = (usrp_state_t *)device->priv;
pthread_t f_thread;
printf("Setting USRP TX Freq %f, RX Freq %f\n",openair0_cfg[0].tx_freq[0],openair0_cfg[0].rx_freq[0]);
// spawn a thread to handle the frequency change to not block the calling thread
if (dont_block == 1)
pthread_create(&f_thread,NULL,freq_thread,(void *)device);
else {
s->usrp->set_tx_freq(device->openair0_cfg[0].tx_freq[0]);
s->usrp->set_rx_freq(device->openair0_cfg[0].rx_freq[0]);
}
return(0);
}
/*! \brief Set RX frequencies
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
*/
int openair0_set_rx_frequencies(openair0_device *device, openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t *)device->priv;
uhd::tune_request_t rx_tune_req(openair0_cfg[0].rx_freq[0]);
rx_tune_req.rf_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
rx_tune_req.rf_freq = openair0_cfg[0].rx_freq[0];
s->usrp->set_rx_freq(rx_tune_req);
return(0);
}
/*! \brief Set Gains (TX/RX)
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
*/int trx_usrp_set_gains(openair0_device *device,
openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t *)device->priv;
::uhd::gain_range_t gain_range_tx = s->usrp->get_tx_gain_range(0);
s->usrp->set_tx_gain(gain_range_tx.stop()-openair0_cfg[0].tx_gain[0]);
::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(0);
// limit to maximum gain
if (openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] > gain_range.stop()) {
LOG_E(HW,"RX Gain 0 too high, reduce by %f dB\n",
openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] - gain_range.stop());
exit(-1);
}
s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0]);
LOG_I(HW,"Setting USRP RX gain to %f (rx_gain %f,gain_range.stop() %f)\n",
openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0],
openair0_cfg[0].rx_gain[0],gain_range.stop());
return(0);
}
/*! \brief Stop USRP
* \param card refers to the hardware index to use
*/
int trx_usrp_stop(openair0_device *device) {
return(0);
}
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_b210[] = {
{3500000000.0,44.0},
{2660000000.0,49.0},
{2300000000.0,50.0},
{1880000000.0,53.0},
{816000000.0,58.0},
{-1,0}
};
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_b210_38[] = {
{3500000000.0,44.0},
{2660000000.0,49.8},
{2300000000.0,51.0},
{1880000000.0,53.0},
{816000000.0,57.0},
{-1,0}
};
/*! \brief USRPx310 RX calibration table */
rx_gain_calib_table_t calib_table_x310[] = {
{3500000000.0,77.0},
{2660000000.0,81.0},
{2300000000.0,81.0},
{1880000000.0,82.0},
{816000000.0,85.0},
{-1,0}
};
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_n310[] = {
{3500000000.0,0.0},
{2660000000.0,0.0},
{2300000000.0,0.0},
{1880000000.0,0.0},
{816000000.0, 0.0},
{-1,0}
};
/*! \brief Set RX gain offset * \param openair0_cfg RF frontend parameters set by application
* \param chain_index RF chain to apply settings to
* \returns 0 in success
*/
void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index,int bw_gain_adjust) {
int i=0;
// loop through calibration table to find best adjustment factor for RX frequency
double min_diff = 6e9,diff,gain_adj=0.0;
if (bw_gain_adjust==1) {
switch ((int)openair0_cfg[0].sample_rate) {
case 46080000:
break;
case 30720000:
break;
case 23040000:
gain_adj=1.25;
break;
case 15360000:
gain_adj=3.0;
break;
case 7680000:
gain_adj=6.0;
break;
case 3840000:
gain_adj=9.0;
break;
case 1920000:
gain_adj=12.0;
break;
default:
LOG_E(HW,"unknown sampling rate %d\n",(int)openair0_cfg[0].sample_rate);
//exit(-1);
break;
}
}
while (openair0_cfg->rx_gain_calib_table[i].freq>0) {
diff = fabs(openair0_cfg->rx_freq[chain_index] - openair0_cfg->rx_gain_calib_table[i].freq);
LOG_I(HW,"cal %d: freq %f, offset %f, diff %f\n",
i,
openair0_cfg->rx_gain_calib_table[i].freq,
openair0_cfg->rx_gain_calib_table[i].offset,diff);
if (min_diff > diff) {
min_diff = diff;
openair0_cfg->rx_gain_offset[chain_index] = openair0_cfg->rx_gain_calib_table[i].offset+gain_adj;
}
i++;
}
}
/*! \brief print the USRP statistics
* \param device the hardware to use
* \returns 0 on success
*/
int trx_usrp_get_stats(openair0_device *device) {
return(0);
}
/*! \brief Reset the USRP statistics
* \param device the hardware to use * \returns 0 on success
*/
int trx_usrp_reset_stats(openair0_device *device) {
return(0);
}
extern "C" {
int device_init(openair0_device *device, openair0_config_t *openair0_cfg) {
LOG_D(HW, "openair0_cfg[0].sdr_addrs == '%s'\n", openair0_cfg[0].sdr_addrs);
LOG_D(HW, "openair0_cfg[0].clock_source == '%d'\n", openair0_cfg[0].clock_source);
usrp_state_t *s ;
if ( device->priv == NULL) {
s=(usrp_state_t *)calloc(sizeof(usrp_state_t),1);
device->priv=s;
AssertFatal( s!=NULL,"USRP device: memory allocation failure\n");
} else {
LOG_E(HW, "multiple device init detected\n");
return 0;
}
device->openair0_cfg = openair0_cfg;
device->trx_start_func = trx_usrp_start;
device->trx_get_stats_func = trx_usrp_get_stats;
device->trx_reset_stats_func = trx_usrp_reset_stats;
device->trx_end_func = trx_usrp_end;
device->trx_stop_func = trx_usrp_stop;
device->trx_set_freq_func = trx_usrp_set_freq;
device->trx_set_gains_func = trx_usrp_set_gains;
device->trx_write_init = trx_usrp_write_init;
// hotfix! to be checked later
uhd::set_thread_priority_safe(1.0);
// Initialize USRP device
int vers=0,subvers=0,subsubvers=0;
int bw_gain_adjust=0;
if (device->openair0_cfg->recplay_mode == RECPLAY_RECORDMODE) {
std::cerr << "USRP device initialized in subframes record mode" << std::endl;
}
sscanf(uhd::get_version_string().c_str(),"%d.%d.%d",&vers,&subvers,&subsubvers);
LOG_I(HW,"UHD version %s (%d.%d.%d)\n",
uhd::get_version_string().c_str(),vers,subvers,subsubvers);
std::string args;
if (openair0_cfg[0].sdr_addrs == NULL) {
args = "type=b200";
} else {
args = openair0_cfg[0].sdr_addrs;
LOG_I(HW,"Checking for USRP with args %s\n",openair0_cfg[0].sdr_addrs);
}
uhd::device_addrs_t device_adds = uhd::device::find(args);
if (device_adds.size() == 0) {
LOG_E(HW,"No USRP Device Found.\n ");
free(s);
return -1;
} else if (device_adds.size() > 1) {
LOG_E(HW,"More than one USRP Device Found. Please specify device more precisely in config file.\n");
free(s);
return -1;
}
LOG_I(HW,"Found USRP %s\n", device_adds[0].get("type").c_str());
double usrp_master_clock;
if (device_adds[0].get("type") == "b200") { device->type = USRP_B200_DEV;
usrp_master_clock = 30.72e6;
args += boost::str(boost::format(",master_clock_rate=%f") % usrp_master_clock);
args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=7680, recv_frame_size=7680" ;
}
if (device_adds[0].get("type") == "n3xx") {
printf("Found USRP n300\n");
device->type=USRP_N300_DEV;
usrp_master_clock = 122.88e6;
args += boost::str(boost::format(",master_clock_rate=%f") % usrp_master_clock);
//args += ", send_buff_size=33554432";
}
if (device_adds[0].get("type") == "x300") {
printf("Found USRP x300\n");
device->type=USRP_X300_DEV;
usrp_master_clock = 184.32e6;
args += boost::str(boost::format(",master_clock_rate=%f") % usrp_master_clock);
// USRP recommended: https://files.ettus.com/manual/page_usrp_x3x0_config.html
if ( 0 != system("sysctl -w net.core.rmem_max=33554432 net.core.wmem_max=33554432") )
LOG_W(HW,"Can't set kernel parameters for X3xx\n");
}
s->usrp = uhd::usrp::multi_usrp::make(args);
if (args.find("clock_source")==std::string::npos) {
if (openair0_cfg[0].clock_source == internal) {
s->usrp->set_clock_source("internal");
LOG_D(HW,"Setting clock source to internal\n");
}
else if (openair0_cfg[0].clock_source == external ) {
s->usrp->set_clock_source("external");
LOG_D(HW,"Setting clock source to external\n");
}
else if (openair0_cfg[0].clock_source==gpsdo) {
s->usrp->set_clock_source("gpsdo");
LOG_D(HW,"Setting clock source to gpsdo\n");
}
else {
LOG_W(HW,"Clock source set neither in usrp_args nor on command line, using default!\n");
}
}
else {
if (openair0_cfg[0].clock_source != unset) {
LOG_W(HW,"Clock source set in both usrp_args and in clock_source, ingnoring the latter!\n");
}
}
if (args.find("time_source")==std::string::npos) {
if (openair0_cfg[0].time_source == internal) {
s->usrp->set_time_source("internal");
LOG_D(HW,"Setting time source to internal\n");
}
else if (openair0_cfg[0].time_source == external ) {
s->usrp->set_time_source("external");
LOG_D(HW,"Setting time source to external\n");
}
else if (openair0_cfg[0].time_source==gpsdo) {
s->usrp->set_time_source("gpsdo");
LOG_D(HW,"Setting time source to gpsdo\n");
}
else {
LOG_W(HW,"Time source set neither in usrp_args nor on command line, using default!\n");
}
}
else {
if (openair0_cfg[0].clock_source != unset) {
LOG_W(HW,"Time source set in both usrp_args and in time_source, ingnoring the latter!\n"); }
}
if (s->usrp->get_clock_source(0) == "gpsdo") {
s->use_gps = 1;
if (sync_to_gps(device)==EXIT_SUCCESS) {
LOG_I(HW,"USRP synced with GPS!\n");
} else {
LOG_I(HW,"USRP fails to sync with GPS. Exiting.\n");
exit(EXIT_FAILURE);
}
} else if (s->usrp->get_clock_source(0) == "external") {
if (check_ref_locked(s,0)) {
LOG_I(HW,"USRP locked to external reference!\n");
} else {
LOG_I(HW,"Failed to lock to external reference. Exiting.\n");
exit(EXIT_FAILURE);
}
}
if (device->type==USRP_X300_DEV) {
openair0_cfg[0].rx_gain_calib_table = calib_table_x310;
std::cerr << "-- Using calibration table: calib_table_x310" << std::endl;
}
if (device->type==USRP_N300_DEV) {
openair0_cfg[0].rx_gain_calib_table = calib_table_n310;
std::cerr << "-- Using calibration table: calib_table_n310" << std::endl;
}
if (device->type==USRP_N300_DEV || device->type==USRP_X300_DEV) {
LOG_I(HW,"%s() sample_rate:%u\n", __FUNCTION__, (int)openair0_cfg[0].sample_rate);
switch ((int)openair0_cfg[0].sample_rate) {
case 122880000:
// from usrp_time_offset
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 15; //to be checked
openair0_cfg[0].tx_bw = 80e6;
openair0_cfg[0].rx_bw = 80e6;
break;
case 92160000:
// from usrp_time_offset
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 15; //to be checked
openair0_cfg[0].tx_bw = 80e6;
openair0_cfg[0].rx_bw = 80e6;
break;
case 61440000:
// from usrp_time_offset
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 15;
openair0_cfg[0].tx_bw = 40e6;
openair0_cfg[0].rx_bw = 40e6;
break;
case 46080000:
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 15;
openair0_cfg[0].tx_bw = 40e6;
openair0_cfg[0].rx_bw = 40e6;
break;
case 30720000:
// from usrp_time_offset //openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 15;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
case 15360000:
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 45;
openair0_cfg[0].tx_bw = 10e6;
openair0_cfg[0].rx_bw = 10e6;
break;
case 7680000:
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 50;
openair0_cfg[0].tx_bw = 5e6;
openair0_cfg[0].rx_bw = 5e6;
break;
case 1920000:
//openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 50;
openair0_cfg[0].tx_bw = 1.25e6;
openair0_cfg[0].rx_bw = 1.25e6;
break;
default:
LOG_E(HW,"Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate);
exit(-1);
break;
}
}
if (device->type == USRP_B200_DEV) {
if ((vers == 3) && (subvers == 9) && (subsubvers>=2)) {
openair0_cfg[0].rx_gain_calib_table = calib_table_b210;
bw_gain_adjust=0;
std::cerr << "-- Using calibration table: calib_table_b210" << std::endl; // Bell Labs info
} else {
openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38;
bw_gain_adjust=1;
std::cerr << "-- Using calibration table: calib_table_b210_38" << std::endl; // Bell Labs info
}
switch ((int)openair0_cfg[0].sample_rate) {
case 46080000:
s->usrp->set_master_clock_rate(46.08e6);
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 115;
openair0_cfg[0].tx_bw = 40e6;
openair0_cfg[0].rx_bw = 40e6;
break;
case 30720000:
s->usrp->set_master_clock_rate(30.72e6);
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 115;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
case 23040000:
s->usrp->set_master_clock_rate(23.04e6); //to be checked
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 113;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
case 15360000:
s->usrp->set_master_clock_rate(30.72e06);
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 103;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
case 7680000:
s->usrp->set_master_clock_rate(30.72e6);
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 80;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
case 1920000:
s->usrp->set_master_clock_rate(30.72e6);
//openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 40;
openair0_cfg[0].tx_bw = 20e6;
openair0_cfg[0].rx_bw = 20e6;
break;
default:
LOG_E(HW,"Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate);
exit(-1);
break;
}
}
/* device specific */
//openair0_cfg[0].txlaunch_wait = 1;//manage when TX processing is triggered
//openair0_cfg[0].txlaunch_wait_slotcount = 1; //manage when TX processing is triggered
openair0_cfg[0].iq_txshift = 4;//shift
openair0_cfg[0].iq_rxrescale = 15;//rescale iqs
for(int i=0; i<((int) s->usrp->get_rx_num_channels()); i++) {
if (i<openair0_cfg[0].rx_num_channels) {
s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i);
s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[i],i);
set_rx_gain_offset(&openair0_cfg[0],i,bw_gain_adjust);
::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(i);
// limit to maximum gain
AssertFatal( openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] <= gain_range.stop(),
"RX Gain too high, lower by %f dB\n",
openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] - gain_range.stop());
s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],i);
LOG_I(HW,"RX Gain %d %f (%f) => %f (max %f)\n",i,
openair0_cfg[0].rx_gain[i],openair0_cfg[0].rx_gain_offset[i],
openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],gain_range.stop());
}
}
LOG_D(HW, "usrp->get_tx_num_channels() == %zd\n", s->usrp->get_tx_num_channels());
LOG_D(HW, "openair0_cfg[0].tx_num_channels == %d\n", openair0_cfg[0].tx_num_channels);
for(int i=0; i<((int) s->usrp->get_tx_num_channels()); i++) {
::uhd::gain_range_t gain_range_tx = s->usrp->get_tx_gain_range(i);
if (i<openair0_cfg[0].tx_num_channels) {
s->usrp->set_tx_rate(openair0_cfg[0].sample_rate,i);
s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[i],i);
s->usrp->set_tx_gain(gain_range_tx.stop()-openair0_cfg[0].tx_gain[i],i);
LOG_I(HW,"USRP TX_GAIN:%3.2lf gain_range:%3.2lf tx_gain:%3.2lf\n", gain_range_tx.stop()-openair0_cfg[0].tx_gain[i], gain_range_tx.stop(), openair0_cfg[0].tx_gain[i]);
}
}
//s->usrp->set_clock_source("external");
//s->usrp->set_time_source("external"); // display USRP settings
LOG_I(HW,"Actual master clock: %fMHz...\n",s->usrp->get_master_clock_rate()/1e6);
LOG_I(HW,"Actual clock source %s...\n",s->usrp->get_clock_source(0).c_str());
LOG_I(HW,"Actual time source %s...\n",s->usrp->get_time_source(0).c_str());
sleep(1);
// create tx & rx streamer
uhd::stream_args_t stream_args_rx("sc16", "sc16");
int samples=openair0_cfg[0].sample_rate;
int max=s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps();
samples/=10000;
LOG_I(HW,"RF board max packet size %u, size for 100µs jitter %d \n", max, samples);
if ( samples < max ) {
stream_args_rx.args["spp"] = str(boost::format("%d") % samples );
}
LOG_I(HW,"rx_max_num_samps %zu\n",
s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps());
for (int i = 0; i<openair0_cfg[0].rx_num_channels; i++)
stream_args_rx.channels.push_back(i);
s->rx_stream = s->usrp->get_rx_stream(stream_args_rx);
uhd::stream_args_t stream_args_tx("sc16", "sc16");
for (int i = 0; i<openair0_cfg[0].tx_num_channels; i++)
stream_args_tx.channels.push_back(i);
s->tx_stream = s->usrp->get_tx_stream(stream_args_tx);
/* Setting TX/RX BW after streamers are created due to USRP calibration issue */
for(int i=0; i<((int) s->usrp->get_tx_num_channels()) && i<openair0_cfg[0].tx_num_channels; i++)
s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
for(int i=0; i<((int) s->usrp->get_rx_num_channels()) && i<openair0_cfg[0].rx_num_channels; i++)
s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
for (int i=0; i<openair0_cfg[0].rx_num_channels; i++) {
LOG_I(HW,"RX Channel %d\n",i);
LOG_I(HW," Actual RX sample rate: %fMSps...\n",s->usrp->get_rx_rate(i)/1e6);
LOG_I(HW," Actual RX frequency: %fGHz...\n", s->usrp->get_rx_freq(i)/1e9);
LOG_I(HW," Actual RX gain: %f...\n", s->usrp->get_rx_gain(i));
LOG_I(HW," Actual RX bandwidth: %fM...\n", s->usrp->get_rx_bandwidth(i)/1e6);
LOG_I(HW," Actual RX antenna: %s...\n", s->usrp->get_rx_antenna(i).c_str());
}
for (int i=0; i<openair0_cfg[0].tx_num_channels; i++) {
LOG_I(HW,"TX Channel %d\n",i);
LOG_I(HW," Actual TX sample rate: %fMSps...\n", s->usrp->get_tx_rate(i)/1e6);
LOG_I(HW," Actual TX frequency: %fGHz...\n", s->usrp->get_tx_freq(i)/1e9);
LOG_I(HW," Actual TX gain: %f...\n", s->usrp->get_tx_gain(i));
LOG_I(HW," Actual TX bandwidth: %fM...\n", s->usrp->get_tx_bandwidth(i)/1e6);
LOG_I(HW," Actual TX antenna: %s...\n", s->usrp->get_tx_antenna(i).c_str());
LOG_I(HW," Actual TX packet size: %lu\n",s->tx_stream->get_max_num_samps());
}
LOG_I(HW,"Device timestamp: %f...\n", s->usrp->get_time_now().get_real_secs());
device->trx_write_func = trx_usrp_write;
device->trx_read_func = trx_usrp_read;
s->sample_rate = openair0_cfg[0].sample_rate;
// TODO:
// init tx_forward_nsamps based usrp_time_offset ex
if(is_equal(s->sample_rate, (double)30.72e6))
s->tx_forward_nsamps = 176;
if(is_equal(s->sample_rate, (double)15.36e6))
s->tx_forward_nsamps = 90;
if(is_equal(s->sample_rate, (double)7.68e6)) s->tx_forward_nsamps = 50;
if (device->recplay_state != NULL) { // record mode
device->recplay_state->ms_sample = (iqrec_t *) malloc(openair0_cfg[0].recplay_conf->u_sf_max * sizeof(iqrec_t));
if (device->recplay_state->ms_sample == NULL) {
std::cerr<< "Memory allocation failed for subframe record or replay mode." << std::endl;
exit(-1);
}
memset(device->recplay_state->ms_sample, 0, openair0_cfg[0].recplay_conf->u_sf_max * BELL_LABS_IQ_BYTES_PER_SF);
}
return 0;
}
/*@}*/
}/* extern c */