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openairinterface5g/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
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/*
* 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 1.0 (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
*/
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <uhd/utils/thread_priority.hpp>
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/version.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <iostream>
#include <complex>
#include <fstream>
#include <cmath>
#include <time.h>
#include "UTIL/LOG/log_extern.h"
#include "common_lib.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_
* @{
*/
/*! \brief USRP Configuration */
typedef struct
{
// --------------------------------
// variables for USRP configuration
// --------------------------------
//! USRP device pointer
uhd::usrp::multi_usrp::sptr usrp;
//uhd::usrp::multi_usrp::sptr rx_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;
//! USRP Timestamp Information
uhd::time_spec_t tm_spec;
//setup variables and allocate buffer
//! USRP Metadata
uhd::async_metadata_t async_md;
//! Sampling rate
double sample_rate;
//! time offset between transmiter timestamp and receiver timestamp;
double tdiff;
//! TX forward samples. We use usrp_time_offset to get this value
int tx_forward_nsamps; //166 for 20Mhz
// --------------------------------
// Debug and output control
// --------------------------------
//! Number of underflows
int num_underflows;
//! Number of overflows
int num_overflows;
//! Number of sequential errors
int num_seq_errors;
//! tx count
int64_t tx_count;
//! rx count
int64_t rx_count;
//! timestamp of RX packet
openair0_timestamp rx_timestamp;
} usrp_state_t;
/*! \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;
// init recv and send streaming
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
cmd.stream_now = false; // start at constant delay
s->rx_stream->issue_stream_cmd(cmd);
s->tx_md.time_spec = cmd.time_spec + uhd::time_spec_t(1-(double)s->tx_forward_nsamps/s->sample_rate);
s->tx_md.has_time_spec = true;
s->tx_md.start_of_burst = true;
s->tx_md.end_of_burst = false;
s->rx_count = 0;
s->tx_count = 0;
s->rx_timestamp = 0;
device->trx_started=1;
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)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
s->rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
//send a mini EOB packet
s->tx_md.end_of_burst = true;
s->tx_stream->send("", 0, s->tx_md);
s->tx_md.end_of_burst = false;
device->trx_started=0;
}
/*! \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 whicch 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 anteannas
@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)
{
static long long int loop=0;
static long time_min=0, time_max=0, time_avg=0;
struct timespec tp_start, tp_end;
long time_diff;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);
int ret=0, ret_i=0;
usrp_state_t *s = (usrp_state_t*)device->priv;
s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
if(flags>0)
s->tx_md.has_time_spec = true;
else
s->tx_md.has_time_spec = false;
if (flags == 2) { // start of burst
s->tx_md.start_of_burst = true;
s->tx_md.end_of_burst = false;
}
else if (flags == 3) { // end of burst
s->tx_md.start_of_burst = false;
s->tx_md.end_of_burst = true;
}
else if (flags == 4) { // start and end
s->tx_md.start_of_burst = true;
s->tx_md.end_of_burst = true;
}
else if (flags==1) { // middle of burst
s->tx_md.start_of_burst = false;
s->tx_md.end_of_burst = false;
}
if (cc>1) {
std::vector<void *> buff_ptrs;
for (int i=0;i<cc;i++) buff_ptrs.push_back(buff[i]);
ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md,1e-3);
}
else
ret = (int)s->tx_stream->send(buff[0], nsamps, s->tx_md,1e-3);
if (ret != nsamps) {
printf("[xmit] tx samples %d != %d\n",ret,nsamps);
}
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09 + (tp_end.tv_nsec - tp_start.tv_nsec);
if (time_min==0 ||loop==1 || time_min > time_diff)
time_min=time_diff;
if (time_max==0 ||loop==1 || time_max < time_diff)
time_max=time_diff;
if (time_avg ==0 ||loop==1)
time_avg= time_diff;
else
time_avg=(time_diff+time_avg) /2.0;
/* //prints statics of uhd every 10 seconds
if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
LOG_I(HW,"usrp_write: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);
*/
loop++;
return ret;
}
/*! \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)
{
static long long int loop=0;
static long time_min=0, time_max=0, time_avg=0;
struct timespec tp_start, tp_end;
long time_diff;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);
usrp_state_t *s = (usrp_state_t*)device->priv;
int samples_received=0,i,j;
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 (device->type == USRP_B200_DEV) {
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 = s->rx_stream->recv(buff_tmp[0], nsamps, s->rx_md);
}
// 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__
((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],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
}
}
} else if (device->type == USRP_X300_DEV) {
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[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 = s->rx_stream->recv(buff[0], nsamps, s->rx_md);
}
}
if (samples_received < nsamps) {
printf("[recv] received %d samples out of %d\n",samples_received,nsamps);
}
//handle the error code
switch(s->rx_md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
break;
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
printf("[recv] USRP RX OVERFLOW!\n");
s->num_overflows++;
break;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
printf("[recv] USRP RX TIMEOUT!\n");
break;
default:
printf("[recv] Unexpected error on RX, Error code: 0x%x\n",s->rx_md.error_code);
break;
}
s->rx_count += nsamps;
s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
*ptimestamp = s->rx_timestamp;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09 + (tp_end.tv_nsec - tp_start.tv_nsec);
if (time_min==0 ||loop==1 || time_min > time_diff)
time_min=time_diff;
if (time_max==0 ||loop==1 || time_max < time_diff)
time_max=time_diff;
if (time_avg ==0 ||loop==1)
time_avg= time_diff;
else
time_avg=(time_diff+time_avg) /2.0;
/*
//prints statics of uhd every 10 seconds
if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
LOG_I(HW,"usrp_read: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);
loop++;*/
return samples_received;
}
/*! \brief Get current timestamp of USRP
* \param device the hardware to use
*/
openair0_timestamp get_usrp_time(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
return s->usrp->get_time_now().to_ticks(s->sample_rate);
}
/*! \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]);
}
/*! \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;
static int first_call=1;
static double rf_freq,diff;
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];
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;
s->usrp->set_tx_gain(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()) {
printf("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]);
printf("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) {
device->trx_started=0;
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 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 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:
printf("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);
printf("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" {
/*! \brief Initialize Openair USRP target. It returns 0 if OK
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
*/
int device_init(openair0_device* device, openair0_config_t *openair0_cfg) {
uhd::set_thread_priority_safe(1.0);
usrp_state_t *s = (usrp_state_t*)malloc(sizeof(usrp_state_t));
memset(s, 0, sizeof(usrp_state_t));
// Initialize USRP device
device->openair0_cfg = openair0_cfg;
std::string args = "type=b200";
uhd::device_addrs_t device_adds = uhd::device::find(args);
size_t i;
int vers=0,subvers=0,subsubvers=0;
int bw_gain_adjust=0;
sscanf(uhd::get_version_string().c_str(),"%d.%d.%d",&vers,&subvers,&subsubvers);
printf("Checking for USRPs : UHD %s (%d.%d.%d)\n",uhd::get_version_string().c_str(),vers,subvers,subsubvers);
if(device_adds.size() == 0)
{
double usrp_master_clock = 184.32e6;
std::string args = "type=x300";
// workaround for an api problem, master clock has to be set with the constructor not via set_master_clock_rate
args += boost::str(boost::format(",master_clock_rate=%f") % usrp_master_clock);
// args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=4096, recv_frame_size=4096";
uhd::device_addrs_t device_adds = uhd::device::find(args);
if(device_adds.size() == 0)
{
std::cerr<<"No USRP Device Found. " << std::endl;
free(s);
return -1;
}
printf("Found USRP X300\n");
s->usrp = uhd::usrp::multi_usrp::make(args);
// s->usrp->set_rx_subdev_spec(rx_subdev);
// s->usrp->set_tx_subdev_spec(tx_subdev);
// lock mboard clocks
if (openair0_cfg[0].clock_source == internal)
s->usrp->set_clock_source("internal");
else
s->usrp->set_clock_source("external");
//Setting device type to USRP X300/X310
device->type=USRP_X300_DEV;
// this is not working yet, master clock has to be set via constructor
// set master clock rate and sample rate for tx & rx for streaming
//s->usrp->set_master_clock_rate(usrp_master_clock);
openair0_cfg[0].rx_gain_calib_table = calib_table_x310;
switch ((int)openair0_cfg[0].sample_rate) {
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:
printf("Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate);
exit(-1);
break;
}
} else {
printf("Found USRP B200");
args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=15360, recv_frame_size=15360" ;
s->usrp = uhd::usrp::multi_usrp::make(args);
// s->usrp->set_rx_subdev_spec(rx_subdev);
// s->usrp->set_tx_subdev_spec(tx_subdev);
// do not explicitly set the clock to "internal", because this will disable the gpsdo
// // lock mboard clocks
// s->usrp->set_clock_source("internal");
// set master clock rate and sample rate for tx & rx for streaming
// lock mboard clocks
if (openair0_cfg[0].clock_source == internal)
s->usrp->set_clock_source("internal");
else
s->usrp->set_clock_source("external");
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;
}
else {
openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38;
bw_gain_adjust=1;
}
switch ((int)openair0_cfg[0].sample_rate) {
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:
printf("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(i=0;i<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_bandwidth(openair0_cfg[0].rx_bw,i);
//printf("Setting rx freq/gain on channel %lu/%lu : BW %f (readback %f)\n",i,s->usrp->get_rx_num_channels(),openair0_cfg[0].rx_bw/1e6,s->usrp->get_rx_bandwidth(i)/1e6);
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
if (openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] > gain_range.stop()) {
printf("RX Gain %lu too high, lower by %f dB\n",i,openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] - gain_range.stop());
exit(-1);
}
s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],i);
printf("RX Gain %lu %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());
}
}
for(i=0;i<s->usrp->get_tx_num_channels();i++) {
if (i<openair0_cfg[0].tx_num_channels) {
s->usrp->set_tx_rate(openair0_cfg[0].sample_rate,i);
//s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
//printf("Setting tx freq/gain on channel %lu/%lu: BW %f (readback %f)\n",i,s->usrp->get_tx_num_channels(),openair0_cfg[0].tx_bw/1e6,s->usrp->get_tx_bandwidth(i)/1e6);
s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[i],i);
s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[i],i);
}
}
// display USRP settings
std::cout << boost::format("Actual master clock: %fMHz...") % (s->usrp->get_master_clock_rate()/1e6) << std::endl;
sleep(1);
// create tx & rx streamer
uhd::stream_args_t stream_args_rx("sc16", "sc16");
int samples=openair0_cfg[0].sample_rate;
samples/=24000;
// stream_args_rx.args["spp"] = str(boost::format("%d") % samples);
for (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);
std::cout << boost::format("rx_max_num_samps %u") % (s->rx_stream->get_max_num_samps()) << std::endl;
//openair0_cfg[0].samples_per_packet = s->rx_stream->get_max_num_samps();
uhd::stream_args_t stream_args_tx("sc16", "sc16");
//stream_args_tx.args["spp"] = str(boost::format("%d") % 2048);//(openair0_cfg[0].tx_num_channels*openair0_cfg[0].samples_per_packet));
for (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);
std::cout << boost::format("tx_max_num_samps %u") % (s->tx_stream->get_max_num_samps()) << std::endl;
/* Setting TX/RX BW after streamers are created due to USRP calibration issue */
for(i=0;i<s->usrp->get_tx_num_channels();i++) {
if (i<openair0_cfg[0].tx_num_channels) {
s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
printf("Setting tx freq/gain on channel %lu/%lu: BW %f (readback %f)\n",i,s->usrp->get_tx_num_channels(),openair0_cfg[0].tx_bw/1e6,s->usrp->get_tx_bandwidth(i)/1e6);
}
}
for(i=0;i<s->usrp->get_rx_num_channels();i++) {
if (i<openair0_cfg[0].rx_num_channels) {
s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
printf("Setting rx freq/gain on channel %lu/%lu : BW %f (readback %f)\n",i,s->usrp->get_rx_num_channels(),openair0_cfg[0].rx_bw/1e6,s->usrp->get_rx_bandwidth(i)/1e6);
}
}
s->usrp->set_time_now(uhd::time_spec_t(0.0));
for (i=0;i<openair0_cfg[0].rx_num_channels;i++) {
if (i<openair0_cfg[0].rx_num_channels) {
printf("RX Channel %lu\n",i);
std::cout << boost::format("Actual RX sample rate: %fMSps...") % (s->usrp->get_rx_rate(i)/1e6) << std::endl;
std::cout << boost::format("Actual RX frequency: %fGHz...") % (s->usrp->get_rx_freq(i)/1e9) << std::endl;
std::cout << boost::format("Actual RX gain: %f...") % (s->usrp->get_rx_gain(i)) << std::endl;
std::cout << boost::format("Actual RX bandwidth: %fM...") % (s->usrp->get_rx_bandwidth(i)/1e6) << std::endl;
std::cout << boost::format("Actual RX antenna: %s...") % (s->usrp->get_rx_antenna(i)) << std::endl;
}
}
for (i=0;i<openair0_cfg[0].tx_num_channels;i++) {
if (i<openair0_cfg[0].tx_num_channels) {
printf("TX Channel %lu\n",i);
std::cout << std::endl<<boost::format("Actual TX sample rate: %fMSps...") % (s->usrp->get_tx_rate(i)/1e6) << std::endl;
std::cout << boost::format("Actual TX frequency: %fGHz...") % (s->usrp->get_tx_freq(i)/1e9) << std::endl;
std::cout << boost::format("Actual TX gain: %f...") % (s->usrp->get_tx_gain(i)) << std::endl;
std::cout << boost::format("Actual TX bandwidth: %fM...") % (s->usrp->get_tx_bandwidth(i)/1e6) << std::endl;
std::cout << boost::format("Actual TX antenna: %s...") % (s->usrp->get_tx_antenna(i)) << std::endl;
}
}
std::cout << boost::format("Device timestamp: %f...") % (s->usrp->get_time_now().get_real_secs()) << std::endl;
device->priv = s;
device->trx_start_func = trx_usrp_start;
device->trx_write_func = trx_usrp_write;
device->trx_read_func = trx_usrp_read;
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->openair0_cfg = openair0_cfg;
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;
return 0;
}
}
/*@}*/
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