mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2025-10-31 07:13:03 +00:00
Code Issues Releases Wiki Activity

Adding an option to SDR sample counter to modulate the observable generation rate. It defaults to 20 ms interval (50 Hz)

Browse Source
This commit is contained in:
Javier Arribas
2018-08-07 20:04:44 +02:00
parent 00f03a679a
commit b47d7826eb
3 changed files with 25 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/algorithms/libs/gnss_sdr_sample_counter.cc
View File

@@ -36,14 +36,16 @@
#include <iostream>
#include <string>
gnss_sdr_sample_counter::gnss_sdr_sample_counter(double _fs, size_t _size) : gr::sync_decimator("sample_counter",
gnss_sdr_sample_counter::gnss_sdr_sample_counter(double _fs, int _interval_ms, size_t _size) : gr::sync_decimator("sample_counter",
gr::io_signature::make(1, 1, _size),
gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)),
static_cast<unsigned int>(std::round(_fs * 0.001)))
static_cast<unsigned int>(std::round(_fs * static_cast<double>(_interval_ms) / 1e3)))
{
message_port_register_out(pmt::mp("sample_counter"));
set_max_noutput_items(1);
samples_per_output = std::round(_fs * 0.001);
interval_ms = _interval_ms;
fs = _fs;
samples_per_output = std::round(fs * static_cast<double>(interval_ms) / 1e3);
sample_counter = 0;
current_T_rx_ms = 0;
current_s = 0;
@@ -58,9 +60,9 @@ gnss_sdr_sample_counter::gnss_sdr_sample_counter(double _fs, size_t _size) : gr:
}
gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, size_t _size)
gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, int _interval_ms, size_t _size)
{
gnss_sdr_sample_counter_sptr sample_counter_(new gnss_sdr_sample_counter(_fs, _size));
gnss_sdr_sample_counter_sptr sample_counter_(new gnss_sdr_sample_counter(_fs, _interval_ms, _size));
return sample_counter_;
}
@@ -74,6 +76,7 @@ int gnss_sdr_sample_counter::work(int noutput_items __attribute__((unused)),
out[0].Flag_valid_symbol_output = false;
out[0].Flag_valid_word = false;
out[0].Channel_ID = -1;
out[0].fs = fs;
if ((current_T_rx_ms % report_interval_ms) == 0)
{
current_s++;
@@ -134,6 +137,6 @@ int gnss_sdr_sample_counter::work(int noutput_items __attribute__((unused)),
}
sample_counter += samples_per_output;
out[0].Tracking_sample_counter = sample_counter;
current_T_rx_ms++;
current_T_rx_ms += interval_ms;
return 1;
}

10
src/algorithms/libs/gnss_sdr_sample_counter.h
View File

@@ -39,14 +39,16 @@ class gnss_sdr_sample_counter;
typedef boost::shared_ptr<gnss_sdr_sample_counter> gnss_sdr_sample_counter_sptr;
gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, size_t _size);
gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, int _interval_ms, size_t _size);
class gnss_sdr_sample_counter : public gr::sync_decimator
{
private:
gnss_sdr_sample_counter(double _fs, size_t _size);
gnss_sdr_sample_counter(double _fs, int _interval_ms, size_t _size);
unsigned int samples_per_output;
unsigned long int sample_counter;
double fs;
unsigned long long int sample_counter;
int interval_ms;
long long int current_T_rx_ms; // Receiver time in ms since the beginning of the run
unsigned int current_s; // Receiver time in seconds, modulo 60
bool flag_m; // True if the receiver has been running for at least 1 minute
@@ -59,7 +61,7 @@ private:
bool flag_enable_send_msg;
public:
friend gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, size_t _size);
friend gnss_sdr_sample_counter_sptr gnss_sdr_make_sample_counter(double _fs, int _interval_ms, size_t _size);
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);

12
src/core/receiver/gnss_flowgraph.cc
View File

@@ -277,7 +277,8 @@ void GNSSFlowgraph::connect()
std::cout << "Set GNSS-SDR.internal_fs_sps in configuration file" << std::endl;
throw(std::invalid_argument("Set GNSS-SDR.internal_fs_sps in configuration"));
}
ch_out_sample_counter = gnss_sdr_make_sample_counter(fs, sig_conditioner_.at(0)->get_right_block()->output_signature()->sizeof_stream_item(0));
int observable_interval_ms = static_cast<double>(configuration_->property("GNSS-SDR.observable_interval_ms", 20));
ch_out_sample_counter = gnss_sdr_make_sample_counter(fs, observable_interval_ms, sig_conditioner_.at(0)->get_right_block()->output_signature()->sizeof_stream_item(0));
top_block_->connect(sig_conditioner_.at(0)->get_right_block(), 0, ch_out_sample_counter, 0);
top_block_->connect(ch_out_sample_counter, 0, observables_->get_left_block(), channels_count_); //extra port for the sample counter pulse
}
@@ -296,8 +297,9 @@ void GNSSFlowgraph::connect()
{
//null source
null_source_ = gr::blocks::null_source::make(sizeof(Gnss_Synchro));
//throttle 1kHz
throttle_ = gr::blocks::throttle::make(sizeof(Gnss_Synchro), 1000); // 1000 samples per second (1kHz)
//throttle to observable interval
int observable_interval_ms = static_cast<double>(configuration_->property("GNSS-SDR.observable_interval_ms", 20));
throttle_ = gr::blocks::throttle::make(sizeof(Gnss_Synchro), std::round(1.0 / static_cast<double>(observable_interval_ms))); // 1000 samples per second (1kHz)
time_counter_ = gnss_sdr_make_time_counter();
top_block_->connect(null_source_, 0, throttle_, 0);
top_block_->connect(throttle_, 0, time_counter_, 0);
@@ -323,7 +325,9 @@ void GNSSFlowgraph::connect()
std::cout << "Set GNSS-SDR.internal_fs_sps in configuration file" << std::endl;
throw(std::invalid_argument("Set GNSS-SDR.internal_fs_sps in configuration"));
}
ch_out_sample_counter = gnss_sdr_make_sample_counter(fs, sig_conditioner_.at(0)->get_right_block()->output_signature()->sizeof_stream_item(0));
int observable_interval_ms = static_cast<double>(configuration_->property("GNSS-SDR.observable_interval_ms", 20));
ch_out_sample_counter = gnss_sdr_make_sample_counter(fs, observable_interval_ms, sig_conditioner_.at(0)->get_right_block()->output_signature()->sizeof_stream_item(0));
top_block_->connect(sig_conditioner_.at(0)->get_right_block(), 0, ch_out_sample_counter, 0);
top_block_->connect(ch_out_sample_counter, 0, observables_->get_left_block(), channels_count_); //extra port for the sample counter pulse
}