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

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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
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19
src/algorithms/libs/gnss_sdr_sample_counter.cc
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@@ -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",
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)))
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 * 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);