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-rw-r--r--host/docs/gpsdo.rst2
-rw-r--r--host/docs/usrp2.rst3
-rw-r--r--host/lib/usrp/gps_ctrl.cpp221
3 files changed, 104 insertions, 122 deletions
diff --git a/host/docs/gpsdo.rst b/host/docs/gpsdo.rst
index dc03f6ae9..a0f2d67da 100644
--- a/host/docs/gpsdo.rst
+++ b/host/docs/gpsdo.rst
@@ -53,7 +53,7 @@ GPS data is obtained through the mboard_sensors interface. To retrieve
the current GPS time, use the "gps_time" sensor:
::
-usrp->get_mboard_sensor("gps_time");
+ usrp->get_mboard_sensor("gps_time");
The returned value will be the current epoch time, in seconds since
January 1, 1970. This value is readily converted into human-readable
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst
index fa811d0f6..1b07834fb 100644
--- a/host/docs/usrp2.rst
+++ b/host/docs/usrp2.rst
@@ -395,7 +395,8 @@ they can be queried through the API.
* mimo_locked - clock reference locked over the MIMO cable
* ref_locked - clock reference locked (internal/external)
-* gps_time - GPS seconds (available when GPSDO installed)
+* gps_time - GPS epoch seconds (available when GPSDO installed)
+* gps_locked - GPS lock status
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Multiple RX channels
diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index 582334cae..3cef1ef19 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -21,6 +21,7 @@
#include <uhd/exception.hpp>
#include <uhd/types/sensors.hpp>
#include <boost/algorithm/string.hpp>
+#include <boost/assign/list_of.hpp>
#include <boost/cstdint.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/thread/thread.hpp>
@@ -30,12 +31,12 @@ using namespace uhd;
using namespace boost::gregorian;
using namespace boost::posix_time;
using namespace boost::algorithm;
+using namespace boost::this_thread;
/*!
* A GPS control for Jackson Labs devices (and other NMEA compatible GPS's)
*/
-//TODO: multiple baud rate support (requires mboard_impl changes for poking UART registers)
class gps_ctrl_impl : public gps_ctrl{
public:
gps_ctrl_impl(gps_send_fn_t send, gps_recv_fn_t recv){
@@ -53,14 +54,14 @@ public:
//then we loop until we either timeout, or until we get a response that indicates we're a JL device
int timeout = GPS_TIMEOUT_TRIES;
while(timeout--) {
- reply = safe_gps_read();
- if(boost::trim_right_copy(reply) == "Command Error") {
+ reply = _recv();
+ if(reply.find("Command Error") != std::string::npos) {
gps_type = GPS_TYPE_JACKSON_LABS;
break;
}
else if(reply.substr(0, 3) == "$GP") i_heard_some_nmea = true; //but keep looking for that "Command Error" response
else if(reply.length() != 0) i_heard_something_weird = true; //probably wrong baud rate
- boost::this_thread::sleep(boost::posix_time::milliseconds(200));
+ sleep(milliseconds(200));
}
if((i_heard_some_nmea) && (gps_type != GPS_TYPE_JACKSON_LABS)) gps_type = GPS_TYPE_GENERIC_NMEA;
@@ -69,46 +70,16 @@ public:
UHD_MSG(error) << "GPS invalid reply \"" << reply << "\", assuming none available" << std::endl;
}
- bool found_gprmc = false;
-
switch(gps_type) {
case GPS_TYPE_JACKSON_LABS:
UHD_MSG(status) << "Found a Jackson Labs GPS" << std::endl;
- //issue some setup stuff so it spits out the appropriate data
- //none of these should issue replies so we don't bother looking for them
- //we have to sleep between commands because the JL device, despite not acking, takes considerable time to process each command.
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("SYST:COMM:SER:ECHO OFF\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("SYST:COMM:SER:PRO OFF\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("GPS:GPGGA 1\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("GPS:GGAST 0\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("GPS:GPRMC 1\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
- _send("GPS:GPGSA 1\n");
- boost::this_thread::sleep(boost::posix_time::milliseconds(FIREFLY_STUPID_DELAY_MS));
-// break;
+ init_firefly();
case GPS_TYPE_GENERIC_NMEA:
if(gps_type == GPS_TYPE_GENERIC_NMEA) UHD_MSG(status) << "Found a generic NMEA GPS device" << std::endl;
- found_gprmc = false;
- //here we loop around looking for a GPRMC packet. if we don't get one, we don't have a usable GPS.
- timeout = GPS_TIMEOUT_TRIES;
- while(timeout--) {
- reply = safe_gps_read();
- if(reply.substr(0, 6) == "$GPRMC") {
- found_gprmc = true;
- break;
- }
- boost::this_thread::sleep(boost::posix_time::milliseconds(GPS_TIMEOUT_DELAY_MS));
- }
- if(!found_gprmc) {
- if(gps_type == GPS_TYPE_JACKSON_LABS) UHD_MSG(error) << "Firefly GPS not locked or warming up." << std::endl;
- else UHD_MSG(error) << "GPS does not output GPRMC packets. Cannot retrieve time." << std::endl;
- gps_type = GPS_TYPE_NONE;
+ if(get_time() == ptime()) {
+ UHD_MSG(status) << "No valid GPRMC packet found. Ignoring discovered GPS.";
+ gps_type = GPS_TYPE_NONE;
}
break;
@@ -120,46 +91,63 @@ public:
}
~gps_ctrl_impl(void){
-
+ /* NOP */
}
- std::string safe_gps_read() {
- return _recv();
+ //return a list of supported sensors
+ std::vector<std::string> get_sensors(void) {
+ std::vector<std::string> ret = boost::assign::list_of
+ ("gps_gpgga")
+ ("gps_gprmc")
+ ("gps_gpgsa")
+ ("gps_time")
+ ("gps_locked");
+ return ret;
}
- ptime get_time(void) {
- std::string reply;
- boost::tokenizer<boost::escaped_list_separator<char> > tok(reply);
- std::vector<std::string> toked;
-
- reply = get_nmea("GPRMC");
- //make sure we got something
- if(reply.size() <= 1) {
- return ptime();
+ uhd::sensor_value_t get_sensor(std::string key) {
+ if(key == "gps_gpgga"
+ or key == "gps_gprmc"
+ or key == "gps_gpgsa") {
+ return sensor_value_t(
+ boost::to_upper_copy(key),
+ get_nmea(boost::to_upper_copy(key.substr(4,8))),
+ "");
}
-
- tok.assign(reply);
- toked.assign(tok.begin(), tok.end());
-
- if(not toked.size() == 12) {
- UHD_MSG(error) << "get_time(): invalid GPRMC time sentence received.";
- return ptime();
+ else if(key == "gps_time") {
+ return sensor_value_t("GPS epoch time", int(get_epoch_time()), "seconds");
+ }
+ else if(key == "gps_locked") {
+ return sensor_value_t("GPS lock status", locked(), "locked", "unlocked");
+ }
+ else {
+ UHD_THROW_PROP_GET_ERROR();
}
-
- return ptime( date(
- greg_year(boost::lexical_cast<int>(toked[9].substr(4, 2)) + 2000), //just trust me on this one
- greg_month(boost::lexical_cast<int>(toked[9].substr(2, 2))),
- greg_day(boost::lexical_cast<int>(toked[9].substr(0, 2)))
- ),
- hours( boost::lexical_cast<int>(toked[1].substr(0, 2)))
- + minutes(boost::lexical_cast<int>(toked[1].substr(2, 2)))
- + seconds(boost::lexical_cast<int>(toked[1].substr(4, 2)))
- );
}
- //retrieve a raw NMEA sentence for user parsing
- std::string get_nmea(std::string type) {
- type.insert(0, "$");
+private:
+ void init_firefly(void) {
+ //issue some setup stuff so it spits out the appropriate data
+ //none of these should issue replies so we don't bother looking for them
+ //we have to sleep between commands because the JL device, despite not acking, takes considerable time to process each command.
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("SYST:COMM:SER:ECHO OFF\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("SYST:COMM:SER:PRO OFF\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("GPS:GPGGA 1\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("GPS:GGAST 0\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("GPS:GPRMC 1\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ _send("GPS:GPGSA 1\n");
+ sleep(milliseconds(FIREFLY_STUPID_DELAY_MS));
+ }
+
+ //retrieve a raw NMEA sentence
+ std::string get_nmea(std::string msgtype) {
+ msgtype.insert(0, "$");
std::string reply;
if(not gps_detected()) {
UHD_MSG(error) << "get_nmea(): unsupported GPS or no GPS detected";
@@ -167,17 +155,54 @@ public:
}
int timeout = GPS_TIMEOUT_TRIES;
while(timeout--) {
- reply = safe_gps_read();
- if(reply.substr(0, 6) == type)
+ reply = _recv();
+ if(reply.substr(0, 6) == msgtype)
return reply;
- boost::this_thread::sleep(boost::posix_time::milliseconds(GPS_TIMEOUT_DELAY_MS));
+ boost::this_thread::sleep(milliseconds(GPS_TIMEOUT_DELAY_MS));
}
- UHD_MSG(error) << "get_nmea(): no " << type << " message found";
+ UHD_MSG(error) << "get_nmea(): no " << msgtype << " message found";
return std::string();
}
+
+ //helper function to retrieve a field from an NMEA sentence
+ std::string get_token(std::string sentence, size_t offset) {
+ boost::tokenizer<boost::escaped_list_separator<char> > tok(sentence);
+ std::vector<std::string> toked;
+
+ tok.assign(sentence);
+ toked.assign(tok.begin(), tok.end());
+
+ if(toked.size() <= offset) {
+ UHD_MSG(error) << "get_token: too few tokens in reply " << sentence;
+ return std::string();
+ }
+ return toked[offset];
+ }
+
+ ptime get_time(void) {
+ std::string reply = get_nmea("GPRMC");
+
+ std::string datestr = get_token(reply, 9);
+ std::string timestr = get_token(reply, 1);
+
+ if(datestr.size() == 0 or timestr.size() == 0) {
+ return ptime();
+ }
+
+ //just trust me on this one
+ return ptime( date(
+ greg_year(boost::lexical_cast<int>(datestr.substr(4, 2)) + 2000),
+ greg_month(boost::lexical_cast<int>(datestr.substr(2, 2))),
+ greg_day(boost::lexical_cast<int>(datestr.substr(0, 2)))
+ ),
+ hours( boost::lexical_cast<int>(timestr.substr(0, 2)))
+ + minutes(boost::lexical_cast<int>(timestr.substr(2, 2)))
+ + seconds(boost::lexical_cast<int>(timestr.substr(4, 2)))
+ );
+ }
time_t get_epoch_time(void) {
- return (get_time() - boost::posix_time::from_time_t(0)).total_seconds();
+ return (get_time() - from_time_t(0)).total_seconds();
}
bool gps_detected(void) {
@@ -188,52 +213,9 @@ public:
std::string reply = get_nmea("GPGGA");
if(reply.size() <= 1) return false;
- boost::tokenizer<boost::escaped_list_separator<char> > tok(reply);
- std::vector<std::string> toked;
-
- tok.assign(reply);
- toked.assign(tok.begin(), tok.end());
-
- if(toked.size() != 15) {
- UHD_MSG(error) << "gps_locked: invalid GPGGA response";
- return false;
- }
-
- return (toked[6] != "0");
- }
-
- //return a list of supported sensors
- std::vector<std::string> get_sensors(void) {
- std::vector<std::string> ret;
- ret.push_back("gps_gpgga");
- ret.push_back("gps_gprmc");
- ret.push_back("gps_gpgsa");
- ret.push_back("gps_time");
- ret.push_back("gps_locked");
- return ret;
+ return (get_token(reply, 6) != "0");
}
- uhd::sensor_value_t get_sensor(std::string key) {
- if(key == "gps_gpgga"
- or key == "gps_gprmc"
- or key == "gps_gpgsa") {
- return sensor_value_t(
- boost::to_upper_copy(key),
- get_nmea(boost::to_upper_copy(key.substr(4,8))),
- "");
- }
- else if(key == "gps_time") {
- return sensor_value_t("GPS epoch time", int(get_epoch_time()), "seconds");
- }
- else if(key == "gps_locked") {
- return sensor_value_t("GPS lock status", locked(), "locked", "unlocked");
- }
- else {
- UHD_THROW_PROP_GET_ERROR();
- }
- }
-
-private:
gps_send_fn_t _send;
gps_recv_fn_t _recv;
@@ -246,7 +228,6 @@ private:
static const int GPS_TIMEOUT_TRIES = 10;
static const int GPS_TIMEOUT_DELAY_MS = 200;
static const int FIREFLY_STUPID_DELAY_MS = 200;
-
};
/***********************************************************************
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 21:43:06 +0000