diff options
Diffstat (limited to 'host/lib')
| -rw-r--r-- | host/lib/usrp/gps_ctrl.cpp | 134 |
1 files changed, 109 insertions, 25 deletions
diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp index f3bdded60..917f115f3 100644 --- a/host/lib/usrp/gps_ctrl.cpp +++ b/host/lib/usrp/gps_ctrl.cpp @@ -26,6 +26,10 @@ #include <boost/thread/thread.hpp> #include <boost/tokenizer.hpp> #include <boost/format.hpp> +#include <boost/regex.hpp> + +#include "boost/tuple/tuple.hpp" +#include "boost/foreach.hpp" using namespace uhd; using namespace boost::gregorian; @@ -38,14 +42,69 @@ using namespace boost::this_thread; */ class gps_ctrl_impl : public gps_ctrl{ +private: + std::map<std::string, boost::tuple<std::string, boost::system_time, bool> > sensors; + + std::string get_cached_sensor(const std::string sensor, const int freshness, const bool once, const bool touch=true) { + boost::system_time time = boost::get_system_time(); + try { + // this is nasty ... + //std::cout << boost::format("Requested %s - seen? ") % sensor << sensors[sensor].get<2>() << " once? " << once << std::endl; + if(time - sensors[sensor].get<1>() < milliseconds(freshness) && (!once or !sensors[sensor].get<2>())) { + sensors[sensor] = boost::make_tuple(sensors[sensor].get<0>(), sensors[sensor].get<1>(), touch); + return sensors[sensor].get<0>(); + } else { + return update_cached_sensors(sensor); + } + } catch(std::exception &e) { + UHD_MSG(warning) << "get_cached_sensor: " << e.what(); + } + return std::string(); + } + + std::string update_cached_sensors(const std::string sensor) { + if(not gps_detected() || (gps_type != GPS_TYPE_JACKSON_LABS)) { + UHD_MSG(error) << "get_stat(): unsupported GPS or no GPS detected"; + return std::string(); + } + + std::string msg = _recv(); + static const boost::regex status_regex("\\d\\d-\\d\\d-\\d\\d"); + boost::system_time time = boost::get_system_time(); + if(msg.size() < 6) + return std::string(); + + std::string nmea = msg.substr(1,5); + const std::list<std::string> list = boost::assign::list_of("GPGGA")("GPRMC"); + BOOST_FOREACH(std::string key, list) { + // beginning matches one of the NMEA keys + if(!nmea.compare(key)) { + sensors[key] = boost::make_tuple(msg, time, !sensor.compare(key)); + // if this was what we're looking for return it + return (!sensor.compare(key))? msg : std::string(); + } + } + + //We're still here so it's not one of the NMEA strings from above + if(boost::regex_search(msg, status_regex, boost::regex_constants::match_continuous)) { + trim(msg); + sensors["SERVO"] = boost::make_tuple(msg, time, false); + if(!sensor.compare("SERVO")) + return msg; + else + return std::string(); + } + return std::string(); + } public: gps_ctrl_impl(uart_iface::sptr uart){ _uart = uart; + std::string reply; bool i_heard_some_nmea = false, i_heard_something_weird = false; gps_type = GPS_TYPE_NONE; - + //first we look for a Jackson Labs Firefly (since that's what we provide...) _flush(); //get whatever junk is in the rx buffer right now, and throw it away _send("HAAAY GUYYYYS\n"); //to elicit a response from the Firefly @@ -60,7 +119,7 @@ public: if(reply.find("Command Error") != std::string::npos) { gps_type = GPS_TYPE_JACKSON_LABS; break; - } + } else if(reply.substr(0, 3) == "$GP") i_heard_some_nmea = true; //but keep looking for that "Command Error" response else if(reply.length() != 0) i_heard_something_weird = true; //probably wrong baud rate sleep(milliseconds(GPS_TIMEOUT_DELAY_MS)); @@ -99,7 +158,8 @@ public: ("gps_gpgga") ("gps_gprmc") ("gps_time") - ("gps_locked"); + ("gps_locked") + ("gps_servo"); return ret; } @@ -108,7 +168,7 @@ public: or key == "gps_gprmc") { return sensor_value_t( boost::to_upper_copy(key), - get_nmea(boost::to_upper_copy(key.substr(4,8))), + get_cached_sensor(boost::to_upper_copy(key.substr(4,8)), GPS_NMEA_NORMAL_FRESHNESS, false, false), ""); } else if(key == "gps_time") { @@ -117,6 +177,9 @@ public: else if(key == "gps_locked") { return sensor_value_t("GPS lock status", locked(), "locked", "unlocked"); } + else if(key == "gps_servo") { + return sensor_value_t("GPS servo status", get_servo(), ""); + } else { throw uhd::value_error("gps ctrl get_sensor unknown key: " + key); } @@ -138,24 +201,25 @@ private: sleep(milliseconds(FIREFLY_STUPID_DELAY_MS)); _send("GPS:GPRMC 1\n"); sleep(milliseconds(FIREFLY_STUPID_DELAY_MS)); + _send("SERV:TRAC 1\n"); // enable servo trace message + sleep(milliseconds(FIREFLY_STUPID_DELAY_MS)); } - + //retrieve a raw NMEA sentence std::string get_nmea(std::string msgtype) { - msgtype.insert(0, "$"); std::string reply; - if(not gps_detected()) { - UHD_MSG(error) << "get_nmea(): unsupported GPS or no GPS detected"; - return std::string(); - } - - _flush(); //flush all input before waiting for a message const boost::system_time comm_timeout = boost::get_system_time() + milliseconds(GPS_COMM_TIMEOUT_MS); while(boost::get_system_time() < comm_timeout) { - reply = _recv(); - if(reply.substr(0, 6) == msgtype) - return reply; + if(!msgtype.compare("GPRMC")) { + reply = get_cached_sensor(msgtype, GPS_NMEA_FRESHNESS, true); + } + else { + reply = get_cached_sensor(msgtype, GPS_NMEA_LOW_FRESHNESS, false); + } + if(reply.size()) { + if(reply.substr(1, 5) == msgtype) return reply; + } boost::this_thread::sleep(milliseconds(GPS_TIMEOUT_DELAY_MS)); } throw uhd::value_error(str(boost::format("get_nmea(): no %s message found") % msgtype)); @@ -178,7 +242,7 @@ private: ptime get_time(void) { int error_cnt = 0; ptime gps_time; - while(error_cnt < 3) { + while(error_cnt < 2) { try { std::string reply = get_nmea("GPRMC"); @@ -188,29 +252,30 @@ private: if(datestr.size() == 0 or timestr.size() == 0) { throw uhd::value_error(str(boost::format("Invalid response \"%s\"") % reply)); } - + //just trust me on this one - gps_time = ptime( date( + gps_time = 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))) + 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))) ); return gps_time; - + } catch(std::exception &e) { UHD_MSG(warning) << "get_time: " << e.what(); + _flush(); error_cnt++; } } throw uhd::value_error("Timeout after no valid message found"); - + return gps_time; //keep gcc from complaining } - + time_t get_epoch_time(void) { return (get_time() - from_time_t(0)).total_seconds(); } @@ -223,7 +288,7 @@ private: int error_cnt = 0; while(error_cnt < 3) { try { - std::string reply = get_nmea("GPGGA"); + std::string reply = get_cached_sensor("GPGGA", GPS_LOCK_FRESHNESS, false, false); if(reply.size() <= 1) return false; return (get_token(reply, 6) != "0"); @@ -236,6 +301,20 @@ private: return false; } + std::string get_servo(void) { + std::string reply; + + const boost::system_time comm_timeout = boost::get_system_time() + milliseconds(GPS_COMM_TIMEOUT_MS); + while(boost::get_system_time() < comm_timeout) { + reply = get_cached_sensor("SERVO", GPS_SERVO_FRESHNESS, false); + if(reply.size()) + return reply; + boost::this_thread::sleep(milliseconds(GPS_TIMEOUT_DELAY_MS)); + } + throw uhd::value_error("get_stat(): no servo message found"); + return std::string(); + } + uart_iface::sptr _uart; void _flush(void){ @@ -258,7 +337,12 @@ private: GPS_TYPE_NONE } gps_type; - static const int GPS_COMM_TIMEOUT_MS = 1500; + static const int GPS_COMM_TIMEOUT_MS = 1300; + static const int GPS_NMEA_FRESHNESS = 10; + static const int GPS_NMEA_LOW_FRESHNESS = 2500; + static const int GPS_NMEA_NORMAL_FRESHNESS = 1000; + static const int GPS_SERVO_FRESHNESS = 2500; + static const int GPS_LOCK_FRESHNESS = 2500; static const int GPS_TIMEOUT_DELAY_MS = 200; static const int FIREFLY_STUPID_DELAY_MS = 200; }; |