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GPS sync improvements

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This commit is contained in:
Florian Kaltenberger
2022-05-29 21:41:18 +02:00
parent b30e673348
commit e141b20836
1 changed files with 10 additions and 13 deletions
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targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+10 -13
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@@ -201,16 +201,6 @@ static int sync_to_gps(openair0_device *device) {
LOG_W(HW,"WARNING: GPS not locked - time will not be accurate until locked\n"); LOG_W(HW,"WARNING: GPS not locked - time will not be accurate until locked\n");
} }
//wait for next pps
uhd::time_spec_t last = s->usrp->get_time_last_pps();
uhd::time_spec_t next = s->usrp->get_time_last_pps();
while(next == last) {
boost::this_thread::sleep(boost::posix_time::milliseconds(50));
last = next;
next = s->usrp->get_time_last_pps();
}
boost::this_thread::sleep(boost::posix_time::milliseconds(200));
//Set to GPS time //Set to GPS time
uhd::time_spec_t gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int())); uhd::time_spec_t gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int()));
s->usrp->set_time_next_pps(gps_time+1.0, mboard); s->usrp->set_time_next_pps(gps_time+1.0, mboard);
@@ -306,11 +296,18 @@ static int trx_usrp_start(openair0_device *device) {
//s->first_rx = 1; //s->first_rx = 1;
s->rx_timestamp = 0; s->rx_timestamp = 0;
uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps(); //wait for next pps
LOG_I(HW,"last pps at %f, starting streaming at %f\n",time_last_pps.get_real_secs(),time_last_pps.get_real_secs()+1.0); uhd::time_spec_t last_pps = s->usrp->get_time_last_pps();
uhd::time_spec_t current_pps = s->usrp->get_time_last_pps();
while(current_pps == last_pps) {
boost::this_thread::sleep(boost::posix_time::milliseconds(1));
current_pps = s->usrp->get_time_last_pps();
}
LOG_I(HW,"current pps at %f, starting streaming at %f\n",current_pps.get_real_secs(),current_pps.get_real_secs()+1.0);
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS); uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = uhd::time_spec_t(time_last_pps+1.0); cmd.time_spec = uhd::time_spec_t(current_pps+1.0);
cmd.stream_now = false; // start at constant delay cmd.stream_now = false; // start at constant delay
s->rx_stream->issue_stream_cmd(cmd); s->rx_stream->issue_stream_cmd(cmd);