diff options
| -rw-r--r-- | www/gpsd-time-service-howto.txt | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/www/gpsd-time-service-howto.txt b/www/gpsd-time-service-howto.txt index 54fbe5ff..2bca9992 100644 --- a/www/gpsd-time-service-howto.txt +++ b/www/gpsd-time-service-howto.txt @@ -289,17 +289,25 @@ the normal modular way, this package installation will suffice. === Building gpsd == -A full gpsd build includes support for interpreting 1PPS pulses that is mostly +A normal gpsd build includes support for interpreting 1PPS pulses that is mostly autoconfiguring and requires no special setup. You can build a version stripped to the mimimum configuration required -for time service like this: +for time service. This reduces the size of the binary and may + +like this: ----------------------------------------------------------------------------- -scons timeservice=yes nmea0183=yes +scons timeservice=yes nmea0183=yes fixed_port_speed=9600 fixed_stop_bits=1 ----------------------------------------------------------------------------- -You may substitute a different GPS (e.g. "ublox" or "sirf") +You may substitute a different GPS (e.g. "ublox" or "sirf"), You can +also fix the serial parameters to avoid autobauding lag; the code +assumes 8 bit bytes, so the above locks the daeon to 9600 8N1. Besides +the daemon, this also builds gpsmon and ntpshmmon. + +When gpsd is built in this way, the -n (nowait) option is forced; +gpsd opensd its command-line devices immediately on startup. Otherwise, make sure the build is with pps=yes and ntpshm=yes (the default). The command "gpsd -L" should indicate that time-service |