 |
<< Astronomical Algorithms | index | SHA1files >> NMEAsyncNMEasync is a 32 bits console application that uses the data supplied by a GPS receiver to synchronize the date and time of a PC running Windows. The GPS receiver must generate NMEA sentences, and be connected to the PC using a serial cable. NMEAsync uses the "$GPRMC" NMEA sentence to obtain the current date and time. Usage is : NMEAsync [/port=] [/mindiff=] [/maxdiff=] [/settime] [/leapseconds=] /port= COM1, COM2, ..., COMn
/baudrate=n serial port baudrate
/mindiff=n do not set time if difference is less than n seconds
/maxdiff=n do not set time if difference is more than n seconds
/leapseconds=n add n seconds to the time supplied in NMEA message
(for buggy GPS's)
/settime actually set the time
The defaults values are /port=COM1 /baudrate=4800 /mindiff=2 /maxdiff=300. The system time will NOT be changed if /settime is not specified. NMEAsync returns an errorlevel 0 if everything went OK, and a positive value otherwise. NMEAsync is freeware. Download NMEAsync_2_3.zip (+ 25 Kb - July 29, 2003)
Help, comments and suggestions are welcome: write to Christophe DAVID . << Astronomical Algorithms | index | SHA1files >>
|
