We are trying to receive information such as Latitude and Longitude from a Garmin GPS18xLVC receiver via a serial port on our PC using LabView 7.1. I have successfully connected the GPS unit to the serial port and tested it with HyperTerminal. I have tried the Read GPS Time, Position, Velocity.vi multiple times and continue to receive the following error: Error -1073807360 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi. I think that it has something to do with the configuration of the VISA Serial sub vi. Any suggestions would be greatly appreciated.
I have figured out the issue I had with the Read GPS Time, Position, Velocity.vi. The vi. does not "open" the com port automatically and therefore I had to modify the Read NMEA GPS SubVI to first open the port (VISA Open command) and then continue with the other operations. Once I done that it started working fine. I don't understand why that function was left out as it won't work without it. I have tested the code with a Garmin 18xlvc reciever and it seems to work fine.
That's old and you could upgrade but I used that version for years with 7.1 and never had to use the VISA Open, at least with a normal serial port. I don't understand why it would start to work by adding a VISA Open.
This is my first project with LabView and it has been somewhat of a steep learning curve. My background is in industrial SCADA software such as Wonderware and WinCC. I am starting to get the hang of it now and am impressed with the functionality. I don't know what to tell you about the VISA Open function. I do know that it will not work with out it. I have been fighting it for a couple of days now. I knew it had to be something "simple".
This thread is over 3 years old, and OP hasn't visited since then.
If you're reading NMEA strings from a GPS receiver, use VISA to read the sentences from the receiver, find the word in the sentence and parse the value(s) to the appropriate format.
Thanks for replying.... actually i want to calculate longitude & latitude using GPS... this GPS system will be situated on a road roller. Can u plz tell me how to do it...?
