help with superstar2 GPS receiver

[innovator81]

hello every1,

I have a superstar2 gps receiver...I am trying to get the binary data into LABVIEW 8...but I get only junk characters(encoded binary) into labview..when I run the simple read and write binary.vi file....But if I rightclick on the read binary file then I get to choose the hexadecimal option...the readings are in hex form ..but how do I get binary format...

[Khalid]

Take the raw string and pass it into a "String to Byte Array" function.  Then, index out the U8s and use "Number to Boolean Array" to get the booleans.  Concatenate all the booleans to get your binary data.  You may have to reverse the arrays to get them in the right order. 

Hope this helps.

-Khalid

[innovator81]

hello every1,

I am trying to get gps data into labview file(readgpspositionvelocity.vi) file...but the flow control option in it..i am not sure which one to use..is it the XON-XOFF or RTS/CTS option(in hyperterminal the flow control option is hardware)..the gps receiver i have is superstar2 and the data format is nmea format..any help would be greatly appreciated..

[Robert M]

The Superstar II Manual seems to indicate on page 29 that you should use "no handshaking".

[innovator81]

hi there,

Thnax for replying..yes there is no flow control actually ...I tried running the basic serial read and write VI file option in Labview but still I am not able to get the gps data into labview..I am trying to plot the X,Y,Z coordinates in Labview but nothing comes up on the chart..I am attaching the file along...any help would be greatly appreciated.....

-innovator81

[Robert M]

I'm afraid you have a lot of work ahead of you.  The data coming back from your instrument in string format is quite complex.  You will need to know the exact format of this data and parse it accordingly.  I have seen some applications that parse data in NMEA (National Marine Electronics Association) format (which I assume is what your device is using) and it takes a bit of work to extract the information and present it in a suitable format.  Unfortunately I don't know of any freely available examples that do this.  Perhaps other members of the community will be able to post some code for you.

[Brian_Beal]

Could you please post this in version 7.1?  I have some GPS VIs that might help.

[innovator81]

hello there,

Thanx for replying..It would be great if u could post any gps files online so that I could go through them...I dont have the older version of labview so I cant upload that file in labview 7 version.......

-innovator81

[Brian_Beal]

You should look at this discussion: http://forums.ni.com/ni/board/message?board.id=170&message.id=158841&query.id=74988#M158841  There are a number of VI's posted there by myself and someone else.  For future reference, you can chose "Save as Previous" to convert your 8.0 files to 7.1 files.

[innovator81]

hello every1,

Thanx for replying...I tried using the below attached files which were found on that particular link..and it worked fine...but I want to get this data into graph plotting format(i.e in the form of X,Y and Z format).It would be great if some1 could help me out with this issue..

-thanx
innovator81