[PDA GPS serial] error code 55

[pedroz]

Hi! I have LabView PDA Module 8.2. I am trying to get data from my GPS receiver (Haicom 305III on CF slot) by serial communication in PDA (virtual COM port 4). GPS receiver works fine in any GPS application. I've done some block diagram to get String data from receiver:

but it doesn't work :((
and returns error code 55.
Communication settings are: 4800, N, 8, 1 , COM port 4. It seems to be ok, but it doesn't..

Anybody can help me? And sugest some solution?

Thanks.
Peter

[NoahR]

Hi Peter,

Thanks for contacting National Instruments.  I have been looking into your question about the error you are receiving, and a very common theme that I am finding with others that have received this error seems to be that the specific serial port you are trying to access may already be pre-allocated to be used by another peripheral like the keyboard.  I have attached a link below that briefly explains this and what has been done in the past to fix this error.  I know that the specific PDA that is referenced in the knowledgebase may not be yours, but this method has worked on different models of PDAs in the past.  If you have any more questions about this please feel free to post back at anytime.  Thanks!

http://digital.ni.com/public.nsf/allkb/4D915D99B4FDFEBA86256FB20037F2FC?OpenDocument

[pedroz]

Thanks for your help, but I've already solved the problem 🙂
I made a mistake with setting value of "port" in Serial_Init block. It was really easy 🙂 because in LV COM port starts from 0 not like in Windows form COM1...COM X.
And, when I wanted to open COM4 I should have set "port" value to 3 🙂
And that's all.
Peter.

[NoahR]

Hi Peter,

That's great! I'm glad you got it figured out.  I guess you can keep my post from earlier in the back of your mind in case you see an error like that come up again .  Good luck with your application in the future!