Having problems changing sample rate from 1 HZ to 10 Hz myRIO - PmodGPS

[cwestfall]

Here is the code pertaining only to the GPS.

I'm getting the same error message with the GPS only as I am with the whole program. (see earlier attachements for the other code).

[cwestfall]

After messing with the program for a little while, I see the error is coming from my VISA reader just inside of my loop.

I did some searching online and found that my serial port and device may not be configured the same.

I opened Measurement and Automation explorer to check out what is going on. It appears that my port is stlill configured at 9600 but now the program is at 38400 (is that right?)

I opened the VISA test panel and I'm getting the following error

[Dennis_Knutson]

I can't look at the program - posting from my phone.

The settings in MAX are irrelevant. The program is not supposed to change them. The error happens because you can't open the serial port from two different programs. Your LabVIEW program has to close first.

[cwestfall]

What about not being able to access or read the ASRL10::instr "LPT1" ?

Both of my computers have this issue. My desk top has COM1 and 2. I can change the Baud rate on those. But I cannot get into the ASRL10::Instr "LPT1" in either computer

[dkfire]

That is because it is on a real-time target like your myRIO

[cwestfall]

So, what do I need to change or add to get this code to work, in order to change the sampling rate?

[Dennis_Knutson]

LPT1 is a printer port. Don't attempt to use something that physically doesn't exist.

[cwestfall]

Ok, so I will ignore all of the measurement stuff, but then I'm back to where I started. How do I change the frequency?

[cwestfall]

I found a thread with someone having a similiar issue. Here is what he did.

"

My solution..

My program use wait on event triggered by the termination character and when the error occurs I just remove the error, flush the buffer, (wait for the next termination character) and read again. Seems to work like a charm

"

Is this a valid solution? Also, I don't understand what he is saying. How do you "just remove the error"?

(Here is the link http://forums.ni.com/t5/LabVIEW/Error-1073807253/td-p/306687/highlight/true/page/2

[dnchen]

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@cwestfall wrote:

I found a thread with someone having a similiar issue. Here is what he did.

"

My solution..

My program use wait on event triggered by the termination character and when the error occurs I just remove the error, flush the buffer, (wait for the next termination character) and read again. Seems to work like a charm

"

Is this a valid solution? Also, I don't understand what he is saying. How do you "just remove the error"?

(Here is the link http://forums.ni.com/t5/LabVIEW/Error-1073807253/td-p/306687/highlight/true/page/2

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I'm not sure how this is relevant to the changing the sample rate. Are you getting Error -1073807253 on the VISA Read call? I'd take a look at this article if you are:

http://digital.ni.com/public.nsf/allkb/F3E0621CB71AA16786256F970000FC57?OpenDocument