Problem related USB Virtual COM PORT using PDA module 8.2 on Windows CE

Hi,
I am working on tranferring my application developed on LV 8.2 to a Single-board computer(SBC) running Windows CE 5.0. I am using LV PDA module 8.2 to achieve this. My problem lies in finding the port number of the Virtual COM Port on the SBC. I need to connect a USB RF modem from Maxstream to this SBC and to talk to it using VISA. I have installed the required drivers from Maxstream for converting the USB port to a virtual COM PORT. What is a way to figure out the COM PORT number on a Windows CE device? For a PC, I can see the COM PORT in the device manager but I do not know how to find this in Windows CE. . Also, I have tried using "VISA Find resource" function ..it works on a PC but I do not get anything in the Win CE device.
Any help would be much appreciated.
-Shruti

Shruti,
Is there a way to verify that the Maxstream driver successfully provides you with this virtual COM port? Essentially, what I mean is that if you did not have LabVIEW on this device, how does Maxstream prove that their driver is functional? Does it come with additional software that would be used to configure the USB RF modem? In any case, we would want to try opening any terminal program (like the hyperterminal) to determine what ports are listed for communication. I hope this is useful for you. Please post back when you are able to give this a try. Thanks,
Mike D.

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Cheers
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Solved!
Go to Solution.

Halden,
It really sounds like you have a resource conflict. That occurs when two programs or parts of programs try to use the same device or port at the same time. Your Get Device Function probably tries to open a session with each port (as you increment the index). When it hits a port which is being used by the other driver, it cannot open the session and stops working? Have you examined the errors returned by each program? The VISA drivers will return an error when the port is in use. I do not know about your program or drivers, but I would expect some kind of error. Automatic error handling in LabVIEW will not catch errors from a driver if it does not translate them to LV error clusters. So do not count on automatic error handling, if you use it, to display all possible errors.
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Not enough memory error when disconnecting device on a virtual com port

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Please post any code suggestions as graphics as I don't have access to any version of LabView newer than 7.0.
Attachments:
SerialPortRead.png ‏22 KB

Jeff·Þ·Bohrer wrote:
First, there likley WAS human intervention that caused the GPS device to be removed. That wont happen when you lock the device inside a cabinet with the rest of the test system. Physical access control first! If someone goes and mucks with your experiment setup while its running, that's a "poor Labratory procedure" not a "new software requirement"
I think he was meaning to say without user intervention on the software side.
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Unable to create the bluetooth virtual COM port

Hi all
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→ Wenn Du eine Lösung auf Deine Frage erhalten hast, markiere diese bitte als gelöst - Hilfreiche Beiträge verdienen Kudos. Zögere nicht Kudos zu vergeben.

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Christian Loew, CLA
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Please tip your answer providers with kudos.
Any attached Code is provided As Is. It has not been tested or validated as a product, for use in a deployed application or system,
or for use in hazardous environments. You assume all risks for use of the Code and use of the Code is subject
to the Sample Code License Terms which can be found at: http://ni.com/samplecodelicense

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Problem related USB Virtual COM PORT using PDA module 8.2 on Windows CE

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