Matlab xPC target USB?

2012 5 24
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Hello folks,
If I am attempting to communicate with an external device such as a GPS (driver installed) and it shows up as a COM port on my computer even though it is hooked up via USB on the xPC target, can I still use the RS232 library from xPC target to read/write to the device?
Thank you, Rob

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Walter Roberson
Walter Roberson 2012-5-24

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USB virtual serial ports require a device driver in order to communicated with as serial ports. If your xPC includes the appropriate device driver then you can use the RS232 library.
I know that some USB support is being offered on xPC now, but I have not examined the documentation to find out whether USB serial ports are one of them.

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Robert
Robert 2012-5-24
Thank you Walter,
I have the device driver for Windows installed on my PC and it shows up as a COM port in device manager. Would that be sufficient or would I have to create my own driver for the xPC Target kernel?
Walter Roberson
Walter Roberson 2012-5-24
My understanding is that drivers for xPC are not MS Windows drivers, that you would need a specific driver. I am not certain on this point.
I should also backtrack, in that I do not know how the xPC RS232 library is implemented, so my "can use" should be "might perhaps be able to use".
Robert
Robert 2012-5-24
That is a question I have been asking myself also, whether or not MS Windows drivers are read by the xPC Target kernel. I assume they are, otherwise how can the xPC Target kernel detect devices on the motherboard such as Ethernet or USB.. Perhaps a xPC product employee can enlighten us?
Walter Roberson
Walter Roberson 2012-5-24
xPC has kernel drivers for a small number of Ethernet models, I believe. I have seen a few postings from people whose ethernet board was not one of the few listed.
Robert
Robert 2012-5-25
You are correct, I overlooked this fact. It looks like a virtual com port via USB is out of the question at the moment since I have little time to create a driver so I will resort to sending my GPS coordinates to an external micro-controller which will then be connected via RS232 to the target PC.
Walter Roberson
Walter Roberson 2012-5-25
Sometimes you gotta do what ya gotta do.

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