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COM port listing


Graeme

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Hi all,

I have a requirement to generate a list of all COM ports present on the localhost. Twist is, the list should be in numerical order, not the alphabetical(ish) order that the VISA Find Resource function returns. I have a VI or two that does the job but, as ever, a bit clunky and prone to failure under some circumstances. Can't help feeling there's a neat way to do it, it's just that I can't see it. It would be great if a solution could cope with the VISA Find Resource function returning the raw VISA name (e.g. ASRL2::INSTR) or its machine alias (e.g. COM2).

In addition, asking the VISA Find Resource function to return ASRL?+::INSTR returns all COM ports but the parallel port (LPT1) too (ASRL10::INSTR). For the life of me I can't come up with a regular expression that excludes the parallel port. Thoughts most welcome.

Regards.

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