Lab::Visa doesn't recognize USB instruments

[gpetrowitsch]

I have various USB instruments, which have resource names like

USB0::0x0957::0x4D18::MY54190007::INSTR

This is currently not recognized by Lab::Visa. However, if this is added to the _check_resource_name function in Visa.pm, all works fine for me.

elsif (
        $resname =~ /^USB[0-9]*::0x[0-9A-F]*::0x[0-9A-F]*::\w+(::INSTR)?$/    # USB INSTR
        ) {
        return 1;
    }

I don't know, if the regexp captures all valid USB resource names, but I can't improve this, because I don't know the rules for these resource names. Maybe you do...

Thanks & regards, Gerhard

[amba]

Dear Gerhard,

which VISA.pm do you mean? There is

• Lab::VISA
• Lab::Moose::Connection::VISA

legacy API (superseded by Lab::Moose::*):

• Lab::Bus::VISA
• Lab::Connection::VISA

For USB instruments the recommendation is Lab::Moose::Connection::VISA::USB.

[gpetrowitsch]

It's indeed the Lab::Bus::VISA. I got this up and running years ago on a quite early implementation of Lab::Measurement etc. with ActiveState Perl and was happy to get it working again now with the latest version on a Strawberry Perl.
I'll have to dig into my code, to find, where this is actually referred.