[Nut-upsdev] USB HID Spec help (passing strings)

[Rob Groner]

No, just as a variable string descriptor.

By “variable string descriptor”, do you mean what is contained in the example in the App Note?  I’m just asking for clarification, in case variable string descriptor is something different than shown there.

The way they do the string descriptors in the example is how I have mine now.  They return a size and address, but it is to something that was defined at compile time.  I guess I’ve been fixated on that, so I don’t know if I can simply pass a different string that what was defined before.  And I don’t know how to handle something of an unknown size (though in my case, the MAX size of the serial number can be defined)

That’s why I was asking about the variable string descriptor...it sounds more like something where you can pass a string of any size and address, which would definitely be what I’m looking for.

Looking at the data being passed, I realized that battery.type is something else that I possibly won’t know until the code is running.  Our UPS can use different attached batteries, and will be able to discern what it is at runtime, and that’s when it would be able to report battery.type.

Thanks for the help Charles…that is a very good link to the Appnote considering you haven’t done PIC32 work.  ☺  My google skills failed me.


Rob Groner
Software Engineer Level II

RTD Embedded Technologies, Inc.
ISO 9001 and AS9100 Certified
Ph: +1 814-234-8087
www.rtd.com<http://www.rtd.com/>


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