Re: Q: How to detect which USx2y is connected?

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Hi Rui,

Am Dienstag, 13. Februar 2007 schrieb Rui Nuno Capela:
> Hi Karsten,
> 
> In my quest in completing us428control implementation, I'm now stumbling
> on a fundamental question regarding the number of tracks/channel-faders
> (per bank) each particular usx2y device supports. The question boils down
> to what is the actual numeric value of the y in the actual usx2y model
> name :)
> 
> In practice, I need to know which usx2y model is actually connected.
> 
> So, what is the best/deterministic way to detect (programmatically)
> whether us428control is connecting to a US224 (y=4, as mine) _or_ a US428
> (y=8, as yours) ?
> 
> Is snd_hwdep_info_get_name() expected to be the most correct method?

Yes, I fear. this gives the /proc/bus/usb/002/004 filename.
I just did cat /proc/bus/usb/004/005 > x
and check x with hexedit: the 1604 and 8001 is in there.
I don't know how to portably interpret a read from
/proc/bus/usb/004/005 though.

libusb seams to only give the product id (1604:800x) by iterating over 
all usb-devices.

Thanks, Karsten

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