From: Chris Brannon <chris@the-brannons.com>
To: speakup@linux-speakup.org
Subject: Re: USB synths
Date: Fri, 11 Mar 2016 14:17:49 -0800 [thread overview]
Message-ID: <87wpp8ek1e.fsf@mushroom.localdomain> (raw)
In-Reply-To: <56E32522.9000102@math.wisc.edu> (John G. Heim's message of "Fri, 11 Mar 2016 14:05:54 -0600")
John G Heim <jheim@math.wisc.edu> writes:
> The udev system isn't going to recognize a Tripletalk speech synth. It
> must be loading some generic device driver and even though the file
> has read/write permissions, you can't actually write to it.
The kernel provides a device node for each of your USB devices, but you
aren't really supposed to interact with those using the standard Unix
utilities. They're used by libusb, which makes it possible to drive
USB devices directly from user space. For instance, sane's USB scanner
drivers use libusb, and libusb communicates with the kernel via device nodes
under /dev/bus/usb. I don't know much more about how libusb works
internally. My understanding is kind of sketchy.
So what I'm saying is that those device nodes are only of interest if
you wanted to write a user-space programm using libusb to directly
interact with the TripleTalk.
-- Chris
next prev parent reply other threads:[~ UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
Help with serial synths in 4.X kernels Tony Baechler
` John G Heim
` Al Sten-Clanton
` Tony Baechler
` covici
` John G Heim
` covici
` Karen Lewellen
` John G Heim
` covici
` John G Heim
` covici
` Karen Lewellen
` John G Heim
` Karen Lewellen
` John G Heim
` responsibility for speakup, was: " Gregory Nowak
` Scott Henning
` Al Sten-Clanton
` John G Heim
` Jude DaShiell
` John G Heim
` covici
` Tony Baechler
` covici
` Samuel Thibault
` covici
` Samuel Thibault
` John G Heim
` Samuel Thibault
` John G Heim
` Samuel Thibault
[not found] ` <56E2D7CB.4030005@math.wisc.edu>
[not found] ` <20160311162115.GU10620@var.bordeaux.inria.fr>
` USB synths (was: serial synths in 4.X kernels) John G Heim
` Samuel Thibault
` USB synths John G Heim
` Chris Brannon [this message]
` John G. Heim
` Chris Brannon
` Help with serial synths in 4.X kernels covici
` Samuel Thibault
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