Re: Can multiple applications (in linux) access same USB HID ?

[Robert H. <he...@de...>]

At Wed, 22 Aug 2012 14:41:25 +0000 (UTC) Dineshkumar <dsp...@gm...> wrote:

> 
> Can multiple applications i.e. different processes access same HID?
> I am using libusb1.0 for development.

Not normally.  I 'solved' that problem for a HID device I programmed
for, the PI Engineering's Rail Driver, by writing the USB interface
code as a deamon, which opens a socket and listens on it.  Multiple
user-programs can connect to the deamon and the deamon serves these
user-programs in a round-robin fashion.

The code is part of the Model Railroad System
(http://www.deepsoft.com/ModelRailroadSystem).  The code is a free
download (open source, GPL, etc.).  The current incarnation of the
deamon is coded in a mix of C++ (low-level libusb1 I/O code) and Tcl (upper
level server code). 


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-- 
Robert Heller             -- 978-544-6933 / he...@de...
Deepwoods Software        -- http://www.deepsoft.com/
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