Subject: Re: [RFC v2] Another approach to IR
From: Andy Walls <awalls@radix.net>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Jarod Wilson <jarod@wilsonet.com>, Jarod Wilson <jarod@redhat.com>,
       Jon Smirl <jonsmirl@gmail.com>,
       Mauro Carvalho Chehab <mchehab@redhat.com>,
       Devin Heitmueller <dheitmueller@kernellabs.com>,
       Maxim Levitsky <maximlevitsky@gmail.com>, j@jannau.net, khc@pm.waw.pl,
       linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
       linux-media@vger.kernel.org, lirc-list@lists.sourceforge.net,
       superm1@ubuntu.com, Christoph Bartelmus <lirc@bartelmus.de>
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Date: Wed, 02 Dec 2009 20:19:39 -0500
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On Wed, 2009-12-02 at 12:14 -0800, Dmitry Torokhov wrote:
> On Wed, Dec 02, 2009 at 03:04:30PM -0500, Jarod Wilson wrote:


> Didn't Jon posted his example whith programmable remote pretending to be
> several separate remotes (depending on the mode of operation) so that
> several devices/applications can be controlled without interfering with
> each other?


There are a few features that can be used to distinguish remotes:

1. Carrier freq
2. Protocol (NEC, Sony, JVC, RC-5...)
3. Protocol variant (NEC original, NEC with extended addresses,
		     RC-5, RC-5 with exteneded commands,
		     RC-6 Mode 0, RC-6 Mode 6B, ...)
4. System # or Address sent by the remote (16 bits max, I think)
5. Set of possible Commands or Information words sent from the remote.
6. Pulse width deviation from standard (mean, variance)


1, 5, and 6 are really a sort of "fingerprint" and likely not worth the
effort, even if you have hardware that can measure things with some
accuracy.

Regards,
Andy

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