linux-kernel - Re: [RFC] Should we create a raw input interface for IR's ? - Was: Re: [PATCH 1/3 v2] lirc core device driver infrastructure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4B0EEC21.9010001@redhat.com>
Date:	Thu, 26 Nov 2009 18:59:13 -0200
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Christoph Bartelmus <lirc@...telmus.de>
CC:	dmitry.torokhov@...il.com, j@...nau.net, jarod@...hat.com,
	khc@...waw.pl, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	superm1@...ntu.com
Subject: Re: [RFC] Should we create a raw input interface for IR's ? - Was:
 Re: [PATCH 1/3 v2] lirc core device driver infrastructure

Christoph Bartelmus wrote:
> Hi Mauro,
> 
> on 26 Nov 09 at 10:36, Mauro Carvalho Chehab wrote:
> [...]
>> lircd supports input layer interface. Yet, patch 3/3 exports both devices
>> that support only pulse/space raw mode and devices that generate scan
>> codes via the raw mode interface. It does it by generating artificial
>> pulse codes.
> 
> Nonsense! There's no generation of artificial pulse codes in the drivers.
> The LIRC interface includes ways to pass decoded IR codes of arbitrary  
> length to userspace.

I might have got wrong then a comment in the middle of the 
imon_incoming_packet() of the SoundGraph iMON IR patch:

+	/*
+	 * Translate received data to pulse and space lengths.
+	 * Received data is active low, i.e. pulses are 0 and
+	 * spaces are 1.
+	 *
+	 * My original algorithm was essentially similar to
+	 * Changwoo Ryu's with the exception that he switched
+	 * the incoming bits to active high and also fed an
+	 * initial space to LIRC at the start of a new sequence
+	 * if the previous bit was a pulse.
+	 *
+	 * I've decided to adopt his algorithm.
+	 */

Cheers,
Mauro.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/