linux-kernel - Re: [PATCH 0/4] Input: ABS2 and friends

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]

Date:	Tue, 17 Dec 2013 16:28:41 -0500
From:	simon@...gewell.org
To:	"David Herrmann" <dh.herrmann@...il.com>
Cc:	linux-input@...r.kernel.org,
	"Dmitry Torokhov" <dmitry.torokhov@...il.com>,
	"Jiri Kosina" <jkosina@...e.cz>,
	"Benjamin Tissoires" <benjamin.tissoires@...il.com>,
	"Peter Hutterer" <peter.hutterer@...-t.net>,
	"Antonio Ospite" <ospite@...denti.unina.it>,
	linux-kernel@...r.kernel.org, input-tools@...ts.freedesktop.org,
	"David Herrmann" <dh.herrmann@...il.com>
Subject: Re: [PATCH 0/4] Input: ABS2 and friends

> Hi
>
> This implements the recently discussed ABS2 API. It's working fine on my
> machine with libevdev. Comments welcome!

Just looking at the documentation file, I have a couple of suggestions.

1). Make a note on the direction of gravity wrt the example image. Ie what
which axis/value will be positive with the device laid flat/stationary on
a desk. Might just prevent some confusion later.

2). Calibration, Accels and Gyros are noisy in different ways. Gyros tend
to be wrong in the long term, giving some consistant bias which should be
calibrated out. Accels are noisy in the short term, but generally right
over a long period.

Am I correct that the event framework will provide time-stamping of data,
thus making computation of relative movements possible.

Simon

--
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/