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Subject: Re: IBM HDAPS, I need a tip.
From: Alejandro Bonilla Beeche <abonilla@linuxwireless.org>
Reply-To: abonilla@linuxwireless.org
To: linux-kernel@vger.kernel.org
Cc: hdaps devel <hdaps-devel@lists.sourceforge.net>,
       "'Yani Ioannou'" <yani.ioannou@gmail.com>, Dave Hansen <dave@sr71.net>
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Date: Sun, 31 Jul 2005 22:56:29 -0600
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Second Try... ;-)

Anyone? 

.Alejandro


On Sun, 2005-07-31 at 19:53 -0600, Alejandro Bonilla Beeche wrote:
> Hi Guys,
> 
> I hope you all aren't sick about the topic. I have a quick question...
> 
> Thanks to development of the driver from some nice guys, we are able to
> get data from the accelerometer. There is one problem. How do we
> calibrate the values that are outputed from the userspace? All PC's get
> a different value, and we can't really find the best solution. What is
> the scientific and smartest way to do this?
> 
> i.e. of the driver output from the userspace.
> abonilla@debian:~/hdaps/hdaps-dave-0.02
> $ ./ibm_hdaps_userspace /dev/ibm_hdaps 
> x_accel: 409
> y_accel: 528
>    temp: 47
>   temp2: 47
> unknown: 7
> 
> If I move the PC 45 deg right.(Looking from front the left side is
> higher)
> 
> km_activity (keybd) = 0
> km_activity (mouse) = 0
> x_accel: 396
> y_accel: 579
>    temp: 47
>   temp2: 47
> unknown: 7
> 
> 
> The thing is, people have different values, and I think they are also
> different depending on where they are.
> 
> Another question for this kernel inclusion (heh) Should we use Sysfs or
> should we use the userspace that outputs this data, else what is
> recomended?
> 
> Thanks in advance,
> 
> .Alejandro