IBM HDAPS, I need a tip.

From: Alejandro Bonilla Beeche
Date: Sun Jul 31 2005 - 20:54:48 EST

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.
$ ./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

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

Thanks in advance,


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at