Problems Reading Accelerometer Device
simon.kagstrom at gmail.com
Wed Nov 26 21:04:20 CET 2008
On Wed, 26 Nov 2008 19:19:31 +0000
Andy Green <andy at openmoko.com> wrote:
> |> Strange,
> |> when I set the Accs to 8G I get what I want as you can see below.
> |> One measurement every 2,5 ms.
> | I'm a bit slow today :-)
> | What do you mean with setting the accelerometers to 8G? Were the
> | threshold zero before?
> I think he means the full scale setting which defaults to 2G but can
> be 8G. Threshold would be a nice explanation for these 30ms dropouts
> but when he sets it to 8G it's harder for him to meet a threshold
> since each step in the results is worth 72mG not 18 any more.
If the kernel is recent enough, the threshold is stored in mg and
scaled depending on what the "full scale" is set to. Probably this
isn't the problem anyway.
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