--- Lee Barker <iyasu@CABLENET-VA.COM> wrote:
> What I was trying to do was send the raw data back
> to the PC, then I would
> try the
> acceleration calculation as well as calibrating it.
> Right now I only get
> zeros or numbers
> that make no sense to me. Hopefully someone can
> point me in the right
> direction as
> to what I'm doing wrong.
>

My first suggestion is to break this down into small
chunks you can debug independently.  Many things
could go wrong on the path from accelerometer to PC.

I think the first thing to check is that you have the
accelerometer hooked up properly.  You can do this
without a PIC by using a DMM that can measure duty
cycle.  Connect the DMM to your circuit and tilt
the accelerometer along its axes.  The duty cycle
should react accordingly (as specified in the data
sheet).  If you can't measure duty cycle, you could
at least measure the voltage at the Xfilt/Yfilt pins
and see if they react as expected. (By the way, the
capacitors on the Xfilt/Yfilt pins are definitely
required for a meaningful duty cycle output).

In my experience, hooking up the accelerometer and
understanding what it was giving me was the hardest
part.  The firmware was comparatively easy after
that!


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