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From: Thad Smith on 4 May 2008 10:46
Tom�s � h�ilidhe wrote:
> On May 3, 3:19 pm, rickman <gnu...(a)gmail.com> wrote:
>
>> Why can't you just measure it? As soon as the CPU start executing
>> code, toggle a pin from low to high to low. No matter what state the
>> pin was before initialization, you will get an edge from this
>> sequence.
>
> My stopwatch only measures accurate to a tenth of a second, plus my
> reflexes aren't quick enough to stop it accurately.
>
> Seriously though what kind of device would I use to measure this? I'd
> need it to start measuring from when power was applied and get it to
> mark when the pin goes high.

My primary debugging tool is a digital oscilloscope. For you application
the trigger is CPU power and the other channel is your toggle pin.

--
Thad
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