[Tinyos-devel] tmote P3.6 / P3.7 direction

[Geoffrey Werner-Allen]

Good point; that's correct.

-gwa-

geoffrey werner-allen :: 617.694.7261 :: www.eecs.harvard.edu/~werner

On Wed, Jul 2, 2008 at 6:25 PM, Philip Levis <pal at cs.stanford.edu> wrote:

>
> On Jul 2, 2008, at 3:22 PM, Geoffrey Werner-Allen wrote:
>
>  Phil:
>>
>> IIRC on the TMote one of the USB power lines controls whether or not the
>> serial input buffer is active.  If it's active it's driving the line feeding
>> into Port 3.7 and if the port isn't configured to catch it, then you have
>> the port conflict causing unnecessary power consumption and possible lockup.
>>  Currently the serial stack sets up 3.7, so if its not included and the mote
>> is plugged in to USB, you have the problem.  I don't think the ordering of
>> reprogramming/plugging in matters, just the inclusion of the serial stack in
>> the running binary and whether or not the mote is plugged in to USB.  Does
>> that make sense?
>>
>
> It does; I was commenting on David's solution, which proposed sensing
> whether a mote was plugged in or not. So if a mote started not plugged in,
> but then was plugged in (with no serial stack), then it would leak current,
> right?
>
> Phil
>
>
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