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

[Philip Levis]

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