[Tinyos-devel] Patches to FTSP and CC2420 for 32kHz sync and LPL functionality

[Philip Levis]

On Jun 17, 2009, at 3:35 PM, Thomas Schmid wrote:

> Hi Miklos,
>
> This was my first attempt at an LPL application using tinyos 2.x. And
> honestly, I got very confused about it. I don't understand why each
> and every component has to wire to the low power listening interface
> anyway. FTSP is a good example. It should work if the radio uses LPL
> or not. But in the current implementation, FTSP has to set the
> LPL_INTERVAL every time it sends a message. Shouldn't the LPL layer
> take care of this?
>
> For example, if LPL is enabled, every message should by default get
> the LPL_INTERVAL set as the RxSleepInterval. Is there any purpose on
> why this isn't that way? Or is it already like that, but I just didn't
> find the right line in the code?

Thomas,

You're right: it should, and it doesn't. net2 and core have talked  
back and forth a lot about how to do this, but no-one has yet had the  
activation energy to do it. But I think there's momentum now, and so  
I suspect it will appear soon in the tree.

Phil