On Sun, Sep 18, 2011 at 03:30:22PM -0700, George Nychis wrote:
>  
> Hi Mariano, 
> 
> So, I've been reading through some of the code.  It looks like this is not
> implemented:
> 
> int contiki_maca_channel_clear(void);

Are you looking at the contikimac-oldcfg branch? That should have it.

> 
> What is exposed by the hardware? Is there a register that keeps an updated
> carrier power value in the current band?  That way a threshold can be placed
> against it?  


As far as we know, no. I'm using the CCA sequence provided by the MACA.

> 
> I guess i'm just looking for advice on the basic CCA building block locations,
> and then I can build carrier sense and exponential back off around them.

Check out that branch --- it has a start of what you need in
maca.c. see post_cca() and cca().

-Mar.


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