[Tinyos-help] RSSI

roberto pagliari bobtinyos07 at gmail.com
Tue Jul 3 12:09:16 PDT 2007


> The TOSH_READ_RADIO_CCA_PIN() can be used every time you issue a request
> to
> dispatch a packet, if the pin is active then you can go...

thank you marco, but what do you mean by "if the pin is active"? CCA_PIN
returns the result of the operation (RSSI > CCA), but in order to read the
RSSI, the radio, I guess, need 8 symbol periods. So, I think one should
control the RSSI_FLAG before that, isn it?

On 7/3/07, Aleksandr N. Sadkov <axel at wl.unn.ru> wrote:
>
> >
> >
> > On the base of what I understand for the CC2420,
> >
> > The TOSH_READ_RADIO_CCA_PIN() can be used every time you issue a request
> > to
> > dispatch a packet, if the pin is active then you can go...
> >
> > The RSSI value indicates if there is activity in the channel in order to
> > start
> > receiving a packet.
>
> What about the RSSI value for noise in this case?
>
> >
> > --marco.
>
>
>
> wbr, Sadkov Aleksandr
> axel at wl.unn.ru
> www.sumkino.com
> www.wl.unn.ru
>
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