[Tinyos-help] CCA value

[roberto pagliari]

it is the same of the rssi value, since they are compared in order to detect
other transmissions. By the way, the default value depends on your
filesystem version, and you can modify it by going to HPLCC2420ControlC, for
example (in version 1.1.7 the default value is -128)

On 7/3/07, Aleksandr N. Sadkov <axel at wl.unn.ru> wrote:
>
>  Unfortunately, I don't know exactly, there is no information about range
> in Datasheet.
>
> It's 8 bit value, and I guess it's same range as RSSI value.
>
>
>
> Regards, Aleksandr.
>
>
>
>
>
> wbr, Sadkov Aleksandr
>
> axel at wl.unn.ru
>
> www.sumkino.com
>
> www.wl.unn.ru
>   ------------------------------
>
> *From:* JeongKwanhee [mailto:khjeong at gist.ac.kr]
> *Sent:* Tuesday, July 03, 2007 1:38 PM
> *To:* 'Aleksandr N. Sadkov'
> *Cc:* tinyos-help at Millennium.Berkeley.EDU
> *Subject:* RE: [Tinyos-help] CCA value
>
>
>
> Hello
>
>
>
> I forgot it.
>
> I have one more question.
>
> What is range of CCA?
>
> I don't know the smallest reset value for CCA.
>
>
>
>
>
> *From:* Aleksandr N. Sadkov [mailto:axel at wl.unn.ru]
> *Sent:* Tuesday, July 03, 2007 6:18 PM
> *To:* 'JeongKwanhee'
> *Cc:* tinyos-help at Millennium.Berkeley.EDU
> *Subject:* RE: [Tinyos-help] CCA value
>
>
>
> Hello,
>
>
>
> You forgot about -45 offset (is the same as for RSSI).
>
> The reset value for CCA is about -77 dBm.
>
>
>
> Regards, Aleksandr.
>
>
>
>
>
>
>
> wbr, Sadkov Aleksandr
>
> axel at wl.unn.ru
>
> www.sumkino.com
>
> www.wl.unn.ru
>   ------------------------------
>
> *From:* tinyos-help-bounces at millennium.berkeley.edu [mailto:
> tinyos-help-bounces at millennium.berkeley.edu] *On Behalf Of *JeongKwanhee
> *Sent:* Tuesday, July 03, 2007 10:15 AM
> *To:* 'roberto pagliari'
> *Cc:* tinyos-help at millennium.berkeley.edu
> *Subject:* RE: [Tinyos-help] CCA value
>
>
>
> Hello!
>
> I'm using the micaz to Tinyos 1.1.15 version.
>
> In cc2420data sheet, the default value of CCA_THR is -35.
>
>
>
>
>
> *From:* roberto pagliari [mailto:bobtinyos07 at gmail.com]
> *Sent:* Monday, July 02, 2007 11:56 PM
> *To:* JeongKwanhee
> *Cc:* tinyos-help at millennium.berkeley.edu
> *Subject:* Re: [Tinyos-help] CCA value
>
>
>
> which kind of platform and distribution are u using? In tinyos 1.0.7 the
> default value for micaz platform is -128. You should change it going to
> HPLCC2420Control.init()
>
> On 7/1/07, *JeongKwanhee* <khjeong at gist.ac.kr> wrote:
>
> Hello all!
>
>
>
> I knew CCA default value is -32.
>
> And I found CCA_MODE that decided whether data received or not.
>
> So, if I want to decide CCA Threshold, what I have to do?
>
> I think that I just change default value(E0). Is right???
>
>
>
> Plz, give me send many email whether it is right or not.
>
> Thank you.
>
>
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>
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