Actually I was referring to this particular line of Adeel, "receiver sensor (another sensor) do not show second time receiption of the same packet".
On Sun, Sep 9, 2012 at 11:27 AM, JeongGil Ko <[email protected]> wrote: > Wasif, > > Sorry I thought you were talking to me :) > > -John > > > On Sep 9, 2012, at 6:25 PM, JeongGil Ko wrote: > > > You can always try to use a packet sniffer to see if packets are in the > air. Unlike what your email implies, I have not implemented the code and I > am not debugging anything. I am just suggesting solutions. > > > > -John > > > > On Sep 9, 2012, at 6:20 PM, wasif masood wrote: > > > >> > >> Also, I am not sure the way you are debugging it, did you make sure > that the second packet is not droped by the receiver due to duplicate > receive, in the CC2420Receive Component. > >> > >> > >> > >> On Sun, Sep 9, 2012 at 4:18 AM, JeongGil Ko <[email protected]> > wrote: > >> AJ, > >> > >> I don't have the CC2420 specs fully in my head right now but I would > check if the STXON strobe flushes the TXFIFO after packet transmissions. If > this is true, an additional STXON will do nothing. Again, you can try and > follow the state machine implemented in CC2420TransmitP.nc. > >> > >> -John > >> > >> > >> On Sep 9, 2012, at 10:25 AM, Adeel Javed wrote: > >> > >>> Hi John, > >>> > >>> Thanks for your guidance, I am actually implementing a sort of jammer > when a sensor receives any particular packet, it should start broadcasting > that same packet number of times (twice is just an example) so that > neighbours consider the channel busy and stay in silence. Now as you said > SPI resources must be acquired before second strobe command, it did that > and didn't load buffer because i read it that STXON strobe transmits the > last buffered frame. I am not sure where i am going wrong, i am clearing > CSN pin before making STXON and setting this pin after strobe command. > >>> > >>> Is there anything else i can do? any idea will be highly appreciated. > >>> > >>> Thank you again for your input. > >>> > >>> On Wed, Sep 5, 2012 at 9:22 AM, JeongGil (John) Ko < > [email protected]> wrote: > >>> AJ, > >>> > >>> Not sure exactly what you're trying to do here... Send the same packet > twice? In that case, have you tried loading the TXFIFO before the second > strobe command? Also, you need to make sure that your strobe has the > resources for the SPI before sending the strobe. If not your strobe, in > simple words, will not reach the radio. There is a state machine for the > radio that you need to keep in mind before (and after) issuing a strobe. If > the radio is not in the proper state the strobe will simple not work. > Probably looking at tos/chips/cc2420/transmit/CC2420TransmitP.nc may help. > >>> > >>> -John > >>> > >>> On Wed, Sep 5, 2012 at 1:22 PM, JeongGil (John) Ko < > [email protected]> wrote: > >>> AJ, > >>> > >>> Not sure exactly what you're trying to do here... Send the same packet > twice? In that case, have you tried loading the TXFIFO before the second > strobe command? Also, you need to make sure that your strobe has the > resources for the SPI before sending the strobe. If not your strobe, in > simple words, will not reach the radio. There is a state machine for the > radio that you need to keep in mind before (and after) issuing a strobe. If > the radio is not in the proper state the strobe will simple not work. > Probably looking at tos/chips/cc2420/transmit/CC2420TransmitP.nc may help. > >>> > >>> -John > >>> > >>> On Wed, Sep 5, 2012 at 11:51 AM, Adeel Javed <[email protected]> > wrote: > >>> Hi everyone, > >>> > >>> I am wondering why this explicit call to STXON strobe is not working. > As written in the theory call STXON.strobe() send the last packet saved in > the buffer. Now in the send.senddone() event function, when i write this > call this strobe cammand, receiver sensor (another sensor) do not show > second time receiption of the same packet. > >>> > >>> can any one guide me in this regard. Am i using this strobe command > correctly ( i have disabled CCA). > >>> > >>> Thank you. > >>> with regards, > >>> AJ > >>> > >>> _______________________________________________ > >>> Tinyos-help mailing list > >>> [email protected] > >>> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >>> > >>> > >>> > >>> -- > >>> JeongGil Ko, Ph.D. > >>> Researcher > >>> Electronics and Telecommunications Research Institute (ETRI) > >>> http://sites.google.com/site/jeonggilko/ > >>> > >>> -- > >>> JeongGil Ko, Ph.D. > >>> Researcher > >>> Electronics and Telecommunications Research Institute (ETRI) > >>> http://sites.google.com/site/jeonggilko/ > >>> > >>> > >>> > >> > >> > >> _______________________________________________ > >> Tinyos-help mailing list > >> [email protected] > >> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >> > >> > >> > >> -- > >> Wasif Masood > >> > > > > -- Wasif Masood
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