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 > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
