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