I am not sure where is this function. Where did you find that? Based on the cc2420 datasheet "CCA is valid when the receiver has been enabled for at least 8 symbol periods." Thus one can read the CCA signal from the CCA pin 8 symbol periods (128 us) after enabling reception.
2008/6/13 정관희 <[EMAIL PROTECTED]>: > I use cc2420 radio chip. So, I know it has a CCA pin. > What i'm saying, TOSH_READ_RADIO_CCA_PIN() checks whether CCA pin is > available or not. > That is, I want to confirm how to run this function through its code. > how do I do? > > --- Original Message --- > From : "Min Guo"<[EMAIL PROTECTED]> > To : "JeongKwanhee"<[EMAIL PROTECTED]> > Date : 2008/06/13 금요일 오후 8:44:05 > Subject : Re: [Tinyos-help] About TOSH_READ_RADIO_CCA_PIN() > > Which radio do you use? On cc2420 there is a CCA pin available. CCA > indicates whether the channel is clear or with energy, and surely the > neighborhood nodes affects if they are communicating in the same > channel. > > On Fri, Jun 13, 2008 at 10:34 AM, JeongKwanhee <[EMAIL PROTECTED]> wrote: >> Hello, all members of TinyOS >> >> >> >> In general TinyOS, TOSH_READ_RADIO_CCA_PIN() is able to use some function >> if >> we want to check the state of channel. >> >> But, I don't know how to calculate whether channel is clear or not. >> >> >> >> I just think that it compares to rssi and cca. >> >> But, in this case, I think it does not consider the interference of >> adjacent >> nodes. >> >> For example, SINR. >> >> >> >> So, I want to check TOSH_READ_RADIO_CCA_PIN() function, and then to fix >> this >> function. >> >> >> >> If you know about this, please contact to me. Thank you. >> >> >> >> _________________________________________________________ >> >> Kwanhee Jeong >> >> Tel: +82-62-970-3147 >> Cell: +82-16-387-6870 >> Fax: +82-62-970-2291 >> >> _________________________________________________________ >> >> >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
