You can read the RSSI_VAL field in the RSSI register on the CC2420 using HPLCC2420.read command. You only want the lowest 8-bits of the return value. See the CC2420 datasheet for details on how to interpret this register value. The format is 2's complement and the value must be offset with a constant.
- Prabal On 2/28/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Hello i have being searching about reading the cca pin in cc2420, but i > don't understand something. I want to detect if in some instant(maybe > when something is being received) the channel is free or not. Bu the > problem is that when i look at the cca pin, it always return true. Is > there any other way to do this? What i want is use a chect timer that > checks always the energy in the channel and if it detects valid energy > it advises me. Bu t the cca pin seems not to work, o what cani do? i > have read that when a packet is received you can read a field with the > rssi value, but what i want is the energy in every instant not when the > apcket has being received. > Some help please. thanks a lot > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
