[Tinyos-help] backoff delay cc2420

[Greg Hackmann]

salvatore galati wrote:
> 3) If I install my application in a telosb mote with "make telosb 
> install" there will be the same problem caused by backoff time or i can set
> a time to send a packet via Radio = 4ms (for example)  and be sure that 
> a packet will be sent via Radio in less than 4ms?
> 
> 4) is there a way to totally delete backoff time or set backoff time to 
> a const value bounded between 0,1---->0,5 milliseconds? ( i see that 
> Backoff periods are set
> in /opt/tinyos-2.x/tos/chips/cc2420/CC2420.h , i try to set them to a 
> const value =1 but in Tossim simulation there is the same problem 
> (message sent in variable time of 3--->12 ms))

TOSSIM 2.0 has its own radio stack, so changing CC2420.h won't affect 
simulations.

If you want to tune TinyOS's backoff behavior on real mote hardware, you 
can use the RadioBackoff interface from CC2420ActiveMessageC.

Greg Hackmann