[Tinyos-help] Bug In Arithmetic Ops

[Christophe Braillon]

Are you sure that you have no warning like "non-atomic read or write"? 
It would be really surprising if the hardware or compiler had bugs on 
that kind of basic operation...

Federico Fiorentin a écrit :
> Bug In Arithmetic Ops
>
> I'm developing a synchronization algorithm for Tmote Sky in TinyOS2 
> with a Poller and 2 Clients.
> The poller sends periodically a Request Packet, and the clients reply it.
>
> In the Reply packet there's:
>  the Request Packet receive timestamp (TS) ,
>  a time value (TV) always inferior the timestamp
>  and them difference (TS - TV).
>
> I found out that the subtraction evaluated by the mote isn't always 
> correct, sometimes it diverge of 1,2,4,8.... it seems that the mote 
> doesn't calculate correctly when it's stressed.
>
> Any suggestion is welcome.
>
> Thanks,Regards.
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