Hi, To be precise, my channel switch delay is defined as the interval from when CC2420Config.sync() is called to CC2420Config.syncDone() event is triggered.
On Mon, Sep 10, 2012 at 11:02 PM, Xiaohui Liu <[email protected]> wrote: > Hi everyone, > > I'm developing a protocol which requires fast switch between two channels. > But I find the channel switch delay varies significantly from 16 to 600 > jiffies, causing the sender and receiver out of sync. The major cause is > the non-deterministic delay to access the SPI bus, whose distribution is > long-tailed. Can anyone please share his/her experience on how to make > channel switch delay more deterministic? This may be a basic issue for > multi-channel protocols as discussed in related threads > here<http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2012-May/054737.html> > and > here<https://www.millennium.berkeley.edu/pipermail/tinyos-help/2010-October/048160.html> > . > > One way I'm trying is to circumvent the resource arbitration of SPI bus > since it is merely used to access cc2420 in TelosB as seen in the > schematic<http://webs.cs.berkeley.edu/tos/hardware/telos/telos-revb-2004-09-27.pdf> > . > > Any hint will be sincerely appreciated. > > Cheers, > -Xiaohui Liu > -- -Xiaohui Liu
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