Hey, Thanks Michael, it it strange though that I couldn't find this description elsewhere... So the CC2420 radio has it's own microcontroller which can parse the packets without the CPU intervention?
Arik ----- Original Message ----- From: Michael Schippling <[email protected]> Date: Thursday, October 29, 2009 18:48 Subject: Re: [Tinyos-help] TinyOS Receive mechanism To: Arik <[email protected]> Cc: [email protected] > I can't say as I know HOW it works but the general idea > is that the radio, in normal non-low-power use, listens > to the channel and grabs all messages. If the message > is received cleanly, belongs to the GroupID of the node, > and the destination matches it's NodeID or BCAST it is > passed to the AM dispatcher which calls the receive() > method defined in your config file for the message's AM > type value. > > Thus the packet "just pops out" into the right function. > > There isn't really a TOS scheduler as such. Tasks are executed > in a sequential manner, when one returns the next one is started. > Interrupts can break into a task and wreck havoc as they desire, > but tasks are not timesliced or anything fancy. > > MS > > Arik wrote: > > Hi all, > > > > > > > > Does anybody know how the Receive .receive works? > > > > I mean when I send a message, I use AMSend.Send(), but I don't > do the > > same for the receiver side. > > > > The packet just "pops out" into the Receive.receive(). > > > > Does TinyOS always listens to the channel when the radio is > not > > transmitting? > > > > What happens between AMSend.SendDone() and Receive.receive()? > > > > Where in general I look into TinyOS scheduler? > > > > > > > > Thanks, > > > > Arik > > > > > > --------------------------------------------------------------- > --------- > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > https://www.millennium.berkeley.edu/cgi- > bin/mailman/listinfo/tinyos-help >
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