[Tinyos-devel] Message_t thoughts: prototypes

[Eric Decker]

On Sun, May 24, 2009 at 7:37 AM, Miklos Maroti <mmaroti at math.u-szeged.hu>wrote:

> Hi Eric,
>
> Since the message format for the serial is the same as for the radio,


Actually this isn't so.  The differences are minor but there.


> this switch can be implemented by a single metadata field. No problem


What would this switch in the metadata do?  One needs to be careful when
structuring things this way.  The switch I'm talking about radio vs. serial
is actually controlled by an event and doesn't associate itself with a
packet so what would the metadata control cell do?  Rather the determination
of what output port the packet should go out is made when the packet is
ready to go out.  The Send occurs and the final output header added to the
packet and then handed to the hardware.

eric

here as far as I can tell. In fact, I might do a serial stack for the
> IRIS platform using the exact same layers as I use for the radio, so
> at that point we could change the physical layer with a single switch.
>
> Miklos
>



-- 
Eric B. Decker
Senior (over 50 :-) Researcher
Autonomous Systems Lab
Jack Baskin School of Engineering
UCSC
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