[Tinyos-help] Send Data "Hello Wold"

[Eric Decker]

On Mon, Jan 12, 2009 at 11:17 AM, Michael Schippling <schip at santafe.edu>wrote:

> There "used to be" a pad/no-pad option especially for this.
> Are the nx_ types defined to always be no-pad?


I've looked at the code generated and the nx_types are defined as arrays of
uint8_t.  Not sure
how the pad no_pad used to work.  I suspect it is for multibyte objects such
as uint16_t etc.

But for the question originally asked int8_t were being asked about.

eric


>
> thx
> MS
>
> Eric Decker wrote:
>
>>
>>
>> On Mon, Jan 12, 2009 at 10:59 AM, Michael Schippling <schip at santafe.edu<mailto:
>> schip at santafe.edu>> wrote:
>>
>>    You could change datax to:  nx_uint8_t datax[14]
>>    and then use a string or array copy to set it.
>>    You've only got 28 or 29 bytes (depending on the
>>    TOS version and standard settings) to play with
>>    in your message, and the other fields add up to
>>    14 bytes already...or perhaps more if the int8's
>>    are padded -- in fact I would group those two
>>    int8's together in the hopes that the compiler
>>    will not pad them.
>>
>>
>> The compiler won't pad them. if they are bytes.
>>
>> eric
>>
>>
>


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