[Tinyos Core WG] TEP 109

[Gilman Tolle]

That's a very good point.

I can't think of a good reason why the information needed to provide the 
DeviceMetadata interface would be hard to obtain - so, okay, I support making 
it a MUST instead of a SHOULD. Can someone else can show a situation in which 
it would be a hardship to provide this interface alongside the standard SIDs?

Gil

Philip Levis wrote:
> On Dec 6, 2006, at 9:17 AM, Gilman Tolle wrote:
> 
>> I agree that TEP109 should add the 'most significant bit' call to the 
>> DeviceMetadata interface, and say that all DemoSensor*C apps SHOULD 
>> provide DeviceMetadata.
>>
>> I'll change it.
> 
> If you want generic data-processing components to be able to use the SID 
> interfaces, then it MUST provide DeviceMetadata. Otherwise you cannot 
> perform any operations that optimize the information content of a set of 
> bits.
> 
> The original observation had been that the MUST for left shifting had to 
> be moved out of the SIDs TEP as they had reached down to the ADC where 
> it was no longer possible. The agreement was that this would move into 
> the sensorboards TEP. This is in the 8/16 notes.
> 
> Phil
>