[Tinyos Core WG] TEP 109

[Gilman Tolle]

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.

Gil

Jan Hauer wrote:
>> 109 either needs to do one of things things:
>>   1) state that sensor readings are left-shifted
>>   2) state that the sensor readings are right shifted (no padding on
>> the right)
>>   3) Add a call to the DeviceMetadata interface that tells you the
>> most significant bit in addition to the number of significant bits.
> 
> TEP 109 currently "takes no position on the meaning of the values
> returned by sensor drivers" on HIL and I thought this also was our
> last agreement. On the other hand for some of the applications (Sense,
> Oscilloscope...) it would be quite useful to have a DeviceMetadata
> interface. I suggest to put one more sentence in the TEP saying that
> all (but only) DemoSensor[Now|Stream]C components SHOULD provide
> DeviceMetadata, and then the demo apps could show the most significant
> bits.
> 
> Jan
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