[Tinyos Core WG] TEP 109

[Philip Levis]

On Dec 6, 2006, at 8:15 AM, Jan Hauer wrote:


>
> 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.

This change had to do with the earlier version stating something  
about the *meaning* of the values, not their range:

This document assumes that sensors return uninterpreted values of
arbitrary size or datatype. Conversion of sensor values to something
with actual physical meaning is beyond the scope of this document.

In particular, it precluded sensors returning engineering values, and  
made it impossible for higher-level abstractions to generate  
engineering values. Note the new text in entirety:

This document takes no position on the meaning of the values returned
by sensor drivers. They may be raw uninterpreted values or they may
have some physical meaning. If a driver returns uninterpreted values,
the driver may provide additional interfaces that would allow
higher-level clients to interpret the value properly.

Phil