[time-nuts] Tbolt temperature sensor

[Mark Sims]

I found this bit 'o code for reading the DS1620 temperature sensor chip.  The comments at the beginning explain what is probably going on with the newer Thunderbolts.  Trimble is apparently doing the "old style" register reads and cannot access the high resolution counter register in the newer DS1620 chips.

http://www.hawo.stw.uni-erlangen.de/misc/temperatur/dstempd.c


Also the older chips returned a (temperature dependent) divisor value that could apparently yield around 0.01C resolution.  The newer chips return a divisor that is fixed at 16...  0.0625C resolution.



_________________________________________________________________
See how Windows Mobile brings your life together—at home, work, or on the go.
http://clk.atdmt.com/MRT/go/msnnkwxp1020093182mrt/direct/01/