I'm sorry that this isn't more transparent.
There are 2 main sources of documentation, OWFS (this project) and
Dallas/Maxim.
OWFS: There are man pages for each device explaining (to some extent) all
the device properties (file entries). It's found in the downloaded code, and
also on the web site. For instance, about the DS18S20 trim see:
http://owfs.org/index.php?page=ds18s20
Maxim: For the more esoteric options of a chip, the original datasheets are
the best source. In general, I keep the same property name as the datasheet,
to make it more obvious. For example the DS2438 CA, EE, IAD are documented
on page 15 of the DS2438 datasheet:
http://datasheets.maxim-ic.com/en/ds/DS2438.pdf
Of course you can read the source code, but I hope it won't be necessary.
It's hard for me to present this background information to a new user, I'm
too immersed. If anyone can write a primer, I'll gladly post it.
Paul Alfille
On Thu, Oct 29, 2009 at 2:03 AM, Mr Doug - <dsc3...@yahoo.com> wrote:
> I am a little confused about how and why items appear in the chip
> directories. As a for instance in the DS18S20 directory (10.xxxx) where does
> trim and trim blanket come from? I do not see anything in the Maxim docs
> about that. Now should they be set? What is the method for calibrating
> temperature?
>
> For the DS2438 (26.xxxx) there are check boxes CA, EE, IAD, settings trim
> and udate. Where is this all documented?
>
> There is a humidity reading and I do have the hobby boards temp/hum/solar
> board but how does owfs make the calculation and is it trim-able. There are
> two sensor? numbers listed HIH4000, HTM1735. The hobby board is an HIH3610.
>
> So without reading through the source code how does one understand all
> this?
>
>
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