Ah, ok I was not aware of that
How do you feel about the mini driver (per functionality) concept?
Owfs is probably already built in a somewhat similar manner for other
devices (temp. sensors perhaps)
-tmk
On Feb 24, 2010, at 3:28 AM, Paul Alfille <[email protected]>
wrote:
On Wed, Feb 24, 2010 at 4:15 AM, <[email protected]> wrote:
OWFS typically presents all of the possible functions of a device in
the directory for that device, eg take my DS2780: It has a high-
sensitivity ADC which can be used to measure tiny voltages. Those
tiny voltages can also be interpreted functionally, as a
thermocouple output, or as a direct voltage reading. The Vis, TypeJ,
TypeK, etc nodes are all presented, so it is clearly showing all of
the possible interpretations of the data. Same for the 'humidity'
node on some other types, which have ADC's on them.
By the same token, OWFS doesn't hide the PIO write functionality
when the pio pin is in input mode.
(I'm addressing just a small part of your note.)
In the future, OWFS will be a little more sophisticated in showing
properties that are not relevant. I've added a function to each
property that controls if the property is listed in the directory.
This can be based on information reported by the slave and cached
persistently for performance.
Clearly the slave has to report it's configuration. To my knowledge,
that only includes:
DS2406-based TAI8570 barometer
DS2438-based MutiSensor chips
uprocessor UVI ultraviolet meter
uprocessor BAE0910 multifunction
some slaves in development.
Unfortunately that does not include DS2438 humidity chips, DS2760
thermocouples, DS2408 LCD drivers, etc.
Paul Alfille
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