Neonode low-level access
pgf at laptop.org
Thu Nov 8 10:44:06 EST 2012
> How can I get at low-level data from the XO-4's touch screen in
> Linux? I'm thinking of the actual light levels of all the sensors
> around the edges.
access to more data is limited. the only events we get correlate pretty
directly to the X events you already see -- i.e., motion and touch.
it's possible to request other data, and i think all of those requests
can be issued from either OFW or linux.
for OFW, see http://wiki.laptop.org/go/XO_4_Touch_Testing for the
watch-fss and watch-fll commands. i think there are more as well, but
you're mainly interested in linux access. for linux, see the sysfs
files under /sys/kernel/debug/zforce/. there are also a few tuneables
under /sys/modules/zforce/parameters. most are self-explanatory, or
are quickly explained by a glance at the driver.
the driver's header file contains pretty much all the original information
from the docs we got:
> Certain apps could benefit from this - e.g. many of Neonode's own
> impressive demos could not be implemented using only the X11 events
> I get in Sugar.
can you elaborate?
paul fox, pgf at laptop.org
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