Light sensor on XO-1.75

[Sascha Silbe]

Excerpts from Paul Fox's message of Tue Aug 30 16:38:13 +0200 2011:

> yes, it's a nice trick.  i think it was discussed on this list last year.
> it's not very sensitive, but it can tell us the difference between full
> sun and not, which is really when we'd want to turn off the backlight.

Given that turning off the backlight usually isn't time critical, how
about triggering a measurement cycle only when user space actually reads
from the sysfs file? That would disturb regular operation of the nearby
LED only occasionally.

Sascha

-- 
http://sascha.silbe.org/
http://www.infra-silbe.de/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 490 bytes
Desc: not available
URL: <http://lists.laptop.org/pipermail/devel/attachments/20110902/29ded7a3/attachment.sig>