On 18/12/06 17:53 +0100, Bert Freudenberg wrote: > On Dec 18, 2006, at 17:35 , Jordan Crouse wrote: > > >On 17/12/06 20:50 +0000, Chris Ball wrote: > >>>>On Sun, 17 Dec 2006 13:05:52, Dan Williams <[EMAIL PROTECTED]> said: > >> > >>>I can't remember if I ever got a straight answer on this. Is there > >>>a switch somewhere that we can access that indicates whether or not > >>>the laptop has been swiveled into ebook mode? > >> > >>This is <http://dev.laptop.org/ticket/467>. > >> > >>>Ideally, the switch would generate an interrupt which we could > >>>receive and automatically rotate the X display and switch to B&W > >>>mode when the keyboard is hidden [1]. It's not a great experience > >>>to have to expose a toggle somewhere if we can't figure out when > >>>we're in ebook mode, especially if we had to rely on activities to > >>>provide that toggle in their own UI. > >> > >>Yeah, it looks like we have the bit, but we don't want to poll it and > >>Quanta are blocking on us working out an interface for interrupts, > >>as in > >><http://dev.laptop.org/ticket/224>. Could we get someone to own > >>that? > > > >This reminds me - I've been meaning to ask how the switches > >actually work. > >There are two of them - one with the output marked PWR_BUT_in and > >the other > >with the output marked EB_MODE. I understand from the product > >datasheets > >that these are Hall Effect sensors, which in effect detect the > >presence > >of a magnetic field nearby. Sensor one (PWR_BUT_in) is located on the > >LCD side of the board at the top right near the notch. Sensor two > >(EB_MODE) is located on the processor side in the same location. From > >the position of sensor 1, I am assuming that it detects a lid > >opening, and > >the magnetic field is located in the base. I can't at all figure > >out where > >the magnet is for sensor 2, nor how it detects EB mode. > > > >So - long story short, where the heck are the magnets? :) > > When you turn the display around, wouldn't the second sensor then > come to rest near the same magnet? So you only need one magnet for both?
Doh - I'll bet thats it. So the sensor doesn't really indicate orientation, but rather that the screen is turned around. :( Still useful, but not for what we wanted. Jordan _______________________________________________ Devel mailing list [email protected] http://mailman.laptop.org/mailman/listinfo/devel
