Messages in this thread | | | Subject | RE: Touchscreen hardware hacking/driver hacking. | Date | Tue, 17 Oct 2006 16:28:39 -0500 | From | <> |
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In my many rounds of research on this, I'm pretty sure that this is the same setup as the lifebook. Wether the implementation is the same, is a matter of conjecture as long as I can't see the device.
Both of you suggested checking the PS/2 under windows, unfortunatly I know of no "sniffer" type drivers or apps to listen directly on a logical PS/2 interface. If you know where I can find something like that that would be of more help than anything at this point.
-----Original Message----- From: dmitry.torokhov@gmail.com [mailto:dmitry.torokhov@gmail.com] On Behalf Of Dmitry Torokhov Sent: Tuesday, October 17, 2006 4:12 PM To: Chandler, Greg Cc: linux-kernel@vger.kernel.org; linux-input@atrey.karlin.mff.cuni.cz Subject: Re: Touchscreen hardware hacking/driver hacking.
On 10/17/06, Greg.Chandler@wellsfargo.com <Greg.Chandler@wellsfargo.com> wrote: > > I'm working on a prototype Hitachi tablet, it uses a Fujitsu 4-wire > resistive touchscreen. {10.4" I think} I've found that windows-xp > embedded uses a generic ps/2 driver for the device. > > I've ripped this thing to pieces on several occasions looking for > chips to help the porting, my problem is that I can not find the > analog-digital converter for this thing. The connector goes to a > surface mount header on an 8 layer board. > I loose the traces almost instantly. Given that I can't find the > converter anywhere what should I do next? > > I've done my homework and found that this HAS to be either serial or > usb attached according to Fujitsu. > Aparently it's neither. There are no unknown USB devices {or known > matching}, and there is no activity on the single serial port on the > system. Since the windows driver uses PS/2 as the interface I have a > horrible feeling this thing has an interpretation layer that makes it > a > PS/2 mouse, and that may or may not royally be a nightmare. >
The touchscreen might need a "magic knock" to activate. You might try to see what data wondows driver sends to PS/2 port.
Also check of Lifebook touchscreen protocol will work for you. You will need to adjust DMI table in drivers/input/mouse/lifebook.c/
> I would have posted this to a different group but there is no "input" > mailing list. >
linux-input@atrey.karlin.mff.cuni.cz
But you must be subscribed to post otherwise list just drops your mails on the floor.
-- Dmitry
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