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Message-Id: <200707030002.44853.daniel.ritz@gmx.ch>
Date: Tue, 3 Jul 2007 00:02:44 +0200
From: Daniel Ritz <daniel.ritz@....ch>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Ondrej Zary <linux@...nbow-software.org>,
linux-kernel@...r.kernel.org
Subject: Fwd: [PATCH] IRTOUCHSYSTEMS support for usbtouchscreen
looks good.
Signed-off-by: Daniel Ritz <daniel.ritz@....ch>
--- forwarded message ---
Hello,
this patch adds support for IRTOUCHSYSTEMS (or UNITOP) infrared touchscreens.
The manufacturer (http://www.irtouch.com) provides only closed source drivers
for specific kernel versions (looks like GPL violation, btw.) which I haven't
even tried (as there's no chance that any of the modules could work with
2.6.22-rc kernel). They also don't provide any protocol specification.
So I made this code (attached) after observing the data stream with usbmon for
a while. If someone is interested in my observations, here are the results:
The touchscreen sends data in 8-byte packets.
BYTE 0 - unknown meaning, seen only one value: 0x54
BYTE 1 - unknown meaning, 3 lowest bits indicate touch state
values seen: 0x81, 0x82 or 0x83
bit 0 = set if the screen is touched and was not touched before (touch
bit 1 = set if the screen is touched and was touched (dragging)
bit 2 = set if the touch was ended (release)
BYTES 2 and 3 - X position, high-order-byte first, range = 0 to 0x0FFF
BYTES 4 and 5 - Y position, high-order-byte first, range = 0 to 0x0FFF
BYTE 6 - unknown meaning, seen only one value: 0xFF
BYTE 7 - unknown meaning, seen only one value: 0x00
Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
--
Ondrej Zary
View attachment "usbtouchscreen-add-irtouch.patch" of type "text/x-diff" (2722 bytes)
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