Touch Solutions offered by Toradex for Windows Embedded Compact

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Touch is an exciting technology. Nowadays, touch
is a vital feature like keyboard/keypad, mouse,
etc. for any device. It has changed the way a
user interacts with the devices. The user can
sense the effect of their touch by gauging the
devices response. Touch connects users to the
device more closely.
CHAIRMAN
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Toradex offers different types of touch solutions
for different interfaces.
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In this presentation, I will give you an overview
of the touch solutions offered by
Toradex. Resistive touchThe Colibri and Apalis
computer modules come with an interface for
4-wire and 5-wire resistive touch screen. The
driver for this interface is already included in
our preinstalled Win CE/Linux standard images.
For more information, see Resistive Touch
Screen. Note 5-wire resistive touch is not
supported by all modules. Please refer the
specifications of the Colibri and Apalis families
to know about the supported resistive touch types.
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Capacitive touchI2C/SPI Capacitive multi-touch
device Most of the multi-touch or single-touch
capacitive touch devices support an I2C
interface, while the other type of devices come
with an SPI interface. The communication
protocols of these devices are not standardized,
so Toradex is not able to offer a capacitive
touch driver that runs out-of-the box with its
Board Support Packages. If you are developing a
multi-touch driver for a new touch controller,
then you need to have a good knowledge of Windows
CE stream drivers structure, use of the
platform builder, etc. So, creating a driver from
scratch requires a lot of time to be spent in
development and debugging.
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To simplify this process, Toradex has developed
an architecture, which we call, Capacitive
multi-touch solution. It helps you to easily
adapt our capacitive multi-touch driver to any
particular touch hardware. Unlike other device
drivers, the "Unified Multi-Touch driver" makes
no hardware access to the "Multi-touch device" or
any other hardware. The Unified Multi-Touch
driver is a part of the kernel.
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The "Multi-Touch Hardware Adaption" runs as an
application. It communicates with the
"Multi-Touch Device" with or without using
standard Toradex libraries. The main job of the
"Multi-Touch Hardware Adaption" is to read the
status and touch position from the "Multi-Touch"
device and send it to the "Unified Multi-Touch
Driver". The main advantage of this concept is
that the whole communication to the Multi-Touch
Device is implemented as an application. As the
source code example of "Multi-Touch Hardware
Adaption" is freely available, you can easily
adapt this example to another multi-touch device,
which you are using in your project. For more
detailed information see Multi-Touch Solution.
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Toradex also offers full-fledged Multi-Touch
Display Kits. You can use these kits to quickly
ramp up the development even before your actual
hardware is developed. With a little more added
effort, we can configure the multi-touch solution
to support only single-touch with
gestures. I2C/SPI Capacitive Single-Touch
Driver Please note We are no longer supporting
this driver. The capacitive single-touch driver
supports one-finger touch operation and emulates
mouse events in Windows CE. In contrast to a real
mouse, these drivers use absolute coordinates.
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Customers can fix the cursor area and virtual
button area inside the active touch sensitive
portion.
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• It is a useful feature to have when products
  dont need hardware buttons. A software button
  can easily be assigned to generate key codes with
  the press of a touch button, which is just like
  pressing a button on a real keyboard. These key
  events will be sent to GWES.
• Key features of the single-touch driver
• A touch inside the cursor area is transformed
  into a regular mouse event
• A touch inside the button area is handled in a
  special way
• Any touch outside the cursor and button area is
  ignored
• The coordinate system of the cursor area (origin
  and orientation) can be adjusted to match the
  display

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For more information about Capacitive Single
Touch driver, see here. Customers should use the
existing available drivers as-is available for
download from our developer website. If a
customer wants to customize our driver, please
contact our support team. We are providing very
limited support on the driver customization.
These drivers are not allowed to be ported to any
other Windows Embedded Compact versions and
modules. In the future, we intend to add these
features to the Multi-Touch Solution. USB HID
TouchSome capacitive touch devices are
interfaced with USB HID class mouse protocol or
custom protocol (touch).
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This hardware can send touch events to the
host/device as mouse protocol or the real touch
position. We have taken the mouse as base driver
and tweaked it to support the USB touch. You can
get more details on this here USB HID Touch.
This driver will get the touch positions from
hardware and then convert them to their relative
mouse events, which will then be sent to
GWES. Customers can buy USB-based touch devices
from the market and connect it directly to a
Toradex SOM plugged on a carrier board. The touch
should work instantly. If the touch is not
working, then follow the troubleshooting
procedure to make it work. If the problem
persists, contact the Toradex support team to get
dedicated support. As of now, USB HID Touch
supports single-touch. Multi-Touch support is not
yet available.
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Touch Gestures Windows Embedded Compact supports
gestures from Windows CE6 R3 onwards. Windows CE6
supports only single-touch with gestures. Windows
Embedded Compact 7 and 2013 support gestures that
are single-touch, dual-touch symmetrical, and
multi-touch with two contact points. The standard
gestures recognizer supports PAN, SCROLL, SELECT,
DOUBLE SELECT, and HOLD. Using external or
plug-in gesture recognizer, ZOOM, and ROTATE
gestures are possible. Gestures are supported
only by the Multi-touch Solutions offered by
Toradex. Capacitive Single-Touch driver and USB
HID Touch driver dont support gestures. To know
more about Windows Embedded Compact supported
gestures, refer here.
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Thank you!