Upload
toradex
View
194
Download
2
Embed Size (px)
Citation preview
Overview of Touch Solutions offered by Toradex for Windows Embedded Compact
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 2Aug’15
CHAIRMANTouch 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
device’s response. Touch connects users to the device more
closely.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 3
Toradex offers different types of touch solutions for different interfaces.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 4
In this presentation, I will give you an overview of the touch solutions
offered by Toradex.
Resistive touch
The 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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 5
Capacitive touch
I2C/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 driver’s 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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 6
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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 7
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 8
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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 9
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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 10
Customers can fix the cursor area and virtual button area inside the active touch sensitive portion.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 11
It is a useful feature to have when products don’t 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
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 12
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 Touch
Some capacitive touch devices are interfaced with USB HID class mouse
protocol or custom protocol (touch).
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 13
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.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 14
Touch GesturesWindows 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 don’t support gestures.
To know more about Windows Embedded Compact supported gestures, refer here.
|www.toradex.com Toradex® is a registered trademark of Montadex GmbH 05/02/2023 15
Thank you!