This application note explains how to calibrate two NextWindow touch
screens to work with an extended desktop - where the desktop spans across
two display screens, with the Windows task bar in the left-hand screen and
an extended working area in the right-hand screen.
Implementing interactive touch for the above configuration requires two
NextWindow 2403 touch overlays, which are equipped with both serial and USB
communications.
Extending the desktop across two monitors is simply achieved in Windows
"Display Properties" dialog.
Note: both monitors must have the same Screen Resolution settings.
The two touch screens are calibrated separately, one using USB
communications and the other using serial communications.
We will call the two touch screens "Touch Panel 1" and "Touch Panel 2" respectively.
| 1. |
Connect the power supply to Touch Panel 1 and then connect the USB cable. |
| 2. |
Carry out the simple four-point
Calibration procedure. |
| 1. |
Install NextWindow's
Touch+ Software,
making sure you select "Run serial runtime on Windows startup." |
| 2. |
Locate the Serial Runtime directory.
The default is here:
C:\Program Files\NextWindow\Touch+ #.#.#\Serial Runtime |
| 3. |
Create a text file called SerialRuntime.ini and enter the following lines:
[Comms]
Port=COM1
Baud=115200
HeartbeatInterval=60000
HeartbeatEnabled=1
[Main]
OffsetX=32767
OffsetY=0
[Log]
FileName=
Level=1
MaxSize=10240
Note the parameter OffsetX=32767 in the [Main] Section. This
pushes the calibration points for the serial connection over to the
extended screen.
If you are unsure about editing SerialRuntime.ini, contact
,
for instructions on editing this file for your particular application. |
| 4. |
Connect the serial cable from Touch Panel 2 to the computer. |
| 5. |
Run the SerialConfig program, select [Port Detect] and then click the
[Calibration] button to start the
Calibration
sequence for Touch Panel 2. |
This completes the calibration procedure. Now both monitors are touch
enabled.
