EXII-7720SC 3M TOUCH SYSTEMS, EXII-7720SC Datasheet - Page 21

• Manufacturer Part Number: EXII-7720SC
• Manufacturer: 3M TOUCH SYSTEMS

Specifications of EXII-7720SC

• Operating Temperature (min): -40C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

EX II Controller Communications
Calibrate Extended
Syntax:
Description:
Command
Calibrate
Extended
Calibrate Raw
Diagnostic
Format Raw
Format Tablet
Mode Stream
Name
Null Command
Output Identity
Parameter Set
Reset
Restore Defaults
Unit Type Verify
Table 3 Firmware Commands for EX II Development
<SOH>CX<CR>
Note: This command should not be used when TouchWare or MT 7 software is being
used. The CX command will interfere with the auto orientation algorithm. To calibrate,
use the 2- or 4-point calibration in TouchWare or MT 7 software.
Initiates an interactive 2-point calibration.
During the calibration process, you define the active area of the touch screen by mapping
locations to an absolute X/Y coordinate system. You touch two target areas on the
screen. Touching the target areas sends the X/Y coordinates for those touch points to the
controller. The controller calculates all other touch points based on these two points.
The Calibrate Extended command sets the calibration targets (points) inward from the
corner of the video image. Setting the targets inward makes the calibration process easier
and more accurate.
Guidelines for Calibrate Extended
Here are several guidelines for using the Calibrate Extended command:
•
Code
CX
CR
DX
FR
FT
MS
NM
Z
OI
Ppds[b]
R
RD
UV
The controller uses the data immediately before liftoff to register a calibration touch.
Therefore, you can touch the screen, move your finger to the target, hold for a few
seconds, and then lift off. Instructing users to touch this way results in a more
accurate calibration.
Description
Initiates an interactive 2-point calibration.
Collects the raw X and Y coordinates before normal scaling, linearization, and
filtering process.
Determines if there is a problem with the touch screen.
Returns the signal level (amount of touch) of each of the four touch screen
corners in digital format.
Outputs the X/Y touch coordinate data in a five-byte packet. Preferred for current
development.
Sends a continuous stream of X/Y coordinate data when you touch the screen.
Returns a controller identifier string.
Queries the controller and waits for a response.
Identifies the controller type and the firmware version.
Lets you adjust the communication parameters (parity, data bits, and stop bits) of
the controller.
Initializes the hardware and the firmware, causes the controller to stop sending
data, and recalculates the environmental conditions.
Returns the controller to the factory default operating parameters. Note: the serial
port is reset to N81 format tablet and 2-point calibration is lost.
Identifies the touch screen controller on your system.
3M Touch Systems Proprietary Information
21