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3M™ MicroTouch™ Controller EX Dual Mode Reference Guide
Table 21. Firmware Commands for EX Serial Controller Development
Command
Calibrate
Extended
Calibrate Raw
Format Raw
Format Tablet
Mode Stream
Name
Null Command
Output Identity
Parameter Set
Reset
Restore Defaults
Unit Type Verify
Calibrate Extended
Syntax:
<SOH>CX<CR>
Note: This command should not be used when 3M™ MicroTouch™ Software is being
used. The CX command will interfere with the auto orientation algorithm. To calibrate,
use the calibration routine in 3M™ MicroTouch™ Software.
Description:
Initiates an interactive 2-point calibration.
During the calibration process, you define the active area of the sensor by mapping
locations to an absolute X/Y coordinate system. You touch two target areas on the
sensor. 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
Description
CX
Initiates an interactive 2-point calibration.
CR
Collects the raw X and Y coordinates before normal scaling,
linearization, and filtering process.
FR
Returns the signal level (amount of touch) of each of the four sensor
corners in digital format.
FT
Outputs the X/Y touch coordinate data in a five-byte packet.
Preferred for current development.
MS
Sends a continuous stream of X/Y coordinate data when you touch
the sensor.
NM
Returns a controller identifier string.
Z
Queries the controller and waits for a response.
OI
Identifies the controller type and the firmware version.
Ppds[b]
Lets you adjust the communication parameters (parity, data bits, and
stop bits) of the controller.
R
Initializes the hardware and the firmware, causes the controller to
stop sending data, and recalculates the environmental conditions.
RD
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.
UV
Identifies the touch controller on your system.
3M Touch Systems, Inc. Proprietary Information – TSD-40848A
33
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