Calibrate 3 Point - 3M Touch Screen Controller RX142 Reference Manual

3M™ MicroTouch™ Controller RX142 Reference Guide
Table 3 Firmware Commands for RX142 Development
Command

Calibrate 3 Point

Enter Sleep
Format Tablet
Get Controller
Number
Mode Stream
Null Command
Output Identity
Reset
Restore Defaults
Set Controller
Number
Unit Type
Calibrate 3 Point
Syntax: <SOH>C3<CR>
Response: <SOH>0<CR>
issued the controller responds with <SOH>0<CR>. After that, as the user touches each of
the three targets, the controller issues an <SOH>1<CR>.
<SOH>1<CR>
A valid touch coordinate (point) response ('1') signifies that a touch coordinate was
detected and is in range of the expected sensor target area. Three valid point responses
indicate successful calibration.
<SOH>0<CR>
An invalid touch coordinate (point) response ('0') is returned if the touch coordinate is
out of range. If either calibration point is invalid, the touch coordinates are discarded and
the calibration points remain unchanged from their previous values. If you receive a
negative response, you must start over again.
<SOH>2<CR>
An invalid touch coordinate (point) response ('2') is returned if the user did not touch the
target long enough to provide an accurate calibration point.
Description: Initiates an interactive 3-point calibration.
Code Description
C3 Initiates a 3-point calibration routine.
ES Controller enters low power mode.
FT Outputs the X/Y touch coordinate data in a five-byte
packet.
Q002 Used to determine a controller ID number for multiple
monitor applications.
MS Sends a continuous stream of X/Y coordinate data when
you touch the sensor.
Z Queries the controller and waits for a response.
OI Identifies the controller type and the firmware version.
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 calibration data is lost.
W002 Used to determine a controller ID number for multiple
monitor applications.
UT Returns controller unit type string and status.
Positive response to initializing the command. When C3 is first
Positive touch response.
Negative touch response.
Negative touch response.
3M Touch Systems, Inc. Proprietary Information
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