Specifications

Touch Controllers Reference Guide34
Calibrate New Procedure
To use the CN command:
1. Enter the Calibrate New (CN) command.
The controller sends an acknowledgment of <SOH>0<CR>.
2. Touch the screen at a lower left target, which is located at the
corner of the video image.
The controller returns an acknowledgment. Refer to Table 7 for
the acknowledgment values for the format you are using. If the
acknowledgment is positive, continue to the next step. If the
acknowledgment is negative, repeat this step.
3. Touch the screen at an upper right target, which is located at the
corner of the video image.
The controller returns an acknowledgment. Refer to Table 7 for
the acknowledgment values for the format you are using. If the
acknowledgment is positive, calibration is complete. If the
acknowledgment is negative, repeat this step.
Touching the two valid calibration points results in a successful
calibration. If either calibration point is invalid, the calibration fails. If
the calibration fails, the controller returns to the factory default
calibration (that is, the controller ignores the user-defined coordinates
and sets the calibrated area to the factory default values).
Note:
The Calibrate New command does not send an error code if it
does not collect enough readings for a given point. Instead, the
command simply discards the point and waits for you to touch the
same point.
Response: A positive response indicates that the controller received a valid touch
coordinate (point) when the target was touched. A negative response
indicates that the touch point is out of range of the expected target
area. If you receive a negative response, try touching the target area
again.