Specifications
44 Chapter 4 - SmartSet Tutorial
4095. For our example, we will want coordinates scaled to values of 1 to 80
horizontally and 1 to 25 vertically.
Select the Scaling submenu by pressing "S". Change the X Low value to 1, the X
High to 80, the Y Low to 1, and the Y High to 25.
Now return to the Touch Mode submenu and enable Scaling. The scaling values
are ignored until Scaling Mode is enabled.
On the Touch Testing screen, observe how the coordinates are scaled to 80x25.
The combination of calibration and scaling now make the touch coordinates match
the image coordinates. A touch on the touchscreen now reports the character
location on the image. This is the mode where the touchscreen data is most useful
to an application.
Axis Inversion
The coordinate scaling values can be signed numbers from -32767 to +32768. If
the low scale value is greater than the high value, software axis inversion is
indicated. Software axis inversion is performed after any automatic hardware axis
inversions directed by the calibration points. For example, the corrected hardware
origin may be the upper left, but on one application screen, 1st Quadrant
1000x1000 Cartesian Coordinates may be desired with the origin in the lower left.
Simply set the scaling values 0-999 and 999-0 for X and Y. The calibration points
do not need to be changed.
Each axis may also be inverted by selecting the Orientation command on the
Scaling submenu.
Saving the Setup
Once all controller parameters have been configured with the SMARTSET
program, the Load/Save Setup command may be used to load and save the settings
to disk and/or nonvolatile RAM (NVRAM).
Saving settings to NVRAM will change the controller's power-on defaults, unless
the controller is booting from jumper settings (J7 is installed).
Saving settings to disk will allow other controllers to be quickly programmed to
the identical settings.
Type "L" to jump to the Load/Save Setup submenu. Select Save for the Data
Direction, and To Disk for the Destination. Move the highlighting to Setup and
press [Enter]. The status line says it is creating or updating the "SmartSet
configuration file".