Specifications

Chapter 7 - CTKERN CARROLL TOUCH
7-6 Touch System Programmer’s Guide
active area is indicated by the striped area. The range of touch
coordinates that are returned by a touch within the touch active area is
indicated by the coordinate pairs at the upper left and lower right
corners of either the touch active area defined during calibration (the
inner rectangle) or the touch active area of the touch system (the outer
rectangle).
The examples all assume the following:
• A touch frame with 80 logical x-axis coordinates numbered 0 - 79,
and 60 logical y-axis coordinates numbered 0 - 59.
• Scaling parameters set to match a 640 x 480 VGA display.
Upper left x = 0
Upper left y = 0
Lower right x = 639
Lower right y = 479
• Touches at (5, 4) and (74, 55) for the upper left and lower right
corners, respectively, during calibration.
The numbers on the outside of the outer rectangle indicate the logical
touch coordinates along each axis.
Figure 7-2. Calibration Mode Fixed or Automatic and Scaling Mode
Fixed or Automatic
0
(0,0)
0
5
4
55
59
74 79
(639,479)