Touch Panel Communication Program
FP-570T User's Manual
5-3
5-3
Touch Panel Input Drivers
5-3-1 ATPH.EXE (Touch Panel Handler)
Input for the analog touch panel is carried out at a resolution of 1024 x 1024
dots, with the origin point located in the upper right corner of the panel. The
origin point of the display panel, however, is located in the upper left corner,
and its resolution is 640 x 480 dots.
Since the coordinates of the touch panel and the display panel do not match, the
ATPH.EXE (Touch panel handler) is used to convert touch panel input data to
match the both resolution and the origin point of the display panel, so that it can
pass the absolute input coordinates to the application software.
The following picture shows the relation between the touch panel and the display
panel coordinates.
Touch panel coordinates
Display
( 0,0 )
coordinates
( 0,0 )
Touch panel coordinates
(1023, 1023)
Display coordinates
(640, 480)
* The touch panel coordinates are converted to the display coordinates when
"ATPH.EXE" is activated.
