Carrol Touch TouchSystems CarrollTouch Prog, Programmer'S Manual, Page: 117 / 274

Appendix A - Smart-Frame Protocol Command Reference CARROLL TOUCH
A-8 Touch System Programmer’s Guide
Coordinate_Reporting (23H) (#)
Command Description
When the reporting method is set to coordinate reporting by sending the
Coordinate_Reporting (23H) command, the touch system uses
software interpolation to interpret the interrupted physical beam data
and find the center of the stylus.
The three types of coordinate reports are:
• Touch Coordinate Report.
• Add Exit Point Coordinate Report.
• Non-Contiguous Coordinate Report.
Touch modes are recognized when the reporting method is set to
coordinate reporting. The system default reporting method is
coordinate reporting.
Report Format
The current touch mode determines the type of report that is sent and
when it is sent.
The Touch Coordinate Report has the following format:
FE X Y FF
FE
= Start of Touch Coordinate Report.
X
= X-axis logical touch coordinate.
Y
= Y-axis logical touch coordinate.
FF
= End of report.
Non-Contiguous Coordinate Reports are issued whenever interrupted
beams are non-contiguous (not adjacent). Non-contiguous touches can
be caused by the presence of more than one stylus in the touch active
area at the same time; this occurs, for example, if you accidentally
break the touch active area with another portion of the stylus. The
Non-Contiguous Coordinate Report has the following format:
FC T FF
FC
= Start of Non-Contiguous Coordinate Report.