Specifications

CARROLL TOUCH Appendix A - Smart-Frame Protocol Command Reference

Touch System Programmer’s Guide A-33

Scan_Reporting (22H) (”)

Command Description

When the reporting method is set to scan reporting by sending the

Scan_Reporting (22H) command, a list of the physical beams that are

interrupted in each axis is reported to the host. Scan reporting is

primarily used for testing and diagnostic purposes, or to obtain raw

beam interruption data for custom touch recognition algorithms. The

first physical beam on each axis is numbered zero (0) with the origin

located in the upper left corner. Touch modes are not recognized when

the reporting method is set to scan reporting. The scan reporting method

is not supported by the software-based controller (SBC).

Report Format

The Scan Report has the following format:

FB Nx Xa, Xb, Xc, ..., Xn Ny Ya, Yb, Yc, ..., Yn

FB = Start of Scan Report.

Nx = Number of x-axis physical beams interrupted.

Xa, ..., Xn

= List of x-axis physical beams interrupted.

Ny = Number of y-axis beams physical beams interrupted.

Ya, ..., Yn

= List of y-axis physical beams interrupted.

FF = End of report.

Example

An example of a Scan Report is:

FB 02 04 05 04 07 08 09 0A FF

It indicates that two x-axis physical beams (beams 4 and 5) are

interrupted and that four y-axis physical beams (beams 7, 8, 9 and A)

are interrupted.