Specifications

Glossary CARROLL TOUCH
GL-4 Touch System Programmer’s Guide
parity A parameter used for error-checking to ensure that the data that
was transmitted by the serial peripheral is identical to that
received by the computer, and vice versa. This is a
communication parameter used by the RS-232 controller.
physical beam A member of a set of beams that includes only the beams that
actually exist as an LED/phototransistor pair. See beam.
physical coordinates A coordinate system consisting of an x- and y-axis, each made up
of physical beams. The origin of the coordinate system is the
upper left corner of the display/touch screen.
physical frame size The actual number of opto-pairs (beams) that make up each axis
of the frame. See beam, logical frame size.
RS-232 controller See serial (RS-232) controller.
SBC See software-based controller (SBC).
SBC driver A software program that interfaces with the software-based
controller via a selectable I/O address and hardware interrupt and
with the application via TAPI.
scan reporting One of two methods that determines the form used to send data
from the touch system to the host. The touch system reports a list
of physical beams that are interrupted in each axis. See also
coordinate reporting.
scanning infrared
technology
See infrared touch technology.
serial (RS-232) controller A touch-system-independent, digital controller containing a
microprocessor. This controller requires an external +12V power
supply and communicates using a standard RS-232 serial port.
serial (RS-232) driver A software program that interfaces with the RS-232 controller, or
any other serially communicating CT controller that recognizes
the Smart-Frame protocol, via the RS-232 serial port, and with
the application program TAPI.
Smart-Frame A Carroll Touch touch frame with built-in serial (RS-232)
controller.
Smart-Frame Protocol A Carroll Touch proprietary set of commands and reports used to
communicate with Carroll Touch touch systems. This protocol is
used by virtually all Carroll Touch infrared touch systems.
Smart-Frame Protocol II A Carroll Touch proprietary set of commands and reports used to
communicate with Carroll Touch touch systems. This is an
enhancement of the Smart-Frame Protocol and supports both
guided acoustic wave and infrared touch systems.