Mouse/Keyboard Controller
Crestron
CNMK
12
•
Mouse/Keyboard Controller: CNMK
Operations Guide - DOC. 5699A
Signals interconnect the various devices and logic symbols that comprise a SIMPL
program. Signals can be one of three types: digital, analog, or serial. For any given
signal, the signal type is determined by its driving source. That is, if the symbol that
drives the signal has an analog output, then, by definition, the signal connected there
will be an analog signal.
For additional information, refer to Doc. 6120, Crestron SIMPL Windows Symbol
Guide. It may be downloaded from the Crestron website.
The following table lists functional descriptions for the CNMK inputs.
CNMK Input Signal Descriptions
SIGNAL TYPE AND NAME
DESCRIPTION
Serial input: <
mouse$
> The
<
mouse$
> input sends mouse commands
to the PC, and is usually driven by the <
data
>
output of the Crestron CNWM RF remote, or by
the <
mouse$
> output of a Mouse Simulator
symbol. The CNWM has buttons for right-clicks
and left-clicks, as well as a pressure sensitive
thumb pad that controls the position of the
cursor. Similarly, the inputs of the Mouse
Simulator symbol generate right-click and left-
click commands and also control the position of
the cursor.
Serial input: <
keyout$
>
The <
keyout$
> input sends keyboard
commands to the PC. Here the data must be
converted into
keyboard scan code
before being
sent to the PC. (Refer to the Appendix.)
A keyboard scan code is a code number
transmitted to an IBM or compatible computer
whenever a key is pressed or released. Each
key on the keyboard has a unique scan code.
This code is
not
the same as the ASCII code for
the letter, number, or symbol shown on the key;
it is a special identifier for the key itself and is
always the same for a particular key.
When a key is pressed (generating a "Make"
scan code) or released (generating a "Break"
scan code), the scan code is transmitted to the
PC, which translates the scan code into its
ASCII equivalent. Because a single key can
generate more than one character (lowercase a
and uppercase A, for example), the PC also
keeps track of the status of keys that change the
keyboard state, such as the Shift key or Num
Lock key, and takes them into account when
translating a scan code.
Uploading and Upgrading
NOTE:
Crestron recommends that you use the latest software and that each device
contains the latest firmware to take advantage of the most recently released features.
Please check the Crestron website (
http://www.crestron.com/updates
) for the latest
versions of software and firmware. New users are required to register to obtain
access to this site.