Typographic Conventions; Sintax Of Messages; Messages From Keyboard To Pc - Videotec DCZ Manuel D'instructions

Example: On a default DCZ keyboard, the
is represented by code 13, the
14, etc.
If the keyboard is rotated by 180°, the configuration
remains unaltered and there is no change from a PC
application point of view.
By changing the value associated to each key on the
lookup chart, it is possible to redefine its function and
to allow the user to use keys with the same value.

9.2 Typographic conventions

The following typographic conventions are used in
the protocol described below:
• [messages]: Transmitted message
• variable_parameter: Variable parameter
inside a message
• ±: Plus or minus sign.

9.3 Sintax of messages

The messages sent to and from the PC consist in
printable characters (from ASCII 32 to ASCII 127
codes, excluding ASCII 91 and 93) which are delimited
by brackets [ and ]:
• [ (ASCII 91) Open square bracket, STX start of
transmission
• Message text of variable length
• [ (ASCII 93) Closed square bracket, STX start of
transmission
Given the type of messages transmitted and the
quality of the USB communication, no checksum
system is foreseen.
Example: When the ESC
1, column 3) the default keyboard will transmit
[K+13]:
• [: Identifies the start of the message
• K+: Pressed key
• 13: Key lookup value (row 1, column 3)
• ]: Identifies the end of the message.
ESC
key
MONITOR key by
key is pressed (row

9.4 Messages from keyboard to PC

The DCZ keyboard transmits every event to the PC
and does not expect an acknowledge message.
The events are:
EVENT MESSAGE
[K+val]
Pressing of a
touch key
[K+val:shift]
Pressing of a
touch key +
shift
[K-val]
Release of a
touch key
[H+shift]
Pressing a
"shift" key
[H-shift]
Releasing a
"shift" key
[J±pp±tt±zz]
Movement of
the joystick,
[S±aa]
Movement of
the shuttle
[D+1]
Movement of
the jog
[D-1]
Movement of
the jog
Tab. 02
PARAMETERS
val: Value of the
key in the lookup
chart
val: Value of the
key in the lookup
chart
shift: Pressed
"shift" keys ('1' . . ' 8')
val: Value of the
key in the lookup
chart
shift: Number of
"shift" key ('1' . . ' 8')
shift: Number of
"shift" key ('1' . . ' 8')
±pp, ±tt, ±zz: Pan,
tilt, zoom position
-07..+07
±aa: Rotation angle
-70°..+70°
Clockwise rotation
by one click (10
clicks per turn
angle)
Counter clockwise
rotation by one
click (10 clicks per
turn angle)
13