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8.5 Use in HID Joystick mode
When the keyboard in in JOYHID mode, it is
recognized as a standard 4-axis 32 key joystick.
According to the USB specifications (ref. USB HID
Usage Tables, ver1.12, paragraph 4.2 Axis Usages) the
axes are assigned by default as follows:
Pan: X axis
Tilt: Y axis
Zoom (rotation): Z axis
Shuttle ring (rotation): Rx axis
Jog dial (rotation): Not applicable.
On pressing a joystick key, the relative LED will light
up.
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21
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Fig. 06
It is possible to change both the number and position
of the joystick keys; follow the indications in the
chapter dedicated to the key lookup chart.
The functions of the joystick's keys are established
by the application. Refer to the relevant installer's
manual.
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9 VCOM communication
protocol
When the keyboard is in VCOM mode it
communicates with the PC via a simplified ASCII
protocol. Printable characters are transmitted and any
numbers are transmitted as strings (not as decimal or
hexadecimal bytes).
No flow of hardware or software communication is
managed.
The PC application will open the serial port which
corresponds to the connected keyboard (the
baudrate and serial port configuration are irrelevant)
and it transmits/receives on this channel.The
keyboard responds to every command given by
the PC with an acknowledge message. Messages
transmitted by the keyboard do not require
acknowledgement by the PC application.
9.1 Key and LED layout
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The DCZ keyboard manages a 72 key layout and the
corresponding LEDs (8 rows, each with 9 columns).
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Regardless of the actual number of keys available
and used by the operator, each key/ LED coordinate
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is always identified by the same 2 numbers: row (1..8)
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and column (1..9).
When a key is pressed and released it transmits a
lookup chart value.
The lookup chart default values correspond to the
logical coordinates for each key:
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Fig. 07
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