Visual Circuits H-DVP, User Manual

Page: 26 / 89

Using the HDCom Application
16
Serial Command Reference
Using HDCom, you can send serial commands to the H-DVP
server, and you can receive callbacks from the server when certain
events are completed. Commands are in ASCII text and are
terminated with a decimal 13 character (carriage return).
Commands are not case sensitive.
Serial commands include:
❏
Callbacks
❏
Playback commands
❏
Cross-channel synchronization commands
❏
Informational commands
Callbacks
The server will issue callbacks whenever certain events occur.
Callbacks allow serial controllers to repond to server conditions.
Serial controllers are responsible for parsing callbacks and
reponding appropriately.
Callbacks are in the following format:
&%
FDUG FKDQQHO
PHVVDJH
.
❏
FDUG
—The playback card
❏
FKDQQHO
—The channel on the playback card
❏
PHVVDJH
—A numerical message
The possible callback messages are listed in Table 4 on page 17.
NOTE
Card numbering starts at zero (i.e., the first card is
number 0, the second card is number 1). The
channel number is always 0.