10
CVS4 Component Video Switch
CVS4 Command Reference
The CVS4 K.I.S.S.™ Command Reference
This section defines the K.I.S.S.™ commands that are available to the users of the CVS4.
Note: The CVS4 has been designed as somewhat of a drop in replacement for one of our previ-
ous products, the HDS4.2. As such, some CVS4 commands exist for backwards compatibility
with the HDS4.2. In such cases it will be indicated that these commands are specifically for
HDS4.2 compatibility and an alternative command should be used for new controller implemen-
tations. In most cases the newer commands will have better support for multiple output devices
(such as matrix switches), and using the newer commands will make your drivers easier to
update as our new products are released. It is our intent to keep the command set between our
products as similar as possible, in an effort to make updating drivers as easy as possible.
Error Response Codes
The following are the Error Response codes that can be returned by the CVS4.
!1<CR><LF>
Unrecognized command.
!2<CR><LF>
A parameter was out of range.
!3<CR><LF>
Syntax error, badly formed command.
!4<CR><LF>
Checksum or CRC-8 error.
!5<CR><LF>
Too many or too few parameters.
!6<CR><LF>
System busy cannot process command.
!7<CR><LF>
Buffer overflow.
And some more detailed descriptions of their meanings:
Error 1: The command given was not recognized as a CVS4 command. Commands are case
sensitive and in the CVS4, all commands are upper case.
Error 2: One of the parameters given was too large, or too small, the command will be ignored.
Error 3: Something was wrong with the command's syntax. There was possibly extra data at the
end of the line, or non-decimal data as part of a parameter. There cannot be whitespace before
or after a checksum or CRC-8 checkcode, or this error will be returned.
Error 4: The ';' or ':' character was used to indicate a Checksum or CRC-8 Checkcode was
appended to the command string, but the Checksum or CRC-8 Checkcode did not match the
calculated one. The command will be ingnored.
Error 5: The number of parameters given does not match the number allowed by this command.
Error 6: To prevent conflicts between the front panel Setup Mode and the serial port settings,
when the CVS4 is in the Setup Mode, many parameters become read only and any attempt at
writing them will return Error 6. The “Front Panel Button Emulation” command with button code
‘0’ can be used to exit the Setup Mode, at which point the command can be re-issued without an
Error 6 response.
