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CVS4 Command Reference (Cont'd)
Query Status
In the Master / Slave mode of operation, this command is used to poll for any pending state
changes that are waiting to be read. By issuing this command and testing the returned bit-
mapped value, the controller can determine what has changed in the CVS4 since the last time it
was polled.
This command allows the controller to quickly poll the CVS4, using only one command, instead
of issuing a string of commands to check if the power state has changed, or if a new input has
been selected, a button pressed, etc.. The Query Status command is used to determine if any-
thing has changed, and then based on the results of the Query Status, only the query commands
needed are issued to read the new states of the CVS4.
Once the new state is read by issuing the proper query command, the associated flag wll be
reset.
Q ?
Q
Response String:
=Qflags
Where 'flags' is a bitmapped parameter:
Decimal Value
Bit Position
Name
PWR - 1=Power State has changed.
SEL - 1=Selection (Input / Output Mapping) has changed.
LIN - 1=Lighting Intensity Level Settings have changed.
BTN - 1=One or more buttons have been pressed.
IRR - 1=A new IR code has been received.
IRC - 1=New IR codes have been learned.
LMO - 1=Lighting Mode Settings have change.
CTL - 1=Control Settings have changed.
Note: For backward compatibility with the HDS4.2, there is no space after the command in the
response string.
Control Settings
Turn on and off operational modes of the CVS4.
This command allows control over the following:
•
Select the Master / Slave or Asynchronous modes of operations.
•
Enable / Disable the front panel switches.
Query for current flag values.
Query for current flag values.
+128 +64 +32 +16
7
6
5
4
CTL LMO IRC IRR BTN LIN SEL PWR
+8
+4
+2
+1
3
2
1
0
CVS4 Component Video Switch
1
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