SoundStructure Design Concepts
3 - 23
In this table, if all the pins are open, the get command described above will
return the value 7. If pin 2 is shorted to ground (value of 0), the value of the get
command will be 6 and so forth.
A control array of logic output pins may be specified with the same syntax as
in the previous example substituting digital_gpio_out for digital_gpio_in.
See Chapter 9 and Appendix A for more information on control array virtual
channels.
IR Receiver Virtual Channel
The IR receiver input on the SoundStructure device will respond with
acknowledgments when a valid IR signal is received. The first step towards
using the IR receiver is to define the IR receiver virtual channel. This may be
done with the following syntax:
vcdef “IR input” control ir_in 1
where 1 is the only physical channel that can be specified since there is only
one physical IR receiver channel.
Once a command from the Polycom HDX IR transmitter, a command acknowl-
edgement of the form:
val ir_key_press “IR Input” 58
will be generated by the SoundStructure device when a key that corresponds
to code 58 is pressed on the IR remote transmitter. The infrared remote control-
ler ID must be set to the factory default of 3 for the IR receiver to properly
identify the command.
See Chapter 9 for information about how to use the IR receiver with Sound-
Structure events.
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