7800 Multiframe Manual
7825DSK2-LG(-HD)(-3G) 3G/HD/SD Dual Downstream Keyer
VLPRO OPERATION
Revision 2.0
Page 4-17
4.8.2.
Configuring the GPI Inputs
The 7825DSK2-LG(-HD)(-3G) is fitted with 8 general purpose inputs (GPIs) that can be configured to
trigger 2 different actions -
On Closure
and
On Open
. For example, the
On Closure
event can be
used to load a preset and perform a transition to the Program Bus. The
On Open
event for the same
GPI can be used to load a different user preset and perform a transition to the Program Bus. For
each event you can configure a preset to load, transition to perform and logo to display.
GPI can also be configured using GPI script files, which are text-based files that can be programmed in
a text editor and sent to your unit by Overture™. The syntax is important as the script represents
programming code that will be executed when the allocated GPI trigger event occurs. There are 8 GPI
inputs. Each input has 2 events: close and open. You can program scripts for each of these 16 events.
If a script file is present on the flash file system then the unit will process the script when the event is
triggered. If the script file is not present when a GPI event is triggered, then the internal GPI menu
settings will be used. The internal GPI settings can reference media, and actions can be configured to
cause media to be brought in or out when the GPI is triggered. Note: GPI scripts referred to above are
distinct from playlist scripts. Playlist scripts can be configured in the Playlist Editor. For the purposes
of GPI configuration, a playlist script is considered to be a logo – you can associate a GPI action with a
playlist script explicitly in the GPI configuration menu (again, providing there is no gpi script file present
to override the GPI configuration).
The GPI script files are text files therefore they can be easily edited in notepad. They must be named
correctly in order to trigger. For example, a script named gpi_3_close would run when the third GPI is
closed. The full syntax and naming is documented in section 6 and section 10 Appendix A.
GPI CONTROL:
This option is used to select one of the GPI inputs (A to H) that will be configured
using the other menu items in the
GPI SETUP
menu branch.
The Open action section enables the user to configure the GPI Actions. There are 4 options that
configure the actions when the selected GPI closes (
CTransition
,
CLoad, CAction,
and
CLogo)
. There
are also 4 options that configure the actions when the selected GPI opens (
OTransition
,
OLoad,
OAction
, and
OLogo)
. For the sake of brevity in the manual, only the
On Close
event options will be
shown.
4.8.2.1.
Target Logo
The
Target Logo
drop down menu displays a list of logos available on the unit. The user can select a
target logo from this list.
4.8.2.2.
Configuring the Perform Transition Function
The
Perform Transition
option is used to select whether a transition will occur when the GPI is
closed to ground. The following items are available in the drop down menu:
NO:
If you do
not
want to perform a transition when the GPI is closed, select the
NO
item.
YES:
Select
YES
to perform a transition when the GPI is closed.
