AMC OCTO User Manual page 33

Software interface
GPIO SETTINGS
In order to activate GPIO input or output "GPIO Enabled" setting should be set to
"On" position. These settings should be done for each input and output. In order
to save settings "Apply" button must be pressed before the going to configure
another GPIO channel, otherwise current settings will be lost. For finally saving
press "OK" before the leaving GPIO setting menu.
In main GPIO Settings window all the time are displaying two columns. "R.O"
column designed for setup GPIO outputs, "R.I" – for setup GPIO inputs.
31 USER MANUAL OCTO Digital signal processor
OCTO DSP has integrated general purpose
input/output interface, which features can
be programmed in GPIO settings menu.
There are 8 inputs with 3,3V voltage formed
by pull-up resistors inside DSP and 8 outputs
which can supply 3,3V at high level stage.
Maximum GPIO outputs current is 10mA.
Programed GPIO channels are displayed in
orange color inside settings window while
current selected channel is marked with
blue edges.
GPIO OUTPUT SETTINGS R.O
In case if GPIO outputs are not programed
or programed conditions do not match
current DSP situation GPIO output level is
in low stage (output voltage - 0V). In case if
conditions match the programed settings
output level became high (output voltage
- 3,3V). "Output level type" allows invert
output stage. OCTO have choices to control
GPIO outputs by following DSP parameters:
Loaded scene, Input/output audio level,
Individual Input/output, mute status and by
the whole system mute status.
All these choices can be selectable in "Display Type" window. Before the starting
configuration one of the 8 GPIO outputs must be selected in R.O column.
Below is listed common parameters for GPIO output settings.
GPIO Channel – displays selected GPIO output.
GPIO Enabled - Allows enable or disable GPIO function in selected GPIO output.
Display Type – GPIO control scenario, the reason for which GPIO outputs will be
triggered.
Out level type – Inverts GPIO output. "Output low, no output high" is inverter
output, If output is triggered output voltage – 0V.
"Output High, no output low" is not inverter output, If output is triggered
output voltage – 3,3V .