Camera triggering config update for PX4 (#3690)

* Update param meta

* Implement trigger interface UI

src/AutoPilotPlugins/PX4/CameraComponent.qml

@@ -36,6 +36,7 @@ QGCView {
     property real _editFieldWidth:  ScreenTools.defaultFontPixelWidth * 16
 
     property Fact _camTriggerMode:  controller.getParameterFact(-1, "TRIG_MODE")
+    property Fact _camTriggerInterface:  controller.getParameterFact(-1, "TRIG_INTERFACE", false)
     property Fact _camTriggerPol:   controller.getParameterFact(-1, "TRIG_POLARITY", false) // Don't bitch about missing as these only exist if trigger mode is enabled
     property Fact _auxPins:         controller.getParameterFact(-1, "TRIG_PINS",     false) // Ditto
 
@@ -145,7 +146,6 @@ QGCView {
                             spacing:                    _margins * 0.5
                             anchors.verticalCenter:     parent.verticalCenter
                             Row {
-                                visible:                !controller.fixedWing
                                 QGCLabel {
                                     anchors.baseline:   camTrigCombo.baseline
                                     width:              _middleRowWidth
@@ -163,6 +163,24 @@ QGCView {
                                 }
                             }
                             Row {
+                                visible: _camTriggerInterface ? true : false
+                                QGCLabel {
+                                    anchors.baseline:   camInterfaceCombo.baseline
+                                    width:              _middleRowWidth
+                                    text:               qsTr("Trigger interface:")
+                                }
+                                FactComboBox {
+                                    id:                 camInterfaceCombo
+                                    width:              _editFieldWidth
+                                    fact:               _camTriggerInterface
+                                    indexModel:         false
+                                    enabled:            !_rebooting
+                                    onActivated: {
+                                        applyAndRestart.visible = true
+                                    }
+                                }
+                            }
+                            Row {
                                 QGCLabel {
                                     text:               qsTr("Time Interval")
                                     width:              _middleRowWidth
@@ -269,6 +287,7 @@ QGCView {
                         }
                         Item { width: _margins * 0.5; height: 1; }
                         Column {
+                            visible:                    !_camTriggerInterface || (_camTriggerInterface.value === 1)
                             spacing:                    _margins * 0.5
                             anchors.verticalCenter:     parent.verticalCenter
                             QGCLabel {

src/AutoPilotPlugins/PX4/CameraComponentSummary.qml

@@ -15,6 +15,7 @@ FactPanel {
     FactPanelController { id: controller; factPanel: panel }
 
     property Fact _camTriggerMode:  controller.getParameterFact(-1, "TRIG_MODE", false)
+    property Fact _camTriggerInterface:  controller.getParameterFact(-1, "TRIG_INTERFACE", false)
     property Fact _camTriggerPol:   controller.getParameterFact(-1, "TRIG_POLARITY", false) // Don't bitch about missing as these only exist if trigger mode is enabled
     property Fact _auxPins:         controller.getParameterFact(-1, "TRIG_PINS",     false) // Ditto
     property Fact _timeInterval:    controller.getParameterFact(-1, "TRIG_INTERVAL", false) // Ditto
@@ -24,6 +25,11 @@ FactPanel {
         anchors.fill:       parent
 
         VehicleSummaryRow {
+            labelText: qsTr("Trigger interface:")
+            valueText: _camTriggerInterface ? _camTriggerInterface.enumStringValue : ""
+        }
+
+        VehicleSummaryRow {
             labelText: qsTr("Trigger mode:")
             valueText: _camTriggerMode ? _camTriggerMode.enumStringValue : ""
         }

src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml

@@ -392,6 +392,16 @@ velocity</short_desc>
     </parameter>
   </group>
   <group name="Camera trigger">
+    <parameter default="2" name="TRIG_INTERFACE" type="INT32">
+      <short_desc>Camera trigger Interface</short_desc>
+      <long_desc>Selects the trigger interface</long_desc>
+      <reboot_required>true</reboot_required>
+      <scope>drivers/camera_trigger</scope>
+      <values>
+        <value code="1">GPIO</value>
+        <value code="2">Seagull MAP2 (PWM)</value>
+      </values>
+    </parameter>
     <parameter default="40.0" name="TRIG_INTERVAL" type="FLOAT">
       <short_desc>Camera trigger interval</short_desc>
       <long_desc>This parameter sets the time between two consecutive trigger events</long_desc>
@@ -435,7 +445,7 @@ velocity</short_desc>
         <value code="4">Distance, mission controlled</value>
       </values>
     </parameter>
-    <parameter default="12" name="TRIG_PINS" type="INT32">
+    <parameter default="6" name="TRIG_PINS" type="INT32">
       <short_desc>Camera trigger pin</short_desc>
       <long_desc>Selects which pin is used, ranges from 1 to 6 (AUX1-AUX6)</long_desc>
       <min>1</min>