RTL-SDR bias tee. Implements #533

plugins/samplesource/rtlsdr/rtlsdrgui.cpp

@@ -449,6 +449,12 @@ void RTLSDRGui::on_sampleRateMode_toggled(bool checked)
     displaySampleRate();
 }
 
+void RTLSDRGui::on_biasT_stateChanged(int state)
+{
+	m_settings.m_biasTee = (state == Qt::Checked);
+	sendSettings();
+}
+
 void RTLSDRGui::updateHardware()
 {
     if (m_doApplySettings)

plugins/samplesource/rtlsdr/rtlsdrgui.h

@@ -97,6 +97,7 @@ private slots:
     void on_record_toggled(bool checked);
     void on_transverter_clicked();
     void on_sampleRateMode_toggled(bool checked);
+    void on_biasT_stateChanged(int state);
     void openDeviceSettingsDialog(const QPoint& p);
     void openFileRecordDialog(const QPoint& p);
 	void updateHardware();

plugins/samplesource/rtlsdr/rtlsdrgui.ui

@@ -243,7 +243,7 @@
      <item row="0" column="0">
       <widget class="QLabel" name="corrLabel">
        <property name="text">
-        <string>Auto corr</string>
+        <string>Auto</string>
        </property>
       </widget>
      </item>
@@ -260,7 +260,7 @@
        </property>
       </spacer>
      </item>
-     <item row="0" column="5">
+     <item row="0" column="6">
       <widget class="QComboBox" name="fcPos">
        <property name="maximumSize">
         <size>
@@ -291,14 +291,14 @@
        </item>
       </widget>
      </item>
-     <item row="0" column="4">
+     <item row="0" column="5">
       <widget class="QLabel" name="fcPosLabel">
        <property name="text">
         <string>Fp</string>
        </property>
       </widget>
      </item>
-     <item row="0" column="6">
+     <item row="0" column="7">
       <widget class="TransverterButton" name="transverter">
        <property name="maximumSize">
         <size>
@@ -317,6 +317,19 @@
        </property>
       </widget>
      </item>
+     <item row="0" column="4">
+      <widget class="QCheckBox" name="biasT">
+       <property name="toolTip">
+        <string>Activate antenna bias tee</string>
+       </property>
+       <property name="layoutDirection">
+        <enum>Qt::RightToLeft</enum>
+       </property>
+       <property name="text">
+        <string>Bias T</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>

plugins/samplesource/rtlsdr/rtlsdrinput.cpp

@@ -562,6 +562,20 @@ bool RTLSDRInput::applySettings(const RTLSDRSettings& settings, bool force)
         }
     }
 
+    if ((m_settings.m_biasTee != settings.m_biasTee) || force)
+    {
+        reverseAPIKeys.append("biasTee");
+
+        if(m_dev != 0)
+        {
+            if (rtlsdr_set_bias_tee(m_dev, settings.m_biasTee ? 1 : 0) != 0) {
+                qCritical("RTLSDRInput::applySettings: rtlsdr_set_bias_tee() failed");
+            } else {
+                qDebug("RTLSDRInput::applySettings: rtlsdr_set_bias_tee() to %d", settings.m_biasTee ? 1 : 0);
+            }
+        }
+    }
+
     if (settings.m_useReverseAPI)
     {
         bool fullUpdate = ((m_settings.m_useReverseAPI != settings.m_useReverseAPI) && settings.m_useReverseAPI) ||
@@ -676,6 +690,9 @@ void RTLSDRInput::webapiUpdateDeviceSettings(
     if (deviceSettingsKeys.contains("rfBandwidth")) {
         settings.m_rfBandwidth = response.getRtlSdrSettings()->getRfBandwidth();
     }
+    if (deviceSettingsKeys.contains("biasTee")) {
+        settings.m_biasTee = response.getRtlSdrSettings()->getBiasTee() != 0;
+    }
     if (deviceSettingsKeys.contains("fileRecordName")) {
         settings.m_fileRecordName = *response.getRtlSdrSettings()->getFileRecordName();
     }
@@ -708,6 +725,7 @@ void RTLSDRInput::webapiFormatDeviceSettings(SWGSDRangel::SWGDeviceSettings& res
     response.getRtlSdrSettings()->setLowSampleRate(settings.m_lowSampleRate ? 1 : 0);
     response.getRtlSdrSettings()->setNoModMode(settings.m_noModMode ? 1 : 0);
     response.getRtlSdrSettings()->setOffsetTuning(settings.m_offsetTuning ? 1 : 0);
+    response.getRtlSdrSettings()->setBiasTee(settings.m_biasTee ? 1 : 0);
     response.getRtlSdrSettings()->setTransverterDeltaFrequency(settings.m_transverterDeltaFrequency);
     response.getRtlSdrSettings()->setTransverterMode(settings.m_transverterMode ? 1 : 0);
     response.getRtlSdrSettings()->setRfBandwidth(settings.m_rfBandwidth);
@@ -870,6 +888,9 @@ void RTLSDRInput::webapiReverseSendSettings(QList<QString>& deviceSettingsKeys,
     if (deviceSettingsKeys.contains("rfBandwidth") || force) {
         swgRtlSdrSettings->setRfBandwidth(settings.m_rfBandwidth);
     }
+    if (deviceSettingsKeys.contains("biasTee") || force) {
+        swgRtlSdrSettings->setBiasTee(settings.m_biasTee ? 1 : 0);
+    }
     if (deviceSettingsKeys.contains("fileRecordName") || force) {
         swgRtlSdrSettings->setFileRecordName(new QString(settings.m_fileRecordName));
     }

plugins/samplesource/rtlsdr/rtlsdrsettings.cpp

@@ -43,6 +43,7 @@ void RTLSDRSettings::resetToDefaults()
 	m_rfBandwidth = 2500 * 1000; // Hz
 	m_fileRecordName = "";
 	m_offsetTuning = false;
+    m_biasTee = false;
     m_useReverseAPI = false;
     m_reverseAPIAddress = "127.0.0.1";
     m_reverseAPIPort = 8888;
@@ -72,6 +73,7 @@ QByteArray RTLSDRSettings::serialize() const
     s.writeU32(18, m_reverseAPIPort);
     s.writeU32(19, m_reverseAPIDeviceIndex);
     s.writeBool(20, m_iqOrder);
+    s.writeBool(21, m_biasTee);
 
 	return s.final();
 }
@@ -119,6 +121,7 @@ bool RTLSDRSettings::deserialize(const QByteArray& data)
         d.readU32(19, &utmp, 0);
         m_reverseAPIDeviceIndex = utmp > 99 ? 99 : utmp;
         d.readBool(20, &m_iqOrder, true);
+        d.readBool(21, &m_biasTee, false);
 
 		return true;
 	}

plugins/samplesource/rtlsdr/rtlsdrsettings.h

@@ -44,6 +44,7 @@ struct RTLSDRSettings {
 	quint32 m_rfBandwidth; //!< RF filter bandwidth in Hz
 	QString m_fileRecordName;
 	bool m_offsetTuning;
+    bool m_biasTee;
     bool m_useReverseAPI;
     QString m_reverseAPIAddress;
     uint16_t m_reverseAPIPort;