#697 HackRF Bias T control.

src/main/java/io/github/dsheirer/source/tuner/hackrf/HackRFTunerConfiguration.java

@@ -33,6 +33,7 @@ public class HackRFTunerConfiguration extends TunerConfiguration
     private HackRFLNAGain mLNAGain = HackRFLNAGain.GAIN_16;  // We can see some signal at this gain
     private HackRFVGAGain mVGAGain = HackRFVGAGain.GAIN_16;  // We can see some signal at this gain
     private boolean mAmplifierEnabled = false;  //Probably should start off disabled
+    private boolean mBiasTEnabled = false;
 
     /**
      * Default constructor for JAXB
@@ -65,6 +66,23 @@ public class HackRFTunerConfiguration extends TunerConfiguration
         mAmplifierEnabled = enabled;
     }
 
+    /**
+     * Indicates if the Bias-T antenna port power is enabled.
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "bias_t")
+    public boolean isBiasT()
+    {
+        return mBiasTEnabled;
+    }
+
+    /**
+     * Enables or disables the Bias-T antenna port power.
+     */
+    public void setBiasT(boolean enabled)
+    {
+        mBiasTEnabled = enabled;
+    }
+
     @JacksonXmlProperty(isAttribute = true, localName = "lna_gain")
     public HackRFLNAGain getLNAGain()
     {

src/main/java/io/github/dsheirer/source/tuner/hackrf/HackRFTunerController.java

@@ -73,6 +73,7 @@ public class HackRFTunerController extends TunerController
     private String mFirmwareVersion;
     private HackRFSampleRate mSampleRate = HackRFSampleRate.RATE_5_0;
     private boolean mAmplifierEnabled = false;
+    private boolean mBiasTEnabled = false;
     private volatile int mBufferSampleCount = DEFAULT_BUFFER_SAMPLE_COUNT;
     private boolean mStreaming = false;
 
@@ -198,6 +199,15 @@ public class HackRFTunerController extends TunerController
     {
         if(device != null)
         {
+            try
+            {
+                device.setAntennaEnable(false);
+            }
+            catch(HackRfException | RuntimeException e)
+            {
+                mLog.error("Error disabling HackRF Bias-T antenna power", e);
+            }
+
             try
             {
                 device.close();
@@ -413,6 +423,12 @@ public class HackRFTunerController extends TunerController
         {
             execute(device -> device.startRx(this::receive));
             mStreaming = mDevice != null;
+
+            //The firmware turns off antenna power when the transceiver returns to idle, so restore it
+            if(mBiasTEnabled)
+            {
+                execute(device -> device.setAntennaEnable(true));
+            }
         }
     }
 
@@ -540,6 +556,20 @@ public class HackRFTunerController extends TunerController
         return mAmplifierEnabled;
     }
 
+    /**
+     * Enables (true) or disables (false) the Bias-T power on the antenna port.
+     */
+    public void setBiasTEnabled(boolean enabled) throws SourceException
+    {
+        execute(device -> device.setAntennaEnable(enabled));
+        mBiasTEnabled = enabled;
+    }
+
+    public boolean isBiasTEnabled()
+    {
+        return mBiasTEnabled;
+    }
+
     /**
      * Sets the IF LNA Gain
      */
@@ -602,6 +632,7 @@ public class HackRFTunerController extends TunerController
             {
                 setSampleRate(hackRFConfig.getSampleRate());
                 setAmplifierEnabled(hackRFConfig.getAmplifierEnabled());
+                setBiasTEnabled(hackRFConfig.isBiasT());
                 setLNAGain(hackRFConfig.getLNAGain());
                 setVGAGain(hackRFConfig.getVGAGain());
             }

src/main/java/io/github/dsheirer/source/tuner/hackrf/HackRFTunerEditor.java

@@ -49,6 +49,7 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
     private JButton mTunerInfo;
     private JComboBox<HackRFSampleRate> mSampleRateCombo;
     private JToggleButton mAmplifier;
+    private JToggleButton mBiasT;
     private JComboBox<HackRFLNAGain> mLnaGainCombo;
     private JComboBox<HackRFVGAGain> mVgaGainCombo;
 
@@ -80,7 +81,7 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
     private void init()
     {
         setLayout(new MigLayout("fill,wrap 3", "[right][grow,fill][fill]",
-                "[][][][][][][][][][][grow]"));
+                "[][][][][][][][][][][][grow]"));
 
         add(new JLabel("Tuner:"));
         add(getTunerIdLabel());
@@ -109,6 +110,12 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
 
         add(new JLabel("VGA:"));
         add(getVgaGainCombo(), "wrap");
+
+        add(new JLabel("Bias-T:"));
+        add(getBiasTToggle(), "wrap");
+
+        //Empty filler row that grows to take up the remaining vertical space
+        add(new JLabel(), "span,grow,push");
     }
 
     @Override
@@ -137,6 +144,7 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
         getTunerInfoButton().setEnabled(hasTuner());
 
         getAmplifierToggle().setEnabled(hasTuner());
+        getBiasTToggle().setEnabled(hasTuner());
         getLnaGainCombo().setEnabled(hasTuner());
         getVgaGainCombo().setEnabled(hasTuner());
 
@@ -144,6 +152,7 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
         {
             getSampleRateCombo().setSelectedItem(getConfiguration().getSampleRate());
             getAmplifierToggle().setSelected(getConfiguration().getAmplifierEnabled());
+            getBiasTToggle().setSelected(getConfiguration().isBiasT());
             getLnaGainCombo().setSelectedItem(getConfiguration().getLNAGain());
             getVgaGainCombo().setSelectedItem(getConfiguration().getVGAGain());
         }
@@ -254,6 +263,38 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
         return mAmplifier;
     }
 
+    private JToggleButton getBiasTToggle()
+    {
+        if(mBiasT == null)
+        {
+            mBiasT = new JToggleButton("Disabled");
+            mBiasT.setToolTipText("Enable or disable Bias-T power (3.3V) on the antenna port for active antennas or LNAs");
+            mBiasT.setEnabled(false);
+            //Item listener also fires for programmatic setSelected() when the configuration loads
+            mBiasT.addItemListener(e -> mBiasT.setText(mBiasT.isSelected() ? "Enabled" : "Disabled"));
+            mBiasT.addActionListener(arg0 ->
+            {
+                if(!isLoading())
+                {
+                    try
+                    {
+                        getTuner().getController().setBiasTEnabled(mBiasT.isSelected());
+                        save();
+                    }
+                    catch(SourceException e)
+                    {
+                        mLog.error("couldn't enable/disable bias-t", e);
+
+                        JOptionPane.showMessageDialog(HackRFTunerEditor.this, "Couldn't change Bias-T setting",
+                                "Error changing Bias-T setting", JOptionPane.ERROR_MESSAGE);
+                    }
+                }
+            });
+        }
+
+        return mBiasT;
+    }
+
     private JComboBox getSampleRateCombo()
     {
         if(mSampleRateCombo == null)
@@ -371,6 +412,7 @@ public class HackRFTunerEditor extends TunerEditor<HackRFTuner,HackRFTunerConfig
             getConfiguration().setAutoPPMCorrectionEnabled(getAutoPPMCheckBox().isSelected());
             getConfiguration().setSampleRate((HackRFSampleRate)getSampleRateCombo().getSelectedItem());
             getConfiguration().setAmplifierEnabled(getAmplifierToggle().isSelected());
+            getConfiguration().setBiasT(getBiasTToggle().isSelected());
             getConfiguration().setLNAGain((HackRFLNAGain)getLnaGainCombo().getSelectedItem());
             getConfiguration().setVGAGain((HackRFVGAGain)getVgaGainCombo().getSelectedItem());
             saveConfiguration();