KiwiSDR: added a DC block

plugins/samplesource/kiwisdr/kiwisdrgui.cpp

@@ -165,6 +165,12 @@ void KiwiSDRGui::on_serverAddressApplyButton_clicked()
 	sendSettings();
 }
 
+void KiwiSDRGui::on_dcBlock_toggled(bool checked)
+{
+	m_settings.m_dcBlock = checked;
+	sendSettings();
+}
+
 void KiwiSDRGui::on_record_toggled(bool checked)
 {
     if (checked) {

plugins/samplesource/kiwisdr/kiwisdrgui.h

@@ -85,6 +85,7 @@ private slots:
 	void on_agc_toggled(bool checked);
 	void on_serverAddress_returnPressed();
 	void on_serverAddressApplyButton_clicked();
+  	void on_dcBlock_toggled(bool checked);
 	void openDeviceSettingsDialog(const QPoint& p);
     void updateStatus();
     void updateHardware();

plugins/samplesource/kiwisdr/kiwisdrgui.ui

@@ -32,7 +32,7 @@
    </font>
   </property>
   <property name="windowTitle">
-   <string>Test source</string>
+   <string>KiwiSDR</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <property name="spacing">
@@ -310,6 +310,16 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="ButtonSwitch" name="dcBlock">
+       <property name="toolTip">
+        <string>Automatic DC offset removal</string>
+       </property>
+       <property name="text">
+        <string>DC</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>

plugins/samplesource/kiwisdr/kiwisdrinput.cpp

@@ -302,6 +302,12 @@ bool KiwiSDRInput::applySettings(const KiwiSDRSettings& settings, bool force)
 		emit setWorkerGain(settings.m_gain, settings.m_useAGC);
 	}
 
+    if (m_settings.m_dcBlock != settings.m_dcBlock)
+    {
+        reverseAPIKeys.append("dcBlock");
+        m_deviceAPI->configureCorrections(settings.m_dcBlock, false);
+    }
+
     if (m_settings.m_centerFrequency != settings.m_centerFrequency || force)
     {
         reverseAPIKeys.append("centerFrequency");
@@ -382,6 +388,9 @@ int KiwiSDRInput::webapiSettingsPutPatch(
     if (deviceSettingsKeys.contains("useAGC")) {
         settings.m_useAGC = response.getKiwiSdrSettings()->getUseAgc();
     }
+    if (deviceSettingsKeys.contains("dcBlock")) {
+        settings.m_dcBlock = response.getKiwiSdrSettings()->getDcBlock() != 0;
+    }
     if (deviceSettingsKeys.contains("centerFrequency")) {
         settings.m_centerFrequency = response.getKiwiSdrSettings()->getCenterFrequency();
     }
@@ -432,6 +441,7 @@ void KiwiSDRInput::webapiFormatDeviceSettings(SWGSDRangel::SWGDeviceSettings& re
 {
     response.getKiwiSdrSettings()->setGain(settings.m_gain);
     response.getKiwiSdrSettings()->setUseAgc(settings.m_useAGC ? 1 : 0);
+    response.getKiwiSdrSettings()->setDcBlock(settings.m_dcBlock ? 1 : 0);
     response.getKiwiSdrSettings()->setCenterFrequency(settings.m_centerFrequency);
 
     if (response.getKiwiSdrSettings()->getServerAddress()) {
@@ -480,6 +490,9 @@ void KiwiSDRInput::webapiReverseSendSettings(QList<QString>& deviceSettingsKeys,
     if (deviceSettingsKeys.contains("useAGC")) {
         swgKiwiSDRSettings->setUseAgc(settings.m_useAGC ? 1 : 0);
     }
+    if (deviceSettingsKeys.contains("dcBlock") || force) {
+        swgKiwiSDRSettings->setDcBlock(settings.m_dcBlock ? 1 : 0);
+    }
     if (deviceSettingsKeys.contains("centerFrequency") || force) {
         swgKiwiSDRSettings->setCenterFrequency(settings.m_centerFrequency);
     }

plugins/samplesource/kiwisdr/kiwisdrsettings.cpp

@@ -30,6 +30,7 @@ void KiwiSDRSettings::resetToDefaults()
 
 	m_gain = 20;
 	m_useAGC = true;
+    m_dcBlock = false;
 
 	m_serverAddress = "127.0.0.1:8073";
 

plugins/samplesource/kiwisdr/kiwisdrsettings.h

@@ -25,6 +25,7 @@
 struct KiwiSDRSettings {
 	uint32_t m_gain;
 	bool m_useAGC;
+    bool m_dcBlock;
 
     quint64 m_centerFrequency;
 	QString m_serverAddress;

plugins/samplesource/kiwisdr/readme.md

@@ -2,7 +2,7 @@
 
 <h2>Introduction</h2>
 
-This plugin is designed to enable connection to publicly available [KiwiSDR](http://kiwisdr.com/) receivers. A list of on-line receiver is available [here](https://sdr.hu/?q=kiwisdr)
+This plugin is designed to enable connection to publicly available [KiwiSDR](http://kiwisdr.com/) receivers. A list of on-line receivers is available [here](https://sdr.hu/?q=kiwisdr)
 
 <h2>Interface</h2>
 
@@ -57,4 +57,8 @@ This is the RF gain control sent to the remote
 
 <h3>9: AGC</h3>
 
-Use this button to switch on or off the AGC in the remote
+Use this button to switch on or off the AGC in the remote
+
+<h3>10: DC block</h3>
+
+Some remote receivers exhibit a peak at DC. Use this button to filter DC out.