4 files changed, 26 insertions, 2 deletions
diff --git a/src/output/Lime.cpp b/src/output/Lime.cpp
index 3a5f893..fff3dd4 100644
--- a/src/output/Lime.cpp
+++ b/src/output/Lime.cpp
@@ -355,6 +355,11 @@ double Lime::get_temperature(void) const
     return temp;
 }
 
+uint32_t Lime::get_fifo_fill_count(void) const
+{
+    return m_last_fifo_filled_count;
+}
+
 void Lime::transmit_frame(const struct FrameData &frame)
 {
     if (not m_device)
diff --git a/src/output/Lime.h b/src/output/Lime.h
index 8658053..febb878 100644
--- a/src/output/Lime.h
+++ b/src/output/Lime.h
@@ -81,6 +81,7 @@ class Lime : public Output::SDRDevice
     virtual const char *device_name(void) const override;
 
     virtual double get_temperature(void) const override;
+    virtual uint32_t get_fifo_fill_count(void) const;
 
   private:
     SDRDeviceConfig &m_conf;
diff --git a/src/output/SDR.cpp b/src/output/SDR.cpp
index 23a947b..31a5c79 100644
--- a/src/output/SDR.cpp
+++ b/src/output/SDR.cpp
@@ -25,6 +25,7 @@
  */
 
 #include "output/SDR.h"
+#include "output/Lime.h"
 
 #include "PcDebug.h"
 #include "Log.h"
@@ -83,6 +84,10 @@ SDR::SDR(SDRDeviceConfig& config, std::shared_ptr<SDRDevice> device) :
     RC_ADD_PARAMETER(frames, "Counter of number of frames modulated");
     RC_ADD_PARAMETER(gpsdo_num_sv, "Number of Satellite Vehicles tracked by GPSDO");
     RC_ADD_PARAMETER(gpsdo_holdover, "1 if the GPSDO is in holdover, 0 if it is using gnss");
+
+    if (std::dynamic_pointer_cast<Lime>(device)) {
+        RC_ADD_PARAMETER(fifo_fill, "A value representing the Lime FIFO fullness");
+    }
 }
 
 SDR::~SDR()
@@ -388,7 +393,8 @@ void SDR::set_parameter(const string& parameter, const string& value)
              parameter == "latepackets" or
              parameter == "frames" or
              parameter == "gpsdo_num_sv" or
-             parameter == "gpsdo_holdover") {
+             parameter == "gpsdo_holdover" or
+             parameter == "fifo_fill") {
         throw ParameterError("Parameter " + parameter + " is read-only.");
     }
     else {
@@ -453,6 +459,18 @@ const string SDR::get_parameter(const string& parameter) const
         const auto stat = m_device->get_run_statistics();
         ss << (stat.gpsdo_holdover ? 1 : 0);
     }
+    else if (parameter == "fifo_fill") {
+        const auto dev = std::dynamic_pointer_cast<Lime>(m_device);
+
+        if (dev) {
+            ss << dev->get_fifo_fill_count();
+        }
+        else {
+            ss << "Parameter '" << parameter <<
+                "' is not exported by controllable " << get_rc_name();
+            throw ParameterError(ss.str());
+        }
+    }
     else {
         ss << "Parameter '" << parameter <<
             "' is not exported by controllable " << get_rc_name();
diff --git a/src/output/SDRDevice.h b/src/output/SDRDevice.h
index 9796479..7ab4bc8 100644
--- a/src/output/SDRDevice.h
+++ b/src/output/SDRDevice.h
@@ -2,7 +2,7 @@
    Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
    Queen in Right of Canada (Communications Research Center Canada)
 
-   Copyright (C) 2017
+   Copyright (C) 2019
    Matthias P. Braendli, matthias.braendli@mpb.li
 
     http://opendigitalradio.org