From 98c703b3282b47ae2e0deaf317468f789cc9176e Mon Sep 17 00:00:00 2001
From: Dimitri Stolnikov
Date: Sun, 1 Apr 2012 16:35:30 -0700
Subject: fcd: adds setter function to configure mixer gain

---
 gr-fcd/grc/fcd_source_c.xml       | 15 ++++++++++++++-
 gr-fcd/include/fcd/fcd_source_c.h | 14 ++++++++++++--
 gr-fcd/lib/fcd_source_c_impl.cc   | 16 ++++++++++++++++
 gr-fcd/lib/fcd_source_c_impl.h    |  1 +
 gr-fcd/swig/fcd_source_c.i        |  1 +
 5 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/gr-fcd/grc/fcd_source_c.xml b/gr-fcd/grc/fcd_source_c.xml
index 8572e6da1..7c55239aa 100644
--- a/gr-fcd/grc/fcd_source_c.xml
+++ b/gr-fcd/grc/fcd_source_c.xml
@@ -9,6 +9,9 @@
 #if $lna() != 20.0
 self.$(id).set_lna_gain($lna)
 #end if
+#if $mixer() != +12.0
+self.$(id).set_mixer_gain($mixer)
+#end if
 #if $ppm() != 115
 self.$(id).set_freq_corr($ppm)
 #end if
@@ -22,6 +25,7 @@ self.$(id).set_freq($freq)
     </make>
     <callback>set_freq($freq)</callback>
     <callback>set_lna_gain($lna)</callback>
+    <callback>set_mixer_gain($mixer)</callback>
     <callback>set_freq_corr($ppm)</callback>
     <callback>set_dc_corr($dci,$dcq)</callback>
     <callback>set_iq_corr($iq_gain,$iq_phase)</callback>
@@ -44,6 +48,12 @@ self.$(id).set_freq($freq)
         <value>20.0</value>
         <type>real</type>
     </param>
+    <param>
+        <name>Mixer Gain (dB)</name>
+        <key>mixer</key>
+        <value>+12</value>
+        <type>real</type>
+    </param>
     <param>
         <name>Frequency corr. (ppm)</name>
         <key>ppm</key>
@@ -94,7 +104,10 @@ To find the device name on Linux type:
 
 The LNA gain is a set of discrete values between -5 to 30 dB with 2.5 dB step, but you can \
 use any float value and it will be rounded to the nearest valid value.
-   
+
+The Mixer gain can be set either to +4 or +12 dB, but you can use any float value \
+and it will be rounded to the nearest valid value.
+
 The FCD block can autmatically apply frequency correction:
   - For FCD v1.0 you can leave at -120 ppm
   - For FCD v1.1 with serial number 810 or greater use -12 ppm
diff --git a/gr-fcd/include/fcd/fcd_source_c.h b/gr-fcd/include/fcd/fcd_source_c.h
index 31393418f..988925c2e 100644
--- a/gr-fcd/include/fcd/fcd_source_c.h
+++ b/gr-fcd/include/fcd/fcd_source_c.h
@@ -88,11 +88,21 @@ public:
      * 2.5 dB steps, you can can call this method with any float value
      * and it will be rounded to the nearest valid value.
      * 
-     * By default the FCD is set to 20 dB and this is a good value for most
-     * cases. In noisy areas you may try to reduce the gain.
+     * By default the LNA gain is set to 20 dB and this is a good value for
+     * most cases. In noisy areas you may try to reduce the gain.
      */
     virtual void set_lna_gain(float gain) = 0;
 
+    /*! \brief Set mixer gain.
+     *  \param gain The new gain in dB.
+     *
+     * Set the mixer gain in the FCD. Valid values are +4 and +12 dB.
+     *
+     * By default the mixer gain is set to +12 dB and this is a good value for
+     * most cases. In noisy areas you may try to reduce the gain.
+     */
+    virtual void set_mixer_gain(float gain) = 0;
+
     /*! \brief Set new frequency correction.
      *  \param ppm The new frequency correction in parts per million
      * 
diff --git a/gr-fcd/lib/fcd_source_c_impl.cc b/gr-fcd/lib/fcd_source_c_impl.cc
index a67d5bdbb..9543f16eb 100644
--- a/gr-fcd/lib/fcd_source_c_impl.cc
+++ b/gr-fcd/lib/fcd_source_c_impl.cc
@@ -173,6 +173,22 @@ void fcd_source_c_impl::set_lna_gain(float gain)
   /* TODO: check fme */
 }
 
+// Set mixer gain
+void fcd_source_c_impl::set_mixer_gain(float gain)
+{
+    FCD_MODE_ENUM fme;
+    unsigned char g;
+
+    if ( gain > 4.0 ) {
+        g = TMGE_P12_0DB;
+    } else {
+        g = TMGE_P4_0DB;
+    }
+
+    fme = fcdAppSetParam(FCD_CMD_APP_SET_MIXER_GAIN, &g, 1);
+    /* TODO: check fme */
+}
+
 // Set new frequency correction
 void fcd_source_c_impl::set_freq_corr(int ppm)
 {
diff --git a/gr-fcd/lib/fcd_source_c_impl.h b/gr-fcd/lib/fcd_source_c_impl.h
index e4a7467c5..d082ecc1e 100644
--- a/gr-fcd/lib/fcd_source_c_impl.h
+++ b/gr-fcd/lib/fcd_source_c_impl.h
@@ -32,6 +32,7 @@ public:
   void set_freq(float freq);
   void set_freq_khz(int freq);
   void set_lna_gain(float gain);
+  void set_mixer_gain(float gain);
   void set_freq_corr(int ppm);
   void set_dc_corr(double _dci, double _dcq);
   void set_iq_corr(double _gain, double _phase);
diff --git a/gr-fcd/swig/fcd_source_c.i b/gr-fcd/swig/fcd_source_c.i
index 3438ab74d..77fcf8a42 100644
--- a/gr-fcd/swig/fcd_source_c.i
+++ b/gr-fcd/swig/fcd_source_c.i
@@ -15,6 +15,7 @@ public:
   void set_freq(float freq);
   void set_freq_khz(int freq);
   void set_lna_gain(float gain);
+  void set_mixer_gain(float gain);
   void set_freq_corr(int ppm);
   void set_dc_corr(double dci, double dcq);
   void set_iq_corr(double gain, double phase);
-- 
cgit