From 33e63d61a60683064a83c334669df3005db36025 Mon Sep 17 00:00:00 2001
From: Jerzy Jamroz <jerzy.jamroz@gmail.com>
Date: Thu, 5 Dec 2024 12:00:35 +0100
Subject: [PATCH] feat: Reset the EVR fractional synth command.

---
 evrApp/Db/evrbase.db    | 8 ++++++++
 evrApp/src/evr.cpp      | 3 ++-
 evrApp/src/evr/evr.h    | 1 +
 evrMrmApp/src/drvem.cpp | 7 +++++++
 evrMrmApp/src/drvem.h   | 3 ++-
 5 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/evrApp/Db/evrbase.db b/evrApp/Db/evrbase.db
index 985e35d4..49e1b561 100644
--- a/evrApp/Db/evrbase.db
+++ b/evrApp/Db/evrbase.db
@@ -152,6 +152,14 @@ record(ao, "$(P)Link$(s=:)Clk-SP") {
   info(autosaveFields_pass0, "VAL EGU ESLO HOPR LOPR DRVH DRVL PREC")
 }
 
+record(bo,"$(P)ResetFracSynth-Cmd" ) {
+  field(DESC, "Reset button")
+  field(DTYP, "Obj Prop command")
+  field(OUT , "@OBJ=$(OBJ), PROP=Reset Frac Synth")
+  field(ZNAM, "Reset")
+  field(ONAM, "Reset")
+}
+
 record(ai, "$(P)Link$(s=:)Clk-I") {
   field(DTYP, "Obj Prop double")
   field(INP , "@OBJ=$(OBJ), PROP=Clock")
diff --git a/evrApp/src/evr.cpp b/evrApp/src/evr.cpp
index fb92600a..294f9277 100644
--- a/evrApp/src/evr.cpp
+++ b/evrApp/src/evr.cpp
@@ -50,7 +50,7 @@ std::string EVR::versionSw() const
     return MRF_VERSION;
 }
 
-std::string EVR::getCommitHash() const 
+std::string EVR::getCommitHash() const
 {
     return __COMMIT_HASH;
 }
@@ -131,6 +131,7 @@ OBJECT_BEGIN(EVR) {
     OBJECT_PROP2("Timestamp Source", &EVR::SourceTSraw, &EVR::setSourceTSraw);
 
     OBJECT_PROP2("Clock", &EVR::clock, &EVR::clockSet);
+    OBJECT_PROP1("Reset Frac Synth", &EVR::resetFracSynth);
 
     OBJECT_PROP2("Timestamp Clock", &EVR::clockTS, &EVR::clockTSSet);
 
diff --git a/evrApp/src/evr/evr.h b/evrApp/src/evr/evr.h
index f42164cd..d7aabdb9 100644
--- a/evrApp/src/evr/evr.h
+++ b/evrApp/src/evr/evr.h
@@ -97,6 +97,7 @@ class epicsShareClass EVR : public mrf::ObjectInst<EVR>
    *@param clk Clock rate in Hz
    */
   virtual void clockSet(double clk)=0;
+  virtual void resetFracSynth()=0;
 
   //! Internal PLL Status
   virtual bool pllLocked() const=0;
diff --git a/evrMrmApp/src/drvem.cpp b/evrMrmApp/src/drvem.cpp
index 8ec852b8..a85be550 100644
--- a/evrMrmApp/src/drvem.cpp
+++ b/evrMrmApp/src/drvem.cpp
@@ -607,6 +607,13 @@ void EVRMRM::clockSet(double freq)
     }
 }
 
+void
+EVRMRM::resetFracSynth()
+{
+    epicsUInt32 oldfrac=READ32(base, FracDiv);
+    WRITE32(base, FracDiv, oldfrac);
+}
+
 epicsUInt16
 EVRMRM::clockMode() const
 {
diff --git a/evrMrmApp/src/drvem.h b/evrMrmApp/src/drvem.h
index 84a321d2..2f95d86b 100644
--- a/evrMrmApp/src/drvem.h
+++ b/evrMrmApp/src/drvem.h
@@ -89,7 +89,7 @@ struct eventCode {
 
 /**@brief Modular Register Map Event Receivers
  *
- * 
+ *
  */
 class epicsShareClass EVRMRM : public mrf::ObjectInst<EVRMRM, EVR>,
                                public MRMSPI,
@@ -149,6 +149,7 @@ class epicsShareClass EVRMRM : public mrf::ObjectInst<EVRMRM, EVR>,
     virtual double clock() const OVERRIDE FINAL
         {SCOPED_LOCK(evrLock);return eventClock;}
     virtual void clockSet(double) OVERRIDE FINAL;
+    virtual void resetFracSynth() OVERRIDE FINAL;
 
     epicsUInt16 clockMode() const;
     void clockModeSet(epicsUInt16 mode);