added FEC counter per link

Author: sy-c

doc/releaseNotes.md

@@ -28,3 +28,4 @@ This file describes the main feature changes for released versions of ReadoutCar
 ## next version
 - Added glitchCounter to roc-status (monitoring + JSON output).
 - Added DMA status (enabled / disabled) to roc-status (all output styles, including monitoring).
+- Added FEC counter per link to roc-status (stdout + JSON output).

src/Cru/Common.h

@@ -72,6 +72,7 @@ struct Link {
   /*uint32_t systemId = 0x1ff; // invalid, used as "unset" placeholder
   uint32_t feeId = 0x1f; // invalid, used as "unset" placeholder*/
   uint32_t glitchCounter = 0;
+  uint32_t fecCounter = 0;
 
   bool operator==(const Link& dlink) const
   {

src/Cru/Constants.h

@@ -257,6 +257,9 @@ static constexpr Register GBT_LINK_TX_CLOCK(0x00000004);
 /// Register for getting the glitch counter
 static constexpr Register GBT_LINK_GLITCH_COUNTER(0x00000044);
 
+/// Register for getting the FEC counter
+static constexpr Register GBT_LINK_FEC_COUNTER(0x0000001C);
+
 /// Register for selecting the the GBT Multiplexer
 static constexpr Register GBT_MUX_SELECT(0x0000001c);
 /*static constexpr uint32_t GBT_MUX_TTC(0x0);

src/Cru/CruBar.cxx

@@ -510,6 +510,7 @@ Cru::ReportInfo CruBar::report(bool forConfig)
     link.rxFreq = gbt.getRxClockFrequency(link) / 1e6; // Hz -> Mhz
     link.txFreq = gbt.getTxClockFrequency(link) / 1e6; // Hz -> Mhz
     link.glitchCounter = gbt.getGlitchCounter(link);
+    link.fecCounter = gbt.getFecCounter(link);
     link.systemId = datapathWrapper.getSystemId(link);
     link.feeId = datapathWrapper.getFeeId(link);
 

src/Cru/Gbt.cxx

@@ -326,6 +326,17 @@ uint32_t Gbt::getGlitchCounter(Link link)
   return mPdaBar->readRegister(address / 4);
 }
 
+uint32_t Gbt::getFecCounter(Link link)
+{
+  uint32_t address = Cru::getWrapperBaseAddress(link.wrapper) +
+                     Cru::Registers::GBT_WRAPPER_BANK_OFFSET.address * (link.bank + 1) +
+                     Cru::Registers::GBT_BANK_LINK_OFFSET.address * (link.id + 1) +
+                     Cru::Registers::GBT_LINK_REGS_OFFSET.address +
+                     Cru::Registers::GBT_LINK_FEC_COUNTER.address;
+
+  return mPdaBar->readRegister(address / 4);
+}
+
 void Gbt::resetFifo()
 {
   mPdaBar->modifyRegister(Cru::Registers::BSP_USER_CONTROL.index, 7, 1, 0x1); // reset TX

src/Cru/Gbt.h

@@ -52,6 +52,7 @@ class Gbt
   uint32_t getRxClockFrequency(Link link);
   uint32_t getTxClockFrequency(Link link);
   uint32_t getGlitchCounter(Link link);
+  uint32_t getFecCounter(Link link);
   void resetFifo();
   std::map<int, LoopbackStats> getLoopbackStats(bool reset, GbtPatternMode::type patternMode = GbtPatternMode::type::Counter,
                                                 GbtCounterType::type counterType = GbtCounterType::type::ThirtyBit,