Explicitly provide refClockFreqMHz to harnessClockInstantiator

fpga/src/main/scala/arty/Configs.scala

@@ -24,7 +24,7 @@ class WithArtyTweaks extends Config(
 
   new chipyard.harness.WithHarnessBinderClockFreqMHz(32) ++
   new chipyard.harness.WithAllClocksFromHarnessClockInstantiator ++
-  new chipyard.config.WithDTSTimebase(32768) ++
+  new chipyard.config.WithDTSTimebase(32000) ++
   new chipyard.config.WithSystemBusFrequency(32) ++
   new chipyard.config.WithPeripheryBusFrequency(32) ++
   new testchipip.WithNoSerialTL

fpga/src/main/scala/arty/TestHarness.scala

@@ -21,6 +21,7 @@ class ArtyFPGATestHarness(override implicit val p: Parameters) extends ArtyShell
 
   def success = {require(false, "Success not supported"); false.B }
 
+  def referenceClockFreqMHz = 32.0
   def referenceClock = clock_32MHz
   def referenceReset = hReset
 

fpga/src/main/scala/arty100t/Harness.scala

@@ -76,6 +76,7 @@ class Arty100THarness(override implicit val p: Parameters) extends Arty100TShell
 
     harnessSysPLL.plls.foreach(_._1.getReset.get := pllReset)
 
+    def referenceClockFreqMHz = dutFreqMHz
     def referenceClock = dutClock.in.head._1.clock
     def referenceReset = dutClock.in.head._1.reset
     def success = { require(false, "Unused"); false.B }

fpga/src/main/scala/vc707/TestHarness.scala

@@ -114,6 +114,7 @@ class VC707FPGATestHarnessImp(_outer: VC707FPGATestHarness) extends LazyRawModul
   val hReset = Wire(Reset())
   hReset := _outer.dutClock.in.head._1.reset
 
+  def referenceClockFreqMHz = _outer.dutFreqMHz
   def referenceClock = _outer.dutClock.in.head._1.clock
   def referenceReset = hReset
   def success = { require(false, "Unused"); false.B }

fpga/src/main/scala/vcu118/TestHarness.scala

@@ -118,6 +118,7 @@ class VCU118FPGATestHarnessImp(_outer: VCU118FPGATestHarness) extends LazyRawMod
   val hReset = Wire(Reset())
   hReset := _outer.dutClock.in.head._1.reset
 
+  def referenceClockFreqMHz = _outer.dutFreqMHz
   def referenceClock = _outer.dutClock.in.head._1.clock
   def referenceReset = hReset
   def success = { require(false, "Unused"); false.B }