fix: Correct the setFrequency command (#117)

* fix: Correct the setFrequency command, mixed between clock frequency and period frequency * perf: Slightly better accuracy. --------- Co-authored-by: Jerzy Jamroz <[email protected]>
epics-modules · Jan 12, 2024 · 50dc177 · 50dc177
1 parent 73aea17
commit 50dc177
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/evgMrmApp/src/evgMxc.cpp b/evgMrmApp/src/evgMxc.cpp
@@ -63,10 +63,8 @@ evgMxc::getPrescaler() const {
 
 void
 evgMxc::setFrequency(epicsFloat64 freq) {
-    epicsUInt32 clkSpeed = (epicsUInt32)(getFrequency() *
-                            pow(10.0, 6));
-    epicsUInt32 preScaler = (epicsUInt32)((epicsFloat64)clkSpeed / freq);
-
+    epicsFloat64 clkSpeed = m_owner->getFrequency() * pow(10.0, 6);
+    epicsUInt32 preScaler = (epicsUInt32)lround(clkSpeed / freq);
     setPrescaler(preScaler);
 }
 
@@ -98,4 +96,3 @@ evgMxc::getTrigEvtMap(epicsUInt16 trigEvt) const {
     epicsUInt32    mask = 1 << (trigEvt+MuxControl_TrigMap_SHIFT);
     return READ32(m_pReg, MuxControl(m_id))&mask;
 }
-