[EMCAL-610] Fix handling of the time sample

The digitizer creates time samples however it stores them in
ns. The time needs to be converted to sample ID dividing by
the length of the time sample.

Author: mfasDa

Detectors/EMCAL/simulation/src/RawWriter.cxx

@@ -8,6 +8,8 @@
 // granted to it by virtue of its status as an Intergovernmental Organization
 // or submit itself to any jurisdiction.
 
+#include "FairLogger.h"
+
 #include <fmt/core.h>
 #include <gsl/span>
 #include <TSystem.h>
@@ -102,7 +104,15 @@ bool RawWriter::processNextTrigger()
       } else {
         bunchDigits = &(towerdata->second.mDigits);
       }
-      (*bunchDigits)[int(dig.getTimeStamp())] = &dig;
+      // Get time sample of the digit:
+      // Digitizer stores the time sample in ns, needs to be converted to time sample dividing
+      // by the length of the time sample
+      auto timesample = int(dig.getTimeStamp() / emcal::constants::EMCAL_TIMESAMPLE);
+      if (timesample >= mNADCSamples) {
+        LOG(ERROR) << "Digit time sample " << timesample << " outside range [0," << mNADCSamples << "]";
+        continue;
+      }
+      (*bunchDigits)[timesample] = &dig;
     }
   }