NDPluginROIStat: Add the ability to clear the time series data without also starting acquisition.

Author: Matthew Pearson (mkp)

ADApp/Db/NDROIStat.template

@@ -43,7 +43,9 @@ record(mbbo, "$(P)$(R)TSControl")
    field(TWVL, "2")
    field(TWST, "Stop")
    field(THVL, "3")
-   field(THST, "Read") 
+   field(THST, "Read")
+   field(FRVL, "4")
+   field(FRST, "Erase")
 }
 
 # This record periodically pokes the TSControl record with 3 to read the time series

ADApp/pluginSrc/NDPluginROIStat.cpp

@@ -361,10 +361,8 @@ asynStatus NDPluginROIStat::writeInt32(asynUser *pasynUser, epicsInt32 value)
     } else if (function == NDPluginROIStatTSControl) {
         switch (value) {
           case TSEraseStart:
-            currentTSPoint_ = 0;
-            setIntegerParam(NDPluginROIStatTSCurrentPoint, currentTSPoint_);
+            clearTimeSeries();
             setIntegerParam(NDPluginROIStatTSAcquiring, 1);
-            memset(timeSeries_, 0, maxROIs_*MAX_TIME_SERIES_TYPES*numTSPoints_*sizeof(double));
             break;
           case TSStart:
             if (currentTSPoint_ < numTSPoints_) {
@@ -378,6 +376,10 @@ asynStatus NDPluginROIStat::writeInt32(asynUser *pasynUser, epicsInt32 value)
           case TSRead:
             doTimeSeriesCallbacks();
             break;
+          case TSErase:
+            clearTimeSeries();
+            doTimeSeriesCallbacks();
+            break;
         }
     } else if (function < FIRST_NDPLUGIN_ROISTAT_PARAM) {
       stat = (NDPluginDriver::writeInt32(pasynUser, value) == asynSuccess) && stat;
@@ -432,6 +434,19 @@ asynStatus NDPluginROIStat::clear(epicsUInt32 roi)
   return status;
 }
 
+/**
+ * Reset the time series data.
+ * This is meant to be called in writeInt32.
+ */
+void NDPluginROIStat::clearTimeSeries()
+{
+  currentTSPoint_ = 0;
+  setIntegerParam(NDPluginROIStatTSCurrentPoint, currentTSPoint_);
+  if (timeSeries_) {
+    memset(timeSeries_, 0, maxROIs_*MAX_TIME_SERIES_TYPES*numTSPoints_*sizeof(double));
+  }
+}
+
 void NDPluginROIStat::doTimeSeriesCallbacks()
 {
   double *pData;

ADApp/pluginSrc/NDPluginROIStat.h

@@ -62,7 +62,8 @@ typedef enum {
     TSEraseStart,
     TSStart,
     TSStop,
-    TSRead
+    TSRead,
+    TSErase
 } NDPluginROIStatsTSControl_t;
 
 /** Structure defining a Region-Of-Interest and Stats */
@@ -140,6 +141,7 @@ class NDPLUGIN_API NDPluginROIStat : public NDPluginDriver {
     template <typename epicsType> asynStatus doComputeStatisticsT(NDArray *pArray, NDROI_t *pROI);
     asynStatus doComputeStatistics(NDArray *pArray, NDROI_t *pStats);
     asynStatus clear(epicsUInt32 roi);
+    void clearTimeSeries();
     void doTimeSeriesCallbacks();
 
     int maxROIs_;
@@ -149,3 +151,5 @@ class NDPLUGIN_API NDPluginROIStat : public NDPluginDriver {
 };
 
 #endif //NDPluginROIStat_H
+
+