Add mechanism to check if acquirePeriod is valid

ADHamaApp/src/hama.cpp

@@ -187,6 +187,7 @@ Hama::Hama(const char* portName, int cameraId, int maxBuffers, size_t maxMemory,
     createParam(hAcqControlString, asynParamInt32, &hAcqControl);
 
     setIntegerParam(NDArrayCallbacks, 1);
+    setStringParam (ADStatusMessage, "Idle");
     callParamCallbacks();
 
    connectCamera();
@@ -790,6 +791,7 @@ void Hama::imageTask(){
             lock();
 
             status = startAcquire();
+            setStringParam (ADStatusMessage, "Acquiring");
             setIntegerParam(hAcqControl, 1);
             callParamCallbacks();
 
@@ -908,6 +910,7 @@ void Hama::imageTask(){
             setIntegerParam(ADAcquire, 0);
             setIntegerParam(hAcqControl, 0);
             setIntegerParam(ADStatus, ADStatusIdle);
+            setStringParam (ADStatusMessage, "Acquisition Done");
         }
         callParamCallbacks();
     }
@@ -964,17 +967,28 @@ asynStatus Hama::writeInt32(asynUser *pasynUser, epicsInt32 value) {
 
     if (index == ADAcquire) {
         if (value && adstatus != ADStatusAcquire) {
-            /* Send an event to wake up the acq task.*/
-            puts("Requested acquire start event. Sending acquire start event signal to thread");
-            int evr_counts = 0;
-            getIntegerParam(evrCounts, &evr_counts);
-            printf("EVR counts on Acquire: %d\n", evr_counts);
-            epicsEventSignal(this->startEvent_);
+            double readoutTime, acquirePeriod, acquireTime;
+            status = getDoubleParam(hTimingReadoutTime, &readoutTime);
+            status = getDoubleParam(ADAcquireTime, &acquireTime);
+            status = getDoubleParam(ADAcquirePeriod, &acquirePeriod);
+
+            if (acquirePeriod < (readoutTime + acquireTime)) {
+                setStringParam (ADStatusMessage,
+                    "Acquire Period must be greater than ReadoutTime + AcquireTime");
+                setIntegerParam(ADAcquire, 0);
+                setIntegerParam(ADStatus, ADStatusAborted);
+            }
+            else {
+                /* Send an event to wake up the acq task.*/
+                setStringParam (ADStatusMessage, "");
+                epicsEventSignal(this->startEvent_);
+            }
         }
         else if (!value && (adstatus == ADStatusAcquire || adstatus == ADStatusError || adstatus == ADStatusWaiting)) {
             /* This was a command to stop acquisition */
             setIntegerParam(ADStatus, ADStatusAborted);
             setIntegerParam(hAcqControl, 0);
+            setStringParam (ADStatusMessage, "Acquisition aborted by user");
             stopAcquire();
         }
     }
@@ -1387,7 +1401,6 @@ asynStatus Hama::writeInt32(asynUser *pasynUser, epicsInt32 value) {
       //}
    }
 
-   setIntegerParam(index, value);
     /* Do callbacks so higher layers see any changes */
    status = (asynStatus) callParamCallbacks();