adds a POC preset based count

src/asynStreamGeneratorDriver.h

@@ -36,6 +36,12 @@ struct __attribute__((__packed__)) DetectorEvent {
     uint16_t Amplitude : 8;
     uint16_t Id : 1;
     inline uint32_t nanosecs() { return TimeStamp * 100; }
+    inline uint64_t pixelId(uint32_t mpcdId) {
+        const uint32_t x_pixels = 128;
+        const uint32_t y_pixels = 128;
+        return (mpcdId - 1) * x_pixels * y_pixels +
+               x_pixels * (uint32_t)this->XPosition + (uint32_t)this->YPosition;
+    }
 };
 
 struct __attribute__((__packed__)) MonitorEvent {
@@ -60,12 +66,24 @@ struct __attribute__((__packed__)) NormalisedDetectorEvent {
     uint32_t PixID;
 };
 
+/*******************************************************************************
+ * Status values that should match the definition in db/daq_common.db
+ */
+#define STATUS_IDLE 0
+#define STATUS_COUNTING 1
+#define STATUS_LOWRATE 2
+#define STATUS_PAUSED 3
+
 /*******************************************************************************
  * Parameters for use in DB records
  *
  * i.e.e drvInfo strings that are used to identify the parameters
  */
 
+#define P_StatusString "STATUS"
+#define P_ResetString "RESET"
+#define P_CountPresetString "P_CNT"
+#define P_MonitorChannelString "MONITOR"
 #define P_CountsString "COUNTS%d"
 
 /*******************************************************************************
@@ -77,16 +95,23 @@ class asynStreamGeneratorDriver : public asynPortDriver {
                               const int numChannels);
     virtual ~asynStreamGeneratorDriver();
 
+    virtual asynStatus writeInt32(asynUser *pasynUser, epicsInt32 value);
+
     void receiveUDP();
     void produceMonitor();
     void produceDetector();
 
   protected:
     // Parameter Identifying IDs
+    int P_Status;
+    int P_Reset;
+    int P_CountPreset;
+    int P_MonitorChannel;
     int *P_Counts;
 
   private:
     asynUser *pasynUDPUser;
+    epicsEventId pausedEventId;
 
     int num_channels;