C++ setDoubleParam函数代码示例

void omsMAXvEncFunc::initialize()
{
    const char* functionName = "initialize";

    Debug(5, "omsMAXvEncFunc::initialize: start initialize\n" );

    int encIndex = numAxes;
    if (encIndex > MAXENCFUNC) encIndex = MAXENCFUNC;

    /* auxiliary encoders */
    for (int i=0; i < encIndex; ++i){
        if (createParam(i, motorEncoderFunctionString, asynParamInt32, &encFuncIndex[i]) != asynSuccess)
                errlogPrintf("%s:%s:%s: unable to create param motorEncoderFunctionString, index %d\n",
                              driverName, functionName, portName, i);
        if (createParam(i, motorEncoderRawPosString, asynParamFloat64, &encRawPosIndex[i]) != asynSuccess)
                errlogPrintf("%s:%s:%s: unable to create param motorEncoderRawPosString, index %d\n",
                              driverName, functionName, portName, i);
    }
    createParam(0, motorAuxEncoderPositionString, asynParamFloat64, &encPosIndex[0]);
    createParam(1, motorAuxEncoderPositionString, asynParamFloat64, &encPosIndex[1]);
    Debug(3, "omsMAXvEncFunc::initialize: auxiliary encoder 0 position index %d\n", encPosIndex[0] );
    Debug(3, "omsMAXvEncFunc::initialize: auxiliary encoder 1 position index %d\n", encPosIndex[1] );
    for (int i=0; i < encIndex; ++i) Debug(3, "omsMAXvEncFunc::initialize: encFuncIndex %d => %d\n", i, encFuncIndex[i] );
    lock();
    for (int i=0; i < encIndex; ++i){
        setIntegerParam(i, encFuncIndex[i], 0);
        setDoubleParam(i, encRawPosIndex[i], 0.0);
    }
    setDoubleParam(0, encPosIndex[0], 0.0);
    setDoubleParam(1, encPosIndex[1], 0.0);
    for (int i=0; i < encIndex; ++i) {
        callParamCallbacks(i, i);
    }
    unlock();
}

void motorSimAxis::process(double delta )
{
  double lastpos;
  int done = 0;

  lastpos = nextpoint_.axis[0].p;
  nextpoint_.T += delta;
  routeFind( route_, reroute_, &endpoint_, &nextpoint_ );
  /*  if (reroute_ == ROUTE_NEW_ROUTE) routePrint( route_, reroute_, &endpoint_, &nextpoint_, stdout ); */
  reroute_ = ROUTE_CALC_ROUTE;

  /* No, do a limits check */
  if (homing_ && 
    ((lastpos - home_) * (nextpoint_.axis[0].p - home_)) <= 0)
  {
    /* Homing and have crossed the home sensor - return to home */
    homing_ = 0;
    reroute_ = ROUTE_NEW_ROUTE;
    endpoint_.axis[0].p = home_;
    endpoint_.axis[0].v = 0.0;
  }
  if ( nextpoint_.axis[0].p > hiHardLimit_ && nextpoint_.axis[0].v > 0 )
  {
    if (homing_) setVelocity(-endpoint_.axis[0].v, 0.0 );
    else
    {
      reroute_ = ROUTE_NEW_ROUTE;
      endpoint_.axis[0].p = hiHardLimit_;
      endpoint_.axis[0].v = 0.0;
    }
  }
  else if (nextpoint_.axis[0].p < lowHardLimit_ && nextpoint_.axis[0].v < 0)
  {
    if (homing_) setVelocity(-endpoint_.axis[0].v, 0.0 );
    else
    {
      reroute_ = ROUTE_NEW_ROUTE;
      endpoint_.axis[0].p = lowHardLimit_;
      endpoint_.axis[0].v = 0.0;
    }
  }

  if (nextpoint_.axis[0].v ==  0) {
    if (!deferred_move_) {
      done = 1;
    }
  } else {
    done = 0;
  }

  setDoubleParam (pC_->motorPosition_,         (nextpoint_.axis[0].p+enc_offset_));
  setDoubleParam (pC_->motorEncoderPosition_,  (nextpoint_.axis[0].p+enc_offset_));
  setIntegerParam(pC_->motorStatusDirection_,  (nextpoint_.axis[0].v >  0));
  setIntegerParam(pC_->motorStatusDone_,       done);
  setIntegerParam(pC_->motorStatusHighLimit_,  (nextpoint_.axis[0].p >= hiHardLimit_));
  setIntegerParam(pC_->motorStatusHome_,       (nextpoint_.axis[0].p == home_));
  setIntegerParam(pC_->motorStatusMoving_,     !done);
  setIntegerParam(pC_->motorStatusLowLimit_,   (nextpoint_.axis[0].p <= lowHardLimit_));
  callParamCallbacks();
}

/**
 * Reset the data for an ROI.
 * \param[in] roi number
 * \return asynStatus
 */
asynStatus NDPluginROIStat::clear(epicsUInt32 roi)
{
  asynStatus status = asynSuccess;
  bool stat = true;
  const char* functionName = "NDPluginROIStat::clear";
  
  asynPrint(this->pasynUserSelf, ASYN_TRACE_FLOW, 
        "%s: Clearing params. roi=%d\n", functionName, roi);

  stat = (setDoubleParam(roi, NDPluginROIStatMinValue,  0.0) == asynSuccess) && stat;
  stat = (setDoubleParam(roi, NDPluginROIStatMaxValue,  0.0) == asynSuccess) && stat;
  stat = (setDoubleParam(roi, NDPluginROIStatMeanValue, 0.0) == asynSuccess) && stat;
  stat = (setDoubleParam(roi, NDPluginROIStatTotal,     0.0) == asynSuccess) && stat;
  stat = (setDoubleParam(roi, NDPluginROIStatNet,       0.0) == asynSuccess) && stat;

  stat = (callParamCallbacks(roi) == asynSuccess) && stat;

  if (!stat) {
    asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR, 
          "%s: Error clearing params. roi=%d\n", functionName, roi);
    status = asynError;
  }

  return status;
}

asynStatus ReadASCII::writeInt32(asynUser *pasynUser, epicsInt32 value)
{
	//Checks for updates to the index and on/off of PID lookup
	int function = pasynUser->reason;
	asynStatus status = asynSuccess;
	const char *paramName;
	const char* functionName = "writeInt32";
	int LUTOn;

	/* Set the parameter in the parameter library. */
	status = (asynStatus)setIntegerParam(function, value);

	if (function == P_Index) {
		//check lookup on
		getIntegerParam(P_LookUpOn, &LUTOn);

		if (LUTOn)
		{
			//update all column floats
			setDoubleParam(P_SPOut, pSP_[value]);
			setDoubleParam(P_P, pP_[value]);
			setDoubleParam(P_I, pI_[value]);
			setDoubleParam(P_D, pD_[value]);
			setDoubleParam(P_MaxHeat, pMaxHeat_[value]);
		}
	}else if (function == P_LookUpOn) {
		//reload file if bad
		if (true == fileBad)
		{
			status = readFileBasedOnParameters();
		}

		//file may now be good - retry
		if (false == fileBad)
		{
			//uses the current temperature to find PID values
			if (value)
			{
				double curTemp;

				getDoubleParam(P_CurTemp, &curTemp);
				updatePID(getSPInd(curTemp));
			}
		}
	}

	/* Do callbacks so higher layers see any changes */
	status = (asynStatus)callParamCallbacks();

	if (status)
		epicsSnprintf(pasynUser->errorMessage, pasynUser->errorMessageSize,
		"%s:%s: status=%d, function=%d, name=%s, value=%d",
		driverName, functionName, status, function, paramName, value);
	else
		asynPrint(pasynUser, ASYN_TRACEIO_DRIVER,
		"%s:%s: function=%d, name=%s, value=%d\n",
		driverName, functionName, function, paramName, value);
	return status;

}

asynStatus MMC100Axis::queryPosition() {
  if (pc_->homing_axis_)
    return asynError;

  size_t num_read=0;
  char input[MMC100_STRING_SIZE];
  //static const char* functionName = "MMC100Controller::queryPosition";
  asynStatus ret = pc_->writeRead(input, &num_read, "%dPOS?", id_);
  if (ret != asynSuccess || num_read < 17) // 17 == len("#0.000000,0.000000")
    return asynError;

  // Format: #theory,encoder
  // So, find the comma, replace it with a null terminator, and
  // use atof on each of them.
  char *theory_pos=&input[1];
  char *encoder_pos=strnchr(input, MMC100_STRING_SIZE, ',');
  if (!encoder_pos) {
    return asynError;
  }

  encoder_pos[0] = '\0';
  encoder_pos++;

  encoderPos_=atof(encoder_pos);
  theoryPos_=atof(theory_pos);
  setDoubleParam(pc_->motorEncoderPosition_, encoderPos_ * pc_->unitScale_);
  setDoubleParam(pc_->motorPosition_, encoderPos_ * pc_->unitScale_);
  //setDoubleParam(pc_->motorPosition_, theoryPos_ * pc_->unitScale_);

#if DEBUG
  fprintf(stderr, "encoder: %g theory: %g\n",
              encoderPos_, theoryPos_);
#endif
  return asynSuccess;
}

void ReadASCII::updatePID(int index)
{
	//Updates the PID and max heater values to those in the file on the given line
	setDoubleParam(P_P, pP_[index]);
	setDoubleParam(P_I, pI_[index]);
	setDoubleParam(P_D, pD_[index]);
	setDoubleParam(P_MaxHeat, pMaxHeat_[index]);
}

asynStatus ddriveAxis::queryPosition() {
  asynStatus ret = pc_->writeRead(encoder_pos_, "mess,%d", axisNo_);
  if (ret == asynSuccess) {
    setDoubleParam(pc_->motorEncoderPosition_, encoder_pos_ / DDRIVE_COUNTS_TO_UM);
    setDoubleParam(pc_->motorPosition_, encoder_pos_ / DDRIVE_COUNTS_TO_UM);
  }
	return ret;
}

/** Polls the axis.
  * This function reads the controller position, encoder position, the limit status, the moving status, 
  * and the drive power-on status.  It does not current detect following error, etc. but this could be
  * added.
  * It calls setIntegerParam() and setDoubleParam() for each item that it polls,
  * and then calls callParamCallbacks() at the end.
  * \param[out] moving A flag that is set indicating that the axis is moving (1) or done (0). */
asynStatus C300Axis::poll(bool *moving)
{ 
  int done;
  int num;
  asynStatus comStatus;

  // Read the current encoder position
  sprintf(pC_->outString_, "%s:DATA?", axisName_);
  comStatus = pC_->writeReadController();
  if (comStatus) goto skip;
  // encoder position is the 9th floating point value in a comma separated list
  
  //printf("\naxisName_ = %s\n", axisName_);
  //printf("data string = %s\n", pC_->inString_);

  num = sscanf(&pC_->inString_[C300_DATA_OFFSET], "%lG", &posMonCorrectedVal_); 
  //printf("data string = %s\n", pC_->inString_);
  num = sscanf(&pC_->inString_[C300_CORR_OFFSET], "%lG", &analogInScaledVal_);
  //printf("data string = %s\n", pC_->inString_);
  
  //printf("posMonCorrectedVal_ = %lG\n", posMonCorrectedVal_); 
  //printf("analogInScaledVal_ = %lG\n", analogInScaledVal_);
  //printf("diScaleFactor_ = %f\n", diScaleFactor_); 
  //printf("diScaleFactorInv_ = %f\n", diScaleFactorInv_);
  //printf("bitsPerUnit_ = %f\n", bitsPerUnit_);
  /*encoderPosition_ = (posMonCorrectedVal_ - analogInScaledVal_) * -1.0 * diScaleFactorInv_;*/
  encoderPosition_ = (posMonCorrectedVal_ - analogInScaledVal_) * diScaleFactorInv_;
  //printf("encoderPosition_ = %f\n", encoderPosition_);

  setDoubleParam(pC_->motorEncoderPosition_,encoderPosition_);

  // Read the current theoretical position
  sprintf(pC_->outString_, "%s:POS?", axisName_);
  comStatus = pC_->writeReadController();
  if (comStatus) goto skip;
  theoryPosition_ = atof(pC_->inString_);
  setDoubleParam(pC_->motorPosition_, theoryPosition_);
  //printf("theoryPosition_ = %f\n", theoryPosition_);

  // Read error status

  // Simulate dmov functionality here
  done = (abs(theoryPosition_ - encoderPosition_) > C300Tolerance) ? 0 : 1;
  setIntegerParam(pC_->motorStatusDone_, done);
  *moving = done ? false:true;

  // The limits will be fixed.

  // Motor doesn't have limits or home switch (maybe move this to a constructor)
  setIntegerParam(pC_->motorStatusHighLimit_, 0);
  setIntegerParam(pC_->motorStatusLowLimit_, 0);
  setIntegerParam(pC_->motorStatusAtHome_, 0);

  skip:
  setIntegerParam(pC_->motorStatusProblem_, comStatus ? 1:0);
  callParamCallbacks();
  return comStatus ? asynError : asynSuccess;
}

asynStatus roper::getStatus()
{
    /* NOTE: There seems to be a problem in WinView.  
     * If this function is called immediately after acquisition is started
     * then the detector seems to be instantly done when getAcquireStatus() is called?
     * Work around this by only calling getStatus() from writeInt32 and writeFloat64 if a parameter
     * is actually changed, not when the ADFileNumber or other writes happen */
    short result;
    const char *functionName = "getStatus";
    VARIANT varResult;
    IDispatch *pROIDispatch;
    double top, bottom, left, right;
    long minX, minY, sizeX, sizeY, binX, binY;
    
    try {
        varResult = pExpSetup->GetParam(EXP_REVERSE, &result);
        setIntegerParam(ADReverseX, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_FLIP, &result);
        setIntegerParam(ADReverseY, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_SEQUENTS, &result);
        setIntegerParam(ADNumImages, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_SHUTTER_CONTROL, &result);
        setIntegerParam(RoperShutterMode, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_TIMING_MODE, &result);
        setIntegerParam(ADTriggerMode, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_AUTOD, &result);
        setIntegerParam(RoperAutoDataType, varResult.lVal);
        varResult = pExpSetup->GetParam(EXP_GAIN, &result);
        setDoubleParam(ADGain, (double)varResult.lVal);
        //varResult = pExpSetup->GetParam(EXP_FOCUS_NFRAME, &result);
        varResult = pExpSetup->GetParam(EXP_EXPOSURE, &result);
        setDoubleParam(ADAcquireTime, varResult.dblVal);
        varResult = pExpSetup->GetParam(EXP_ACTUAL_TEMP, &result);
        setDoubleParam(ADTemperature, varResult.dblVal);
        pROIDispatch = pExpSetup->GetROI(1);
        pROIRect->AttachDispatch(pROIDispatch);
        pROIRect->Get(&top, &left, &bottom, &right, &binX, &binY);
        minX = int(left);
        minY = int(top);
        sizeX = int(right)-int(left)+1;
        sizeY = int(bottom)-int(top)+1;
        setIntegerParam(ADMinX, minX);
        setIntegerParam(ADMinY, minY);
        setIntegerParam(ADSizeX, sizeX);
        setIntegerParam(ADSizeY, sizeY);
    }
    catch(CException *pEx) {
        pEx->GetErrorMessage(this->errorMessage, sizeof(this->errorMessage));
        asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR,
            "%s:%s: exception = %s\n", 
            driverName, functionName, this->errorMessage);
        pEx->Delete();
        return(asynError);
    }
    callParamCallbacks();
    return(asynSuccess);
}

/** Simulation task that runs as a separate thread.  When the P_Run parameter is set to 1
  * to rub the simulation it computes a 1 kHz sine wave with 1V amplitude and user-controllable
  * noise, and displays it on
  * a simulated scope.  It computes waveforms for the X (time) and Y (volt) axes, and computes
  * statistics about the waveform. */
void testAsynPortDriver::simTask(void)
{
    /* This thread computes the waveform and does callbacks with it */

    double timePerDiv, voltsPerDiv, voltOffset, triggerDelay, noiseAmplitude;
    double updateTime, minValue, maxValue, meanValue;
    double time, timeStep;
    double noise, yScale;
    int run, i, maxPoints;
    double pi=4.0*atan(1.0);
    
    lock();
    /* Loop forever */    
    while (1) {
        getDoubleParam(P_UpdateTime, &updateTime);
        getIntegerParam(P_Run, &run);
        // Release the lock while we wait for a command to start or wait for updateTime
        unlock();
        if (run) epicsEventWaitWithTimeout(eventId_, updateTime);
        else     (void) epicsEventWait(eventId_);
        // Take the lock again
        lock(); 
        /* run could have changed while we were waiting */
        getIntegerParam(P_Run, &run);
        if (!run) continue;
        getIntegerParam(P_MaxPoints,        &maxPoints);
        getDoubleParam (P_TimePerDiv,       &timePerDiv);
        getDoubleParam (P_VoltsPerDiv,      &voltsPerDiv);
        getDoubleParam (P_VoltOffset,       &voltOffset);
        getDoubleParam (P_TriggerDelay,     &triggerDelay);
        getDoubleParam (P_NoiseAmplitude,   &noiseAmplitude);
        time = triggerDelay;
        timeStep = timePerDiv * NUM_DIVISIONS / maxPoints;
        minValue = 1e6;
        maxValue = -1e6;
        meanValue = 0.;
    
        yScale = 1.0 / voltsPerDiv;
        for (i=0; i<maxPoints; i++) {
            noise = noiseAmplitude * (rand()/(double)RAND_MAX - 0.5);
            pData_[i] = AMPLITUDE * (sin(time*FREQUENCY*2*pi)) + noise;
            /* Compute statistics before doing the yOffset and yScale */
            if (pData_[i] < minValue) minValue = pData_[i];
            if (pData_[i] > maxValue) maxValue = pData_[i];
            meanValue += pData_[i];
            pData_[i] = NUM_DIVISIONS/2 + yScale * (voltOffset + pData_[i]);
            time += timeStep;
        }
        updateTimeStamp();
        meanValue = meanValue/maxPoints;
        setDoubleParam(P_MinValue, minValue);
        setDoubleParam(P_MaxValue, maxValue);
        setDoubleParam(P_MeanValue, meanValue);
        callParamCallbacks();
        doCallbacksFloat64Array(pData_, maxPoints, P_Waveform, 0);
    }
}

/** Constructor for NDPluginAttribute; most parameters are simply passed to NDPluginDriver::NDPluginDriver.
  *
  * \param[in] portName The name of the asyn port driver to be created.
  * \param[in] queueSize The number of NDArrays that the input queue for this plugin can hold when
  *            NDPluginDriverBlockingCallbacks=0.  Larger queues can decrease the number of dropped arrays,
  *            at the expense of more NDArray buffers being allocated from the underlying driver's NDArrayPool.
  * \param[in] blockingCallbacks Initial setting for the NDPluginDriverBlockingCallbacks flag.
  *            0=callbacks are queued and executed by the callback thread; 1 callbacks execute in the thread
  *            of the driver doing the callbacks.
  * \param[in] NDArrayPort Name of asyn port driver for initial source of NDArray callbacks.
  * \param[in] NDArrayAddr asyn port driver address for initial source of NDArray callbacks.
  * \param[in] maxAttributes The maximum number of attributes that this plugin will support
  * \param[in] maxBuffers The maximum number of NDArray buffers that the NDArrayPool for this driver is
  *            allowed to allocate. Set this to -1 to allow an unlimited number of buffers.
  * \param[in] maxMemory The maximum amount of memory that the NDArrayPool for this driver is
  *            allowed to allocate. Set this to -1 to allow an unlimited amount of memory.
  * \param[in] priority The thread priority for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
  * \param[in] stackSize The stack size for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
  */
NDPluginAttribute::NDPluginAttribute(const char *portName, int queueSize, int blockingCallbacks,
                                     const char *NDArrayPort, int NDArrayAddr, int maxAttributes,
                                     int maxBuffers, size_t maxMemory,
                                     int priority, int stackSize)
    /* Invoke the base class constructor */
    : NDPluginDriver(portName, queueSize, blockingCallbacks,
                   NDArrayPort, NDArrayAddr, maxAttributes, maxBuffers, maxMemory,
                   asynInt32ArrayMask | asynFloat64Mask | asynFloat64ArrayMask | asynGenericPointerMask,
                   asynInt32ArrayMask | asynFloat64Mask | asynFloat64ArrayMask | asynGenericPointerMask,
                   ASYN_MULTIDEVICE, 1, priority, stackSize, 1)
{
  int i;
  static const char *functionName = "NDPluginAttribute::NDPluginAttribute";

  maxAttributes_ = maxAttributes;
  if (maxAttributes_ < 1) maxAttributes_ = 1;
  /* parameters */
  createParam(NDPluginAttributeAttrNameString,       asynParamOctet,        &NDPluginAttributeAttrName);
  createParam(NDPluginAttributeResetString,          asynParamInt32,        &NDPluginAttributeReset);
  createParam(NDPluginAttributeValString,            asynParamFloat64,      &NDPluginAttributeVal);
  createParam(NDPluginAttributeValSumString,         asynParamFloat64,      &NDPluginAttributeValSum);
  createParam(NDPluginAttributeTSControlString,      asynParamInt32,        &NDPluginAttributeTSControl);
  createParam(NDPluginAttributeTSNumPointsString,    asynParamInt32,        &NDPluginAttributeTSNumPoints);
  createParam(NDPluginAttributeTSCurrentPointString, asynParamInt32,        &NDPluginAttributeTSCurrentPoint);
  createParam(NDPluginAttributeTSAcquiringString,    asynParamInt32,        &NDPluginAttributeTSAcquiring);
  createParam(NDPluginAttributeTSArrayValueString,   asynParamFloat64Array, &NDPluginAttributeTSArrayValue);

  /* Set the plugin type string */
  setStringParam(NDPluginDriverPluginType, "NDPluginAttribute");

  setIntegerParam(NDPluginAttributeTSNumPoints, DEFAULT_NUM_TSPOINTS);
  pTSArray_ = static_cast<epicsFloat64 **>(calloc(maxAttributes_, sizeof(epicsFloat64 *)));
  if (pTSArray_ == NULL) {
    perror(functionName);
    asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR, "%s: Error from calloc for pTSArray_.\n", functionName);
  }
  for (i=0; i<maxAttributes_; i++) {
    pTSArray_[i] = static_cast<epicsFloat64*>(calloc(DEFAULT_NUM_TSPOINTS, sizeof(epicsFloat64)));
    setDoubleParam(i, NDPluginAttributeVal, 0.0);
    setDoubleParam(i, NDPluginAttributeValSum, 0.0);
    setStringParam(i, NDPluginAttributeAttrName, "");
    if (pTSArray_[i] == NULL) {
      perror(functionName);
      asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR, "%s: Error from calloc for pTSArray_.\n", functionName);
    }
    callParamCallbacks(i);
  }

  // Disable ArrayCallbacks.  
  // This plugin currently does not do array callbacks, so make the setting reflect the behavior
  setIntegerParam(NDArrayCallbacks, 0);

  /* Try to connect to the array port */
  connectToArrayPort();

}

asynStatus NDPluginCircularBuff::calculateTrigger(NDArray *pArray, int *trig)
{
    NDAttribute *trigger;
    char triggerString[256];
    double triggerValue;
    double calcResult;
    int status;
    int preTrigger, postTrigger, currentImage, triggered;
    static const char *functionName="calculateTrigger";
    
    *trig = 0;
    
    getIntegerParam(NDCircBuffPreTrigger,   &preTrigger);
    getIntegerParam(NDCircBuffPostTrigger,  &postTrigger);
    getIntegerParam(NDCircBuffCurrentImage, &currentImage);
    getIntegerParam(NDCircBuffTriggered,    &triggered);   

    triggerCalcArgs_[0] = epicsNAN;
    triggerCalcArgs_[1] = epicsNAN;
    triggerCalcArgs_[2] = preTrigger;
    triggerCalcArgs_[3] = postTrigger;
    triggerCalcArgs_[4] = currentImage;
    triggerCalcArgs_[5] = triggered;

    getStringParam(NDCircBuffTriggerA, sizeof(triggerString), triggerString);
    trigger = pArray->pAttributeList->find(triggerString);
    if (trigger != NULL) {
        status = trigger->getValue(NDAttrFloat64, &triggerValue);
        if (status == asynSuccess) {
            triggerCalcArgs_[0] = triggerValue;
        }
    }
    getStringParam(NDCircBuffTriggerB, sizeof(triggerString), triggerString);
    trigger = pArray->pAttributeList->find(triggerString);
    if (trigger != NULL) {
        status = trigger->getValue(NDAttrFloat64, &triggerValue);
        if (status == asynSuccess) {
            triggerCalcArgs_[1] = triggerValue;
        }
    }
    
    setDoubleParam(NDCircBuffTriggerAVal, triggerCalcArgs_[0]);
    setDoubleParam(NDCircBuffTriggerBVal, triggerCalcArgs_[1]);
    status = calcPerform(triggerCalcArgs_, &calcResult, triggerCalcPostfix_);
    if (status) {
        asynPrint(pasynUserSelf, ASYN_TRACE_ERROR,
            "%s::%s error evaluating expression=%s\n",
            driverName, functionName, calcErrorStr(status));
        return asynError;
    }
    
    if (!isnan(calcResult) && !isinf(calcResult) && (calcResult != 0)) *trig = 1;
    setDoubleParam(NDCircBuffTriggerCalcVal, calcResult);

    return asynSuccess;
}

asynStatus shamrock::getStatus()
{
    int error;
    asynStatus status;
    int grating;
    float wavelength;
    float width;
    int i;
    static const char *functionName = "getStatus";
    int port;

    //Get Flipper Status
    for (i=0; i<MAX_FLIPPER_MIRRORS; i++) {
        if (flipperMirrorIsPresent_[i] == 0) continue;
        error = ShamrockGetFlipperMirror(shamrockId_, i+1, &port);
        status = checkError(error, functionName, "ShamrockGetFlipperMirror");
        if (status) return asynError;
        setIntegerParam(i, SRFlipperMirrorPort_, port);
    }


    error = ShamrockGetGrating(shamrockId_, &grating);
    status = checkError(error, functionName, "ShamrockGetGrating");
    if (status) return asynError;
    setIntegerParam(SRGrating_, grating);
    
    error = ShamrockGetWavelength(shamrockId_, &wavelength);
    status = checkError(error, functionName, "ShamrockGetWavelength");
    if (status) return asynError;
    setDoubleParam(SRWavelength_, wavelength);

    for (i=0; i<MAX_SLITS; i++) {
        setDoubleParam(i, SRSlitSize_, 0.);
        if (slitIsPresent_[i] == 0) continue;
        error = ShamrockGetAutoSlitWidth(shamrockId_, i+1, &width);
        status = checkError(error, functionName, "ShamrockGetAutoSlitWidth");
        if (status) return asynError;
        setDoubleParam(i, SRSlitSize_, width);
    }
    
    error = ShamrockGetCalibration(shamrockId_, calibration_, numPixels_);
    status = checkError(error, functionName, "ShamrockGetCalibration");
    setDoubleParam(0, SRMinWavelength_, calibration_[0]);
    setDoubleParam(0, SRMaxWavelength_, calibration_[numPixels_-1]);
    // We need to find a C/C++ library to do 3'rd order polynomial fit
    // For now we do a first order fit!
    //double slope = (calibration_[numPixels_-1] - calibration_[0]) / (numPixels_-1);

    for (i=0; i<MAX_ADDR; i++) {
        callParamCallbacks(i);
    }
    
    doCallbacksFloat32Array(calibration_, numPixels_, SRCalibration_, 0);

    return asynSuccess;
}

/** Constructor for NDPluginAttribute; most parameters are simply passed to NDPluginDriver::NDPluginDriver.
  *
  * \param[in] portName The name of the asyn port driver to be created.
  * \param[in] queueSize The number of NDArrays that the input queue for this plugin can hold when
  *            NDPluginDriverBlockingCallbacks=0.  Larger queues can decrease the number of dropped arrays,
  *            at the expense of more NDArray buffers being allocated from the underlying driver's NDArrayPool.
  * \param[in] blockingCallbacks Initial setting for the NDPluginDriverBlockingCallbacks flag.
  *            0=callbacks are queued and executed by the callback thread; 1 callbacks execute in the thread
  *            of the driver doing the callbacks.
  * \param[in] NDArrayPort Name of asyn port driver for initial source of NDArray callbacks.
  * \param[in] NDArrayAddr asyn port driver address for initial source of NDArray callbacks.
  * \param[in] maxBuffers The maximum number of NDArray buffers that the NDArrayPool for this driver is
  *            allowed to allocate. Set this to -1 to allow an unlimited number of buffers.
  * \param[in] maxMemory The maximum amount of memory that the NDArrayPool for this driver is
  *            allowed to allocate. Set this to -1 to allow an unlimited amount of memory.
  * \param[in] priority The thread priority for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
  * \param[in] stackSize The stack size for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
  * \param[in] maxTimeSeries The max size of the time series array
  * \param[in] attrName The name of the NDArray attribute
  */
NDPluginAttribute::NDPluginAttribute(const char *portName, int queueSize, int blockingCallbacks,
                                     const char *NDArrayPort, int NDArrayAddr,
                                     int maxBuffers, size_t maxMemory,
                                     int priority, int stackSize, 
                                     int maxTimeSeries, const char *attrName)
    /* Invoke the base class constructor */
    : NDPluginDriver(portName, queueSize, blockingCallbacks,
                   NDArrayPort, NDArrayAddr, 1, NUM_NDPLUGIN_ATTR_PARAMS, maxBuffers, maxMemory,
                   asynInt32ArrayMask | asynFloat64Mask | asynFloat64ArrayMask | asynGenericPointerMask,
                   asynInt32ArrayMask | asynFloat64Mask | asynFloat64ArrayMask | asynGenericPointerMask,
                   ASYN_MULTIDEVICE, 1, priority, stackSize)
{
    static const char *functionName = "NDPluginAttribute::NDPluginAttribute";

    /* parameters */
    createParam(NDPluginAttributeNameString,              asynParamOctet, &NDPluginAttributeName);
    createParam(NDPluginAttributeAttrNameString, asynParamOctet, &NDPluginAttributeAttrName);
    createParam(NDPluginAttributeResetString,          asynParamInt32, &NDPluginAttributeReset);
    createParam(NDPluginAttributeUpdateString,          asynParamInt32, &NDPluginAttributeUpdate);
    createParam(NDPluginAttributeValString,          asynParamFloat64, &NDPluginAttributeVal);
    createParam(NDPluginAttributeValSumString,          asynParamFloat64, &NDPluginAttributeValSum);
    createParam(NDPluginAttributeArrayString,          asynParamFloat64Array, &NDPluginAttributeArray);
    createParam(NDPluginAttributeDataTypeString,          asynParamInt32, &NDPluginAttributeDataType);
    createParam(NDPluginAttributeUpdatePeriodString,          asynParamFloat64, &NDPluginAttributeUpdatePeriod);
    
   
    /* Set the plugin type string */
    setStringParam(NDPluginDriverPluginType, "NDPluginAttribute");

    maxTimeSeries_ = maxTimeSeries;
    pTimeSeries_ = static_cast<epicsFloat64*>(calloc(maxTimeSeries_, sizeof(epicsFloat64)));
    if (pTimeSeries_ == NULL) {
      perror(functionName);
      asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR, "%s: Error from calloc for pTimeSeries_.\n", functionName);
    }

    currentPoint_ = 0;
    arrayUpdate_ = 1;
    valueSum_ = 0.0;

    /* Set the attribute name */
    /* This can be set at runtime too.*/
    setStringParam(NDPluginAttributeAttrName, attrName);

    setDoubleParam(NDPluginAttributeVal, 0.0);
    setDoubleParam(NDPluginAttributeValSum, 0.0);

    /* Try to connect to the array port */
    connectToArrayPort();

    callParamCallbacks();

}

/** This thread reads status strings from the status socket, makes the string available to EPICS, and
  * sends an eveny when it detects acquisition complete, etc. */
void BISDetector::statusTask()
{
    int status = asynSuccess;
    char response[MAX_MESSAGE_SIZE];
    char *p;
    double timeout=-1.0;
    size_t nread;
    int eomReason;
    int acquire;
    int framesize;
    int open;
    double temperature;

    while(1) {
        status = pasynOctetSyncIO->read(this->pasynUserStatus, response,
                                        sizeof(response), timeout,
                                        &nread, &eomReason);
        if (status == asynSuccess) {
            this->lock();
            setStringParam(BISStatus, response);
            getIntegerParam(ADAcquire, &acquire);
            if (strstr(response, "[INSTRUMENTQUEUE /PROCESSING=0]")) {
                if (acquire) {
                    epicsEventSignal(this->readoutEventId);
                }
            } 
            else if (strstr(response, "[CCDTEMPERATURE")) {
                p = strstr(response, "DEGREESC=");
                sscanf(p, "DEGREESC=%lf", &temperature);
                setDoubleParam(ADTemperature, temperature);
            }
            else if (strstr(response, "[DETECTORSTATUS")) {
                p = strstr(response, "FRAMESIZE=");
                sscanf(p, "FRAMESIZE=%d", &framesize);
                p = strstr(response, "CCDTEMP=");
                sscanf(p, "CCDTEMP=%lf", &temperature);
                setIntegerParam(ADSizeX, framesize);
                setIntegerParam(ADSizeY, framesize);
                setDoubleParam(ADTemperature, temperature);
            }
            else if (strstr(response, "[SHUTTERSTATUS")) {
                p = strstr(response, "STATUS=");
                sscanf(p, "STATUS=%d", &open);
                setIntegerParam(ADShutterStatus, open);
            }
            callParamCallbacks();
            /* Sleep a short while to allow EPICS record to process 
             * before sending the next string */
            epicsThreadSleep(0.01);
            this->unlock();
        }
    }
}