public static void ConfigureMeasurement(NIScope scope, MeasurementConfiguration measurementConfig, string channelNames = "0")
{
switch (measurementConfig.ScopeTriggerType)
{
case ScopeTriggerType.DigitalEdge:
scope.Trigger.ConfigureTriggerDigital(ScopeTriggerSource.FromString(measurementConfig.ScopeTriggerSource),
measurementConfig.TriggerEdge, PrecisionTimeSpan.Zero, PrecisionTimeSpan.Zero);
break;
case ScopeTriggerType.Immediate:
scope.Trigger.ConfigureTriggerImmediate();
break;
case ScopeTriggerType.Software:
scope.Trigger.ConfigureTriggerSoftware(PrecisionTimeSpan.Zero, PrecisionTimeSpan.Zero);
break;
default:
throw new System.NotImplementedException("The functionality for the requested NI-SCOPE trigger type has not been implemented.");
}
scope.Acquisition.SampleRateMin = measurementConfig.SampleRate_Hz;
scope.Acquisition.NumberOfPointsMin = (long)Math.Round(scope.Acquisition.SampleRate * measurementConfig.MeasurementTime_s);
scope.Timing.NumberOfRecordsToAcquire = 1;
}
public void StartAcquisition(string channelName, double sampleRate, double referencePosition,
double range, int numberOfPoints, int numberOfRecords)
{
try
{
scopeDevices = new ModularInstrumentsSystem("NI-Scope");
scopeName = scopeDevices.DeviceCollection[0].Name;
scopeSession = new NIScope(scopeName, false, true);
scopeSession.DriverOperation.Warning += new EventHandler <ScopeWarningEventArgs>(DriverOperation_Warning);
scopeSession.Channels[channelName].InputImpedance = 50;
double offset = 0.0;
ScopeVerticalCoupling coupling = ScopeVerticalCoupling.DC;
double probeAttenuation = 1.0;
scopeSession.Channels[channelName].Configure(range, offset, coupling, probeAttenuation, true);
// scopeSession.Channels[channelName]
bool enforceRealtime = true;
scopeSession.Timing.ConfigureTiming
(sampleRate, numberOfPoints, referencePosition, numberOfRecords, enforceRealtime);
double triggerLevel = 1.6;
ScopeTriggerSlope triggerSlope = ScopeTriggerSlope.Positive;
ScopeTriggerCoupling triggerCoupling = ScopeTriggerCoupling.DC;
PrecisionTimeSpan triggerHoldoff = PrecisionTimeSpan.Zero;
PrecisionTimeSpan triggerDelay = PrecisionTimeSpan.Zero;
ScopeTriggerSource triggerSource = ScopeTriggerSource.External;
scopeSession.Trigger.EdgeTrigger.Configure
(triggerSource, triggerLevel, triggerSlope, triggerCoupling, triggerHoldoff, triggerDelay);
recordLength = scopeSession.Acquisition.RecordLength;
sampleRate = scopeSession.Acquisition.SampleRate;
this.channelName = channelName;
scopeSession.Measurement.Initiate();
timeout = new PrecisionTimeSpan(5.0);
}
catch (Exception ex)
{
ShowError(ex);
}
}
private static void MapAndConfigTrigger(NIScope scopeSession, AITriggerConfiguration triggerConfiguration, ref TClock tClockSession)
{
//配置触发沿
ScopeTriggerSlope triggerSlope;
switch (triggerConfiguration.TriggerEdge)
{
case Edge.Rising:
triggerSlope = ScopeTriggerSlope.Positive;
break;
case Edge.Falling:
triggerSlope = ScopeTriggerSlope.Negative;
break;
default:
throw new Exception("触发沿 TriggerEdge 设置错误！");
}
//设置触发源
ScopeTriggerSource triggerSource = triggerConfiguration.TriggerSource.ToString();
//设置触发模式
switch (triggerConfiguration.TriggerType)
{
case AITriggerType.Immediate:
scopeSession.Trigger.Type = ScopeTriggerType.Immediate;
scopeSession.Trigger.ConfigureTriggerImmediate();
break;
case AITriggerType.DigitalTrigger:
scopeSession.Trigger.Type = ScopeTriggerType.DigitalEdge;
scopeSession.Trigger.ConfigureTriggerDigital(triggerSource, triggerSlope, PrecisionTimeSpan.Zero, new PrecisionTimeSpan(triggerConfiguration.Delay));
break;
case AITriggerType.AnalogTrigger:
scopeSession.Trigger.Type = ScopeTriggerType.Edge;
scopeSession.Trigger.EdgeTrigger.Configure(triggerSource, 2.5, triggerSlope, ScopeTriggerCoupling.DC, PrecisionTimeSpan.Zero, new PrecisionTimeSpan(triggerConfiguration.Delay));
break;
default:
throw new Exception("触发模式 TriggerType 设置错误！");
}
//如果不是非同步
//加入到TClock中
if (triggerConfiguration.MasterOrSlave != AITriggerMasterOrSlave.NonSync)
{
lock (TClockDevice.Lock)
{
if (TClockDevice.SyncDevices == null)
{
TClockDevice.SyncDevices = new List <NIScope>();
}
TClockDevice.SyncDevices.Add(scopeSession);
}
}
//如果是主卡，则将所有的 SynchronizableDevices 实例化出来，这样写也就决定了只能有一个 Master（ NI 机箱可级联支持双 Master）
//这一行必须是在所有需要同步的卡 scopeSession 设置完毕之后
if (triggerConfiguration.MasterOrSlave == AITriggerMasterOrSlave.Master)
{
TClockDevice.IsMasterReady = false;
TClockDevice.IsSlaveCanAddIntoTDevice = true;
//因为主卡可能会和从卡同时被 Arm，因此先等待所有从卡设备加入 TClockDevice
Thread.Sleep(1000);
TClockDevice.IsSlaveCanAddIntoTDevice = false;
ITClockSynchronizableDevice[] scopeSynchronizableDevices = new ITClockSynchronizableDevice[TClockDevice.SyncDevices.Count];
for (int i = 0; i < TClockDevice.SyncDevices.Count; i++)
{
scopeSynchronizableDevices[i] = TClockDevice.SyncDevices[i];
}
tClockSession = new TClock(scopeSynchronizableDevices);
tClockSession.ConfigureForHomogeneousTriggers();
tClockSession.Synchronize();
}
}
