private API_RETURN_CODE ConfigCiTask(string ciChannel, string ciSrc, string ciClock, ref Task ciTask, ref CounterSingleChannelReader ciMultiChannelReader)
{
API_RETURN_CODE code = API_RETURN_CODE.API_SUCCESS;
try
{
ciTask = new Task();
ciTask.CIChannels.CreateCountEdgesChannel(ciChannel, "", CICountEdgesActiveEdge.Rising, 0, CICountEdgesCountDirection.Up);
ciTask.Control(TaskAction.Verify);
ciTask.Timing.SampleClockRate = m_params.CtrSampleRate;
ciTask.Timing.ConfigureSampleClock(ciClock,
ciTask.Timing.SampleClockRate,
SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples,
m_params.ValidScanPixelsPerFrame);
ciTask.Stream.ConfigureInputBuffer(m_params.ValidScanPixelsPerFrame);
// CIDataTransferMechanism x = ciTask.CIChannels.All.DataTransferMechanism;
// 指定CI Channel使用的物理输入终端[APD的脉冲接收端]
ciTask.CIChannels[0].CountEdgesTerminal = ciSrc;
// 设置Ci Pause Trigger源为PFIx，PFIx与Acq Trigger[一般是Do]物理直连，接收Do的输出信号，作为触发
// 低电平使能Pause Trigger,高电平禁能
// ciTask.Triggers.PauseTrigger.ConfigureDigitalLevelTrigger(ciGate, DigitalLevelPauseTriggerCondition.Low);
// 设置Arm Start Trigger，使CI与AO、DO同时启动工作
string source = m_sysConfig.GetStartSyncSignal();
ciTask.Triggers.ArmStartTrigger.ConfigureDigitalEdgeTrigger(source, DigitalEdgeArmStartTriggerEdge.Rising);
ciTask.EveryNSamplesReadEventInterval = m_params.ScanPixelsPerAcquisition;
ciTask.EveryNSamplesRead += new EveryNSamplesReadEventHandler(CiEveryNSamplesRead);
ciMultiChannelReader = new CounterSingleChannelReader(ciTask.Stream);
ciMultiChannelReader.SynchronizeCallbacks = false;
}
catch (Exception e)
{
Logger.Error(string.Format("config ci task[{0}] exception: [{1}].", ciChannel, e));
code = API_RETURN_CODE.API_FAILED_NI_CONFIG_CI_TASK_EXCEPTION;
}
return(code);
}
// this method configures and starts the counter.
private void StartCounter()
{
// set up the counter - the fast oscillator is fed into a counter's source input
counterTask = new Task("PhaseLock task");
CounterChannel oscillatorChannel =
((CounterChannel)Environs.Hardware.CounterChannels["phaseLockOscillator"]);
counterTask.CIChannels.CreateCountEdgesChannel(
oscillatorChannel.PhysicalChannel,
oscillatorChannel.Name,
CICountEdgesActiveEdge.Rising,
0,
CICountEdgesCountDirection.Up
);
// this counter is sample-clocked by the slow reference that we are locking to.
// the buffer is set to be "large"
CounterChannel referenceChannel =
((CounterChannel)Environs.Hardware.CounterChannels["phaseLockReference"]);
counterTask.Timing.ConfigureSampleClock(
referenceChannel.PhysicalChannel,
SAMPLE_CLOCK_RATE,
SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples,
1000
);
counterReader = new CounterSingleChannelReader(counterTask.Stream);
counterReader.SynchronizeCallbacks = true;
if (!Environs.Debug)
{
counterReader.BeginReadMultiSampleInt32(
SAMPLE_MULTI_READ,
new AsyncCallback(CounterCallBack),
null
);
}
}
