/// <summary>
/// 配置Ao输出任务
/// </summary>
/// <returns></returns>
private API_RETURN_CODE ConfigAoTask()
{
API_RETURN_CODE code = API_RETURN_CODE.API_SUCCESS;
try
{
m_aoTask = new Task();
m_aoTask.AOChannels.CreateVoltageChannel(GetAoPhysicalChannelName(), "", -10.0, 10.0, AOVoltageUnits.Volts);
m_aoTask.Control(TaskAction.Verify);
m_aoTask.Timing.SampleClockRate = m_params.AoSampleRate;
m_aoTask.Timing.ConfigureSampleClock("",
m_aoTask.Timing.SampleClockRate,
SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples,
m_params.AoSampleCountPerFrame);
// 路由Ao Sample Clcok到PFI0
//if (m_config.Debugging)
//{
// Logger.Info(string.Format("route ao sample clock to PFI0."));
// m_aoTask.ExportSignals.SampleClockOutputTerminal = string.Concat("/", NI_CARD_NAME_DEFAULT, "/", "PFI0");
//}
//string source = m_sysConfig.GetStartSyncSignal();
//m_aoTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger(source, DigitalEdgeStartTriggerEdge.Rising);
// 写入波形
AnalogMultiChannelWriter writer = new AnalogMultiChannelWriter(m_aoTask.Stream);
AnalogWaveform <double>[] waves;
if (m_config.GetScanMirrorNum() == SCAN_MIRROR_NUM.THREEE)
{
waves = new AnalogWaveform <double> [3];
waves[2] = AnalogWaveform <double> .FromArray1D(m_waver.Y2Wave);
}
else
{
waves = new AnalogWaveform <double> [2];
}
waves[0] = AnalogWaveform <double> .FromArray1D(m_waver.XWave);
waves[1] = AnalogWaveform <double> .FromArray1D(m_waver.Y1Wave);
writer.WriteWaveform(false, waves);
}
catch (Exception e)
{
Logger.Error(string.Format("config ao task exception: [{0}].", e));
code = API_RETURN_CODE.API_FAILED_NI_CONFIG_AO_TASK_EXCEPTION;
}
return(code);
}
private void Start()
{
Cursor.Current = Cursors.WaitCursor;
try
{
// 创建模拟输出任务
galvTask = new Task();
// 创建模拟电压输出通道
galvTask.AOChannels.CreateVoltageChannel("Dev1/ao0:2", "", -10.0, 10.0, AOVoltageUnits.Volts);
// 验证任务
galvTask.Control(TaskAction.Verify);
double desiredFrequency = aoSampleRate / sampleCountPerAO;
double samplesPerBuffer = sampleCountPerAO;
double cyclesPerBuffer = 1.0;
WaveGenerator wave = new WaveGenerator(
galvTask.Timing, desiredFrequency, samplesPerBuffer, cyclesPerBuffer, WaveformType.GalvWave, 2.0);
// configure the sample clock with the calculated rate
galvTask.Timing.ConfigureSampleClock("",
wave.ResultingSampleClockRate,
SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples, sampleCountPerAO);
AnalogMultiChannelWriter writer = new AnalogMultiChannelWriter(galvTask.Stream);
AnalogWaveform <double>[] waves = new AnalogWaveform <double> [3];
waves[0] = AnalogWaveform <double> .FromArray1D(xWaves);
waves[1] = AnalogWaveform <double> .FromArray1D(y1Waves);
waves[2] = AnalogWaveform <double> .FromArray1D(y2Waves);
//write data to buffer
writer.WriteWaveform(false, waves);
//start writing out data
galvTask.Start();
}
catch (DaqException e)
{
Logger.Error(string.Format("daq exception [{0}].", e));
MessageBox.Show(e.Message);
galvTask.Dispose();
}
Cursor.Current = Cursors.Default;
}
private void DaqInit()
{
try
{
daqTask = new NationalInstruments.DAQmx.Task();
daqTask2 = new NationalInstruments.DAQmx.Task();
daqTask3 = new NationalInstruments.DAQmx.Task();
daqTask.AIChannels.CreateVoltageChannel("Dev1/ai0", "", (AITerminalConfiguration)(-1), -10, 10, AIVoltageUnits.Volts);
daqTask.AIChannels.CreateVoltageChannel("Dev1/ai1", "", (AITerminalConfiguration)(-1), -10, 10, AIVoltageUnits.Volts);
daqTask2.AOChannels.CreateVoltageChannel("Dev1/ao0", "", -10, 10, AOVoltageUnits.Volts);
daqTask2.AOChannels.CreateVoltageChannel("Dev1/ao1", "", -10, 10, AOVoltageUnits.Volts);
daqTask.Timing.ConfigureSampleClock("", sampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.FiniteSamples, sampleRate);
daqTask.AIChannels.All.DataTransferMechanism = AIDataTransferMechanism.Dma;
daqTask2.Timing.ConfigureSampleClock("", sampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples, sampleRate);
daqTask2.AOChannels.All.DataTransferMechanism = AODataTransferMechanism.Dma;
daqTask2.Stream.WriteRegenerationMode = WriteRegenerationMode.DoNotAllowRegeneration;
reader = new AnalogMultiChannelReader(daqTask.Stream);
int inBufSize1 = sampleRate, inBufSize2 = 2 * sampleRate;
inDriveSignal = reader.ReadWaveform(inBufSize1);
/*fftw_plan mplan;
* double[] din = new double[inBufSize1];
* double[] freq = new double[inBufSize1*2];
* GCHandle hdin = GCHandle.Alloc(din, GCHandleType.Pinned);
* GCHandle hdout = GCHandle.Alloc(freq, GCHandleType.Pinned);
* fftw_complexarray min = new fftw_complexarray(din);
* fftw_complexarray mout = new fftw_complexarray(freq);
* IntPtr fplan5 = fftw.dft_r2c_1d(sampleRate, hdin.AddrOfPinnedObject(), hdout.AddrOfPinnedObject(), fftw_flags.Estimate);
* Array.Copy(inDriveSignal[0].GetRawData(), din, inBufSize1);
* fftw.execute(fplan5);
* measuredFreq1 = (double)Util.AbsMaxIndex(freq) / 2;*/
/*int rem = (int)((double)(measuredFreq1 - (int)measuredFreq1) * 1000);
* int mul;
* if (rem > 0)
* {
* mul = 1000 / (int)Integers.GCD(rem, 1000);
* measuredFreq1 *= mul;
*
* }*/
//Array.Copy(inDriveSignal[1].GetRawData(), din, inBufSize1);
//fftw.execute(fplan5);
//measuredFreq2 = (double)Util.AbsMaxIndex(freq) / 2;
ZX1 = Util.GetZeroCrossings(inDriveSignal[0].GetRawData());
ZX2 = Util.GetZeroCrossings(inDriveSignal[1].GetRawData());
/*rem = (int)((double)(measuredFreq2 - (int)measuredFreq2) * 1000);
* if (rem > 0)
* {
* mul = 1000 / (int)Integers.GCD(rem, 1000);
* measuredFreq2 *= mul;
* }*/
//samplePerChannel = (int)Math.Max(ch1, ch2);
//sampleRate = 500*(int)Integers.LCM((long)measuredFreq1, (long)measuredFreq2);
samplePerChannel = sampleRate / 25;
daqTask2.EveryNSamplesWrittenEventInterval = samplePerChannel;
daqTask2.EveryNSamplesWritten += daqTask2_EveryNSamplesWritten;
writer = new AnalogMultiChannelWriter(daqTask2.Stream);
bufsize = sampleRate;
waveX = new double[180][];
waveY = new double[180][];
outWave = new double[2, samplePerChannel];
for (int i = 0; i < 180; i++)
{
waveX[i] = new double[bufsize];
waveY[i] = new double[bufsize];
}
waveX[0] = inDriveSignal[0].GetRawData(0, bufsize);
waveY[0] = inDriveSignal[1].GetRawData(0, bufsize);
//Array.Copy(waveX[0], waveX[0].Length / 2, waveY[0], 0, waveY[0].Length / 2);
//Array.Copy(waveX[0], 0, waveY[0], waveY[0].Length / 2, waveY[0].Length / 2);
// initialize rotations
for (int i = 1; i < 180; i++)
{
for (int j = 0; j < bufsize; j++)
{
double theta = ((i) / 180.0) * Math.PI;
double x = waveX[0][j]; double y = waveY[0][j];
waveX[i][j] = x * Math.Cos(theta) - y * Math.Sin(theta);
waveY[i][j] = x * Math.Sin(theta) + y * Math.Cos(theta);
}
}
double[] X = new double[samplePerChannel];
double[] Y = new double[samplePerChannel];
Array.Copy(waveX[0], ZX1[1], X, 0, samplePerChannel);
Array.Copy(waveY[0], ZX2[1], Y, 0, samplePerChannel);
sampleIndex = samplePerChannel;
sampleIndex2 = samplePerChannel;
AnalogWaveform <double>[] waves = { AnalogWaveform <double> .FromArray1D(X), AnalogWaveform <double> .FromArray1D(Y) };
writer.WriteWaveform <double>(false, waves);
daqTask.Timing.ConfigureSampleClock("", sampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.HardwareTimedSinglePoint, 0);
double[] sample;
bool negative = false;
daqTask2.Start();
//daqTask2.AOChannels.All.DataTransferMechanism = AODataTransferMechanism.Dma;
dcOffsetX = dcOffsetY = 0;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}