private void button4_Click(object sender, EventArgs e)
{
try
{
button4.Enabled = false;
NationalInstruments.AnalogWaveform <double>[] generatedData = new NationalInstruments.AnalogWaveform <double> [anlog_OutputComponent1.NumberOfChannelsToWrite];
// TODO: Populate data to write.
//throw new System.NotImplementedException("You must populate the data to write before writing the data.");
int numberOfPoints = 100;
AnalogWaveform <double> analogWaveform = new AnalogWaveform <double>(numberOfPoints);
for (int i = 0; i < numberOfPoints; i++)
{
analogWaveform.Samples[i].Value = 3;
}
generatedData[0] = analogWaveform;
generatedData[1] = analogWaveform;
anlog_OutputComponent1.WriteAsync(generatedData);
waveformGraph2.PlotWaveforms(generatedData);
}
catch (NationalInstruments.DAQmx.DaqException ex)
{
MessageBox.Show(ex.Message, "DAQ Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
button4.Enabled = true;
}
}
public double ReadTemperature()
{
// Reads data from the analogue input channel.
data = reader.ReadWaveform(samplesPerChannel);
// Converts data into a filtered voltage.
double voltage = Program.filterVoltage(data.Samples[1].Value);
// Calculates temperature based on voltage and set constants.
double B = 0.0;
double R0 = 0.0;
double T0 = 298.15;
if (channelText == "Ainport0")
{
B = 3380;
R0 = 10000;
}
if (channelText == "Ainport1")
{
B = 4380;
R0 = 100000;
}
if (channelText == "Ainport2")
{
B = 3960;
R0 = 5000;
}
double R = (R0 * voltage) / (5.0 - voltage);
double temp = (T0 * B) / ((T0 * Math.Log(R / R0)) + B);
// Returns the temperature in degrees centigrade.
return(temp - 273.15);
}
public double ReadData()
{
data = reader.ReadWaveform(samplesPerChannel);
double sum = 0;
for (int i = 0; i < samplesPerChannel; i++)
{
sum += data.Samples[i].Value;
//Console.WriteLine("Sample{0}=>time={1}, value={2}", i + 1, data.Samples[i].TimeStamp, data.Samples[i].Value);
}
return(sum / samplesPerChannel);
//return reader.ReadSingleSample();
}
