public static void ThrowErrorMessage(string msg, int errorCode)
{
StringBuilder errorString = new StringBuilder(50);
LabJack.GetErrorString(errorCode, errorString);
throw new Exception(msg + ":\r\n\r\n" + errorString);
}
//---------------------------------------------------------------------
// AIStream
//
public void AIStream()
{
int error;
int ljID = -1;
int demo = 1, numChannels = 4, disableCal = 0;
int[] channels = { 0, 1, 2, 3 };
int[] gains = { 0, 0, 0, 0 };
float sr = 250.0F;
int numScans = 250, timeout = 10;
float[,] voltages = new float[4096, 4];
int[] stateIOout = new int[4096];
int ljb = -1;
int ov = -1;
int numIts = 5;
int reserved = 0;
Console.WriteLine("AIStream");
error = LabJack.AIStreamStart(ref ljID, demo, 0, 0, 1, numChannels, channels,
gains, ref sr, disableCal, 0, 0);
if (error != 0)
{
richTextBox3.AppendText("AIStreamStart Error: " + error + "\r\n");
}
int i = 0;
while ((error == 0) && (i < numIts))
{
for (int j = 0; j < 400; j++)
{
stateIOout[j] = 0;
voltages[j, 3] = 0;
//for (int k = 0; k < 4; k++)
//{
//}
double time = (double)j / numSample;
chart3.Series["Second Harmonic"].Points.AddXY(time, voltages[0, 2]);
}
error = LabJack.AIStreamRead(ljID, numScans, timeout, voltages, stateIOout, ref reserved, ref ljb, ref ov);
if (error != 0)
{
StringBuilder sb = new StringBuilder();
LabJack.GetErrorString(error, sb);
richTextBox3.AppendText("AIStreamRead Error: " + sb + "\r\n");
}
//richTextBox3.AppendText("1st Scan: V1="+ voltages[0, 0]+", V2="+ voltages[0, 1]+", V3="+ voltages[0, 2]+", V4="+ voltages[0, 3]+"\r\n");
richTextBox3.AppendText("1st Scan: V3=" + voltages[0, 2] + "\r\n");
richTextBox3.AppendText("LabJack Scan Backlog = " + ljb + "\r\n");
i++;
chart3.ChartAreas["ChartArea1"].AxisX.Minimum = 0;
chart3.ChartAreas["ChartArea1"].AxisX.RoundAxisValues();
}
LabJack.AIStreamClear(ljID);
}