/// <summary>
/// Values of the instrument parameters are set using <c>send</c>.
/// The command to set is predefined by <c>instrInfo.sendCms</c>
/// according to the instrument instantiated.
/// </summary>
/// <param name="val">Value to set the instrument parameter.</param>
/// <returns>true</returns> is returned if everything is ok.
public void Send(float val)
{
//if (this.mainform1 != null)
// this.mainform1.setInstrumentValue(FormattedIO488 dmm, InstrumentInfo cmd, float val, bool VF);
string caption = "Alert - Send Command";
//string menssagem = " ";
MessageBoxButtons buttons = MessageBoxButtons.OK;
try
{
dmm.WriteString(instrInfo.sendCmd + val + "\n", true);
// string CMDvalue = instrInfo.sendCmd;
//MessageBox.Show( CMDvalue, caption, buttons);
}
catch (Exception e)
{
Ivi.Visa.Interop.GPIBAddressState GPIBState = new Ivi.Visa.Interop.GPIBAddressState();
// System.Console.Out.WriteLine("An error occurred: " + e.Message);
MessageBox.Show("Error :" + e.Message + " GPIB State :" + GPIBState, caption, buttons);
}
}
/// <summary>
/// A measurement is <c>read</c> where <c>instrInfo.readCmd</c>
/// is a string containing the command description to be
/// executed in the instrument. The bus is read by the formatted
/// string returned with <c>dmm.ReadString</c> and converted to
/// <c>float</c>.
/// </summary>
/// <returns>val</returns> is the value measured in the instrument.
public float Read()
{
string caption = "Alert - Read Command";
//string menssagem = " ";
MessageBoxButtons buttons = MessageBoxButtons.OK;
//String.Format("0.0######e+###", float.MaxValue);
float val = -float.MaxValue;
try
{
Contract.Ensures(val != -float.MaxValue);
dmm.WriteString(instrInfo.readCmd, true);
if (dmm.IO.ResourceName == "GPIB0::17::INSTR")
{
/*string sample returned by pAMETER' NI+1.228E-04,A+0000'.*/
string valor = dmm.ReadString();
string fc = valor.Substring(1,2); /* XXX+X. existem 3 caracteres antes do primeiro sinal*/
string sig = valor.Substring(3,1);
string ic = valor.Substring(4,5);
int pos = valor.IndexOf("E");
string sigexp = "";
if (pos == -1)
sigexp = valor.Substring(10,1);
else
sigexp = valor.Substring(pos+1,1);
string exp = valor.Substring(11,2);
string sigva = valor.Substring(15,1);
string va = valor.Substring(16,4);
val = float.Parse(sig+ic);
}
else if (dmm.IO.ResourceName == "GPIB0::9::INSTR")
{
/*string sample returned by Data Acquisition -9.90000000E+37*/
string valor = dmm.ReadString();
float vl1;
string sigvl = valor.Substring(0, 1);
string vl = valor.Substring(1, 10);
//val = float.Parse(sigvl + vl);
string vlfull = valor.Substring(0, 15);
if (float.TryParse(vlfull, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out vl1))
val = vl1;
else
val = float.Parse(vlfull);
}
//val = 20;
//MessageBox.Show(val.ToString(), caption, buttons);
return val;
}
catch (Exception e)
{
Ivi.Visa.Interop.GPIBAddressState GPIBState = new Ivi.Visa.Interop.GPIBAddressState();
System.Console.Out.WriteLine("An error occurred: " + e.Message);
MessageBox.Show("Error :" + e.Message + " GPIB State :" + GPIBState, caption, buttons);
return val;
}
finally
{
}
}
/// <summary>
/// A measurement is <c>read</c> where <c>instrInfo.readCmd</c>
/// is a string containing the command description to be
/// executed in the instrument. The bus is read by the formatted
/// string returned with <c>dmm.ReadString</c> and converted to
/// <c>float</c>.
/// </summary>
/// <returns>val</returns> is the value measured in the instrument.
public float Read()
{
string caption = "Alert - Read Command";
//string menssagem = " ";
MessageBoxButtons buttons = MessageBoxButtons.OK;
float val = -float.MaxValue;
try
{
Contract.Ensures(val != -float.MaxValue);
dmm.WriteString(instrInfo.readCmd, true);
val = float.Parse(dmm.ReadString());
//val = 20;
MessageBox.Show(dmm.ReadString(), caption, buttons);
return val;
}
catch (Exception e)
{
Ivi.Visa.Interop.GPIBAddressState GPIBState = new Ivi.Visa.Interop.GPIBAddressState();
System.Console.Out.WriteLine("An error occurred: " + e.Message);
MessageBox.Show("Error :" + e.Message + " GPIB State :" + GPIBState, caption, buttons);
return val;
}
finally
{
}
}
/// <summary>
/// <c>openPort</c> connects to the instrument addressed to
/// <c>busAddress</c> and set the <c>STATe</c> of the
/// instrument to <c>ON</c>, from this point the instruments are ready
/// to start communicating.
/// </summary>
/// <returns>true</returns> is returned if the connection is succeded,
/// <c>isConnected</c> is set to <c>true</c> to be used as flag during the
/// experiment.
public virtual void OpenPort()
{
object[] idnItems;
string caption = "Alert - Open Port";
string menssagem = "";
MessageBoxButtons buttons = MessageBoxButtons.OK;
try
{
dmm.IO = (IMessage)mgr.Open(instrInfo.busAddress.ToUpper(),
AccessMode.NO_LOCK, 2000, this.IO_Options);
dmm.IO.SendEndEnabled = true;
dmm.IO.TerminationCharacter = 0x0A;
dmm.IO.TerminationCharacterEnabled = true;
dmm.WriteString("\n", true); // termination caracter
}
catch (Exception e)
{
Ivi.Visa.Interop.GPIBAddressState GPIBState = new Ivi.Visa.Interop.GPIBAddressState();
Ivi.Visa.Interop.VisaStatusCode VISAStatus = new Ivi.Visa.Interop.VisaStatusCode();
MessageBox.Show("Error :" + e.Message + " VISA Status :" + VISAStatus + " - " + instrInfo.busAddress.ToUpper(), caption, buttons);
// System.Console.Out.WriteLine("An error occurred: " + e.Message + GPIBState);
}
/* finally
{
if (dmm.IO != null)
this.ClosePort();
}*/
}
/// <summary>
/// <c>openPort</c> connects to the instrument addressed to
/// <c>busAddress</c> and set the <c>STATe</c> of the
/// instrument to <c>ON</c>, from this point the instruments are ready
/// to start communicating.
/// </summary>
/// <returns>true</returns> is returned if the connection is succeded,
/// <c>isConnected</c> is set to <c>true</c> to be used as flag during the
/// experiment.
public virtual bool OpenPort()
{
string caption = "Alert - Open Port";
MessageBoxButtons buttons = MessageBoxButtons.OK;
try
{
dmm.IO = (IMessage)mgr.Open(instrInfo.busAddress.ToUpper(),
AccessMode.NO_LOCK, 2000, this.IO_Options);
DisposeResources TestObj = new DisposeResources(dmm);
// Use the resource.
TestObj.DoSomethingWithResource();
// Dispose the resource.
TestObj.Dispose();
}
catch (Exception e)
{
Ivi.Visa.Interop.GPIBAddressState GPIBState = new Ivi.Visa.Interop.GPIBAddressState();
Ivi.Visa.Interop.VisaStatusCode VISAStatus = new Ivi.Visa.Interop.VisaStatusCode();
MessageBox.Show("Error :" + e.Message + " VISA Status :" + VISAStatus + " - " + instrInfo.busAddress.ToUpper(), caption, buttons);
// System.Console.Out.WriteLine("An error occurred: " + e.Message + GPIBState);
return false;
}
finally
{
if (dmm.IO != null)
this.ClosePort();
}
return true;
}
