/**
* Returns true if the new value requested is different from the previous value
* Return false if not
* */
private bool newValue(int chn, double value, PSUIOValues field)
{
bool retval = false;
switch (field)
{
case PSUIOValues.SetCurrent:
if (previousCurrent[chn] != value)
{
retval = true;
previousCurrent[chn] = value;
}
break;
case PSUIOValues.SetVoltage:
if (previousVoltage[chn] != value)
{
retval = true;
previousVoltage[chn] = value;
}
break;
default:
break;
}
return(retval);
}
/**
* Interpret the command and return the proper string
* represenation for the PSU
* */
private string getCmd(PSUIOValues val)
{
string cmd = "";
switch (val)
{
case PSUIOValues.CurrentSet:
case PSUIOValues.SetCurrent:
cmd = "ISET";
break;
case PSUIOValues.VoltageSet:
case PSUIOValues.SetVoltage:
cmd = "VSET";
break;
case PSUIOValues.CurrentOut:
cmd = "IOUT";
break;
case PSUIOValues.VoltageOut:
cmd = "VOUT";
break;
default:
break;
}
return(cmd);
}
/**
* Set a value (e.g. current)
* */
private void setValue(int chn, double value, PSUIOValues field)
{
if (validateChannel(chn)) //&& newValue(chn,value,field))
{
string command = getCmd(field, chn, value);
sendCommand(command);
}
}
/**
* Set a value (e.g. current)
* */
private void setValue(int chn, double value, PSUIOValues field)
{
if (validateChannel(chn)) //&& newValue(chn,value,field))
{
string cmd = getCmd(field);
string command = cmd + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":" + value.ToString(CultureInfo.InvariantCulture);
sendCommand(command);
}
}
/**
* Interpret the command and return the proper string
* PSUIOValues indicates the type of action requested
* int chn the channel number
* double value the optional output value
* represenation for the PSU
* */
private string getCmd(PSUIOValues val, int chn, double value)
{
string cmd = "";
switch (val)
{
case PSUIOValues.CurrentSet:
cmd = "I1?";
break;
case PSUIOValues.SetCurrent:
cmd = "I1 " + value.ToString(CultureInfo.InvariantCulture);
break;
case PSUIOValues.VoltageSet:
cmd = "V1?";
break;
case PSUIOValues.SetVoltage:
cmd = "V1 " + value.ToString(CultureInfo.InvariantCulture);
break;
case PSUIOValues.CurrentOut:
cmd = "I1O?";
break;
case PSUIOValues.VoltageOut:
cmd = "V1O?";
break;
default:
break;
}
return(cmd);
}
/**
* Get the specified value from the PSU
* */
private double getValue(int chn, PSUIOValues val)
{
double retval = 0;
if (validateChannel(chn))
{
string cmd = getCmd(val);
//remember to add one since the PSU assumes channel 1 and 2, i.e. is index-1 based
string command = cmd + (chn + 1).ToString() + "?";
//flag the datareceived to be false so the eventhandler will start picking up data
dataReceived = false;
dataStringReceived = "";
//send the command to the PSU
sendCommand(command);
//set values for the wait loop
int ti_max = 200;
int ti = 0;
while (!dataReceived && ti < ti_max)
{
Thread.Sleep(1);
ti++;
}
//convert the received string to a useful number
string s = dataStringReceived;;
try
{
string subStr = dataStringReceived.Substring(0, dataStringReceived.Length - 1);
retval = Double.Parse(subStr, CultureInfo.InvariantCulture);
}
catch (Exception ex)
{
}
}
return(retval);
}
/**
* Get the specified value from the PSU
* */
private double getValue(int chn, PSUIOValues val)
{
double retval = 0;
if (validateChannel(chn) && mbSession != null)
{
string command = getCmd(val, chn, 0);
mbSession.RawIO.Write(command + "\n");
// string retString = mbSession.RawIO.ReadString();
string retString = "";
try
{
retval = Convert.ToDouble(retString, CultureInfo.InvariantCulture);
}
catch (FormatException ex)
{
}
catch (OverflowException ex)
{
}
}
return(retval);
}
/**
* Get the specified value from the PSU
* */
private double getValue(int chn, PSUIOValues val)
{
double retval = 0;
if (validateChannel(chn) && mbSession != null)
{
string command = getCmd(val, chn, 0);
mbSession.RawIO.Write(command + "\n");
Thread.Sleep(100);
string retString = mbSession.RawIO.ReadString();
try
{
//The format of the output is "V 1 VAL" (V is for voltage; if a current is returned then V->I)
retval = Convert.ToDouble(retString.Substring(3), CultureInfo.InvariantCulture);
}
catch (FormatException ex)
{
}
catch (OverflowException ex)
{
}
}
return(retval);
}
/**
* Interpret the command and return the proper string
* PSUIOValues indicates the type of action requested
* int chn the channel number
* double value the optional output value
* represenation for the PSU
* */
private string getCmd(PSUIOValues val, int chn, double value)
{
string cmd = "";
switch (val)
{
case PSUIOValues.CurrentSet:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":CURR ?";
break;
case PSUIOValues.SetCurrent:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":CURR " + value.ToString(CultureInfo.InvariantCulture);
break;
case PSUIOValues.VoltageSet:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":VOLT ?";
break;
case PSUIOValues.SetVoltage:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":VOLT " + value.ToString(CultureInfo.InvariantCulture);
break;
case PSUIOValues.CurrentOut:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":MEAS:CURR ?";
break;
case PSUIOValues.VoltageOut:
cmd = ":CHAN" + (chn + 1).ToString(CultureInfo.InvariantCulture) + ":MEAS:VOLT ?";
break;
default:
break;
}
return(cmd);
}
