void update_gui(power_data data)
{
double current_ma = data.current * 1000;
controlSetPropertyValue(labelVoltage, string.Format("{0:F4} V", data.voltage));
controlSetPropertyValue(labelCurrent, string.Format("{0:F3} mA", current_ma));
controlSetPropertyValue(labelSamples, string.Format("{0}", _read_count++));
update_chart(data);
double power_mw = data.voltage * current_ma;
if (power_mw > _power_max_val)
{
_power_max_val = power_mw;
}
if (power_mw < _power_min_val)
{
_power_min_val = power_mw;
}
_power_average = (_power_average * (_read_count - 1) + power_mw) / _read_count;
controlSetPropertyValue(labelPower, string.Format("{0:F6} mW", power_mw));
controlSetPropertyValue(labelMax, string.Format("{0:F6} mW", _power_max_val));
controlSetPropertyValue(labelMin, string.Format("{0:F6} mW", _power_min_val));
controlSetPropertyValue(labelAve, string.Format("{0:F6} mW", _power_average));
}
void update_chart(power_data data)
{
if (chart1.InvokeRequired)
{
updateGUICallback d = new updateGUICallback(update_chart);
this.Invoke(d, new object[] { data });
}
else
{
try
{
chart1.Series["Power"].Points.AddXY(data.time_stamp.ToLongTimeString(), data.current * data.voltage);
}
catch (Exception ex)
{
string msg = ex.Message;
}
}
}
/// <summary>
/// Takes meter measurements until cancel
/// </summary>
void meter_run()
{
_meter.ClearData();
while (true)
{
if (_cancel.Token.IsCancellationRequested)
{
return;
}
power_data data = new power_data();
data.time_stamp = DateTime.Now;
bool success = false;
_meter.ClearData();
_meter.WriteLine("*TRG;MEAS:CURR:DC? 50E-03");
for (int i = 0; i < 3; i++)
{
string meter_output_current = _meter.WaitForData(50);
try
{
data.current = Convert.ToDouble(meter_output_current);
success = true;
break;
}
catch (Exception ex)
{
success = false;
updateOutputStatus("Current: " + ex.Message + " : " + meter_output_current.Replace("\r\n", ","));
}
}
if (success)
{
success = false;
_meter.ClearData();
_meter.WriteLine("*TRG;MEAS2:VOLT:DC? 5");
for (int i = 0; i < 3; i++)
{
string meter_output_voltage = _meter.WaitForData(50);
try
{
data.voltage = Convert.ToDouble(meter_output_voltage);
success = true;
break;
}
catch (Exception ex)
{
success = false;
updateOutputStatus("Voltage: " + ex.Message + " : " + meter_output_voltage.Replace("\r\n", ","));
}
}
}
if (success)
{
data_list.Add(data);
update_gui(data);
}
}
}