private void btnTake3DC_Click(object sender, System.EventArgs e)
{
double[] dNum = new double[3];
ioDmm.WriteString("CONF:VOLT:DC 10, 0.1;:SAMP:COUN 3", true);
ioDmm.WriteString("READ?", true);
dNum = (double[])ioDmm.ReadList(IEEEASCIIType.ASCIIType_R8, ",");
this.txtReading1.Text = dNum[0].ToString();
this.txtReading2.Text = dNum[1].ToString();
this.txtReading3.Text = dNum[2].ToString();
}
public void Readings(ref ArrayList reading, ref ArrayList timestamp, ref ArrayList channelnum)
//"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
// This function triggers the instrument and takes readings.
//YJW: 函数，读取安捷伦测量值
//"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
{
string Dateval, // Returns the date value //YJW: 日期
Timeval; // Returns the time value //YJW: 时间
int i; // Used for a loop //YJW: 循环计数器
object[] rdgs = new object[3]; // Returns reading from memory //YJW: OBJ容器，
// Check for exceptions
//YJW: 放在TRY里面捕获异常
try
{
// Trigger instrument
//YJW: 开始测量
data_logger.WriteString("INITiate", true);
// Get the date at which the scan was started
//YJW: 从主机读测量开始的日期
data_logger.WriteString("SYSTem:DATE?", true);
Dateval = data_logger.ReadString();
// Remove cr and or linefeed character
//YJW: 去掉末尾标记用于显示
if (Globls.addrtype == "ASRL")
{
Dateval = Dateval.Remove((Dateval.Length - 2), 2);
}
else
{
Dateval = Dateval.Remove((Dateval.Length - 1), 1);
}
// Get the time at which the scan was started
//YJW: 从主机读测量开始的时间
data_logger.WriteString("SYSTem:TIME?", true);
Timeval = data_logger.ReadString();
// Remove cr and or lf character
//YJW：去掉末尾标记用于显示
if (Globls.addrtype == "ASRL")
{
Timeval = Timeval.Remove((Timeval.Length - 2), 2);
}
else
{
Timeval = Timeval.Remove((Timeval.Length - 1), 1);
}
// Wait until instrument is finished taken readings. The instrument is queried
// until all channels are measured.
//YJW: 等待主机测量完毕，主机内存中的数据记录数目等于设定应有的记录数目
do
{
data_logger.WriteString("DATA:POINTS?", true);
i = (Convert.ToInt16((double)data_logger.ReadNumber(IEEEASCIIType.ASCIIType_R8, true)));
}while (i != Globls.NumRdgs);
// Check for errors
//YJW: 错误处理函数
Check_Error("Readings");
// Take readings out of memory one reading at a time. The "FETCh?" can also be used.
// It reads all readings in memory, but leaves the readings in memory. The
// "DATA:REMove?" command removes and erases the readings in memory.
//YJW: 使用DATA:REMove?逐条从主机内存中读取并擦除记录,也可以使用FETCh,但是FETCh只读取不擦除
reading.Clear(); timestamp.Clear(); channelnum.Clear(); //YJW: 清空用来装测量数据的各个ARRAYLIST
for (i = 0; i < Globls.NumRdgs; i++) //YJW: 逐条地
{
data_logger.WriteString("DATA:REMove? 1", true); //READ AND REMOVE THE DATA FROM THE MENORY //YJW: 发送命令读取并且删除一条数据
rdgs = (object[])data_logger.ReadList(IEEEASCIIType.ASCIIType_BSTR, ","); //YJW: 用rdgs这个对象指针指向data_logger.Readlist这个对象
// Get reading
//YJW: 读取测量值
reading.Add(Convert.ToDouble(rdgs[0].ToString()));
//----------YJW CODE BEGIN----------
//YJW: 读取测量值的时间戳，时间戳是分散的，要拼起来
string temptimestamp = "";
for (int ind = 1; ind < rdgs.Length - 2; ind++)
{
temptimestamp += rdgs[ind].ToString();
}
timestamp.Add(temptimestamp);
//----------YJW CODE END----------
// Get channel number
//YJW: 读取测量值对应的通道号
channelnum.Add(Convert.ToInt16(rdgs[rdgs.Length - 1].ToString().Substring(0, 3)));
}
}
catch (Exception)//YJW: 异常捕获处理块
{
//MessageBox.Show(e.Message + "\nin function: Readings", "VISACom");
//End_Prog();
}
}
/* The following example uses CONFigure with the dBm math operation
* The CONFigure command gives you a little more programming flexibility
* than the MEASure? command. This allows you to 'incrementally'
* change the multimeter's configuration.
* Be sure to set the instrument address and Initialize before
* caliing this method.
*/
private void btnConfigure_Click(object sender, System.EventArgs e)
{
try
{
System.Windows.Forms.Cursor.Current = Cursors.WaitCursor;
btnConfigure.Enabled = false;
btnMeasure.Enabled = false;
//Reset the dmm
ioDmm.WriteString("*RST", true);
//Clear the dmm registers
ioDmm.WriteString("*CLS", true);
//Set 50 ohm reference for dBm
ioDmm.WriteString("CALC:DBM:REF 50", true);
/*CONFigure command sets range and resolution for AC.
* all other AC function parameters are defaulted but can be
* set before a READ?
*/
// Set dmm to 1 amp ac range
ioDmm.WriteString("Conf:Volt:AC 1, 0.001", true);
// Select the 200 Hz (fast) ac filter
ioDmm.WriteString(":Det:Band 200", true);
//dmm will accept 5 triggers
ioDmm.WriteString("Trig:Coun 5", true);
//Trigger source is IMMediate
ioDmm.WriteString("Trig:Sour IMM", true);
//Select dBm function
ioDmm.WriteString("Calc:Func DBM", true);
//Enable math and request operation complete
ioDmm.WriteString("Calc:Stat ON", true);
//Take readings; send to output buffer
ioDmm.WriteString("Read?", true);
// Get readings and parse into array of doubles
// Enter will wait until all readings are completed
//' print to Text box
double[] Readings = new double[5];
string sText = "";
txtResult.Text = "";
Readings = (double[])ioDmm.ReadList(IEEEASCIIType.ASCIIType_R8, ",");
for (int iIndex = 0; iIndex < Readings.Length; iIndex++)
{
sText = sText + Readings[iIndex].ToString() + " dBm" + "\r\n";
}
txtResult.Text = sText;
btnConfigure.Enabled = true;
btnMeasure.Enabled = true;
System.Windows.Forms.Cursor.Current = Cursors.Default;
}
catch (SystemException ex)
{
btnConfigure.Enabled = true;
btnMeasure.Enabled = true;
MessageBox.Show("Configure command failed. " + ex.Source + " " + ex.Message, "GPIBMeasConfig", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
