With Traditional NI-DAQ Compatibility VI's the acquisition locks when I press the increment or decrement button of a numeric control.
Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
I built machines that can have one or the other board (depending if it is low-end or normal). Does somebody knows the solution for this problem?
Thanks in advance.
Paulo Carmo
Attachments:
experiencia.vi 49 KB
Hello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/9d67f671bcc6850586256e630059308b?...
Please read this information and then tell me something please.
Best regards!
Similar Messages
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The acquisition locks when I press the increment or decrement button of a numeric control
Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
I built machines that can have one or the other board (depending if it is low-end or normal). Does somebody knows the solution for this problem?
Thanks in advance.
Paulo Carmo
Attachments:
experiencia.vi 49 KBHello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/9d67f671bcc6850586256e630059308b?...
Please read this information and then tell me something please.
Best regards! -
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My code is not complete as I am stubbing my code. Can someone tell me why i get the following exception
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at Phonebook.createNew(Phonebook.java:244)
at Phonebook.actionPerformed(Phonebook.java:222)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
95)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
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at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
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at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:2
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at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)in the following code whenever I press the cancel button in the part of code that tests fro when a user clicks the create button.
Filename: ContactsListInterface.java
Date: 16 March 2008
Programmer: Yucca Nel
Purpose: Provides a GUI for entering names and contact numbers into a telephone directory.
Also allows options for searching for a specific name and deleting of data from the record
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import java.io.*;
import java.util.*;
import java.text.*;
public class Phonebook extends JFrame implements ActionListener
{ //start of class
// construct fields, buttons, labels,text boxes, ArrayLists etc
JTextPane displayPane = new JTextPane();
JLabel listOfContacts = new JLabel("List Of Contacts"); // creates a label for the scrollpane
JButton createButton = new JButton("Create");
JButton searchButton = new JButton("Search");
JButton modifyButton = new JButton("Modify");
JButton deleteButton = new JButton("Delete");
ArrayList fNameList = new ArrayList();
ArrayList sNameList = new ArrayList();
ArrayList hList = new ArrayList();
ArrayList wList = new ArrayList();
ArrayList cList = new ArrayList();
public String name, surname, home, work, cell;
// create an instance of the ContactsListInterface
public Phonebook()
{ // start of cli()
super("Phonebook Interface");
} // end of cli()
public JMenuBar createMenuBar()
{ // start of the createMenuBar()
// construct and populate a menu bar
JMenuBar mnuBar = new JMenuBar(); // creates a menu bar
setJMenuBar(mnuBar);
JMenu mnuFile = new JMenu("File",true); // creates a file menu in the menu bar which is visible
mnuFile.setMnemonic(KeyEvent.VK_F);
mnuFile.setDisplayedMnemonicIndex(0);
mnuFile.setToolTipText("File Options");
mnuBar.add(mnuFile);
JMenuItem mnuFileExit = new JMenuItem("Save And Exit"); // creates an exit option in the file menu
mnuFileExit.setMnemonic(KeyEvent.VK_X);
mnuFileExit.setDisplayedMnemonicIndex(1);
mnuFileExit.setToolTipText("Close Application");
mnuFile.add(mnuFileExit);
mnuFileExit.setActionCommand("Exit");
mnuFileExit.addActionListener(this);
JMenu mnuEdit = new JMenu("Edit",true); // creates a menu for editing options
mnuEdit.setMnemonic(KeyEvent.VK_E);
mnuEdit.setDisplayedMnemonicIndex(0);
mnuEdit.setToolTipText("Edit Options");
mnuBar.add(mnuEdit);
JMenu mnuEditSort = new JMenu("Sort",true); // creates an option for sorting entries
mnuEditSort.setMnemonic(KeyEvent.VK_S);
mnuEditSort.setDisplayedMnemonicIndex(0);
mnuEdit.add(mnuEditSort);
JMenuItem mnuEditSortByName = new JMenuItem("Sort By Name"); // to sort entries by name
mnuEditSortByName.setMnemonic(KeyEvent.VK_N);
mnuEditSortByName.setDisplayedMnemonicIndex(8);
mnuEditSortByName.setToolTipText("Sort entries by first name");
mnuEditSortByName.setActionCommand("Name");
mnuEditSortByName.addActionListener(this);
mnuEditSort.add(mnuEditSortByName);
JMenuItem mnuEditSortBySurname = new JMenuItem("Sort By Surname"); // to sort entries by surname
mnuEditSortBySurname.setMnemonic(KeyEvent.VK_R);
mnuEditSortBySurname.setDisplayedMnemonicIndex(10);
mnuEditSortBySurname.setToolTipText("Sort entries by surname");
mnuEditSortBySurname.setActionCommand("Surname");
mnuEditSortBySurname.addActionListener(this);
mnuEditSort.add(mnuEditSortBySurname);
JMenu mnuHelp = new JMenu("Help",true); // creates a menu for help options
mnuHelp.setMnemonic(KeyEvent.VK_H);
mnuHelp.setDisplayedMnemonicIndex(0);
mnuHelp.setToolTipText("Help options");
mnuBar.add(mnuHelp);
JMenuItem mnuHelpHelp = new JMenuItem("Help"); // creates a help option for help topic
mnuHelpHelp.setMnemonic(KeyEvent.VK_P);
mnuHelpHelp.setDisplayedMnemonicIndex(3);
mnuHelpHelp.setToolTipText("Help Topic");
mnuHelpHelp.setActionCommand("Help");
mnuHelpHelp.addActionListener(this);
mnuHelp.add(mnuHelpHelp);
JMenuItem mnuHelpAbout = new JMenuItem("About"); // creates a about option for info about api
mnuHelpAbout.setMnemonic(KeyEvent.VK_T);
mnuHelpAbout.setDisplayedMnemonicIndex(4);
mnuHelpAbout.setToolTipText("About this program");
mnuHelpAbout.setActionCommand("About");
mnuHelpAbout.addActionListener(this);
mnuHelp.add(mnuHelpAbout);
return mnuBar;
} // end of the createMenuBar()
// create the content pane
public Container createContentPane()
{ // start of createContentPane()
//construct and populate panels and content pane
JPanel labelPanel = new JPanel(); // panel is only used to put the label for the textpane in
labelPanel.setLayout(new FlowLayout());
labelPanel.add(listOfContacts);
JPanel displayPanel = new JPanel();// panel is used to display all the contacts and thier numbers
setTabsAndStyles(displayPane);
displayPane = addTextToTextPane();
displayPane.setEditable(false);
JScrollPane scrollPane = new JScrollPane(displayPane);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); // pane is scrollable vertically
scrollPane.setWheelScrollingEnabled(true);// pane is scrollable by use of the mouse wheel
scrollPane.setPreferredSize(new Dimension(400,320));
displayPanel.add(scrollPane);
JPanel workPanel = new JPanel();// panel is used to enter, edit and delete data
workPanel.setLayout(new FlowLayout());
workPanel.add(createButton);
createButton.setToolTipText("Create a new entry");
createButton.addActionListener(this);
workPanel.add(searchButton);
searchButton.setToolTipText("Search for an entry by name number or surname");
searchButton.addActionListener(this);
workPanel.add(modifyButton);
modifyButton.setToolTipText("Modify an existing entry");
modifyButton.addActionListener(this);
workPanel.add(deleteButton);
deleteButton.setToolTipText("Delete an existing entry");
deleteButton.addActionListener(this);
labelPanel.setBackground(Color.red);
displayPanel.setBackground(Color.red);
workPanel.setBackground(Color.red);
// create container and set attributes
Container c = getContentPane();
c.setLayout(new BorderLayout(30,30));
c.add(labelPanel,BorderLayout.NORTH);
c.add(displayPanel,BorderLayout.CENTER);
c.add(workPanel,BorderLayout.SOUTH);
c.setBackground(Color.red);
// add a listener for the window closing and save
addWindowListener(
new WindowAdapter()
public void windowClosing(WindowEvent e)
int answer = JOptionPane.showConfirmDialog(null,"Are you sure you would like to save all changes and exit?","File submission",JOptionPane.YES_NO_OPTION);
if(answer == JOptionPane.YES_OPTION)
System.exit(0);
return c;
} // end of createContentPane()
protected void setTabsAndStyles(JTextPane displayPane)
{ // Start of setTabsAndStyles()
// set Font style
Style fontStyle = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE);
Style regular = displayPane.addStyle("regular", fontStyle);
StyleConstants.setFontFamily(fontStyle, "SansSerif");
Style s = displayPane.addStyle("bold", regular);
StyleConstants.setBold(s,true);
} // End of setTabsAndStyles()
public JTextPane addTextToTextPane()
{ // start of addTextToTextPane()
Document doc = displayPane.getDocument();
try
{ // start of tryblock
// clear previous text
doc.remove(0,doc.getLength());
// insert titles of columns
doc.insertString(0,"NAME\tSURNAME\tHOME NO\tWORK NO\tCELL NO\n",displayPane.getStyle("bold"));
} // end of try block
catch(BadLocationException ble)
{ // start of ble exception handler
System.err.println("Could not insert text.");
} // end of ble exception handler
return displayPane;
} // end of addTextToTextPane()
// code to process user clicks
public void actionPerformed(ActionEvent e)
{ // start of actionPerformed()
String arg = e.getActionCommand();
// user clicks create button
if(arg.equals("Create"))
createNew();
if(arg.equals("Search"))
if(arg.equals("Modify"))
if(arg.equals("Delete"))
if(arg.equals("Exit"))
} // end of actionPerformed()
// method to create a new contact
public void createNew()
{ // start of create new contact()
name = JOptionPane.showInputDialog(null,"Please enter the new contacts first name or press cancel to exit.");
if(name == null) finish(); // if user clicks cancel
if(name.length() <=0)
JOptionPane.showMessageDialog(null,"You did not enter a valid name.\nPlease make sure you enter data correctly.","Error",JOptionPane.ERROR_MESSAGE);
createNew(); // To return to the create method
surname = JOptionPane.showInputDialog(null,"Please enter the new contacts surname or press cancel to exit.");
if(surname == null) finish(); // if user clicks cancel
if(surname.equals(""))
int answer = JOptionPane.showConfirmDialog(null,"You did not enter a surname.\nAre you sure you wish to leave the surname empty?","No data entered",JOptionPane.YES_NO_OPTION); // Asks if data was valid
if(answer == JOptionPane.NO_OPTION)
surname = JOptionPane.showInputDialog(null,"Please enter the new contacts surname.");
home = JOptionPane.showInputDialog(null,"Please enter the new contacts home number or press cancel to exit.");
if(home == null) finish(); // if user clicks cancel
work = JOptionPane.showInputDialog(null,"Please enter the new contacts work number or press cancel to exit.");
if(work == null) finish(); // if user clicks cancel
cell = JOptionPane.showInputDialog(null,"Please enter the new contacts cell number or press cancel to exit.");
if(cell == null) finish(); // if user clicks cancel
} // end of create new contact()
// method to close applicatin
public void finish()
// method to search a contact
public static void main(String[] args)
{ // start of main()
// Set look and feel of interface
try
{ // start of try block
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} // end of try block
catch(Exception e)
{ // start of catch block
JOptionPane.showMessageDialog(null,"There was an error in setting the look and feel of this application","Error",JOptionPane.INFORMATION_MESSAGE);
} // end of catch block
Phonebook p = new Phonebook();
p.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
p.setJMenuBar(p.createMenuBar());
p.setContentPane(p.createContentPane());
p.setSize(520,500);
p.setVisible(true);
p.setResizable(false);
} // end of main()
} //end of classYucca wrote:
Line 244 is where I test for if the user actuallu entered a String at all. Is there an alternative way of writing that code?
if(name.length() <=0)
JOptionPane.showMessageDialog(null,"You did not enter a valid name.\nPlease make sure you enter data correctly.","Error",JOptionPane.ERROR_MESSAGE);
createNew(); // To return to the create method
Change:
if(name == null) finish(); To
if(name == null) {
finish();
return;
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