How to cancel a callback function when it is run in CVI?

Hi, guys.

I am a user of LabVIEW and intesrting in CVI recently.

See my attached that question please. It's so easy in LabVIEW, but it bothers me for several days.

NUM would increase 1 and 1 second per iteration delay after clicking the run button.
My question is,
Is it possible to interrupt the function of Run_callback by clicking on the Stop button when the loop is running?
If Yes, could you please help modify my example.

Thank you.

Hello-

To answer your question, indirectly, a better way to achieve what you are looking for is maybe thanks to the use of a timer.  You could place a timer on your UIR and set the interval to 1 second.  This timer calls a routine in your code at the interval that you set.  Then you just select or clear reminders for the run button and switch to stop timer.  I modified your example and attached it below.  Let us know if you have any questions!

NickB

National Instruments

Tags: NI Software

Similar Questions

  • How to start the VPN connection when windows is running

    Original title: trouble with automatically the VPN connection

    Hi, I want to have my VPN connection to start automatically when windows is running.

    Simple version:
    I tried various different methods, including; Paste the shortcut in the startup folder and adding the task in the Task Scheduler.

    I have the same problems with both methods. Just the VPN starts automatically... I have to run it manually whenever I turn on the computer or wake up sleep mode.
    Does anyone know other methods finally a solution for the other two methods?
    In the version of the depth of the problems:

    Method of Task Scheduler: I get argument is not valid, it is even after I have successfully created the task and click OK. The task will not work, and also by some strange reason, my VPN password is not get recorded on my connection more. So now, I need to manually start the connection and type in the password. (I click on save the password whenever this does not work, when the task is active...)

    Shortcut to the startup directory: Simple and easy... It simply doesn't get it. I followed the steps very carefully and I'm 100% sure that I did it the right way...

    These links have good information on how to open a VPN connection to the Windows dΘmarrage

    http://www.dariancabot.com/2010/11/15/automatically-connect-to-VPN-at-Windows-startup/

    http://www.Buchatech.com/2011/04/configure-Windows-to-automatically-connect-to-VPN/

  • How to cancel Adobe Creative cloud when you are blocked for a year after the first month and you need to pay 50% of the cost? Outregous!

    So bad that I couldn't cancel my subscription. A very big family problem is forcing me to cancel all my subscriptions, among them creative cloud. When you try to do, I learn I'm stuck unless I pay 50% of the cost of the remaining months. I am therefore be punished for having financial problems. The nice guy helped me with two months free, but the thing is 50%. You ever thing about future problems when you accept contracts like that. And they simply don't care. Adobe is so amazing, but so rigid. This is me.

    Hi Mario,.

    Please consult the General conditions of subscription as below:

    Adobe - General conditions of subscription

    The cancellation, have referred the help below document:

    Cancel your membership creative cloud

    You will need to contact customer service for cancellation requests.

    Kind regards

    Sheena

  • How to cancel ALL the functions "improved" Firefox 4 - feeling, back all the old way, without EVEN more PLUGINS.

    Several issues have already been similar to this announcement, but the questions and answers solves most of the point. Firefox 4 now is too similar to Chrome. We accepted Chrome, not because he was handsome, but because she was thin. The snazzy features like bars of contextual State compared to a straight line across the bottom and the WebRep on top are NOT an improvement. They can look pretty until you need them but they interfere with ease of use. The solutions presented, as they are, tend to add this device or this plugin to change the appearance, but this only adds to the mess. So the question in short: How do old back, blocks, but less-is-more simply efficient and where everything belongs? Thank you!

    You cannot restore the changes by removing support for features like happened with the status bar. These changes can be restored only by an extension (status-4-Evar). Another change can be undone by activating / deactivating prefs or through code in userChrome.css that does not require an extension, but require modifying the userChrome.css file and adding a specific CSS code.

    See this mozillaZine on 'Fx4.css tweaks: forum thread

    You can right click on the orange Firefox button to open the menu of the toolbar.

    • Click on the entry in the Menu bar to make the menus visible bar.
    • Click "Tabs at the top" to remove the check mark and place the tab to its original position bar just above the browser window.
  • In bill paying-how remove 'cancel the payment instruction' when there is no instruction to cancellation

    The bill payer - I sent a payment thru. My system stopped treatment just before I received the message ok transformed. I sent the request for payment. I received

    the treatment is completed the first transaction. I immediately stopped payment on the second request. The bill payer, I received the message that he had ceased payment successfully. (The Bank has confirmed that only the first query went thru, but the second does not) Now I am constantly a message to process a cancellation statement. There are no instructions to send. I tried to create a new statement whithout any success. I tried the option 'send' without success. I tried ' cancellation option) without success. "                                                                                                                                                                            . I tried the support of PC to my Bank. They can see a partial query of Quicken, but not a complete statement. So they feel it's a problem with Quicken.

    Everytime I try close Quicken, I get the message to send, close etc. so I can't closed Quicken.

    Contact Quicken Bill pay support. Nothing to do with Microsoft.

  • Clientdata bad pointer in a callback function

    Hello

    I'm trying to pass a data object to a callback function when the load a document.

    This is my code:

    AVAppRegisterNotification (AVDocDidOpenNSEL, gExtensionID, ASCallbackCreateNotification (AVDocDidOpen, (void *) myNotificationCallback), (void *) & aClientData);

    The callback function is the following:

    ACCB1 Sub ACCB2 myNotificationCallback(void *clientData)

    {

    ....

    }

    However my address pointer in the callback function clientData is not the same as the address when I put it in the AVAppRegisterNotification function.

    How is that possible?

    Consider, for example: the recall will need to know what AVDoc is just opened, which is not possible if the only parameter is clientData.

  • Help please: how to cancel the divs PA Tables

    I think I did something stupid! I was playing around in Dreamweaver and I was looking under the tabs > modify > convert > Tables to AP divs. So I clicked on "Tables divs PA" (just to see what he would do) THINKING than what I would have done it I would be able to "undo" - well no, I could not cancel. The page is titled "RequestOrder. Then I opened another page, called "RequestInspection" and it has also seen this page! I opened another site and all pages, titled 'Application [any name]' also has the same effect! All pages that have no "Request" in the title were not conducted.

    Can someone please tell me what I did wrong and how to cancel it please? When I look at the pages in the browser, everything seems normal. But I want all of this to go back to the way it was.

    I learned my lesson - do not just click on something just to see what he does... usually I don't get in a situation where I can't cancel something.

    Thank you very much!

    -J

    Example of what looks like the page in Dreamweaver:

    Help.jpg

    If you base this 911 call on the appearance of the screen in Design view only?  Look in Code view.  Do you see tables or div tags?  Try using the VIEW | Grid > show grid.  He disappears?

  • How to get out of the callback function key before it complete the LabwindowsCVI

    Hi all

    In my program I use the command button (called SCAN) to analyze the setting on the serial port. When I press SCAN button callback fuction starts to send command on the series for the scan on the serial port setting. There are 99 order send and read. It takes about 3 minutes. It works very well. Now, I want to stop scanning and exit the callback function that is called by the button SCAN. Now when I press the SCAN button that it completes all 99 recommend and control then come to the interface user. So I'm not able to stop and get out of this loop. Y at - it a why to exit this loop if the user wants to get out? otherwise it will finish the scan.

    -Vishnu

    Hello

    I'll give you 3 options:

    1. If you want to go programaticly you can use simple break when stopping 'event' occur.

    2. If you want to go with a Cancel button, you can use this post:

    http://forums.NI.com/T5/LabWindows-CVI/few-general-CVI-questions-how-the-compiler-works/m-p/1440984

    where I already asked that it is not the recommended option for the panels.

    3. the best option is to use the multi threading separate each button in thread...

  • When I start typing my ID to connect to the e-mail, the program ended my email address and for the safety of the reasons that I don't want that so how can I turn that function off auto

    When logging in to my gmail account, as soon as I start typing my ID program ends my e-mail address. For security reasons that I want to provide my email address complete and password - I don't want to auto fill or auto insert or anything automatic. How can I disable this function?

    • Click on the (empty) input field on the web page to open the drop-down list
    • Select an entry in the drop-down list
    • Press the DELETE key (on a Mac: shift + delete) to remove it.
    • Tools > Options > Security: passwords: "saved passwords" > "show passwords".
  • How to cancel a subscription to Apple's music when beyond the 3 months free?

    Hi how to cancel my subscription to Apple's music when the 3 month free?

    Click here, follow the instructions and wait until it expires.

    (138921)

  • How to implement a callback to the help function call library function node in LabView?

    I try to call a fuction from a SDK.dll library by using the node call library feature. The SDK has been provided to

    me and I don't have the source code, just the .dll and .h files.

    The SdkSetPropertyEventHandler function has a function of recall as one of its parameters. How to apply the

    callback using the NSI node? I'm a good programmer LabView but this is my first time using the library to call

    Function node. I read all the info I can find on the web site of NOR and the discussion Forum, but can not understand

    This one out. I'm using LabView 8.6.

    The deacribes SDK.h function as:

    Function: SdkSetPropertyEventHandler

    (SdkSetPropertyEventHandler) SdkError SDKAPI
    SdkCameraRef inCameraRef,
    SdkPropertyEvent inEvnet,
    SdkPropertyEventHandler inPropertyEventHandler,
    SdkVoid * context);

    //
    Description:
    Registers a callback function to receive the status
    change the notification events for the States of property on a camera.
    //
    Parameters:
    In: inCameraRef - designate the object camera.
    inEvent - designated one or all the events will be completed.
    inPropertyEventHandler - designate the pointer to the callback
    function to receive the camera property-related events.
    inContext - designated application information must be passed
    way to the callback function. All the data necessary to
    your application can be passed.
    Output: no
    //
    Returns: A sdk errors.
    -----------------------------------------------------------------------------*/

    A separate header called SDKTypes.h file contains the following data:

    typedef SdkUInt32 SdkPropertyEvent;
    typedef SdkUInt32 SdkPropertyID;
    typedef void SdkVoid;

    typedef struct __SdkObject * SdkBaseRef;
    typedef SdkBaseRef SdkCameraRef;

    /*-----------------------------------------------------------------------------
    SdkPropertyEventHandler
    -----------------------------------------------------------------------------*/
    typedef SdkError (SDKCALLBACK * SdkPropertyEventHandler))
    SdkPropertyEvent inEvent,
    SdkPropertyID inPropertyID,
    SdkUInt32 inParam,
    SdkVoid * context);

    Thanks for your help.
    Alejandro

    Andrew_E wrote:

    Hi Rolfk,

    You are absolutely right. This article describes what you were talking about? I'm just trying to get as much information as possible on this thread if the solution is easier to find for the future. Thank you.

    Yes, but I find the idea of using .net to call a LabVIEW VI as callback function C a bit as using a roll of Steam ironing your pants. Why do it? Well the steamroller has extra security guards that make it less likely that you'll break your pants in the process, but it's not elegant IMHO.

    Write a C DLL that translates between a C callback and a user event LabVIEW using the PostLVUserEvent() of the interface of the kernel to run LabVIEW function seems so eleganter for me. Yes, it's a bit of programming in C, but good!

    Rolf Kalbermatter

  • How to run progamatically of callback functions

    Title says it all.

    I want to execute a callback to a command by programming button. How is that possible?

    Hello

    It's pretty simple: you call the callback function...

    For example, if it is defined as an int CVICALLBACK QuitCallback (int command face, int, int event, void * callbackData, int eventData1, int eventData2)

    You can call the function as QuitCallback (Panel, control, event, callbackData, eventData1, eventData2), where you will need to use the appropriate panel and control the ID. For the event, you can provide the type of event you want to simulate, for example EVENT_COMMIT. If you do not need a callbackData, eventData1, eventData2, you can specify zero. In summary:

    QuitCallback (panel_ID, control_ID, EVENT_COMMIT, 0, 0, 0);

    Wolfgang

  • How to cancel my membership creative cloud when the option "manage the plan" does not appear as an option on my screen?

    How to cancel my membership creative cloud when the option "manage the plan" does not appear as an option on my screen?

    Cancel your subscription or membership. Creative cloud

  • How to activate the search function.  I get no match found when I search for words on the scanned PDF document

    How to activate the search function.  I get no match found when I search for words on the scanned PDF document

    A scanned document is just an image; even if it contains text, it is not searchable.

    Put text in a scanned image available, you will need to perform the recognition of text (OCR), which can be made with Acrobat, but not the free player.

  • How to change the callback of a GUI button function?

    I would like to change the callback function associated with a GUI button dynamically in the programming track.

    Here is the piece of code that I tried, but it doesn't seem to work:

    const char * pstrLabelSaveJpeg = "SaveJpegCb";

    SetCtrlAttribute (pahel_id, ctrl_id, ATTR_LABEL_TEXT, pstrLabelSaveJpeg);

    int CVICALLBACK SaveJpegCb(int panel, int control, int event, void *callbackData, int eventData1, int eventData2);

    The attribute that you used is the 'label' of the button.

    It is only an appearance attribute. You can write your own name on it, but this does not alter the callback function.

    You must change the ATTR_CALLBACK_FUNCTION_POINTER attribute, and you shall not take the name of the function as a string.

    If your function call will look like this:

    SetCtrlAttribute (pahel_id, ctrl_id, ATTR_CALLBACK_FUNCTION_POINTER, SaveJpegCb);

    Of course, you must declare the function SaveJpegCb somewhere above this line.

    I think you have already done this.

Maybe you are looking for

  • Apple Watch iPhone app still shows "Views" instead of "Dock".

    I have updated to iOS 10 and watch OS 3. But the Apple Watch app on iPhone does not display "Dock", rather "Looks" are always displayed. Thoughts?

  • Camileo H20 - strange noise throughout the video

    Hello. I today received delivery of my first camcorder, which as the title suggests, is a Toshiba Camileo H20. Overall, I am impressed with this little camera, but there is a problem that concerns me. After reviewing a video of test, I created to see

  • My hp computer won't light?

    I turned on my computer after you open because a cable went inside and now its sequel and yes the green light is solid. but the power light is not on and nothing shows up on the screen, sound also produce a loud audio fan.Help, please!

  • Hello my iphone has an icon of the air and I can't get him off

    I have an icon of the air which is blockiing my phone and I can't use it

  • write lag to the worksheet

    Hello! I can't write the difference in time between my set of six switches in a worksheet. I would like to only six values appear on the worksheet, the differences between the beginning and end of each series of switches. I tried what I usually do wh