table dynamic allocation labwindows CVI

Similar Questions

• difference of initial value of string between the steps in the process and an external instance of LabWindows/CVI

  Hello

  I'm curious to know what I see using TestStand, LabWindows/2013 2013 with regard to initial in TestStand string values when you perform the steps in the process or an external instance of LabWindows/CVI.

  I have a step (CVI) string value that is used to check an array of characters stored in an EEPROM to test.  I pass on the Step.Result.String in the CVI by reference.  I then read the table charater of the EEPROM in the chain (Step.Result.String).  The string is then compared against the limit as specified in the test step breast.

  When I run this test step to perform the steps in the process selected in the popup Configuration of the adapter of LabWindows/CVI, it seems that the memory allocated for the string is filled with null characters.  Which is what I expected.

  When I run this test step to execute the steps in an external instance of LabWindows/CVI iselected of the Configuration of the adapter of LabWindows/CVI popup, it seems that the memory allocated for the string is filled with something else.  That is not what I expected.  For example what I see in the memory, it's the first characher is one byte NULL but the remaining bytes are some other values, as shown below:

  F0 00 AD BA 0D F0 AD BA 0D F0 AD BA 0D AD BA 0D AD BA 0D BA 0D AD F0 F0 F0
  F0 AD BA 0D F0 AD BA 0D F0 AD BA 0D F0 AD 0D AD BA 0D AD BA 0D F0 F0 F0 BA...

  In my code I make sure to write a null character in the following location table charater I just write in the chain so I have no problem with the test is working properly.  I have remove the writing from my code null character and was able to verity that the test passes when executing the steps in the process and fails during execution of the steps in an external instance of LabWindows/CVI.

  The returned string contains what I wrote for her, and then the rest of the string is filled with the values that are in the memory allocated for the string.

  Here's my Question: is this the expected behavior for the original string values in TestStand between both types of stage performances?

  Thank you

  Chris Young

  In general teststand not Initializes the unused portion of the string buffer, so it is expected that the values of the memory after character no endpoint will be different, or even to each call. If you happen to be get zeros after the null terminator which was probably due to random character (i.e. the memory allocated just arrived already having zeros in there) or perhaps a debug setting you use perhaps in the Visual C runtime (if you are debugging the process in visual studio or modify visual C runtime heap parameter). TestStand is not initializaing memory after the null terminator character in both cases (I checked the code).

  -Doug

• cluster complex labwindows cvi

  Hello

  I'm trying to convert a LabVIEW LabWindows/CVI dll code to meet certain requirements of the processor. I'm passing a group of parameters and variables in the DLL, some of the elements which are arrays. My question is twofold:

  1. How to refer to values in the table that is passed as part of my structure?
  2. In what order are multidimensional arrays from LabVIEW to a DLL (column or row-major order)?

  To specify the number 1, if I have a type definition which reads as follows:

  typedef struct {

      int32 dimSizes[2];

      float64 Numeric[1];

   } TD2;

  typedef TD2 **TD2Hdl;

   

  typedef struct {

      int16 index1;

      int16 index2;

      TD2Hdl array;

  } TD1;

  And my function prototype reads:

  int myfcn (*TD1 input);

  How do I référenceriez the (index1, index2) two-dimensional array element array ? None of the following seem to work:

  input->array->Numeric[index1][index2];

  input->array->Numeric[index1 + index2*dim1];

  input->array[1][index1][index2];

  input->array[1][index1 + index2*dim1];

  etc.

  Where dim1 is the length of index1 . To specify the number 2, if I have a two table to a dimension that has two rows and two columns:

  [1, 2]

  [3, 4]

  It happened in the order line field in the list (1, 2, 3, 4), or in the order of the field column in the list (1, 3, 2, 4) to the DLL? This should be of the order of the values stored in input->array->Numeric If I'm not mistaken.

  Thank you very much

  Nathan

  In addition, as mentioned in our correspondence, LabVIEW passes arrays in the order line field and you can dereference the (i, j) element of the array by using the call:

  (*(Input->array))->elt[ j + i*numCols ];

  Where Input is your TD1 object passed as a pointer to your function, so the function prototype might look like:

  int myFcn ( *TD1 Input );

  Thanks for the help Daniel!

• Center a table in Word LabWindows

  Hi all!

  I create a table in Word using Microsoft Word 9.0 Object Library (word2000.fp) and I have a problem with a table in the document of centering. I have created table correctly but I can't focus on a table in the page of my document. I tired possible all means to Center a table but no result. I don't know what I'm doing wrong. Please help on the issue. Below, I add a piece of my code written in Labwindows/CVI:

  (DocHandle, NULL, Word_DocumentApplication, Word_GetProperty
  CAVT_OBJHANDLE, & appHandleL);
    
  Word_GetProperty (appHandleL, NULL, Word_ApplicationSelection,
  CAVT_OBJHANDLE, & currSelHandleL);
  addition of provision
  Word_SelectionTypeParagraph (currSelHandleL, NULL);
    
  Word_GetProperty (currSelHandleL, NULL, Word_SelectionRange,
  CAVT_OBJHANDLE, & rangeHandleL);
  creating a table
  Word_GetProperty (docHandle, NULL, Word_DocumentTables, CAVT_OBJHANDLE, & tablesHandleL);
     
  Word_TablesAdd (tablesHandleL, NULL, rangeHandleL, 5, 6, CA_VariantInt (1),)

  CA_VariantInt (0), & tableHandleL);
  Word_TableSelect (tableHandleL, NULL);
    
  a table of centering
  Word_GetProperty (currSelHandleL, NULL, Word_SelectionTables, CAVT_OBJHANDLE, & tablesHandleL);
  Word_SetProperty (tablesHandleL, Word_RowsWrapAroundText, CAVT_BOOL, NULL, FALSE);
  Word_SetProperty (tablesHandleL, NULL, Word_RowsAlignment, CAVT_LONG,

  WordConst_wdAlignRowCenter);

  What I am doing wrong? How must be properly it?

  I welcome Theodore

  Hi Tamas Simon,

  My version of the CVI and OS that I use it of: CVI 8.5 and Windows XP Professional SP3, but those who are well. I found the solution to my problem. The issue was lying in an incorrect use of objects (function called Word_SetProperty). I used the syntax:

  Word_SetProperty (tablesHandleL, WordConst_wdAlignRowCenter, CAVT_LONG, Word_RowsAlignment, NULL);

  and it should be like:

  Word_SetProperty (WordObjRows, NULL, Word_RowsAlignment, CAVT_LONG, WordConst_wdAlignRowCenter);

• tables dynamic thread-safe

  Hi all

  trying to convert my application single-threaded for multithreading, that I met a new obstacle:

  I would like to have a global data structure. This structure must be dynamically allocated and reallocated as the number of threads (and thus the size of the structure) depends on the program execute / user.

  The main thread as long as secondary threads should be able to access this structure, so I need to use a variable in thread safe, somehow. All the samples I've traveled so far, either use a single variable using the DefineThreadSafeScalarVar macro, or an array of size fixed by using the DefineThreadSafeArrayVar macro.

  I haven't found an example of this type of a dynamic array, unfortunately... Some kind soul would be willing to teach me how to proceed?

  Thank you

  Wolfgang

  In your case, you must use a TSV scalar that contains the pointer is allocated/re-allocated. See the following example of a TSV that mimics a dynamic array of integers. In some cases, a better solution would be to have a TSV scalar that contains a list, say, box tools ListType.

  #include

  DefineThreadSafeVar (int *, DynMem);

  void main (void)
  {
  int * pDynMem, i.;
     
  Initialize the TSV
  InitializeDynMem();
     
  Define HSV 'table' to hold 10 integers
  SetDynMem (malloc (10 * sizeof (int)));
     
  Set and get the 'elements' of TSV
  pDynMem = GetPointerToDynMem();
  for (i = 0; i< 10;="">
  {
  (* pDynMem) [i] = i;
  printf ("DynMem [%d] = %d\n", (* pDynMem) [i], i);
  }
  ReleasePointerToDynMem();
     
  Resize the TSV "array".
  pDynMem = GetPointerToDynMem();
  * pDynMem = realloc (* pDynMem, 20 * sizeof;)
  for (i = 10; I)< 20;="">
  (* pDynMem) [i] = i;
  for (i = 0; i< 20;="">
  printf ("DynMem [%d] = %d\n", (* pDynMem) [i], i);
  ReleasePointerToDynMem();
     
  Free TSV "array".
  pDynMem = GetPointerToDynMem();
  Free(*pDynMem);
  ReleasePointerToDynMem();
     
  Cancel initialization of TSV
  UninitializeDynMem();
  }

• The interface of the AVI with the PC using LabWindows/CVI

  Hi friends,

  I have a vector Network Analyzer Keysight Technologies / Agilent Technologies N5230A. I want to run with the LabWindows/CVI to measure channel 40 GHz. I want to interface the AVI with the PC using LabWindows/CVI. It is really essential for the measures, and I have no experience in doing these things. Would you please direct me to the best, easy as possible of this work? I'm really conscious of the fact that and thank you for your time and concern.

  Mohamed

  I have a vector Network Analyzer Keysight Technologies / Agilent Technologies N5230A. I want to run it with the LabWindows/CVI and measure channel 40 GHz. I want to interface the AVI with the PC using LabWindows/CVI. It is really essential to me, and I have no experience in doing these things. Would you please direct me to the track better, easy and correct these work? I'm really conscious of the fact that and thank you for your time and concern.

  Mohamed

• Real-time execution trace toolkit to optimize the Labwindows/CVI code

  Hello

  I am trying to optimize a code in real-time in LabWindows/CVI by minimizing the time of each section of the code is taking and find bottlenecks in the code. I check this time using the real-time execution trace toolkit.

  However, I just found it seems to be a constant error when you use the tool of real-time execution trace.

  When I put the traceviewer 'start' and 'stop' right after the other, I get around shift schedule 9us. It seems that the CPU will in some "idle" after the start of the trace mode, or maybe it's the time of communication or something.

  I'd appreciate it if someone could give me an idea of why this is happening. The time of real-time application window is very limited and I'm trying to minimize the time as much as possible. Even the United States 9 error is difficult to resell.

  I used the following code:

  TraceConfigure (1, 1, 0, 25000, NULL);
  
  TraceStart ();
  
  TraceStopAndSend (HOST_ADDRESS);

  and there is a photo in the toolkit of real-time execution trace.

  Thank you.

  Generally, you might be better off picking off the clock at the beginning and end of what you want to track. RTETT my introduce overhead that becomes difficult to quantify... Which is what you probably already see. The debug mode will also implement a ton of overhead. Then... Destemming of the clock in release mode will probably give you you the best estimate.

• LabWindows CVI and debugging dll MSVC ++

  We use a written LabWindows/CVI DLLS in the code for Teststand module. This DLL calls a DLL written in MSVC ++.  Is it possible to use the debugger of Labwindows/CVI debug this DLL MSVC ++ (if this DLL MSVC ++ is built with 'good' options)?  Or is possible only using the environment of development MSVC ++?

  Hello mkossmann,

  The CVI compiler generates different types of than MSVC debugging information.

  The debugger CVI doen't understand the debugging information generated by MSVC, so you cannot debug the dll compiled in MSVC.

  Constantin

• LabWindows/CVI cannot compile a simple code

  Hi all!

  It's looks funny but LabWindows/CVI-9.1.0(427) cannot compile a simple C code

  XML.h

  void f();

  XML.c

  #include 'xml.h.

  typedef struct
  {
  int bar;

  } foo;

  void f()
  {
  int Baz = 0;
  If (!) Baz) baz = 1;
  foop foo;
  return;
  }

  It's not a bug, you make a statement block to a variable foop which is not allowed in the standard ANSI C89.

  You can activate the C99 extensions with a pragma if you want this to work in CVI 9.1

  Menchar

• LabWindows CVI RS-232 is not fast enough

  Hello

  Is it possible to write a C program which takes RS-232 data buffers and prints it on the screen?

  I ask this question because I write a program in LabWindows CVI and the data is not correct. I used SimpleTerm Gold to see what data are supposed to look like, but CVI misses some. I believe it is not fast enough and therefore lack of data.

  A C program (do not use the functions or reminders CVI) would be possible and better?

  Is it possible to make the CVI to work faster? I changed the environmental policy of the previous "do not sleep". There are two ComRdTerm because we're not getting all the other packages.

  Rate 115200 baud, no parity, 8 data bits and 1 stop bit. Most of the data I receive are 313 bytes and the smallest is 17.

  Any help would be MUCH appreciated as I am completely puzzled.
  Thank you

  Code is below.

  OpenComConfig (com, "COM9", 115 200 Baud, 8, 1, 0, 1024, 1024); / /< opens="" serial="" ports="">
  SetComTime (com, 0); / /< sets="" serial="" port="" to="" never="" time="" out="">
  T0 = clock(); / /< calculate="" how="" fast="" comrdterm="" is="">
  bytes_read0 = ComRdTerm (com, & buffer0 [0], 314, 10); / / read com and store it in the buffer
  sprintf (p_check0,"%.4s" & buffer0 [0]);
  T0 = clock() - t0;
  Double time_taken0 = ((double) t0) / CLOCKS_PER_SEC; / / in seconds
  printf("%d\t%f\t%s\n",bytes_read0,time_taken0,&buffer0[0]);
  Memset (buffer0, 0, strlen (buffer0)); / / Clears the buffer

  T1 = clock();
  bytes_read1 = ComRdTerm (com, & buf1 [0], 314, 10);
  sprintf (p_check1,"%.4s" & buffer1 [0]);
  T1 = clock() - t1;
  Double time_taken1 = ((double) t1) / CLOCKS_PER_SEC;
  printf("%d\t%f\t%s\n",bytes_read1,time_taken1,&Buffer1[0]);
  Memset (buf1, 0, strlen (buffer1));

  Thanks for all the help guys. I finally found the solution. The program was running too slow because I kept opening and configure ports (not shown in the code) I simply kept open ports and it works fine.

  I appreciate all the comments and insight. Each of them will definitely help me still to develop with CVI.

  Kind regards
  Keegan.R

• 6632A HP - tension - Labwindows CVI

  Hi all

  I'm trying to settle the tension of HP 6632 A with Labwindows CVI. The initialization succeeds (1) If no application ID and no reset command is sent and fails (2) if the two is sent (error occurred during the transfer of Bus) (see update below). Then when I try to set up/set the output by using the function below, I get an error BFFF0038 code - Bus error occurred during the transfer (1) or BFFF000E - invalid session handle (2).

  I checked tha MAX and match the GPIB address there with what is represented on the food. It also responds to the request to id it.  I use the driver of instruments provided by OR to talk to the device by the USB-GPIB converter of NOR.

  Am I missing a step here? I set up the device in a certain way before use?

  Thank you!

  Initialization (send request Id and reset the order)
  
      int error_int = hpe363xa_init ("GPIB::0 (', VI_ON, VI_ON, & g_instrumentHandle1);
  
      char chaine_erreur [100];
  
      FMT (chaine_erreur, "%x", error_int);
  
  MessagePopup ("Return Value Init", chaine_erreur);  <- error="" bfff0038="" bus="" error="" occurred="" during="">
  Config to activate the output
  
      error_int = hpe363xa_configOutput3632 (g_instrumentHandle1, VI_OFF);
  FMT (chaine_erreur, "%x", error_int);
  
      MessagePopup ('Return value Config', chaine_erreur);  <- error="" bfff000e="" invalid="" session="">
  Set the voltage to 12 V
  
      error_int = hpe363xa_outputSetOperate3632 (g_instrumentHandle1, VI_OFF, 12.0, 1.0, VI_ON);
  FMT (chaine_erreur, "%x", error_int);
  
      MessagePopup ('Return Value Set', chaine_erreur);  <- error="" bfff000e="" invalid="" session="">
  
  

  Device: HP 6632 has DC power supply by Labwindows CVI.

  Connection: NI GPIB-USB connection Cable

  Pilot: Labwindows Plug & Play

  Language: Labwindows 2013

  OS: Windows 7

  Edit1:

  I just realized that I'm not sends a request id and a reset command during initialization of the device. I've updated the code above. Unfortunately, I get an error code if I do and the devicehandle is not set! The game features following fail later.

  You also use the bad for a HP6632A instrument driver. The hpe363xa driver is for models E3631A, E3632A and E3634A.

  You must instead use the driver available to ... http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E929C659CE034080020E748 .

• Where can I find NEITHER-HSDIO SMU 6556 LabWindows CVI examples?

  Greetings!

  I am looking for examples LabWindows CVI or a help file that shows the function or api calls to control the attributes of progrannable of the HSDIO SMU 6556/6555.

  Ken Grohman

  Hi Ken;

  "' You can find examples for the NOR-HSDIO in the example LabWindows CVI Finder by clicking on help > NOR example Finder and navigate to the material input and output" Modular Instruments ' NOR-HSDIO; "" "" or you can search in Start "all programs" National Instruments "NOR-HSDIO ' examples.

  http://zone.NI.com/reference/en-XX/help/370520J-01/HSDIO/using_ni_hsdio_in_labwindows_cvi/

  Just make sure that when you installed the driver, you have also installed the Application Development Enviroment Support for LabWindows CVI, otherwise the examples will not be there.

  Best regards;

  Pedro Muñoz

• Why can I not use my labview controls created dll in labwindow CVI?

  I created a DLL in LabVIEW for run of LabWindows/CVI.  The DLL is started very well but I have no control on the GUI.  Why and how can I use this GUI controls?

  I found the solution on the following thread.

  http://forums.NI.com/NI/board/message?board.ID=180&message.ID=36951&query.ID=314335#M36951

• LabWindows CVI Full recommended OI does not start

  I made an installer of deployment Teststand-2013. On a target PC (Windows 7 64-bit) it works fine. But on another target PC starting the Labwindows/CVI Full IO recommended (attached screenshot) fails with an error-145 when trying to load testexec.uir. Both targets have Windows7 64-bit and Office 2010 installed. How will I know what ActiveX control is missing or damaged on the second PC?

  I found http://digital.ni.com/public.nsf/allkb/9894BE2B832B7FDE86256ECD00041172. But the Office is installed, and ActiveX Control Pad is obsolete and incompatible for Windows7 64 Bit and is no longer available from Ms.

  mkossmann,

  You can use the option "Hide the license dialog box" on the Installation Options tab. This will not prompt the user to activate TestStand until they try to open the software after installation. What is the desired behavior?

• Error selection LabWindows CVI Card Configuration

  I am trying to enter the Lab Windows CVI 2012 of TestStand 2012.  When I try to configure LabWindows CVI adapter to

  c:\Users\Public\Public Documents\National Instruments\TestStand 2012\Adapter Support\CVI\tscvirun.prj the window changes the path to

  c:\Users\Public\Documents\National Instruments\TestStand 2012\Adapter Support\CVI\tscvirun.prj and displays the message that it cannot find the file.  I use Windows 7 if that makes a difference.

  Hi herbertwatson,

  I have attached my tscviprj.ini. I have two TestStand 2010 and 2012 TestStand, installed on my machine but the ini is only in the 2010 directory. It is possible, he just needs to be an ini for TestStand work with all facilities CVI. Try to place it in the same directory as your tscvirun.prj for 2012.

  If this does not work, it may be useful CVI, TestStand and then reinstall.

  Kind regards