output string of rolling

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• Python, call DLLs in LabVIEW: Fatal internal error when accessing output String Cluster

  Hello

  We have compiled a DLL in LabVIEW (TestError.dll) and tried to call it from Python.

  TestError.dll includes 2 functions:

  1 testErreur: cluster 1 entry string, 1 channel indicator

  2 TestError2: 1 channel input, 1 bunch of output string

  What we try to do in Python is actually something like this:

  1 provide values to controls in the functions of the DLL.

  2. call the DLL.

  3 get the values of the indicators.

  What we have seen are:

  1 read/write operations on normal data types (string, digital) indicators/controls are OK

  2. write operation on the Cluster string entry is OK

  3. read operation on the Cluster output string is not OK. The following error is still prompted for:

  «Unrecoverable internal error: 'MemoryManager.cpp', line 437.» LabVIEW version 8.6... »

  Also joined the TestError.prj and python code.

  Grateful if someone can help to explain why we get this error and how to overcome?

  Thank you

  howmean

  What we have seen are:

  1 read/write operations on normal data types (string, digital) indicators/controls are OK

  2. write operation on the Cluster string entry is OK

  3. read operation on the Cluster output string is not OK. The following error is still prompted for:

  «Unrecoverable internal error: 'MemoryManager.cpp', line 437.» LabVIEW version 8.6... »

  Also joined the TestError.prj and python code.

  It is very logical that it does not, and the bad news is, it cannot really be implemented reliable of a process not LabVIEW.

  LabVIEW channels (and tables) are very specific species. They are then called handles, which are pointers to a pointer to a block of memory. If you have a control or indicator on its own, the Prototype configuration allows you to configure this setting as a C. LabVIEW data pointer, when creating the DLL, create heels C for each exported function and place the code to do the translation between the past C pointer to and necessary LabVIEW data handle. For strings and arrays within the cluster, there is no configuration option and the DLL is expected to pass a structure with data handles native LabVIEW in there.

  You may say that creating handles data in your calling process enough to trick LabVIEW. For the input variables that actually CAN sometimes work (but is a delicate and dangerous generally to handle this). There is no way to make it work for output variables. LabVIEW will try to resize handle to fill data in that he wants to make. This resizing is done using internal memory manager of LabVIEW. This will work only if it had been allocated by EXACTLY the same instance of the memory manager. Otherwise, it refers to a different memory segment and catastophally fail. The only way to make this work perhaps, with luck, taking your heart and prayer to the gods, is to lvrt.dll to allocate a handle that you must pass to the DLL. Still find the good lvrt.dll, which will execute your DLL LabVIEW is a major challenge.

• VISA read lose characters beyond the end of the output string

  Hello

  I wrote a VI to take a string of output data of an ardunio Uno and analysand. I use the vi read Visa to enter the output channel of the unit. In the end I will connect a device that actually gives the value in this type of format string: (#80212164,2289,2292,2296,2300,2328,2289,2297,2290,2300,2308,2292,2295,2298,2289,22,24,0 *).

  So after a large number of loops, the program starts to drop the last characters of the string that it generates. If the string of Visa Read output reads something like (#80212164,2289,2292,2296,2300,2328,2289,2297,2290,2300,2308,2292,2295,2298,2289,22,24,). The only way to solve this problem, once it has occurred must completely close labview (completely). Once I open again and start the program running, all is well in the world.

  Has anyone had this problem? I tried to debug it in different ways and the only weird symptom I have other Visa Read function lose a few characters of the string is the fact that by looking at the bytes to the Port after I read visa, is that she starts showing five bytes instead of zero.

  my last attempt at resolving this issue is attached.

  Note: The Ardunio outputs a string of this format every 2 seconds with the values being incrimental on a specified range. (80212164,2289,2292,2296,2300,2328,2289,2297,2290,2300,2308,2292,2295,2298,2289,22,24,0 # *)

  You can configure the * your character of termination if your Arduino does not send the carriage return or line feed.  Use the configure a Serial Port to ensure that your settings are correct.  You can also use this VI to increase your timeout so that you no longer need your waiting.

• Display the test using the output "string" indicator?

  Hi, I'm trying out the test to the indicator of string data as you can see below,

  but with 'For' the logic of loop that it is only the display last number, so if you run this, you'll see

  following output.

  Test #6

  If I move the concatenation of string outside of the loop block, you will see the result as below.

  Test #0123456

  However, I want to achieve more of output. Can someone suggest me a way to do it?

  By the way, I use the for loop.

  The output I want to display with the for loop

  Test #0

  1

  2

  3

  4

  5

  6

  Thank you

  

  Close but no cigar.

  You need concatenate the string using a shift register.

  

  This will be the output:

  

• interpretation of TCP read the output string

  What is the right method to interpret the data from the TCP Read function? The output is a string of characters, which are obviously not hexadecimal values. How can I convert the string to a binary table or bytes?

  OK, time wild guess...

  The first four bytes are an indication for SYNCHRONIZATION

  The four bytes 0 4 0 0 is a 32-bit integer, GIS bytes less first. 1024

  Then you have 6 0 0 0, which could be another 32-bit integer, lsb first. 6

  Then your random data

  Rod.

• Only the first 70 characters of an output string

  Hey this is probably an easy question for anyone to answer. I googled and could not find anything. I'm a value in a table, it's more than 70 characters long, but when I use DBMS_OUTPUT. Put_line I want only the first 70 characters of output. How can I do this?
  
  Thank you!

  SUBSTR

• How to read file and output string base64?

  im a moment difficult reading binary file and converting it to base64.

  is there a setting to extendscript as file.read ('base64')?

  It is possible in HTML:

  var path ="/tmp/test";

  result = window.cep.fs.readFile(path, cep.encoding.Base64);

  if(0== result.err) {

      //success

      var base64Data = result.data;

      var data = cep.encoding.convertion.b64_to_utf8(base64Data);

  }

  else{

      ...// fail

  }

  Alternatively, you can refer to the following examples for more examples:

  https://github.com/Adobe-CEP/samples/tree/master/Flickr

  https://github.com/Adobe-CEP/samples/tree/master/collage

• "& amp;' and ';'" Banned in output strings?

  This is a new problem, but with the same project as my last. I get the error text from the attached code. If I remove the ampersands, I get the same error for my semicolons. I tried to double ampersands to escape them as citations and the pound signs, but he complains only ' & & ' rather than '& '. Any ideas are appreciated.
  
  

  Quote:
  Invalid CFML construction found on line 1 in column 1.
  ColdFusion has been looking at the following:
  
  &
  
  The error occurred in C:\ColdFusion8\wwwroot\Example\insert.cfm: line 85
  
  83: < table >
  84: < td >
  85: #IIF(is_public IS NOT 0, check, cross) #.
  86: < table >
  87: < /tr >
  
  Resources:
  
  * See the ColdFusion documentation to verify that you are using the correct syntax.
  * Search the Knowledge Base to find a solution to your problem.
  
  Browser Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; RV:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6
  Remote address 127.0.0.1
  Referrer
  Date/time 22 February 08 18:35
  Stack trace
  to cfinsert2ecfm948755649.runPage(C:\ColdFusion8\wwwroot\Example\insert.cfm:85)

• several entries of channels in the single string output

  Hi all

  This program is needed for my purposes of simulation of demo, I created several string entries to display in an single string output Update (input strings are shown in each line). I have attached the picture below, put the 2 channels of output w/c both unresponsive to my desired outcome:

  1.) 1st output string - replace the old string w / new channel. what I need is to also maintain the previous channels. the new channel will go to the next line.

  2.) 2nd out of chain - although I got all the channels that I needed, it only appears on the right after the while loop ends, so I couldn't update string entries.

  I use LV 8.5.1, any help is appreciated... post your correct code will be more appreciated.

  Thanks in advance...

  

  You can also use a node Feeback. Note that you can use the Format function in the string to create your lines.

• Please help, convert this string to a number format

  I send orders via RS232 to my machine and the machine sent back with a display of the number "40" in display normal in my image attatched. I tried to use the string conversion to digital tools, but there is nothing happen just '0 '.

  I wondered with it, then I try output string in a different way as in attached code, display and hex display and see the format of it.

  I want to get the string '40' to take the number, how can I get it? Help, please

  

  Thank you in advance.

  It has worked well for me. Just to be on the safe side, you can use the Trim function spaces (channels palette) to clear the characters "\".

  

  Steve

• Determine if a string contains an expression of certain

  Hi all

  I feel that there should be a simple way to do this, but I was not able to understand after browsing these forums, the help of LV and Google.

  I just want to get in a string and returns true if it is false if is not to determine if it contains a certain expression. I understand there are regular expression screw, as model of matching and Match Regex, but those who return substrings; I want just a Boolean value returned. I could use the VI regular expression corresponds to analyze output strings to determine if it finds a match and returns a Boolean value from there, but I feel like there is a way better and simpler I forget.

  In the subpalette of 'additional string functions' I see there first Match string and string of true/false game, but using the first Match string seems like it would complicate what I try to do, and I don't yet know what game true/false String; detailed help is always confusing.

  Thanks for any help!

  There are simple ways. Read the help associated with search string functions! Each of them returns the offset of the found string. It is - 1 if it is not found. A simple function to Less Than Zero can be connected to this to return a Boolean value. Another way is to compare the substring returned by the function of empty string.

• matches the first string

  Hi all

  Someone at - it no VI example for function of "match"?

  Thank you

  Something like this should do the trick (almost).

  Kind regards

  Marco

  PS almost, because the output string will be lowercase.

  

• Concatenate the hex strings

  In the attached example, VI is there a way to have the 1 b be represented as Hex instead of ASCii after the output string concatenation? Why function concatenate strings automatically converts the 1B in ASCII?

  Rather than convert the number to a string of ASCII characters, you should change the representation of the byte in a string. If you always want only a single byte, use the U8 instead of I32 data type. Convert an array of U8. Convert to string. Concatenate. Lynn

• create a hexadecimal string

  I want to send a hexadecimal string to a device.

  0000 0000 0006 0103 2 0001 07D

  If I send the string as written above, I get the expected response.

  2 07D is a register number and I would like the user to be able to choose the register. I created this code to see if I could insert the hex string required in the full string. (Note that string constants are in hexadecimal display)

  It works very well, producing the correct hexadecimal string, 0000 0000 0006 0103 2 0001 07D.  I send the string and the device reacts as expected.

  Since I want the user to be able to choose the registry I created a mechanism for it and replaced the constant substring (07D 2) with this code.

  (Note that the value entered in the D - Reg control no. 2003)

  Although the conversion of a hexadecimal string of product 07D I16 control 2, replace the hexagonal result string of the function subset string produces this, 0000 0000 0006 0103 3037 4432 0001.

  Can anyone offer advice or perhaps suggest another method?

  Thank you.

  John.

  First of all, when the formatting strings, you're better off the coast using the Vi of string marker rather than replace elements in a string. However, in this case your string format is retrungin you the representation of ASCII number and, therefore, you get an incorrect value in the output string. What you need to do is to replace the bytes of the string with the actual binary data, not the ASCII representation. One way to do this is to simply flatten the number to a string, then replace the bytes. You can also convert the number as well, and then replace the data. Here is an example.

  

• output analog dc offset

  When I use the example of the expedition:

  'Cont Gen tension Wmf - Ext Clk.vi' I get the out waveform on the analog channel without problem.  When I stop the vi there is always a level 3 of VCC on my output string.  This isn't there until after I have stop waveform generation.

  W that happens any AO channel.

  LabVIEW 2009

  PXI6723

  First of all, I would like to use the task to stop DAQmx to stop the acquisition.  If she is not reset that, write an acutal 0 to all channels.  These two must be made before the task is disabled.