DAQmx error strings (for analog sampling)

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• DAQmx error: DAQmx Every N samples transferred the event buffer is not d support channel types

  Hello

  Trying to get my new ni9263 below is the steps:

  DAQmxErrChk (DAQmxCreateTask("",&taskHandle));
  DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandle,"Dev1/ao0","",-10,10,DAQmx_Val_Volts,)); NOR-USB 9263
  DAQmxErrChk (DAQmxCfgSampClkTiming (taskHandle,"" SAMPLE_RATE, DAQmx_Val_Rising, DAQmx_Val_ContSamps, SAMPLE_SIZE));

  DAQmxErrChk (DAQmxCfgOutputBuffer (taskHandle, OUTPUT_BUFFER_SIZE));

  DAQmxErrChk (DAQmxRegisterDoneEvent(taskHandle,0,DoneCallback,));

  DAQmxErrChk (DAQmxRegisterEveryNSamplesEvent (taskHandle, DAQmx_Val_Transferred_From_Buffer, EVERY_N_SAMPLES, 0, EveryNSamplesCallbackAO, NULL));
  DAQmxSetWriteRegenMode (taskHandle, DAQmx_Val_DoNotAllowRegen);

  Then I do my writing code and start the task

  When I move my code in my application hangs when it comes to DAQmxRegisterEveryNSamplesEvent with the following error

  DAQmx error: DAQmx Every N samples transferred the event buffer is not d support channel types

  Status code :-200980

  Any idea?

  Greetings;

  When you're talking about an alternative, do you mean a sleeve of spare or chassis or an alternative in the code?

  If it's a matter of code, then you probably need to change your software architecture to adapt the capacity of the installation. In order to avoid to use the FIFO and so have the problem you are experiencing, you avoid needing to register for this event? A few examples on different architectures is on the following link:

  http://www.NI.com/white-paper/6999/en

  Kind regards

  Simon Perez

• Adding new SCSI controller: "error string: invalid operation for the '0' device.»

  Hello

  I have a problem when I try to add a SCSI controller to a virtual machine.

  I have this error:

  Error string: invalid operation for the device '0'.

  Lack of details: InvalidDeviceOperation

  Here is my code:

  my $info = Description-> new (label = > summary of "" SCSI controller 2 ' = > 'LSI Logic parallel' ");

  my $controller = VirtualLsiLogicController-> new)

  deviceInfo = > $info,

  scsiCtlrUnitNumber = > '7'.

  sharedBus = > VirtualSCSISharing-> new ('noSharing'),

  busNumber = >-1,

  key = >-1,

  backup = > $backing_info,

  controllerKey = > 100,

  );

  My $devspec = VirtualDeviceConfigSpec-> new (operation = > VirtualDeviceConfigSpecOperation-> new ('add'),)

  device = > $controller,

  fileOperation = > VirtualDeviceConfigSpecFileOperation-> new ('create').

  );

  My $vmspec = VirtualMachineConfigSpec-> new (deviceChange = > [$devspec]);

  {eval

  $vm_view-> ReconfigVM (spec = > $vmspec);

  Util::trace (0, "Controller has been created. \n") ;

  };

  I don't know how to handle, or even how to solve problems.

  Any ideas would be greatly appreciated.

  Kind regards

  Jeremy

  I finally found a solution.

  It seems that it fails if you give a marked as mandatory parameter (scsiCtlrUnitNumber, hotAddRemove)... Theses parameters seem to be set automatically, a dump of the device which will show.

  Here's the code used:

  My = $controller_spec

  VirtualDeviceConfigSpec-> new (device-online VirtualLsiLogicController-> new (key-online 0

  device-online [0],

  busNumber => $scsi_controller.

  sharedBus => VirtualSCSISharing-> new ('noSharing')),

  operation => VirtualDeviceConfigSpecOperation-> new ('Add'));

  My $vmspec = VirtualMachineConfigSpec-> new (deviceChange-online [$controller_spec]);

  {eval

  $vm_view-> ReconfigVM (spec-online $vmspec);

  };

• NiDAQmx limits the maximum number of analog samples which can be read / buffer?

  I try all the time on a USB-6363 to 1000 Hz 2 channels analog samples.  Everything works until I have started to increase the number of samples to read only once in DAQmxReadAnalogF64().

  I have set up the buffer in DAQmxCfgSampClkTiming() like twice the amount of samples, I want to read at some point.

  Up to about 8000 samples (128 000 bytes: sizeof (double) x 8000 x 2ch) it works and read call returns without delay once all about 8 seconds.  Increasing the number of samples other than that, I can no longer read the data (the DAQmxReadAnalogF64() always holler times).

  Question: am I running in a limit on the maximum number of samples that can be read or buffered... maybe a DMA limit any?  What determines how big you can make the buffer in DAQmxCfgSampClkTiming()?

  Maybe it's not obvious, according to the documentation, but if you look at the output value of the parameter samples per channel function DAQmxReadAnalogF64 reading, you'll see that when it times out, he reads what was available when it has expired. So if you're always calling this function, and your timeout value is too short, then you'll always be timeout, but you will always catch all samples. You can view this as the function will return when the buffer is full, or the timeout is reached. That's why we have provided an exit indicating the number of samples read.

  As a general rule, ask not read like this with DAQmx. I would recommend registering a callback for EveryNSamples (there is an example that's bundled with the CVI on how to do this), or by specifying a longer period than what it will take to gather real that many samples (in your case, 8000 samples at 1 kHz would be > 8 seconds). The main problem with the polling stations with a short time-out is that you should ignore errors that is not recommended.

• Error 200010 not generating error string

  Hello

  I have therefore a situation where I use a task redeclenchables DAQ to acquire data, and just recently, I had a problem came. I have the diagram following error-capture. On the appropriate line, I have:

  if(ev = DAQmxStopTask(ce.cTask)) { goto error; }
  

  Who goes to the 'error' of the program area (where I do garbage collection operation, error popups, etc., basically emulating the try-catch statements):

     error:
  
      if(ce_locked) {
          CmtReleaseLock(lock_ce);
      }
  
      SetCtrlVal(mc.mainstatus[1], mc.mainstatus[0], 0);  // Experiment is done!
      SetCtrlAttribute(mc.mainstatus[1], mc.mainstatus[0], ATTR_LABEL_TEXT, "Stopped");
      SetRunning(0);
  
      if(data != NULL)  { free(data); }
      if(avg_data != NULL) { free(avg_data); }
  
      if(ev)  {
          if((ev < -247 && ev >= -250) || (ev < -6201 && ev >= -6224)) {
              display_ddc_error(ev);
          } else {
              uInt32 es_size = DAQmxGetExtendedErrorInfo(NULL, 0);
  
              char *es = malloc((es_size > 0)?(es_size+1):100);
  
              if(es_size > 0) {
                  DAQmxGetExtendedErrorInfo(es, es_size);
              } else {
                  sprintf(es, "Unknown DAQmx Error, code was %d", ev);
              }
  
              MessagePopup("DAQmx Error", es);
              free(es);
          }
      }
  

  I use a USB-6229 M Series DAQ, ce.cTask is a task of counter, which is built (without raising errors) to be triggered by an external channel, and then trigger a square wave that triggers each point in the acquisition by another task, ce.aTask. He has done this way so that I can do things like acquiring 2 seconds, wait a varied amount of time, then acquire for another 2 seconds. Currently, what I do is simpler than ce.cTask is on/Dev1/ctr0 and ce.aTask is triggered by Ctr0InternalOutput. It has always worked in the past.

  I've been through with breakpoints and it certainly seems like triggers of ce.cTask very well, all data are read in by aTask and everything's going peachy keen without error until the line where I try to stop ce.cTask. This throws me error 200010, but DAQmxGetExtendedErrorInfo (NULL, 0) returns 0, and if I just encode in hard es_size to something like 10, I had an empty string. I see no error description 200010 everywhere online, other than a few forum posts related to read buffer overruns, I highly doubt the question to stop a meter spot. No idea how to solve this problem?

  Edit:

  I changed the audit for this errors:

  if(ev = DAQmxStopTask(ce.cTask)) { if(ev != 200010) { goto error; } }
  

  Things are working as they did before, and I've seen no consequence. I'm still a little worried that I hardcode in a mechanism to ignore a specific error code, however.

  Hello, passing this error code to the DAQmxGetErrorString function returns the text "over acquisition or generation has been stopped until the required number of samples have been acquired or generated": it seems that if you stopped the task early, then you can check your code for such a condition. Using the function DAQmxIsTaskDone can help you avoid this condition.

  I'm not sure about this, but the reason why the DAQmxGetExtendedErrorInfo does not return a any description can reside in a function any DaqMx which is performed without error after that you get the original error (maybe in your function SetRunning?): DAQmxGetExtendedErrorInfo returns meaningful information after a service error, so you must use DAQmxGetErrorString instead if you need perform certain other functions DaqMx before developing the error code to give information the operator. Alternatively, you can store extended information and error code before you clean up your environment and warn the operator after this moment with the information in memory.

• PL/SQL: digital or value error: string buffer too small characters - LOV?

  Environment:
  
  APEX 3.1.1.00.09 under AIX 5.3 10.2.0.2 in
  
  Problem sample on apex.oracle.com:
  
  Workspace: GALWAY
  ID: GWICKE
  Password: GWICKE
  
  Application ID: 43172 (BUILDERPL) NOTE: there are three 3 applications with the same name, but this one is currently broken
  
  I get the dreaded "" ORA-06502: PL/SQL: digital or value error: character string buffer too small "when you try to create a new line."
  
  To reproduce the error:
  
  1 run page 3
  2 - Select any agency
  3 - Click on the button "create a new contract.
  4 - Select the start and end dates in the DATE picker
  5 - Click on the button "Add contract".
  
  If the line is added successfully if please go to Indianapolis and run the app for me since you obviously have the 'touch '! ;-) >
  
  But seriously folks,
  
  I've read many threads about this error and for the most part, they seem to point to large LOV. I have three 3 LOV on the page but only a 1 is dynamic and display and back elements are the same, a description in this case. There are 400 lines in the LOV table and the description is defined as VARCHAR2 (75), so we're not talking a huge amount of data.
  
  To further complicate the issue, this application was working just a couple of days. What changes I've made since a few days, you might ask?
  
  The only thing that comes to mind is I did go through the definitions of element and change the values of maximum size equal to the size of the columns in the target table, using a value of 22 for the NUMBER of columns.
  
  Since then I went back and changed at a much greater value than their corresponding column definitions, but nothing helped.
  
  Another interesting fact is that if an existing contract is selected on the page (Page 3 in my case) by selecting an agency that produces values in the second select list (selection of contract) and then clicking on "change this contract." After you change any value or fill in one of the missing values, click "Apply Changes" and he should have success.
  
  The new contract page and the page of modification of the contract are the same (Page 2) just with different buttons.
  
  Thanks a lot for any assistance. Indeed, it is greatly appreciated.
  
  -gary
  
  PS I also tried to change the LOV both given a popup and a standard text box I typed in, both received the same message.

  Gary - I deleted then recreated your DML process and it seems to have solved the problem. Export page reveals something odd in the process definition:

  declare  p varchar2(32767) := null;  l_clob clob;  l_length number := 1;beginp:=p||'F|#OWNER#:BUILDERPL_CONTRACT:P2_CONTRACT_SEQ:CONTRACT_SEQ|I';
  
  wwv_flow_api.create_page_process( ...
  

  That the assignment statement must not have ' F | "as the first two characters. There must be a bug in one of the wizards who created the process. Have you used a wizard to create the page?

  Scott

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  I want to save the captured digital answer and save it in a file in spreadsheet showing the timestamp for each sample. How can I go to a digital waveform to a worksheet that contains all samples and timestamps for each sample?

  Comvert digital to analog is just the wrong function. And when you converted to U8, you just threw the calendar information. Try the code below. He puts the time in a single column. If you want to only two columns, its an easy mod.

  

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  Nicolas

  You can use the Format function in the chain.

  Ben64

  

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