Bug: DAQmxReadAnalogF64 (DAQmx_Val_Auto, DAQmx_Val_WaitInfinitely) sometimes overruns or inadequate returns of samples, loop

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  wtfeva wrote:

  Anywho, the use of battery controller, located inside devmon has a cool little chart that has recently been distorted (hard to explain without screenshots) when you use the option ' since last Charge.

  Has nothing changed just before this behavior started? A new application? An update of sorts?

  Did you base... restart?

  wtfeva wrote:

  I use the Release10.3.2.556/OS Version of the 10.3.2.858 software. On AT & T.

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  -----------
  My Blog: http://www.inside-oracle-apex.com
  APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
  Twitter: http://www.twitter.com/patrickwolf

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  Hello

  I use a card PCI-6013-NOR and used DAQ_Op and DAQ_Start to acquire the data of the device (with game 1 win), who have a CCD camera to acquire data.

  I migrated the DAQmx application, it works fine, but the intensity of the curve drawn using data is lower than expected.

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  /*------------------------------------------------------------------------------------------------*/

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  DAQmxStartTask (ulTaskHandle);

  / * Allocation of memory for data acquisition. */
  Double * pDataBuf = new double [ulCount + 1];

  long lSamplesToRead = (long) ulCount;
  long lSampsPerChanRead = 0;

  DAQmxReadAnalogF64 (ulTaskHandle, DAQmx_Val_Auto, DAQmx_Val_WaitInfinitely, DAQmx_Val_GroupByChannel, pDataBuf, lSamplesToRead, & lSampsPerChanRead, NULL);

  If (ulCount! = (unsigned long) lSampsPerChanRead)
  {
  }
  on the other
  {
  for (unsigned long ulIdx = 0; ulIdx)< ulcount;="">
  {

  / * psBuffer is a short table.

  * Here, I'm trying to convert and copy the new buffer (double value)

  * to the old buffer (short values)

  *

  * I guess that old values will be in the millivolts range.

  * To convert the values of v of the buffer in millivolt I am multiplying by 1000

  *

  * I don't know if it is true.

  *(psBuffer+ulIdx) = static_cast((*(pDataBuf+ulIdx) * 1000));
  }
  }

  I'm not sure whether the conversion I did new buffer for old buffer is true. I need to create a DAQmx_Val_FromCustomScale to get the same value DAQ_Op returned?

  Could you find something wrong with the logic? How can I get the same DAQ_Op value returned by the double buffer returned by DAQmxReadAnalogF64() is there any best mechanism available?

  concerning

  Praveen.DA

  The reason for your bug is that you apparently did not understand what does the DAQ_Op function. In help for this, it is clearly stated that the data returned is I16. Your choice of data F64 was an obvious conflict with how you have porgrammed traditional in DAQ board. The Council resolution doesn't really matter. The big difference is set to scale and without scales.

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