Assigning PFI lines to counter

[Hiren]

Have anybody out there used "DAQmxSetCIFreqTerm" function on CVI before for PCI6221 DAQ card?

[AlanArmstead]

Ok, so ignore my previous post.  The second parameter is the channel name parameter that was used with the DAQmx Create Channel function.  If you left it blank, i.e. "", you can leave the second parameter blank.  The third parameter is the PFI line that you want to route the signal to.  You will need to use syntax like "/Dev1/PFIx".  Sorry about the confusion.

-Alan A.

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
    samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
     samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
      samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
       samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
        samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
         samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Alan,

Thanks for the input. I have tried this but it still do not want to work. Here is my function I am trying to use, look at it and tell me what I am doing worng here.

int readFrequency(short sample)
{
 int32 sampleRead,
          samples;
 float64 freqRead[1024],
     freqReadAve;
 int i;

 freqReadAve = 0.0;
 samples = (int32) sample;
 DAQmxCreateTask ("", &freqTask);
 DAQmxCreateCIFreqChan (freqTask, "Dev1/ctr0", "", 2.0, 600000.0,
          DAQmx_Val_Hz, DAQmx_Val_Rising,
          DAQmx_Val_LowFreq1Ctr, 5, 4, "");
 
 DAQmxCfgImplicitTiming (freqTask, DAQmx_Val_FiniteSamps, samples);
/DAQmxSetCIFreqTerm(freqTask, "/Dev1/PFI8", "/Dev1/PFI8");

 DAQmxStartTask (freqTask);
 DAQmxReadCounterF64 (freqTask, samples, 2.0, freqRead, 1024, &sampleRead, 0);

 DAQmxStopTask (freqTask);
 DAQmxClearTask (freqTask);

 for(i = 0; i < sampleRead; i++)
  freqReadAve += freqRead[i];
 
 measuredFreq = (double)freqReadAve / --i;
 return 0;
}

[Hiren]

Sorry I hit the TAB to many times