Measuring Angular Position with vc++

[ZainZeus]

I couldn't use AI ContAcqIntClk example because I only have 2 Analog Inputs and are already used, and I'm reading an Encoder, so It wouldn't help me either.

I don't know what you mean about poll the Available Samples property, what's that, where can I find it?

[ZainZeus]

Got it!!

I now have the program doing what I want to, I just deleted Sampling Timming, an voila! It's really boring explaining what i did so i will just post the modifications I did to the Ang_Pos_Buff_Count.c example:

/*********************************************************************

*

* ANSI C Example program:

* AngularPosition-Buff-Cont.c

*

* Example Category:

* CI

*********************************************************************/

#include <stdio.h>

#include <stdlib.h>

//#include <conio.h>

#include <NIDAQmx.h>

#define DAQmxErrChk(functionCall) if( DAQmxFailed(error=(functionCall)) ) goto Error; else

int i;

int main(void)

{

int error=0;

TaskHandle taskHandle=0;

int32 read;

float64 data[10];

char errBuff[2048]={'\0'};

/*********************************************/

// DAQmx Configure Code

/*********************************************/

DAQmxErrChk (DAQmxCreateTask("",&taskHandle));

DAQmxErrChk (DAQmxCreateCIAngEncoderChan(taskHandle,"Dev2/ctr0","",DAQmx_Val_X4,0,0.0,DAQmx_Val_AHighBHigh,DAQmx_Val_Degrees,360,0.0,""));

// ADJUSTED THIS LINE TO MY DEVICE

//DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle,"/Dev2/PFI8",1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000));

// I JUST DELETED (SLASHED) THE LINE ABOVE

/*********************************************/

// DAQmx Start Code

/*********************************************/

DAQmxErrChk (DAQmxStartTask(taskHandle));

printf("Continuously reading. Press Ctrl+C to interrupt\n");

while( 1 ) {

/*********************************************/

// DAQmx Read Code

/*********************************************/

DAQmxErrChk (DAQmxReadCounterF64(taskHandle,1,-1,data,10,&read,0));

// AND CHANGED SOME OF THEESE SETTINGS

printf("Acquired %d samples\n",read);

//for (i=0;i<read;i++)

//{

system("CLS");

printf("%f, ",data[i]);

//}

fflush(stdout);

}

Error:

if( DAQmxFailed(error) )

DAQmxGetExtendedErrorInfo(errBuff,2048);

if( taskHandle!=0 ) {

/*********************************************/

// DAQmx Stop Code

/*********************************************/

DAQmxStopTask(taskHandle);

DAQmxClearTask(taskHandle);

}

if( DAQmxFailed(error) )

printf("DAQmx Error: %s\n",errBuff);

printf("End of program, press Enter key to quit\n");

getchar();

return 0;

}

Pretty simple stuff, but it took me a long time to get here since i didn't know anyting about programming daqmx with vc++, I just want to thank Neil, Arturo, BeCeGa, and many others who have helped me, Thank you guys. Now I will continue working on vc++ windows interface to complete my project, as well as so many other things about daqmx, so I will keep disturbing you guys .

ZZ

[Neil_S.]

I'm glad you got it working.  Don't hesitate to post to the forums again if you get stuck.  We are here to help.

Neil S.