DAQmx conversion

[anarkie]

 Hello? I'm still working on conversion from DAQ to DAQmx.

We have a SCAN_Start function needed to be converted.

Old code is

 //err = SCAN_Start( 1, dbuffer, sampleCount,  0, sampleTicks,     0, GroupTicks    );

New code is

 int32   read=500; //sampleTicks*10;
 float64   data[8000];

 DAQmxErrChk(DAQmxCreateTask("", &SCAN_Handle));
 DAQmxErrChk(DAQmxCreateAIVoltageChan(SCAN_Handle,"Dev1/ai0:3","",DAQmx_Val_Diff,-10.0,10.0,DAQmx_Val_Volts,NULL));
 DAQmxErrChk(DAQmxGetAIGain(SCAN_Handle, "Dev1/ai0:3" /*(const char*)channel*/ , (double*)gain)); //SCAN_Setup
 DAQmxErrChk(DAQmxSetAIConvTimebaseDiv(SCAN_Handle, 500)); //sampleTicks*10
 DAQmxErrChk(DAQmxSetSampClkTimebaseDiv(SCAN_Handle, 2000)); //GroupTicks*10
 DAQmxErrChk(DAQmxCfgDigEdgeStartTrig(SCAN_Handle, "/Dev1/PFI0", DAQmx_Val_Rising ));
 DAQmxErrChk(DAQmxCfgSampClkTiming(SCAN_Handle,"",samplePerChanPerSec,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,sampleCounts)); // Analog channel timing, trigger
 DAQmxErrChk(DAQmxReadAnalogF64(SCAN_Handle,800,10.0,DAQmx_Val_GroupByChannel,data,sampleCounts,&read,NULL));
 DAQmxErrChk(DAQmxStartTask(SCAN_Handle));

But new code returns countless errors saying "The specific resource is reserved. The operation could not be completed as specified. The status code: -50103." 

1. Is this happening due to the sane handler name on different functions?

2. And the conversion is right?

3. I assume that dbuffer of DAQ is data of DAQmx. Is this right?

4. How old DAQ code SCAN_Start returns dbuffer value?

Thanks,

[anarkie · Accepted solution]

Ok, I think I found the problem. The conversion code is right and working fine but somehow it was disabled by 'power off' subroutine in my code. Currently I commented it out and it works fine.

But I still have a quesion about how dbuffer data is returned.

Thanks,