OS: Mac OSX Yosemite 10.10.1
NIDAQ: USB-6008
Driver: NI-DAQmx_Base 14.0.0
Environment: Xcode 6.1.1
I'm trying to get the frequency measurement function to work on my mac, and I'm running into endless problems:
(Note: I've developed the same code on a Windows machine where everything work as expected.)
First of all, I can get only a single example from the "Examples" directory to run, but only using it exactly as it is. If I change anything, it doesn't work. For example,
changing DAQmx_Val_Falling --> DAQmx_Val_Rising I get the error code: -200077: <err>Requested value is not a supported value for this property.
If I change:
DAQmxBaseReadCounterScalarU32 --> DAQmxBaseReadCounterU32 I get the error code: -200428: Value passed to the Task/Channels In control is invalid.
If I copy and paste the example code: (and run with and without the minor modifications shown below)
static int gRunning=0;
void main(int argc, char *argv[])
{
// Task parameters
int32 error = 0;
TaskHandle taskHandle = 0;
char errBuff[2048]={'\0'};
time_t startTime;
// Channel parameters
char chan[] = "Dev1/ctr0";
// Timing parameters
#define bufferSize 100
// Data read parameters
uInt32 data[bufferSize];
int32 samplesToRead = 100;
float64 timeout = 10.0;
int32 read;
DAQmxErrChk (DAQmxBaseCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxBaseCreateCICountEdgesChan(taskHandle,chan,"",DAQmx_Val_RisingFalling,0,DAQmx_Val_CountUp));
//DAQmxErrChk (DAQmxBaseCfgSampClkTiming(taskHandle,clockSource,sampleRate,DAQmx_Val_Falling,DAQmx_Val_ContSamps,samplesPerChan));
DAQmxErrChk (DAQmxBaseStartTask(taskHandle));
gRunning = 1;
// The loop will quit after 10 seconds
startTime = time(NULL);
while( gRunning && time(NULL)<startTime+10 ) {
DAQmxErrChk (DAQmxBaseReadCounterU32(taskHandle,samplesToRead,timeout,data,samplesToRead10,&read,NULL));
printf("Acquired %ld samples\n",read);
}
Error:
if( DAQmxFailed(error) )
DAQmxBaseGetExtendedErrorInfo(errBuff,2048);
if( taskHandle!=0 ) {
DAQmxBaseStopTask(taskHandle);
DAQmxBaseClearTask(taskHandle);
}
if( DAQmxFailed(error) )
printf ("DAQmxBase Error %ld: %s\n", (int long)error, errBuff);
return 0;
}
I get the error code. -200428
Summary:
DAQmx_Val_Falling doesn't work
DAQmxBaseReadCounterU32 doesn't work
Any help would be greatly appreciated.
