Hi, I'm new to these forums and my hardware (NI USB-6351).
Right now I try to generate continuous pulse train or a sinewave by using DAQmx/VisualC++.
I know hot to set/get the frequency while the signal output from digital panel.
(i.e. DAQmxWriteCtrFreqScalar / DAQmxReadCtrFreqScalar)
But I really want to know how to change/check the frequency while the siganl output from analog panel.
Does anyone tell me whitch api commands could do this(or after the channel is created)?
At the following codes, I use continuous pulse train for example...
[CODES:]
for(;i<1000;i++)
{ if(i%2 ==0) data[i] = 10;
else data[i] = -10;
}
DAQmxErrChk (DAQmxCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandle,"Dev1/ao0","",-10.0,10.0, DAQmx_Val_Volts,NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle,"",1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000));
DAQmxErrChk (DAQmxRegisterDoneEvent(taskHandle,0,DoneCallback,NULL));
DAQmxErrChk (DAQmxWriteAnalogF64(taskHandle,1000,0,10.0,DAQmx_Val_GroupByChannel,data,NULL,NULL));
DAQmxErrChk (DAQmxStartTask(taskHandle));
thanks,
Sincere regards~
