Hi all,
I would like to know how to read the entire 32 line AI channels in 6254 card
base on an external clock. In PFI2 & PFI4 lines a clock from 1 kHz to 100 kHz
is passing. On each rising edge of the clock I should read the voltage.
I tried to implement this function with the help of event callback function,
but when I added count on the call back I found it not triggering for all the
events.
The code:
TaskHandle taskHandle;
iStatus=DAQmxCreateTask(_T("RunUptask"),&taskHandle);
iStatus=DAQmxCreateAIVoltageChan(taskHandle,_T("Dev5/ai0:31"),_T("ai0:31"),DAQmx_Val_NRSE,0,10,DAQmx_Val_Volts,NULL);
iStatus=DAQmxCfgSampClkTiming(taskHandle,_T("PFI2,PFI4"),100,DAQmx_Val_Rising,DAQmx_Val_ContSamps,100);
iStatus=DAQmxRegisterSignalEvent(taskHandle,DAQmx_Val_SampleClock,0,RunUpCallback,this);
iStatus=DAQmxStartTask(taskHandle);
For reading the voltage I am using:
DAQmxReadAnalogF64(taskHandle,DAQmx_Val_Auto,DAQmx_Val_WaitInfinitely,
DAQmx_Val_GroupByChannel,RunupReading, 32, &sampsPerChanRead, NULL);
If any body has any idea how to solve this, please share
with me.
Thanks & regards
Renjith.
