how to rewrite different data using pci-6723

[krishna_ak]

Hi,

I am  able to generate 24 analog ouputs with different data simultaneously but I am not able to generate updated data for all channels .

for example

AS I am using my functions like below :-

The sequence I am using is like this :-

1.DAQmxCreateTask("",taskHandle);

2.DAQmxCreateAOVoltageChan(*taskHandle,chan,"",min,max,DAQmx_Val_Volts,NULL);

3.DAQmxCfgSampClkTiming(*taskHandle,"",rate,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000);

5.DAQmxWriteAnalogF64(taskHandle,bufferSize,0,10.0,DAQmx_Val_GroupByChannel,data,&written,NULL);

6.DAQmxStartTask(taskHandle);

7.DAQmxIsTaskDone(taskHandle,done);

8.DAQmxStopTask(taskHandle); 

9.DAQmxClearTask(taskHandle); 

In first time  I am able to generate data for all channels using sampling method but for the second time I am not able to update tthe new data in DAQmxWriteAnalogF64 with out stoping the task if i do it will not write anything for second time.

please do the help

Asap

Regards

krishna

[Tom_W_[DE]]

Hi Krishna-

Because you are configuring your generation for "DAQmx_Val_ContSamps" you should actually be calling the DAQmxIsTaskDone in a loop to periodically check for task status.  Within this loop you should also be able to periodically write new data to the task.  I'm assuming you are using CVI- I have attached an example that shows how to update the analog output data "on the fly" while your application is running.  Please take a look and let me know if you have any additional questions.

Thanks-