DAQmx Base Synchronized Finite Analog Input Continuous Analog Output

This example demonstrates how to synchronize a finite analog input with continuous analog output on a single card using DAQmx Base. This is done exporting the analog output start trigger to a RTSI line that the analog input has been set to trigger off of.

Setup:
Set up the physical channel information for analog input and output. If timing parameters are changed, make sure to change the number of times the for-loop iterates for the analog input appropriately. Make sure the trigger line is set to the RTSI6 terminal of the DAQ card. Set the output waveform to desired settings.

Operation:
1. Create analog output channel
2. Define timing parameters of the analog output task, such as sampling rate
3. Export the analog output trigger to a RTSI line on the board, this is so that the
analog input can start synchronously
4. Create the waveform to output
5. Write the waveform to the AO FIFO of the DAQ card
6. Create analog input channel
7. Define the timing parameters for the analog input task
8. Set analog input task to trigger off of analog output task via a RTSI line
9. Start the analog task to wait for the AO trigger to begin acquisition
10. Merge errors
11. Begin analog output, due to the triggering that was set up, analog
input will begin at this time as well
12. Read defined number of samples out of the analog input buffer
13. Continue to output waveform till user stops program
14. Stop and Clear analog output task
15. Stop and Clear analog input task
16. Error handling

Requirements

Filename: daqmxbase_triggersync_ai_ao.zip

Software Requirements

Application Software: LabVIEW Base Development System 8.0
Language(s): LabVIEW

Hardware Requirements

Driver: NI-DAQmx Base 2.0

Reader Comments | Submit a comment »

How can I do the same thing in DAQmx Base with continuous AI instead of finite?
- Anant Agrawal, Food and Drug Administration. anant.agrawal@fda.hhs.gov - Mar 8, 2009