Change waveform index dynamically

[joehsiao]

I extended the waveform index selection example, and fed the selected waveform into single channel analog output. The analog outputs are triggered by PFI1, which is set to retriggerable. When I start the program, the analog output will be listening, whenever I send a raise signal through PFI1, the selected waveform will be output, and it goes back to listening mode waiting for the next trigger. This works perfectly.

However, between PFI1 signals, I changed the waveform index manually, but the next output waveform is still the same. What I want is whenever a trigger comes in, it would increase the waveform index by one, so when the next trigger comes in, the selected waveform becomes the next one. When reaching the last index, it would loop back to zero.

[EcthelionV · Accepted solution]

You could just add a while loop with an custom index:

Sorry I don't have de DAQmx library but there is an example of what you need.

Kudos and Solved accepted.

Greetings!!!

[joehsiao]

Thanks! I just need to take out the "retriggerable" property and let the loop to handle trigger sequence.