How to generate a single output pulse on 64 different digital out lines (PCI-6513) each with a different start time relative to an event in a main program loop.

Question

Long question.
I am running a main program loop of 60 msec. At one point in the loop I create a 64 element array of delay times. At that point I need to begin outputting a predefined single pulse to each of the 64 lines on my PCI-6513. Each line outputs the pulse with a starting delay set by the "delay time" in the array.
Each delay time is such that the pulses will be done before the next loop commands another one.
Thank You
Roger

Answer 1

Hi,
You have multiple ways of doing this, since there is no timing engine on the 6513 your code is going to control the output of the card, which is what we called “software timed”.  If you take a look at the example called: “Write Dig Chan.vi”, you can individually control each line.
So to change the state of the line; since you have an array of delays time you can aid yourself with “stacked sequence structure” where in each frame you control the time it takes to go to the next frame and the data been written to the card.
Another option is using a state machine where each state write the data you want and you can also control the time between states. For further references take a look at this article Application Design Patterns: State Machines.
I hope it helps
Jaime Hoffiz
National Instruments
Product Expert
Digital Multimeters and LCR Meters