Is an event structure right?

[ccurtis]

Hi,

   Is the event structure right for what I want to do?

   I have three buttons. When I click Button # 1 this will start a seconds counter (runs until Button # 3 is clicked) Button # 2 will put the current time in an indicator. Then button three is clicked to stop the seconds timer I started with Button # 1 (Button # 1 will have a timeout so it doesn't run forever. Around 1  - 5 minutes Max). So I need to know if a user event structure is going to work for this or is one of the other Labview structures more appropriate for this problem?

   If the event structure would work (I am thinking this would be a better approach for CPU management on an older 933MHz machine). If I am mistaken please let me know. Also if it (event structure) is usable a piece of code demonstrating how I would get it to work would be greatly appreciated.

Many thanks in advance!

Charlie

[mikeporter]

Sounds like an event structure would be perfect. An event for each button, and a timeout event to service the timer--and you're done.

Mike...

[Havarti]

Here is some code that does what i think you need

[ccurtis]

Thanks for the reply.

Charlie

[ccurtis]

Hey BrianPack,

   This is close however, I need the timer in a loop (I am going to show seconds counter i.e. 1,2,3,4,5,6... etc.) and I need to have it rund until timeout or stop is clicked? If you could help me expand your code to accomodate that functionality it would really help.

Many thanks,

Charlie

[Havarti]

Charlie,

So you want the timer to keep running and updating until timeout or button push?

Brian

[ccurtis]

Brian,

Exactly right....

Charlie

[Havarti]

I assumed you don't need button number 2 that you described then if the indicator is free-running.  Does this look about right?

Brian

[Havarti]

Charlie,

Also, you may want to add a little wait (like 50 milliseconds) in the while loop inside case 1 to reduce cpu utilization if it is using to much cpu cycles.

Brian

[ccurtis]

Actually I will be using the second button, because when I click it I want the time stamp put in a seperate indicator, but this is very close and I appreciate your help!

Thanks Very Much,

Charlie

P.S. I will add the 50ms to the while loop. Thanks!