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Index › Programming Questions & Help › Syntax Questions › save a digital state that changes often
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save a digital state that changes often (Read 367 times)
valquire
save a digital state that changes often
May 28th, 2009, 6:32am  
hi there,

unfortunately i didn't find an answer to my question yet. maybe you could help..

i have a motion detection sensor with a digital out that states "1" for "no movement" and "0" for "there's movement".

when there's movement the sensor outputs "0" 2 short times, then goes back to "1".

i wish to show a video if there's movement, so i need to measure the 0-trigger - for that i have to record the state as long as the duration of the video.

that's my problem. dunno how to do that.

hope you can guide me on path, i'm stuck in the forest.
thanks in advance,
chris
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blindfish
Re: save a digital state that changes often
Reply #1 - May 28th, 2009, 9:00am  
I'm not sure I follow.  Why do you need to record the state as long as the duration of the video?  Presumably to stop a new trigger event starting it from the beginning?  If so then you'd do better to track the current state of the video (i.e. playing/not playing) and test against that when a trigger event occurs...  If it's already playing do nothing, otherwise play it.
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Where is the what if the what is in why?
 
blindfish
Re: save a digital state that changes often
Reply #2 - May 28th, 2009, 9:04am  
Just saw this  

Any reason you needed to post this question twice

Huh
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Where is the what if the what is in why?
 
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