Hi, I've never done any programming before, but trying to learn a little. I have a Sharp IR sensor, and I'm trying to write a piece of code that takes a measurement, and if the distance is below 30, it turns on a LED. I did this successfully. Then I tried to modify the code by using a subroutine t…

need help with subroutine

system March 14, 2012, 10:12am 9

I agree with that in principle, but his ISR has to be able to get the most recent distance variable, it doesn't have time to calculate it on the spot. Hence the global variable.

Huh? What ISR?

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need help with subroutine

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