handling events in a while loop

[lifetester]

In a while loop, I need to stop the loop after a change of state from false to true or true to false or I can do this by detecting a certain string from the serial port. Seems like I should be able to do this simply by using a counter which is edge triggered. Please Help.

[Ben]

I would love to help but you have provided very little for me to go on.

RE: your boolean, if you recall the previous state and compare to the current using an exclusive OR operation, It should return a true when the previous and current values are different.

On the string thing, you could compare the read string with a constant and get a true when they match.

The above are simply lame ideas that may be of use. If you could go into greater detail, I may be of greater assistance.

Ben

[lifetester]

Hi Ben,

What I ended up doing is what you suggested. I read the string prior to the while loop to get an initial value which I then compared to the current value.

Thanks,
Lou

[Ben]

Cool!