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It acually is used in FIRST. If you look through the default code, you'll see "Toggle 7." This is what makes the Basic Run light blink so fast.
About the only thing we could use it for would be reversing one of the LED outputs, as those are the only things connected directly to I/O pins. Anyway, if you do find a use for it, the syntax is just
Toggle X
where X is the pin you want to change. For FIRST, this can only be 7-15, with 7 being the basic run light and 8-15 being the LED outputs that are visible on the OI.
Also, as long as you're asking valid questions, nobody is going to mind you posting a lot. Asking questions is good--it helps you learn and it helps other people who visit this site sometime later.
--Rob
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