> You'll probably want to put all the includes at the bottom of the
> interrupt routine after a return, but before the '}' so that you don't
> start by executing the first included file.

Be careful here. You are inferring a mix of program flow that is both
inside and outside of the "#include". You should either have controlling
statements (if, switch, etc) in main.c _or_ as part of "my serial code",
but not a mixture.

It's one of those techniques like "$+x", that is great in the right place but
is easy to make into a mess.

Steve.

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