The only function in rfch.c returns the parameter for
a given time.
It does _NOT_ and should _NOT_ make any change to the parameter
itself.
That's left up to the caller because we need to
call that function
several time.
If you want to introduce some call that configure the
channel and
make changes and stuff, put it into another function and make sure
it's
called when required.
then i would suggest to expand the scheduling thing. i will see how
complex that would be...