I thought it would be useful to allow authors to refer
to pins in whatever nominclature they normally do when
setting the TRIS[A-E] values.
Instead of forcing TRISCbits.TRISC6 = 0;
the author could say: TRISCbits.TX = 0;
This should reduce the number of potential errors by
incorrectly setting up the tri-state registers.
I have only applied this change to the 18f452.h file as
that is the only device I actually have to test
against. I would imagine that this type of change
should be applied uniformly.