One of THE most brilliant things I've ever seen.

#define _TRIS(pin)            pin(_TRIS_F)
#define _TRIS_F(alpha,bit)    (TRIS ## alpha ## bit)
#define _PORT(pin)            pin(_PORT_F)
#define _PORT_F(alpha,bit)    (R ## alpha ## bit)
#define _LAT(pin)            pin(_LAT_F)
#define _LAT_F(alpha,bit)    (LAT ## alpha ## bit)
#define _WPU(pin)            pin(_WPU_F)
#define _WPU_F(alpha,bit)    (WPU ## alpha ## bit)

#define pinSwitch(f)       f(A,2)        //Switch, INPUT , pin RA2
#define pinLed(f)          f(B,5)        //Led, OUTPUT , pin RB5

_TRIS(pinSwitch) =3D 1; //make pin an input
_WPU(pinSwitch) =3D 1; // turn on internal pull-up
_TRIS(pinLed) =3D 0; // make pin an output

while(1){ =20
 _PORT(pinLed) =3D ! _PORT(pinSwitch)
}


Why is it so brilliant? Because now, you can write a standard code library,
without any pin assignment crap in it, and simply include a standard .h fil=
e
(pins.h for example) which you make for each project. In that file, you do
the=20

#define pinSwitch(f)       f(A,2)        //Switch, INPUT , pin RA2

Etc..

....thing and include it into the main project as well. If, at any point, an=
d
for each project, you need to change the pin assignments, you just change
them one place, in that one project, and all the libraries are updated and
working.

And, as far as I can see, it's standard C preprocessor macros. Versions
already exist for AVRs

From:
http://www.starlino.com/port_macro.html

With extensions for HiTech at
http://www.piclist.com/techref/language/ccpp/iomacros-starlino.htm



--
James Newton
1-970-462-7764=20


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