int DIR
(int expression ) ;
DIR (expression) can be used to read the direction
of the up to 32 configurable Port 0 pins. If DIR (expression) is
1 then the corresponding pin is an output. If the value is 0 then that pin
is an input.
With the SuperPRO and PROplus, NXP has added more configurable port pins. We are adopting their convention for control of those pins. FIO0DIR, FIO1DIR, FIO2DIR, and FIO4DIR control the input/output status. Writing 1 to a bit will make it an output. More details in the NXP user manuals.