[OT] Changing the case of filenames

[David Niemi <drn_temp2 rogers com>]

I am running a fortran program which requires all input file names to be
uppercase.  As things were originally done in Windo$e all the filenames
are mixed case (with numbers).

Searching around I came across the "tr" command, but my difficulty comes
in trying to use this from the command line (or even in a bash script).

    mv * | tr [a-z] [A-Z]

Does not work as mv requires a directory for the objective with multiple
files.  All of the scripts that I have seen are mainly for changing the
case of text in a text file so wouldn't work for me.

So, how would I do this?

TIA Dave