Can I use a function in a concurrent code?

To see an example of "function use on steriods" take a look at the code associated with this tutorial

http://www.ovro.caltech.edu/~dwh/correlator/pdf/lfsr_tutorial.pdf

http://www.ovro.caltech.edu/~dwh/correlator/pdf/lfsr_tutorial_src.zip

and look at

lfsr_tutorial_src\prbs\src\prbs.vhd

The code uses functions to statically initialize what is effectively a matrix operation. The "static" initialization means that the code changes based on generics, but does not change once those generics have defined values.

Cheers,

Dave