Question:

Can serial IO link be supported on C28x devices?

Answer:

Yes.  28x devices are capable of supporting the serial IO Link. There are several industrial sensor / PLC customers using 28x in IO Link systems today, but they have all written their own IO Link SW (as far as we know).

I believe SImma Software could provide IO Link support.

They are quite skilled and affordable for a variety of communication protocols.

http://www.simmasoftware.com/products.html