Hi Deere,
Check this post, we already discussed the same.
http://scn.sap.com/thread/3528968
Step 1 : Create a calculation view in script mode.
Step 2 : Create your output structure(as same as the procedure output structure)
Step 3 : Call the procedure inside the script .
Step 4: Map the fields to the output variable.
Step 5: Map the input variables to the procedure input(if needed)
Exposing :
Step 5 : In the xsodata file, you can consume as usual .
Sreehari