i made my own cornmeal from sweet corn that were already starting to get dry. I patiently scraped the kernels of the cob and dried the corn kernels for 3 days under the sun. After the span of 3 days I had a finely ground cornmeal, I did it with the help of a blender attachment that is used in making peanut butter.
you can read my food blog @ http://mylifeisfood.blogspot.com I had this cornmeal recipe posted there.