I am designing a device that will take input from a 10 digit (4 rows 3 columns) and do all the displaying on a LCD. I assume that a lot of people have written drivers to interface with a keypad. I have been trying to create one of my own, but I haven't had much luck. Could someone post where I can find examples of how to implement such a driver? I have had a class dealing with microcontrollers, but it has been a semester. I am using a Philips 87C52.

Thanks