I need to program my MC9S12C microcontroller in assembly language using a 4x4 matrix keypad with a with an 8 pin terminal output. I need the controller to first recognize which key is pushed on the keypad and then display on an led. I am only worried about getting numbers 0-9 to to be displayed. Right now I could use some help getting started with first part, getting the microcontroller to recognize which key is pushed.
Here is the keypad I am using:
http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/matrixkeypad.pdf
Here is the keypad I am using:
http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/matrixkeypad.pdf