Egydarceyes

Hello guys,
I'm looking for someone who could help me with a touch pad add-on code for my project. We're using the HCS12 chip and this project is a continuous of the one before it which is basically a counter that reads special characters from the keyboard and does a specific function.

For example:
the "." to stop counting.
the "+" to start counting.
and so on and so forth with the rest of the asked characters.

We have to add-on the touch pad to work as an extra input from the user along with the keyboard and I have no idea how I should go about doing this.

Any help would be much appreciated and comments as well.
Thanks.