Hello!!!!
I want do the same thing...
I think you must use the comparator function from the pic...
I want control the movement of camera by Radio frequncy, and i was searching in the internet and the comparator function is the best way i think....
if someone has a better way i appriciate that...
The PS2 controller uses SPI serial communication that you can find on 16F877A,plius an extra signal (ACK) that you can easily generate.
In this link you'll find many info.
I dont have the intire pad, i remove only the joystick from pcb, nothing more.
that joystick has two potenciometers, and one switch, one potenciometer to left-right, and other for up-down.
Do you have other solution??