User`s manual

ROBOT . HEAD to TOE

Product User’s Manual – SKPS

For Type 1, there are 2 variables for each joystick which is axis X and axis Y. For example

user can move the joystick up, down for Y axis and left, right for X axis. For Y axis, when

users move the joystick up, the value will change from 128 to 0; when user move the joystick

down, the value will change from 128 to 255. For X axis, when users move the joystick right,

the value will change form 128 to 255; when user move the joystick left, the value will

change from 128 to 0. This axis is same for left joystick and right joystick on PS2 controller.

(a) Type 1

Let’s take an example on left joystick. Referring to the figure below, the left joystick is

moved a bit to the left and a bit to the up direction. So, the value of joy_lx and joy_ly will

changed, as in the figure joy_lx=70 and joy_ly=92.

joy_lx joy_rx

joy_ly joy_ry