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/* Title: USB Joystick library
Version 0.2
Written by Puck2099 (puck2099@gmail.com), (c) 2006.
<http://www.gp32wip.com>
If you use this library or a part of it, please, let it know.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef USBJOY_H
#define USBJOY_H
/*
Enumeration: Axes values
This enumeration contains shortcuts to the values used on axes.
Constants:
JOYUP - Joystick Up
JOYDOWN - Joystick Down
JOYLEFT - Joystick Left
JOYRIGHT - Joystick Right
See also:
<joy_getaxe>
*/
#define JOYUP (0)
#define JOYDOWN (1)
#define JOYLEFT (2)
#define JOYRIGHT (3)
/*
Struct: usbjoy
Contains all Joystick needed information.
Fields:
fd - File descriptor used.
name - Joystick's name.
device - /dev/input/jsX device.
numbuttons - Joystick's buttons.
numaxes - Joystick's axes.
numhats - Joystick's hats.
statebuttons - Current state of each button.
stateaxes - Current state of each direction.
*/
struct usbjoy {
int fd;
char name [128];
char device [128];
int numbuttons;
int numaxes;
int numhats;
int statebuttons[32];
int stateaxes[4];
};
/*
Function: joy_open
Opens a USB joystick and fills its information.
Parameters:
joynumber - Joystick's identifier (0 reserved for GP2X's builtin Joystick).
Returns:
Filled usbjoy structure.
*/
struct usbjoy * joy_open (int joynumber);
/*
Function: joy_name
Returns Joystick's name.
Parameters:
joy - Selected joystick.
Returns:
Joystick's name or NULL if <usbjoy> struct is empty.
*/
char * joy_name (struct usbjoy * joy);
/*
Function: joy_device
Returns Joystick's device.
Parameters:
joy - Selected joystick.
Returns:
Joystick's device or NULL if <usbjoy> struct is empty.
*/
char * joy_device (struct usbjoy * joy);
/*
Function: joy_buttons
Returns Joystick's buttons number.
Parameters:
joy - Selected joystick.
Returns:
Joystick's buttons or 0 if <usbjoy> struct is empty.
*/
int joy_buttons (struct usbjoy * joy);
/*
Function: joy_axes
Returns Joystick's axes number.
Parameters:
joy - Selected joystick.
Returns:
Joystick's axes or 0 if <usbjoy> struct is empty.
*/
int joy_axes (struct usbjoy * joy);
/*
Function: joy_update
Updates Joystick's internal information (<statebuttons> and <stateaxes> fields).
Parameters:
joy - Selected joystick.
Returns:
0 - No events registered (no need to update).
1 - Events registered (a button or axe has been pushed).
-1 - Error: <usbjoy> struct is empty.
*/
int joy_update (struct usbjoy * joy);
/*
Function: joy_getbutton
Returns Joystick's button information.
Parameters:
button - Button which value you want to know (from 0 to 31).
joy - Selected joystick.
Returns:
0 - Button NOT pushed.
1 - Button pushed.
-1 - Error: <usbjoy> struct is empty.
*/
int joy_getbutton (int button, struct usbjoy * joy);
/*
Function: joy_getaxe
Returns Joystick's axes information.
Parameters:
axe - Axe which value you want to know (see <Axes values>).
joy - Selected joystick.
Returns:
0 - Direction NOT pushed.
1 - Direction pushed.
-1 - Error: <usbjoy> struct is empty.
*/
int joy_getaxe (int axe, struct usbjoy * joy);
/*
Function: joy_close
Closes selected joystick's file descriptor and detroys it's fields.
Parameters:
joy - Selected joystick.
Returns:
0 - Joystick successfully closed.
-1 - Error: <usbjoy> struct is empty.
*/
int joy_close (struct usbjoy * joy);
#endif // USBJOY_H
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