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Date: Wed, 23 Jun 2004 17:05:33 -0400 From: Chris Nelson Subject: [SDL] [Patch] WiseGroup MP-8800 / MP-8866 (PS2 Joystick) In the current cvs version, SDL doesn't handle these Playstation2 controller => USB adapters correctly, in linux. It will always assume that the maximum number of joysticks (2 in the case of the MP-8866, 4 in the case of the 8800) are plugged in. This is bad not only because it allows SDL to exaggerate the number of logical joysticks, but primarily because the joystick axes are mapped incorrectly, all over the place, such that the devices are effectively unusable unless you have the maximum number of joysticks plugged in. My changes to src/joystick/linux/SDL_sysjoystick.c build on another's previous work (which was a special case for this very joystick, actually), and fix both of these problems, as well as making the current code a little more general, to allow for others to more easily drop in code for quirky joysticks such as these. I've tested this code under 2.6.7 as well as 2.4.24... Both work as advertised (provided you load the JOYDEV linux code as a module, otherwise they won't work at all, new code or old, but that's another issue entirely). Though this sounds horribly formal, you have my permission to distribute all of my work on this issue under the LGPL. So there.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 25 Jul 2004 18:31:50 +0000
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_JoystickEventState</TITLE
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><H1
><A
NAME="SDLJOYSTICKEVENTSTATE"
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>SDL_JoystickEventState</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5969"
></A
><H2
>Name</H2
>SDL_JoystickEventState&nbsp;--&nbsp;Enable/disable joystick event polling</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN5972"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN5973"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_JoystickEventState</B
></CODE
>(int state);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5979"
></A
><H2
>Description</H2
><P
>This function is used to enable or disable joystick event processing. With joystick event processing disabled you will have to update joystick states with <A
HREF="sdljoystickupdate.html"
><TT
CLASS="FUNCTION"
>SDL_JoystickUpdate</TT
></A
> and read the joystick information manually. <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is either <TT
CLASS="LITERAL"
>SDL_QUERY</TT
>, <TT
CLASS="LITERAL"
>SDL_ENABLE</TT
> or <TT
CLASS="LITERAL"
>SDL_IGNORE</TT
>.</P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>Joystick event handling is prefered</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5990"
></A
><H2
>Return Value</H2
><P
>If <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is <TT
CLASS="LITERAL"
>SDL_QUERY</TT
> then the current state is returned, otherwise the new processing <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is returned.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5996"
></A
><H2
>See Also</H2
><P
><A
HREF="joystick.html"
>SDL Joystick Functions</A
>,
<A
HREF="sdljoystickupdate.html"
><TT
CLASS="FUNCTION"
>SDL_JoystickUpdate</TT
></A
>,
<A
HREF="sdljoyaxisevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_JoyAxisEvent</SPAN
></A
>,
<A
HREF="sdljoyballevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_JoyBallEvent</SPAN
></A
>,
<A
HREF="sdljoybuttonevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_JoyButtonEvent</SPAN
></A
>,
<A
HREF="sdljoyhatevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_JoyHatEvent</SPAN
></A
></P
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