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Simon <simon@mungewell.org> I am working on joystick support for the SRW-S1 gaming wheel on Linux, this device has 3 dials with only a few positions each. At present SDL2 only fail to report the highest position value, due to the interger math used for coef[]'s. So with a 4 position switch I have input values (with evtest) -- Event: time 1358967246.173186, type 3 (EV_ABS), code 9 (ABS_GAS), value 2 Event: time 1358967246.173186, -------------- SYN_REPORT ------------ Event: time 1358967246.369150, type 3 (EV_ABS), code 9 (ABS_GAS), value 1 Event: time 1358967246.369150, -------------- SYN_REPORT ------------ Event: time 1358967246.930277, type 3 (EV_ABS), code 9 (ABS_GAS), value 0 Event: time 1358967246.930277, -------------- SYN_REPORT ------------ Event: time 1358967249.369832, type 3 (EV_ABS), code 9 (ABS_GAS), value 1 Event: time 1358967249.369832, -------------- SYN_REPORT ------------ Event: time 1358967249.514382, type 3 (EV_ABS), code 9 (ABS_GAS), value 2 Event: time 1358967249.514382, -------------- SYN_REPORT ------------ Event: time 1358967249.626189, type 3 (EV_ABS), code 9 (ABS_GAS), value 3 Event: time 1358967249.626189, -------------- SYN_REPORT ------------ -- Testjoystick reports -- Joystick has 6 axes, 1 hats, 0 balls, and 17 buttons Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: -32768 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: -32768 -- The attached patch 'shifts' the coef[], so that 1/2 values can be computed/seen and allows testjoystick to report correctly. -- Joystick has 6 axes, 1 hats, 0 balls, and 17 buttons Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: -32768 Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: 32767 -- Cheers, Simon
Simple DirectMedia Layer
(SDL)
Version 2.0
---
http://www.libsdl.org/
This is the Simple DirectMedia Layer, a general API that provides low
level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL,
and 2D framebuffer across multiple platforms.
The current version supports Windows, Windows CE, Mac OS X, Linux, FreeBSD,
NetBSD, OpenBSD, BSD/OS, Solaris, iOS, and Android. The code contains
support for other operating systems but those are not officially supported.
SDL is written in C, but works with C++ natively, and has bindings to
several other languages, including Ada, C#, Eiffel, Erlang, Euphoria,
Go, Guile, Haskell, Java, Lisp, Lua, ML, Objective C, Pascal, Perl, PHP,
Pike, Pliant, Python, Ruby, and Smalltalk.
This library is distributed under the zlib license, which can be found
in the file "COPYING".
The best way to learn how to use SDL is to check out the header files in
the "include" subdirectory and the programs in the "test" subdirectory.
The header files and test programs are well commented and always up to date.
More documentation is available in HTML format in "docs/index.html", and
a documentation wiki is available online at:
http://www.libsdl.org/cgi/docwiki.cgi
The test programs in the "test" subdirectory are in the public domain.
Frequently asked questions are answered online:
http://www.libsdl.org/faq.php
If you need help with the library, or just want to discuss SDL related
issues, you can join the developers mailing list:
http://www.libsdl.org/mailing-list.php
Enjoy!
Sam Lantinga (slouken@libsdl.org)