This lets us change things like this...
if (Failed) {
SDL_SetError("We failed");
return -1;
}
...into this...
if (Failed) {
return SDL_SetError("We failed");
}
Fixes Bugzilla #1778.
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
In my system SDL2 is dropping a chunk of joystick events, which result in
a 'stuck brake/accelerator' whilst playing a racing simulator. This
basically means SDL2 is unsuitable for use at this point...
The patch below detects this situation and forces a re-read of all
attached joystick axis - thus resync to the correct/current pedal
positions.
This uses libudev for hotplug, but it's optional, so we'll just try to find
some reasonable defaults without it (maybe an older Linux box or under
FreeBSD's Linux emulation?).
It's been forcibly disabled since 2009, since the kernel apparently splits
these devices for us now, and apparently the code was crashing at the time
(see hg changeset 11c079bb52a8).
Also, it was a ton of messy #ifdefs in this file!
Chusslove Illich 2011-02-13 04:30:28 PST
Currently SDL_JOYSTICK_DEVICE environment variable can be used to add
exactly one topmost device. I think it would be nice if one could also set
several devices (e.g. a stick and a throttle) in this way, as a colon-
separated list. The attached patch implements this
Markus Rathgeb 2011-01-23 14:34:23 PST
With kernel 2.6.31 the struct input_absinfo defined in linux/input.h changed.
A field "__s32 resolution" was added at the end of the struct.
Because the macro EVIOCGABS(abs) is using the struct input_absinfo, it would be
better (IMHO) to change the declaration of variable values to
"int values[sizeof(struct input_absinfo) / sizeof(int)];" or using "struct
input_absinfo" directly.
Ludwig Nussel 2009-10-18 05:34:18 PDT
src/joystick/linux/SDL_sysjoystick.c has some problems:
- test_bit() might break with strict aliasing
- test_bit() assumes array is Uint32 but its actually "unsigned long"
on 64bit systems sizeof(long) != sizeof(Uint32).
- the keybit array is too small
- the arrays are unitialized so the number of
detected buttons is quite random
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404108
It looks like newer kernels do the logical device mapping in the driver,
so this code crashes. I don't have one of these nor do I have remote
access to debug this, so I'm disabling the logical mapping for now.
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403937
Port SDL 1.3 to the Nintendo DS
by Darren Alton, mentored by Sam Lantinga
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403188
Force Feedback for SDL
by Edgar Simo, mentored by Ryan C. Gordon
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403159
Check all joysticks instead of stopping if one has been removed.
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402670
