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Date: Fri, 05 Mar 2004 16:08:01 +0000

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From: Alan Swanson
Subject: Re: [SDL] Fatal signal when initiaize with USB joystick on 2.6.2 kern

On Fri, 2004-03-05 at 15:09, Sam Lantinga wrote:
> > Fred, how does the attached patch work for you? Do all your axes work?
>
> I think you meant the two lines to be reversed.
> I checked a more robust version of this into CVS.  Fred, can you see if
> it works?

You've misread the code. :-/

For coef[0] and coef[1], it is (values[2]+values[1]) / 2 and then add
or subtract values[4] to the answer.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40873
This commit is contained in:
Sam Lantinga 2004-03-06 02:58:06 +00:00
parent ea8c53b7fe
commit 561b81add3
1 changed files with 6 additions and 8 deletions
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14
src/joystick/linux/SDL_sysjoystick.c
View File

@ -436,17 +436,15 @@ static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd)
joystick->hwdata->abs_correct[i].used = 0;
} else {
joystick->hwdata->abs_correct[i].used = 1;
t = (2 - values[4]);
if ( t != 0 ) {
joystick->hwdata->abs_correct[i].coef[0] = (values[2] + values[1]) / t;
}
t = (2 + values[4]);
if ( t != 0 ) {
joystick->hwdata->abs_correct[i].coef[1] = (values[2] + values[1]) / t;
}
joystick->hwdata->abs_correct[i].coef[0] =
(values[2] + values[1]) / 2 - values[4];
joystick->hwdata->abs_correct[i].coef[1] =
(values[2] + values[1]) / 2 + values[4];
t = ((values[2] - values[1]) / 2 - 2 * values[4]);
if ( t != 0 ) {
joystick->hwdata->abs_correct[i].coef[2] = (1 << 29) / t;
} else {
joystick->hwdata->abs_correct[i].coef[2] = 0;
}
}
++joystick->naxes;