On 18/05/07, Renato Golin <[email protected]> wrote:
Problem is, on joydev_connect, when defining the corrections for every
axis, the joystick is reporting dev->absmax = 127 and dev->absmin =
-127 for both axis 0 and 1, so the correction is based on a signed
range when the joystick is actually sending an unsigned range.
Quick fix so I can play flightgear:
on joydev_connect, created absmin and absmax to avoid messing dev
variables (pointer)
if current position (dev->abs) is not in range:
if (dev->abs[j] > dev->absmax[j] || dev->abs[j] < dev->absmin[j]) {
absmin = 0;
absmax = dev->abs[j] * 2;
}
problems:
- it only works when joy is centred at connection
- it assumes the joy will report correct positions (instead of uncalibrated)
Now I'll figure out how to turn off button 12...
cheers,
--renato
Reclaim your digital rights, eliminate DRM, learn more at
http://www.defectivebydesign.org/what_is_drm
--- joydev.c 2007-04-12 18:15:56.000000000 +0100
+++ /usr/src/linux/drivers/input/joydev.c 2007-05-18 22:21:26.000000000 +0100
@@ -471,6 +471,7 @@
struct joydev *joydev;
struct class_device *cdev;
int i, j, t, minor;
+ int absmin, absmax;
for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
if (minor == JOYDEV_MINORS) {
@@ -520,11 +521,20 @@
joydev->abs[i] = dev->abs[j];
continue;
}
+ /* Some joysticks don't report max/min correctly */
+ if (dev->abs[j] > dev->absmax[j] || dev->abs[j] < dev->absmin[j]) {
+ /* assume joystick is centered */
+ absmin = 0;
+ absmax = dev->abs[j] * 2;
+ } else {
+ absmin = dev->absmin[j];
+ absmax = dev->absmax[j];
+ }
joydev->corr[i].type = JS_CORR_BROKEN;
joydev->corr[i].prec = dev->absfuzz[j];
- joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
- joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
- if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
+ joydev->corr[i].coef[0] = (absmax + absmin) / 2 - dev->absflat[j];
+ joydev->corr[i].coef[1] = (absmax + absmin) / 2 + dev->absflat[j];
+ if (!(t = ((absmax - absmin) / 2 - 2 * dev->absflat[j])))
continue;
joydev->corr[i].coef[2] = (1 << 29) / t;
joydev->corr[i].coef[3] = (1 << 29) / t;
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