Joy2key

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Revision as of 17:04, 23 September 2011 by Thestinger (Talk | contribs) (recat)

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Use a joystick/gamepad to control applications which accept keyboard commands


I use joy2key to work around issues with the Logitech Cordless RumblePad 2 "hat" (a.k.a. d-pad) in XBMC.


XBMC 10.0 or probably a recent Arch update (SDL?) broke the joystick hat functionality for me. On XBMC startup, xbmc.log shows 0 hats and 6 - instead of 4 - axes:

17:00:36 T:3020363648 M:1703337984  NOTICE: Enabled Joystick: Logitech Logitech Cordless RumblePad 2
17:00:36 T:3020363648 M:1703337984  NOTICE: Details: Total Axis: 6 Total Hats: 0 Total Buttons: 12


My solution was to install joy2key from AUR. Here's my config which could potentially save you hours of frustration or fun, depending on how you look at it:

#
# ~/.joy2keyrc
#

COMMON
-dev /dev/input/js0
-thresh -16383 16383 -16383 16383 -16383 16383 -16383 16383 -16383 16383 -16383 16383
#-autorepeat 5
#-deadzone 50

START xbmc
-X
# -axis <axis0min> <axis0max> <axis1min> <axis1max> ...
#       0 = left analog stick X-axis
#       1 = left analog stick Y-axis
#       2 = right analog stick X-axis
#       3 = right analog stick Y-axis
#       4 = hat (d-pad) X-axis
#       5 = hat (d-pad) Y-axis
#
# actions: Left/Right/Up/Down (arrow keys) - first letter capital!
#          plus/minus (ASCII characters) - lower case!
#          blank = special
# more info in /usr/include/X11/keysymdef.h
#
# .....0..........1.......2..........3..........4..........5......
#-axis Left Right Up Down minus plus plus minus Left Right Up Down
-axis blank blank blank blank blank blank blank blank Left Right Up Down

# EoF


joy2key needs to start after XBMC to be able to see its window. Here's my XBMC standalone system config:

#
# ~/.xinitrc
#

# Enable Ctrl+Alt+Bksp.
setxkbmap -option terminate:ctrl_alt_bksp &

# Start joy2key after XBMC has been detected running. (Function takes arguments, some optional.)
start_joy2key()
{
  for n in $(seq $4 || seq 5)
  do
    xwininfo -display :0 -name "$1" >/dev/null 2>&1 && joy2key "$1" -config "$2"
    sleep $3 || sleep 3
  done
}
# syntax: start_joy2key <window name> <config file> [wait # of sec between tries] [repeat # of times]
start_joy2key "XBMC Media Center" xbmc 3 5 &

# Start XBMC.
ck-launch-session xbmc-standalone

# EoF


And here is my joy2key config section for controlling Boxee-source:

START boxee
-X
-axis blank blank Page_Up Page_Down blank blank plus minus Left Right Up Down
# .......1.2......3......4.5....6.....7...........8............9.0.1.2
-buttons v Return Escape c Left Right bracketleft bracketright i z s h


Add this to ~/.xinitrc below the XBMC section to alternate between launching XBMC and Boxee:

start_joy2key Boxee boxee 3 3 &
ck-launch-session /opt/boxee/run-boxee-desktop


This gets respawned over and over from /etc/inittab:

x:5:respawn:/bin/su xbmc -l -c "/bin/bash --login -c /usr/bin/startx >/dev/null 2>&1"


References to the sources where I learned about this:

  • [1] blog entry: Joystick Hat in X-Plane in Linux
  • [2] Ubuntu forum post: How to use joy2key for SIXAXIS joypad (or any really!)
  • [3] XBMC wiki: Installing XBMC for Linux > Autostarting XBMC