- some notes on SDL

- fixed axis inversion

README

@@ -35,6 +35,19 @@ and start the userspace driver:
 This will create a /dev/input/js0 and allow you to access the gamepad
 from any game. To exit the driver press Ctrl-c  twice
 
+[[ SDL Notes ]]
+---------------
+
+To let SDL know which axis act as a hat and which act as normal axis
+you have to set an environment variable:
+
+ % SDL_LINUX_JOYSTICK="'XBox360 Gamepad (userspace driver)' 6 1 0"
+ % export SDL_LINUX_JOYSTICK
+
+This will let the DPad act as Hat.
+
+See ftp://ptah.lnf.kth.se/pub/misc/sdl-env-vars for more information.
+
 [[ LED Commands ]]
 ------------------
 

TODO

@@ -1,6 +1,7 @@
 * add support to remap keys
 * add support to merge LT and RT into Z-axis
 * allow mouse emulation
+* allow swapping of dpad and analog axis, so that dpad is first instead of last
 * ...
 
 # EOF #

uinput.cpp

@@ -65,7 +65,7 @@ uInput::uInput()
 
       struct uinput_user_dev uinp;
       memset(&uinp,0,sizeof(uinp));
-      strncpy(uinp.name, "XBOx360 Gamepad (userspace driver)", UINPUT_MAX_NAME_SIZE);
+      strncpy(uinp.name, "XBox360 Gamepad (userspace driver)", UINPUT_MAX_NAME_SIZE);
       uinp.id.version = 0;
       uinp.id.bustype = BUS_USB;
       uinp.id.vendor  = 0x045e;
@@ -170,11 +170,11 @@ uInput::send(XBox360Msg& msg)
 
   if (msg.dpad_up)
     {
-      send_axis(ABS_HAT0Y, 1);
+      send_axis(ABS_HAT0Y, -1);
     }
   else if (msg.dpad_down)
     {
-      send_axis(ABS_HAT0Y, -1);
+      send_axis(ABS_HAT0Y, 1);
     }
   else
     {
@@ -183,11 +183,11 @@ uInput::send(XBox360Msg& msg)
 
   if (msg.dpad_left)
     {
-      send_axis(ABS_HAT0X, 1);
+      send_axis(ABS_HAT0X, -1);
     }
   else if (msg.dpad_right)
     {
-      send_axis(ABS_HAT0X, -1);
+      send_axis(ABS_HAT0X, 1);
     }
   else
     {

xbox360.hpp

@@ -19,6 +19,25 @@
 #ifndef HEADER_XBOX360_HPP
 #define HEADER_XBOX360_HPP
 
+enum XBox360Buttons {
+  XBOX360_DPAD_UP    = (1<< 0),
+  XBOX360_DPAD_DOWN  = (1<< 1),
+  XBOX360_DPAD_LEFT  = (1<< 2),
+  XBOX360_DPAD_RIGHT = (1<< 3),
+  XBOX360_START      = (1<< 4),
+  XBOX360_SELECT     = (1<< 5),
+  XBOX360_THUMB_L    = (1<< 6),
+  XBOX360_THUMB_R    = (1<< 7),
+  XBOX360_LB         = (1<< 8),
+  XBOX360_RB         = (1<< 9),
+  XBOX360_MODE       = (1<<10),
+  // unused          = (1<<11),
+  XBOX360_A          = (1<<12),
+  XBOX360_B          = (1<<13),
+  XBOX360_X          = (1<<14),
+  XBOX360_Y          = (1<<15),
+};
+
 struct XBox360Msg
 {
   // --------------------------