http://libSDL.org/ -  Simple DirectMedia Layer [SDL] is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer

there is a tcl interface - package require mkLibsdl - and some demo scripts joystick(1-5).tcl to get status
information from the gamepad or joystick.

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[Category Multimedia]