XFree86-Touch-Screen-HOWTO Linux Touch Screen HOWTO (c) 2002-2006 by Christoph Baumann, cgb(at)debian.orgv3.4 -- Nov 7, 2006 -- the GNU Free Documentation License applies to this document This document describes how to set up a touch screen input device under XFree86. As the author had only the opportunity to work with devices from EloTouch(R) and MicroTouch(R) this HOWTO is rather specific for these devices. The examples given in this HOWTO concentrate on devices connected via the serial port i.e. Download Archicad For Autocad Users Pdf Free. /dev/ttyS0 or /dev/ttyS1. (Information about USB devices would be appreciated!) • • Touch screen devices are configured in the Xinput section in the XF86Config file (mostly /etc/X11/XF86Config or /etc/XF86Config). At first verify that the device driver modules exist.

They are located in /usr/X11R6/lib/modules/ (the modules for the above mentioned devices are xf86Elo.so and xf86MuTouch.so). Now have a look into XF86Config. There should be a section looking like this: Section 'Files'. ModulePath '/usr/X11R6/lib/modules'. EndSection To get the module loaded by the X server there has to be a section like this: Section 'Module' Load 'xf86Elo.so' EndSection Now the more tricky part. X needs to know some parameters about the device.

The section for this looks like this (see 'man XF86Config' for more details): Section 'Xinput' SubSection 'Elographics' #the entry for a MicroTouch device would be SubSection 'MicrotouchFinger' Port '/dev/ttyS1' # for a device at serial port 2 DeviceName 'TouchScreen' #could be any unambiguous name MinimumXPosition 300 MaximumXPosition 3700 MinimumYPosition 300 MaximumYPosition 3700 UntouchDelay 10 #not supported with MuTouch ReportDelay 10 #not supported with MuTouch AlwaysCore #activates the device on startup EndSubSection EndSection The values for the entries MinimumXPosition etc. Are of course specific for the setup of the hardware (i.e. Depend on the position of the touch screen relative to the monitor). The values determine where the points (0,0) and (xmax,ymax) on your monitor (xmax and ymax depend on the resolution chosen for the Xserver, such as 1024x768) are mapped on the touch screen. The device driver reads these values and interpolishes the other coordinates. For illustration: --------------touch screen area----------------- I I I ########visible monitor area############## I I #x # I I # (0,0) # I I # (MinimumXPosition,MinimumYPosition) # I I # # I I # # I I # # I I # # I I # # I I # # I I # # I I # (MaximumXPosition,MaximumYPosition)# I I # (xmax,ymax)# I I # x# I I ########################################## I I I ------------------------------------------------ This mapping can be done by trial and error or by reading the raw output of the device (needs some serial port programming, see 'The Linux Serial Programming HOWTO').

Linux Touch Screen HOWTO (c). (needs some serial port programming, see 'The Linux Serial Programming HOWTO'). Example XF86Config-4 for an ELO touch screen. Company-specific Linux drivers; Elo. See the Technology notes for each driver on the Driver and File Downloads page to verify support for your touchscreen.