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Re: Touch panel driver !!! [message #22325 is a reply to message #22310]

Fri, 03 July 2009 18:15

Didier
Messages: 736
Registered: November 2008
Location: France

Contributor

Hi,

On linux, or any other unix system, a common way to build a project is to use the following steps:
./configure ==> it manages make configuration in order to
enable correct compilation on you're target

make ==> builds the project

make install ==> install the project binaries and other config
files if there are any

In the copy of the source code you made ( step 2 ), you should have a file called 'configure' ==> it is the script that you must launch with ' ./configure '

NB: you will have to update ther makefile in order for it to properly
name you're binary (or you can rename it by hand afterwards)

Configuration:
--------------

On linux all the graphical stuff is usually managed by the X server. It's configuration is written in '/etc/X11/xorg.conf' file.

All the devices used be the server are also configured inside this file and the server loads all the linux modules indicated:
For each device there is a driver module (binary if you prefer), it's name is included in the 'xorg.conf' file and it is therefor automatically loaded by the X server.

Here is an example config file for a Penmount touchpad (I only put the sections where the touchpad is involved):

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Keyboard0" "CoreKeyboard"
	InputDevice    "PenMount" "AlwaysCore"            ==> has to be the same name as the Identifier
EndSection                                                   in section "InputDevice"


Section "InputDevice"
	Identifier	"PenMount"
	Driver		"penmount"                         ==> The module name: - penmount_drv.so
                                                                                - penmount_drv.la
	Option		"Protocol"		"PM9000"
	Option		"Device"		"/dev/ttyS3"
	Option		"PMode"			"1"
	Option		"MinX"			"10"
	Option		"MaxX"			"1000"
	Option		"MinY"			"10"
	Option		"MaxY"			"1000"
	Option		"ADBit"			"10"
	Option		"Baudrate"		"19200"
	Option		"Beep"			"0"		#  0 = no beep, 1 = beep enabled
	Option		"PressVol"		"100"	#  volume of beep (press event)
	Option		"PressPitch"	"880"	#  pitch of beep (press event)
	Option		"PressDur"		"15"	#  length of beep in 10ms (press event)
	Option		"ReleaseVol"	"0"		#  volume of beep (release event)
	Option		"ReleasePitch"	"1200"	#  pitch of beep (release event)
	Option		"ReleaseDur"	"10"	#  len of beep in 10ms (release event)
	Option		"RightButton"	"0"	#  right button active in ms
	Option		"RightButtonStart"	"500"	#  right button active in ms
	Option		"RightButtonEnd"	"900"	#  right button inactive in ms
	Option		"PenDownMode"	"1"	#  0=stream mode, 1=point mode
EndSection

NB: all the code written for the Xorg server is GPL since it works at kernel level
So you're driver will also be GPL.

If it is for a commercial touchpad, publish it. sommebody else might be glad to find it latter.

I hope this will help you.

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