i.MX ProcessorsのトピックTouchscreen support on IMX6 Evaluation Kit

Touchscreen support on IMX6 Evaluation Kit

SumitVaidya — Thu, 28 Jun 2012 20:22:38 GMT

Hi,

I bought IMX6 evaluation kit from Freescale. The package has 7" PRGB 800x480 IMX6QSB Development kit (LCD + resistive touch screen).

The LCD display work fine out of box. I need to compile kernel 3.0.15 to add touch screen support.

I tried with TSC2007 and egalax but not able to make it work. I am checking to see touch events under "/dev/input/event0".

Can you point me to some startup documentation?

Thanks.

Regards,

Sumit

Re: Touchscreen support on IMX6 Evaluation Kit

SumitVaidya — Tue, 03 Jul 2012 14:49:13 GMT

Here is the update.

I have a Sabrelite IMX6 Boundary Devices evaluation kit. From the documentation it seems that the touchscreen is from OKAYA Electric. I assume it uses the same eGalax driver.

I configured linux kernel 3.0.15 using LTIB for eGalax touch screen and I can see device getting registered.
"input: eGalax Touch Screen as /devices/platform/imx-i2c.2/i2c-2/2-0004/input/input1"

Here is the output of "cat /proc/bus/input/devices"

I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="gpio-keys"
P: Phys=gpio-keys/input0
S: Sysfs=/devices/platform/gpio-keys/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=40000800 1c0040 0 0 0

I: Bus=0018 Vendor=0eef Product=0020 Version=0001
N: Name="eGalax Touch Screen"
P: Phys=I2C
S: Sysfs=/devices/platform/imx-i2c.2/i2c-2/2-0004/input/input1
U: Uniq=
H: Handlers=mouse0 event1
B: PROP=0
B: EV=b
B: KEY=400 0 0 0 0 0 0 0 0 0 0
B: ABS=2650000 1000003

After that when I execute “cat /dev/input/event1”, I don’t see any events after touching on the screen.

Am I missing something here? How should I test the touchscreen?

Regards,
Sumit

Re: Touchscreen support on IMX6 Evaluation Kit

SumitVaidya — Thu, 12 Jul 2012 12:25:07 GMT

More update.

Finally I was able to make my touchscreen working:). The problem was in I2C bus data and clock pin assignments and handling. I was able to resolve it. Now I have my "TSC2004" device registered and can see touch events on "/dev/input/event1".

Next step is to calibrate touchscreen and I am using tslib from root file system available on Freescale website. This is the log below for errors when I calibrate touchscreen:

Mounting filesystems

mount: mounting usbfs on /proc/bus/usb failed: No such file or directory

Starting the dropbear ssh server:

D-Bus per-session daemon address is: unix:abstract=/tmp/dbus-OW8J6eMDUD,guid=03bc44b0205f032679922e960000000c

gtk: creating gdk-pixbuf.loaders

pango: creating module list

starting pid 2505, tty '': '/etc/rc.d/rc_mxc.S'

_XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6

_XSERVTransOpen: transport open failed for inet6/freescale:0

_XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6

(EE) XKB: Couldn't open rules file /usr/share/X11/xkb/rules/base

(EE) XKB: No components provided for device Virtual core keyboard

unrecognised device identifier!

(EE) config/hal: NewInputDeviceRequest failed (2)

arm-none-linux-gnueabi-gcc (4.4.4_09.06.2010) 4.4.4

root filesystem built on Mon, 27 Feb 2012 14:53:29 -0500

Freescale Semiconductor, Inc.

freescale login: root

BusyBox v1.18.5 () built-in shell (ash)

Enter 'help' for a list of built-in commands.

xres = 800, yres = 480

error: could not support the device

EV_SYN=1 //I wonder in kernel source code it is defined as 0x00

EV_ABS=0 //and this is defined as 0x03. I tried changing it with no luck :(

ABS_MT_POSITION_X=0

ABS_MT_POSITION_Y=0

ABS_MT_TOUCH_MAJOR=0

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <Alt>n=next

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <Alt>p=prev

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <Alt>c=close

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <Alt>d=desktop

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <Alt>m=!matchbox-remote -mbmenu

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <ctrl><alt>x=!xterm

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <ctrl><alt>r=!rxvt

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <ctrl><alt>e=!!gpe-calender

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <alt>Tab=next

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <alt><shift>Tab=prev

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <alt>space=taskmenu

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <alt>escape=!matchbox-remote -mbmenu

matchbox: keyboard does not appear to have a <alt> key.

matchbox: ignoring key shortcut <alt>f4=close

matchbox: Cant find a keycode for keysym 65480

matchbox: ignoring key shortcut f11=fullscreen

mbmenu: no _MB_THEME set on root window

matchbox-desktop: loading /usr/lib/matchbox/desktop/tasks.so with args ( None )

matchbox-desktop: loading /usr/lib/matchbox/desktop/dotdesktop.so with args ( None )

user_overides is (nil)

mb-desktop-dotdesktop: failed to open /usr/local/share/applications

mb-desktop-dotdesktop: failed to open //.applications

mb-applet-menu-launcher: bonobo-browser.desktop has no icon, png or name

mb-applet-menu-launcher: failed to open /usr/local/share/applications

mb-applet-menu-launcher: failed to open //.applications

mb-applet-menu-launcher: bonobo-browser.desktop has no icon, png or name

mb-applet-menu-launcher: failed to open /usr/local/share/applications

mb-applet-menu-launcher: failed to open //.applications