tslib on OMAP3

Does anyone have tslib running well on an OMAP3?

I have a LogicPD Zoom LPD3430 thing and a TI OMAP3430 SDP dev board, and both have similar issues. The touchscreen is on /dev/input/event1 and works, but is so inaccurate, it's almost unusable. After running ts_calibrate I'm testing with ts_test. If I press and hold with ts_test in draw mode, I can see just how inaccurate it is... After a few seconds I get a white blob about 1/3 of the screen width in diameter.

Has anyone got this to work correctly? If so, what tslib plugins/modules are you using and with which parameters? I've tried various combinations and found some to give a slight improvement and others make it a lot worse.

Cheers,

Tom

Hi Tom

Try the new kernel image from omapzoom website fro ldp

http://www.omapzoom.org/pub/kernel/linux-ldp-v1.4.tar.bz2

The environment variables:

export TSLIB_TSDEVICE=/dev/input/event1
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/lib/ts

then execute ts_calibrate and ts_test

Regards
Abraham

Hi Tom,

The tslib is contained OMAP35x package released from Texas Instruments. It is functional. This package is based on 2.6.22-18.

What is the kernel version you are using?
Are you may want to look to update the touchscreen driver (drivers/input/touchscreen/ads7846.c).

Best regards,
Sanjeev

---------- Forwarded message ----------
From: Tom Cooksey <[email protected]>
Date: Wed, Jun 25, 2008 at 10:03 PM
Subject: tslib on OMAP3
To: [email protected]

Does anyone have tslib running well on an OMAP3?

I have a LogicPD Zoom LPD3430 thing and a TI OMAP3430 SDP dev board, and both have similar issues. The touchscreen is on /dev/input/event1 and works, but is so inaccurate, it's almost unusable. After running ts_calibrate I'm testing with ts_test. If I press and hold with ts_test in draw mode, I can see just how inaccurate it is... After a few seconds I get a white blob about 1/3 of the screen width in diameter.

Has anyone got this to work correctly? If so, what tslib plugins/modules are you using and with which parameters? I've tried various combinations and found some to give a slight improvement and others make it a lot worse.

Cheers,

Tom
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I'm using a binary blob kernel, directly from TI. I can't change kernel as I'm using the PowerVR SGX drivers, which I don't have the source for. :-(

I'l ask TI for an updated kernel, if you believe this to be the problem. I was assuming it was a tslib module/configuration problem.

Cheers,

Tom