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Forum Topic - calib-touch difficult to work and not accurate: (3 Items)

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mike scott(deleted)

01/22/2019 7:30 AM

post119431

calib-touch difficult to work and not accurate

Hi QNX,

       qnx sdp 6.6, qnx sdk for apps and media 1.1 release, 
       BSP_ti-am335x-beaglebone_br-660_be-660_SVN797070_JBN574.zip
       beaglebonedemo.ext.anm11.258.150325_2017
       touchscreen 800x480

I am working on touchscreen with beaglebone black on qnx 6.6.

Touchscreen starts with calib-touch 3-point calibration. However it stuck at the last step as described in Figure 4, 
http://www.qnx.com/developers/docs/6.6.0_anm11_wf10/#com.qnx.doc.neutrino.utilities/topic/c/calib-touch.html
exactly same situation as previous post, "calib-touch program doesn't accept or recognize that."
http://community.qnx.com/sf/discussion/do/listPosts/projects.graphics/discussion.advanced_graphics.topc25633

After many times tries, calib-touch finally "accept" and save the data to calib.localhost. However, the calibration is 
not accurately at all. You have to estimate and try to figure out exact location, for example, in QT keyboard demo 
program from beaglebonedemo, push "2" maybe come out "8", very frustrating.

Please advise, thanks in advance

Mike

mike scott(deleted)

01/22/2019 8:35 AM

post119434

Re: calib-touch difficult to work and not accurate

another issue,

after the first unsuccessful "accept"ed calibration, I tried to do recalibration with 

calib-touch -zorder=20 -config-file=/tmp/calib.localhost -recalibrate

this time stuck at Figure 1 of http://www.qnx.com/developers/docs/6.6.0_anm11_wf10/#com.qnx.doc.neutrino.utilities/topic
/c/calib-touch.html

i.e., the target never moves no matter touch any place on the whole screen.

It seems, the previous calibrated data were still in use, and blocked the recalibration.

Please advise, thanks in advance.

Mike

mike scott(deleted)

01/24/2019 6:01 AM

post119447

Re: calib-touch difficult to work and not accurate

never mind, 

use legacy driver "devi" instead of "hid" solve the problem.

Mike

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