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Subject:
Touchscreen & Linux 2.6.24+ kernels
From: Robin Getz ####@####.#### Date: 18 Mar 2008 19:16:49 -0000 Message-Id: <200803181516.32825.rgetz@blackfin.uclinux.org> Hi With Linux, nano-x seems to use a deprecated method for interacting with the touchscreen (it uses the "tsdev" driver, which was marked for removal during the 2.6.21 cycle. http://www.cslimits.net/kernel-2.6.21_docs/feature-removal-schedule.txt Is there any effort underway to move to the userspace tslib library? (which is supported?) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject:
Re: [nanogui] Touchscreen & Linux 2.6.24+ kernels
From: "Greg Haerr" ####@####.#### Date: 25 Mar 2008 20:29:38 -0000 Message-Id: <1b1901c88eb6$ee49dfb0$0300a8c0@RDP> > Is there any effort underway to move to the userspace tslib library? (which is supported?) Robin - It appears few are interested in the userspace tslib issue you've raised. Did you ever try porting this? If you do, I'd be happy to add it to the current CVS. Regards, Greg | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject:
Re: [nanogui] Touchscreen & Linux 2.6.24+ kernels
From: "yi li" ####@####.#### Date: 2 Apr 2008 07:02:16 -0000 Message-Id: <a0e7fce50804020001j546a0b4eya52264cb0fba0d88@mail.gmail.com> Sorry that I intended to send this mail to the list (I'd send the same mail again): Jonathan Kotta made a tslib touchscreen patch for nano-X here: http://download.analog.com/27516/forummessage/4/2/5/4254/microwin.patch (The full thread is here: http://blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&_forum_action=ForumMessageBrowse&thread_id=26343 ). I tested wich nano-X 0.91 and it works. -Yi On Wed, Mar 26, 2008 at 4:29 AM, Greg Haerr ####@####.#### wrote: > > Is there any effort underway to move to the userspace tslib library? > (which is supported?) > > Robin - > > It appears few are interested in the userspace tslib issue you've raised. > Did you ever try porting this? If you do, I'd be happy to add it to the > current CVS. > > Regards, > > Greg > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: ####@####.#### > For additional commands, e-mail: ####@####.#### > > | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject:
Re: [nanogui] Touchscreen & Linux 2.6.24+ kernels
From: "yi li" ####@####.#### Date: 2 Apr 2008 07:04:07 -0000 Message-Id: <a0e7fce50804020003w697ee5b2wdbaa1fd0d01f99dd@mail.gmail.com> Greg, Jonathan mentions " By "slow" I mean there is a lot of latency. The cursor can move fast; the cursor moves straight to anywhere I touch. But there is a noticable delay between touching and cursor movement. If I drag the stylus across the screen, the cursor is a few mm behind. " I saw the same behavior using tslib. Using TSLIB there will be a cursor (I think tslib draws the cursor), while using the old interface, there is not such cursor. So I cannot compare the two. However, one problem using this patch is that, using "top" I saw nano-x using 99% of CPU, So it looks there is some issue with this patch. -Yi On Sat, Mar 29, 2008 at 7:36 AM, Greg Haerr ####@####.#### wrote: > > > > I tested wich nano-X 0.91 and it works. > Jonathan reported some latency between touching the screen and updating > the cursor. Do you have this problem as well? > > Regards, > > Greg > > | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject:
Re: [nanogui] Touchscreen & Linux 2.6.24+ kernels
From: "yi li" ####@####.#### Date: 8 May 2008 08:25:12 -0000 Message-Id: <a0e7fce50805080125h310f0a9ag1f2868ef218f6c25@mail.gmail.com> Luckily the CPU load issue cannot be observed now (It looks like an issue specific to certain board). So I think this patch works well. -Yi On Wed, Apr 2, 2008 at 3:03 PM, yi li ####@####.#### wrote: > > However, one problem using this patch is that, using "top" I saw nano-x > using 99% of CPU, So it looks there is some issue with this patch. > > -Yi > > > > On Sat, Mar 29, 2008 at 7:36 AM, Greg Haerr ####@####.#### wrote: > > > > > > > > I tested wich nano-X 0.91 and it works. > > Jonathan reported some latency between touching the screen and updating > > the cursor. Do you have this problem as well? > > > > Regards, > > > > Greg > > > > > | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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