From: JamesAng <ang...@gm...> - 2011-09-21 02:17:15
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Hi Doug, dcraw101 wrote: > > > > JamesAng wrote: >> >> >> BrentP wrote: >>> >>> James: >>> >>> I didn't actually get as far as modifying the driver just yet. I had to >>> put my Gumstix project on the back burner soon after posting this, but I >>> should be getting back to it soon. >>> >>> I can dig up some more details in a bit, but basically, I believe I set >>> "defaultdisplay=dvi" in U-Boot which then uses the generic LCD driver. >>> I then used a combination of "fbset" and echo'ing timings to >>> "/sys/devices/omapdss/display0/timings" >>> >>> According to my notes I did: >>> >>> echo "15000,480/1/15/14,272/1/45/33" > >>> /sys/devices/omapdss/display0/timings >>> >>> I'd have to go back and try that again to make sure that's exactly what >>> did it, but that was the path I was on. >>> >>> I'll try to post something more detailed later, but maybe this can get >>> you going in the right direction. Ultimately, we need to patch the >>> driver as a workaround until the hardware issue is solved. >>> >>> >>> Brent >>> >> >> Hi Brent, >> >> Understood. :) >> But your investigation into the timing issue do help to narrow the search >> for a permanent solution. >> >> I look forward to more details that you can provide so that I can also >> try to solve it at my end over here. >> >> Cheers~! >> >> James. >> >> > > I am trying to connect the Chestnut to a an AUO 5.7" LCD. If I set the > pixel clock to 25 MHz (as per the AUO datasheet) then the touch panel is > very erratic and updates very slowly. if I change the pixel clock down to > 10MHz then the touch panel is much more responsive, but now my LCD is > refreshing too slow. Could this be an electical interferrence or > cross-talk issue? Could it help to lower the speed of the SPI bus > communicating with the ADS7846? > > thanks, > Doug > ATM, I've put this at a lower priority. Have you tried to see if the response between "ts_test"'s draw and that on the GUI is vastly different? For mine without any modification, ts_test give a good response time but sluggish when on the GUI.. But why??.. -- View this message in context: http://old.nabble.com/LCD-touch-screen-unusable-on-Overo-Chestnut-tp30728009p32503706.html Sent from the Gumstix mailing list archive at Nabble.com. |