Beagle Board and Innolux TFT LCD: 7.0", 800x480 (Innolux AT070TN92)

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1

hi

I have bought et beagle board rev C4, not Xm, and this touch screen ;

http://cgi.ebay.com/7-TFT-LCD-Frame-Touch-TI-Cortex-A8-BeagleBoard-/120733208811?pt=LH_DefaultDomain_0&hash=item1c1c4290eb

But, I have a problem with the display.
Seems like the resolution is not good. I need 800x480 but I don't know
where I can change it.
Also, I am running Android and the picture is not stable like a bad
transmition.

Do you know How to fix it ?
Thanks in advance.

2

I suggest you ask the person that sold it to you. I have never seen this product before. It shows it plugged into a BeagleBoard-xM and not a BeagleBoard C4. I can only assume that it either has never been tested on a rev C4 or it does not work. In theory it should work, but again you need to contact the person that sold it to you.

Gerald

3

Every LCD requires correct timings set in the kernel. If software does
not support this display then it does not have to work.

4

maybe you need to modify the drivers/video/modedb.c of kernel to add
800x480 resolution.

5

Thank you, I will try that

6

Interesting, I have not seen such a solid running
Microsoft Windows on any BeagleBoards.

Don

7

Hi, I added a line in drivers/video/modedb.c lije you said, but no
result.
I am stumped because, I use the exact same .config from a kernel
précompiled which works fine, with the good resolution. But with my
own kernel that I compiled myself, the resolution is not good.
Do you have any others ideas hopefully ?
thanks again

8

Sorry, I forget to mention, I add this line :

{
       /* 800x480 @ 60 Hz, AT070TN83 LCD */
       NULL, 60, 800, 480, KHZ2PICOS(3000), 40, 40, 13, 29, 48, 3,
       0, FB_VMODE_NONINTERLACED
    },

9

You must change display to dvi in bootscr, not lcd by default.
I think this screen get output from dvi.
Here's my boot configure:
setenv bootargs 'console=ttyS0,115200n8 androidboot.console=ttyS0
mem=256M root=/dev/mmcblk0p2 rw rootfstype=ext3 rootdelay=1 init=/init
ip=off omap_vout.vid1_static_vrfb_alloc=y vram=8M omapfb.vram=0:8M
omapdss.def_disp=dvi omapfb.mode=dvi:800x480MR-16@60'

Good luck.
PS: have you get touchscreen worked ?

10

Hi,

Had your display issue been sorted out yet? You can logon our technical forum www.esky-sh.com/bbs for further help if in need.

Regards