BBB and Chipsee 7" Cap Touch

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Tony Pitman

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Jun 20, 2019, 10:33:04 AM6/20/19
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I am trying to get the chipsee 7" cap touch lcd to work on my beaglebone black. The board is a rev A5C.

I added the dtb entry to uEnv.txt and did the command line to update x. Not sure that second was needed because x isn't supported, but did it anyway.

The screen now turns on during boot, but nothing ever shows up.

I don't need a GUI I just need a frame buffer. I tried doing the cat /dev/urandom > /dev/fb0 and it first said no more room on the device. Then each time I did it after that it just spewed random stuff to the console.

I rebooted and now it just always says: cat: write error: No space left on device. I assume that is because fb0 isn't really connected to anything.

I am running the latest stretch 9.5 image from here:


Specifically I am running this one: Debian 9.5 2018-10-07 4GB SD LXQT 

Can someone tell me how to get frame buffer to work on this setup?

say...@gmail.com

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May 17, 2020, 12:15:42 PM5/17/20
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Did you try on the latest images https://beagleboard.org/latest-images

say...@gmail.com

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May 17, 2020, 12:15:43 PM5/17/20
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Having the same problem with the latest image (Debian 10.3) Any ideas?



On Thursday, 20 June 2019 22:33:04 UTC+8, Tony Pitman wrote:

Robert Nelson

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May 17, 2020, 12:22:39 PM5/17/20
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On Sun, May 17, 2020 at 11:15 AM <say...@gmail.com> wrote:
>
> Having the same problem with the latest image (Debian 10.3) Any ideas?

Sorry, the old directions where:

dtb=am335x-boneblack-bbb-exp-c.dtb on the /boot/uEnv.txt

With the conversion to using v4.19.x this will not work today..

I need to go looking for my old Chipsee cape..

In the meantime, downgrade to v4.14.x-ti by running:

sudo /opt/scripts/tools/update_kernel.sh --ti-channel --lts-4_14

Tracking via: https://github.com/beagleboard/Latest-Images/issues/43

Regards,

--
Robert Nelson
https://rcn-ee.com/
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