Need help with E14 Beaglebone 4.3 LCD Display

Question

I am having trouble flashing the Beaglebone Black Wireless eMMC with the image file provided for the E14 Beaglebone 4.3 LCD Display.

README - 4.3 LCD Display Cape for Beaglebone Black

4.3 LCD Display Cape for Beaglebone Board (White, Black, or Wireless)

I have followed the instructions for flashing the eMMC but it's not working.

The LED status lights on the BeagleBone Black W blink for a few seconds and go out. The micro SD status light remains on constant after attempt to flash.

I can't figure this out. Beginning to regret the purchase of this Display.

The first one arrived damaged, had to wait for a replacement .

Now on day two of trying to get this display to work with the Beaglebone Black W.

The image will boot from microSD and display will work.

I need to flash the eMMC with this image.

So far unsuccessful

It seems the image is not compatible with the BBB Wireless.

When checking available services with " connmanctl technologies ", ethernet and gadget were listed but not Bluetooth and wifi .

This image seems to be only compatible with the Beaglebone Black and not the Beaglebone Black Wireless .

Is there any one who might be able to assist with finding a solution to this problem?

shabaz · Accepted Answer

Hi Trent, That may be an image issue.. I think I have the same problem on my BeagleBone Blue Black Wireless: ( (Just bare BB-Blue BBB-W, I don't have any cape attached). I'm getting used to super-rapidly pulling out the power after I think the board has powered down : ) I wanted to investigate further to get to the bottom of it, but not had time so far : ( It's only a matter of time before I corrupt the microSD if I keep doing it this way : ( I've not googled yet to see if others have this problem too, or if there was some resolution. It is awesome that you've got the display working though! I didn't realize it was capacitive touch enabled. Looks like a very useful product. (Edit: corrected, I meant to say BBB-W, not BB-Blue. I've not tested BB-Blue).

shabaz · Answer

Hi Trent, Just by coincidence I was trying to put an image on the BBB Wireless a few nights ago. I don't have a display, so in my case I was using the images on the beagleboard website. Out of curiosity just now I checked and it appears to have a 'device tree' fragment file called BB-CAPE-DISP-CT4-00A0.dtbo, and this name appears in one of the comments here: README - 4.3 LCD Display Cape for Beaglebone Black so I'm wondering if you might not need the specific image that is advertised for the cape, and instead the standard image could be used. To activate that device tree fragment, the command line (as root user) will be something like: echo BB-CAPE-DISP-CT4 > /sys/devices/platform/bone_capemgr/slots I don't know if anything more would be needed though. But it could be worth a try. You probably will also need to use that command to disable the HDMI that Aaron mentions above too I guess. Also, incidentally, for the recent images, it would be worth just running from microSD and not eMMC, because they consume nearly the entire eMMC, not leaving much space for applications and updates. I found that out by accidentally filling up and the shell going crazy and having no bytes left to even delete files : ) Also, things have changed for the past few releases, and now when you burn the image onto the SD card, it will no longer be readable on the PC, and it will seem as if the burn operation failed. But it will work. This really caught me out, because it isn't described anywhere that the image format has recently changed. Also some (nearly all) online documentation/blog posts about the device tree mention a path like /sys/devices/bone_capemgr/... but it looks like about a year ago, it changed, to /sys/devices/ platform/ bone_capemgr/.. which isn't great, since it means everyone's documentation is now incorrect : ( I wish they'd kept a link to the old path in the newer images : (

ninjatrent · Answer

The Debian 9.1 2017-08-31 4GB SD LXQT Desktop image available at Beagleboard is confirmed working properly with the Beaglebone LCD Display Cape.

Wi-Fi and Bluetooth are detected.

Chromium Desktop works.

Beaglebone Black Wireless with the LCD Cape.

Everything seems to be in working order.

I would really like to thank everyone for the help.

Trent

alager · Answer

I don't have the wireless version, but I too had issues getting the image to transfer to the eMMC. What I finally found was that the image that has the bbcape43 support has the eMMC disabled. So in /boot/uEnv.txt make sure that the folllowing two lines are NOT commented out: ##BeagleBone Black: HDMI (Audio/Video) disabled: dtb=am335x-boneblack-emmc-overlay.dtb and ##enable Generic eMMC Flasher: cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh The first one enables the eMMC the second one enables the auto copy. The blue LEDs should go into a night rider mode after 20 seconds or so to indicate thtat the copy is in progress. No button presses were required, just insert the SD card then power on. Aaron EDIT: These are the steps in order, just to be clear: 1) boot using the SD image that has bbcape43 support. 2) do the above edits (this will modify the SD card) 3) reboot

ninjatrent · Answer

Other than the issue with powering down the BBB W, everything worked as desired. This display is going on a BBB at later time.

shabaz · Answer

Hi Trent, I'm so sorry, I made a mistake, I meant to say BBB-W, not BB-Blue : ( I've not tested BB-Blue. I'm having the same issue of BBB-W not powering down, as you are. I'll correct the post I wrote, with the wrong text with strikethough.

shabaz · Answer

Hi Aaron, Trent may be able to comment further, but as I understand (and I could be wrong) the full desktop image does reboot when it should shut down, but the smaller IoT image shuts down fine. The full desktop image has the issue only when powered from the 5VDC barrel connector. When powered from the USB connector, it shuts down successfully. The workaround for now is to quickly unplug the barrel connector once all the LEDs have switched off, before it reboots. This is not an LCD cape hardware or software issue, this is an issue in the Linux distribution image as far as I can tell, because I experience it too, and I do not have the LCD cape.

Need help with E14 Beaglebone 4.3 LCD Display

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