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Forum Problems with 4.3" LCD and BBB
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  • Replies 6 replies
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  • lcd
  • bb-view
  • bbb
Related

Problems with 4.3" LCD and BBB

Former Member
Former Member over 11 years ago

Hi everybody

 

I´ve got a BBB and an element14 4.3" LCD with BB-View Cape. I`ve read the user manual from element14 and tried serval methods to make booth parts working without succes.

 

I try to describe what i´ve done, maybe somebody knows whats wrong.

 

1.) Updated BBB to latest Angstrom by flashing with micro sd

 

=> Works just fine, no problems

 

2.) Downloaded BB-VIEW Angstrom Image.zip and extract the following files to an USB drive

 

- am335x-boneblack-lcd4.dtb

- am335x-boneblack.dtb

- kernel_modules.tar.gz

- uImage

 

3.) Mount the USB drive to BBB

 

mkdir /media/udisk

mount /dev/sda1 /media/udisk

 

4.) Copy Files to BBB and extract kernel_modules

 

cp -f /media/udisk/uImage /boot/

cp -f /media/udisk/*.dtb /boot/

tar -xvf /media/udisk/kernel_modules.tar.gz -C /

sync

 

=> restart BBB, by now no problems

 

5.) Boot BBB and open a Putty session

 

root@beaglebone:~# cd /boot

root@beaglebone:~# cp am335x-boneblack-lcd4.dtb am335x-boneblack.dtb

root@beaglebone:~# sync

 

6.) Shutdown BBB and connected BB-VIEW and LCD with BBB

 

7.) Restart

 

Referring to the user manual the LCD should work now, but nothing happens.

 

The BBB boots without problems and the red and green leds on the BB-VIEW board are active, but the LCD stays dark, no backlight - nothing.

 

I don´t know whats worng. Hope somebody can help me.

 

Greetings dx-nine

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  • element14jamie
    element14jamie over 11 years ago

    Hello dx-nine,

    Welcome to the element14 Community, we hope you enjoy it. I will move this to the Beagle Bone Area area as it is a better fit to your question.

     

    Thank you,

     

    Jamie

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  • kohb
    kohb over 11 years ago

    If any of you have solved this problem, please help. I would expect to see the calibration screen, but nothing happens (just nothing).

     

    After no success with Angstrom (as detailed in the post above), I tried Debian, to no success as well. So is there any step that is necessary but not listed in the user manual?

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  • kohb
    kohb over 11 years ago

    image

    Well, the LCD panel displayed nothing because of quite a stupid mistake that I made. The FPC cable was connected the wrong way up on the BB View. The correct connection is shown in the picture.

     

    I connected it wrongly because I was (embarrassingly) not familiar with FPC cable. Also, the picture in Quick Start Guide is misleading (in my opinion).

     

    Both TI SDK demo image and the Debian image work fine with BB View. If I could recall correctly, the power drawn (with BB View) is still about 0.3A. I can run both images with USB power from my laptop.

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  • Former Member
    Former Member over 11 years ago in reply to kohb

    I have followed all of the steps also except I have the FPC cable correct. Is there a schematic for the 4.3 PCB to check voltage and signals?

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  • Former Member
    Former Member over 11 years ago in reply to kohb

    OMG!  Thanks.  I did the same thing.  I'm compiling kernels and trying everything else and it's just that silly cable.

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  • kidiccurus
    kidiccurus over 11 years ago in reply to kohb

    *FACEPALM* Oh well, we have done this at some point. At least it wasn't damaged, the last time I saw some connecters misconnected like this, the hot end for a 3d printer was destroyed in the process.

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