4D Systems 4DCAPE-70T Not displayed.

[나종식]

hi,

I connected the bbb board and the 4dcape-70 display device.

When the bbb board booting, it is not displayed.

I added the following to the file.(uEnv.txt )

-> dtb=am335x-boneblack-4dcape-70t.dtb

There is no file(am335x-boneblack-4dcape-70t.dtb) called dtd in the folder below. Is that the cause?

  -> /boot/dtbs/4.9.20-ti-r27/

Or are there other causes?

My bbb board environment.

-  Kernel : 4.9.20-ti-r27

-  RootfIle : Ubuntu 16.04 LTS

Thank you.

[Robert Nelson]

On Wed, Apr 5, 2017 at 12:50 AM, 나종식 <jong...@gmail.com> wrote:
> hi,
>
> I connected the bbb board and the 4dcape-70 display device.
> When the bbb board booting, it is not displayed.
>
> I added the following to the file.(uEnv.txt )
> -> dtb=am335x-boneblack-4dcape-70t.dtb

don't set that.. (it was only for v3.14.x)

>
> There is no file(am335x-boneblack-4dcape-70t.dtb) called dtd in the folder
> below. Is that the cause?
> -> /boot/dtbs/4.9.20-ti-r27/
>
> Or are there other causes?
>
> My bbb board environment.
> - Kernel : 4.9.20-ti-r27
> - RootfIle : Ubuntu 16.04 LTS

switch to u-boot overlays:

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

and the 4dcape-70t will be auto detected by u-boot

Regards,

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

[Robert Nelson]

On Wed, Apr 5, 2017 at 7:10 PM, 나종식 <jong...@gmail.com> wrote:
> Dear Robert Nelson.
>
> i have upgraded U-Boot Overlays with the following URL.
> -> http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
>
> However, the Ubuntu Linux screen does not appear.
> Only the screen LED is on.
>
> I do not know why.

Please share your /boot/uEnv.txt

[Robert Nelson]

On Wed, Apr 5, 2017 at 7:23 PM, 나종식 <jong...@gmail.com> wrote:
> Dear Rober Nelson.
>
> /boot/uEnv.txt:
> ->
> uname_r=4.9.20-ti-r27
> dtb=am335x-boneblack-overlay.dtb
> Disable: HDMI

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

Use:

/boot/uEnv.txt

uname_r=4.9.20-ti-r27
enable_uboot_overlays=1

and make sure you don't have a /uEnv.txt file

[Robert Nelson]

On Wed, Apr 5, 2017 at 7:40 PM, 나종식 <jong...@gmail.com> wrote:
> Dear Robert Nelson.
>
>
> /uEnv.txt Below is the content
>
> loadaddr=0x82000000
> fdtaddr=0x88000000
> rdaddr=0x88080000
>
> initrd_high=0xffffffff
> fdt_high=0xffffffff
>
> #for single partitions:
> mmcroot=/dev/mmcblk0p1
>
> loadximage=load mmc 0:1 ${loadaddr} /boot/vmlinuz-${uname_r}
> loadxfdt=load mmc 0:1 ${fdtaddr} /boot/dtbs/${uname_r}/${fdtfile}
> loadxrd=load mmc 0:1 ${rdaddr} /boot/initrd.img-${uname_r}; setenv rdsize
> ${filesize}
> loaduEnvtxt=load mmc 0:1 ${loadaddr} /boot/uEnv.txt ; env import -t
> ${loadaddr} ${filesize};
> loadall=run loaduEnvtxt; run loadximage; run loadxfdt;
>
> mmcargs=setenv bootargs console=tty0 console=${console} ${optargs}
> ${cape_disable} ${cape_enable} root=${mmcroot} rootfstype=${mmcrootfstype}
> ${cmdline}
>
> uenvcmd=run loadall; run mmcargs; bootz ${loadaddr} - ${fdtaddr};

u-boot overlays need a new u-boot, which you've already installed..
Remove the /uEnv.txt as that is for compatibility with ancient
versions of u-boot