6 Replies Latest reply on Sep 5, 2016 11:27 AM by shabaz

    Beaglebone black working with BB-view and emmc disabled

    benq

      Hi,

      I am using BBB C revision and BB-view 4" LCD screen and boot from Micro SD. It works well now.

      I want to disable the emmc to use the pins as GPIO, so I edit the uEnv.txt as following

      -----------------------------------------------------------------------------------------------------------------------------------

      uname_r=4.1.15-ti-rt-r43
      #uuid=
      dtb=am335x-boneblack-bbview-lcd4.dtb

      ##BeagleBone Black/Green dtb's for v4.1.x (BeagleBone White just works..)

      ##BeagleBone Black: HDMI (Audio/Video) disabled:
      #dtb=am335x-boneblack-emmc-overlay.dtb

      ##BeagleBone Black: eMMC disabled:
      dtb=am335x-boneblack-hdmi-overlay.dtb

      ##BeagleBone Black: HDMI Audio/eMMC disabled:
      #dtb=am335x-boneblack-nhdmi-overlay.dtb

      ##BeagleBone Black: HDMI (Audio/Video)/eMMC disabled:
      #dtb=am335x-boneblack-overlay.dtb

      ##BeagleBone Black: wl1835
      #dtb=am335x-boneblack-wl1835mod.dtb

      ##BeagleBone Green: eMMC disabled
      #dtb=am335x-bonegreen-overlay.dtb

      cmdline=coherent_pool=1M quiet cape_universal=enable

      #In the event of edid real failures, uncomment this next line:
      #cmdline=coherent_pool=1M quiet cape_universal=enable video=HDMI-A-1:1024x768@60e

      ##Example v3.8.x
      #cape_disable=capemgr.disable_partno=
      #cape_enable=capemgr.enable_partno=

      ##Example v4.1.x
      #cape_disable=bone_capemgr.disable_partno=
      #cape_enable=bone_capemgr.enable_partno=

      ##Disable HDMI/eMMC (v3.8.x)
      #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G

      ##Disable HDMI (v3.8.x)
      #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

      ##Disable eMMC (v3.8.x)
      #cape_disable=capemgr.disable_partno=BB-BONE-EMMC-2G

      ##Audio Cape (needs HDMI Audio disabled) (v3.8.x)
      #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI
      #cape_enable=capemgr.enable_partno=BB-BONE-AUDI-02


      ##enable Generic eMMC Flasher:
      ##make sure, these tools are installed: dosfstools rsync
      #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

      -----------------------------------------------------------------------------------------------------------------------------------

      after rebooting the beaglebone, the LCD can not light up.

      Is there anyone has similar problem ?

      If anyone can offer useful information will be appreciated.

      Thank you!