Cant'n login u-boot mode

Discussion in 'Troubleshooting' started by dathuynh148, Feb 24, 2019.

  1. dathuynh148

    dathuynh148 New Member

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    Hello all, I'm new to embedded linux. I read tutorial compile U-boot on https://www.udoo.org/docs-neo/Advanced_Topics/Compile_U-Boot_Bootloader.html. I have some questions:
    • Compiling u-boot on linux compute. Then I run lsblk on my VMware computer, it show sda patrition with sda1 and sda2. The mount directories are /dev/$USER/roots and /dev/$USER/rootfs.
    • What is correct path to run 2 commands
    sudo dd if=SPL of=/dev/*** bs=1K seek=1
    sudo dd if=u-boot.img of=/dev/**** bs=1K seek=69
     
  2. dathuynh148

    dathuynh148 New Member

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    Sorry for lack of information. The full descriptions are here
    I'm new to embedded linux. I read tutorial compile U-boot with Udoo neo board, https://www.udoo.org/docs-neo/Advanced_Topics/Compile_U-Boot_Bootloader.html. I have some questions:

    • Compiling u-boot on linux computer. Then I run lsblk on my VMware computer, it shows sda partition with sda1 and sda2. The mount directories are
    /media/$USER/boot

    /media/$USER/udoobuntu

    • What is correct path to run 2 commands following above link:
    sudo dd if=SPL of=/dev/*** bs=1K seek=1

    sudo dd if=u-boot.img of=/dev/*** bs=1K seek=69

    When I ran follow these commands with path /dev/mmcblk0 and insert SD to my Udoo-neo for booting. It showed 3 seconds and press any keys for exit auto reboot. But I don't know what button I need to press?
     
  3. sirrab

    sirrab UDOOer

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    It says press ANY key.
     
  4. dathuynh148

    dathuynh148 New Member

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    Finally I found my keyboard had issue, not udoo neo :(
     
    waltervl likes this.
  5. Phong

    Phong New Member

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    I don't know if you can help me a little bit.
    I am also trying to do the tutorial on the anchor udoo document to flash the sd card.
    However, I can't see the folder /dev/mmcblk0.
    Is it possible after rebuilding the instructions on udoo document a successfully rebuilding your own udooubuntu version? \
    Sorry my english is not good.
    Thanks you so much!
     
  6. waltervl

    waltervl UDOOer

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    Double post https://www.udoo.org/forum/threads/flash-install-the-u-boot-on-a-microsd.29185/
     
  7. Phong

    Phong New Member

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    After completing all the steps on Neo's documentation.
    Have you built a complete kernel?
    After I finish the image is not started.
    Specifically, the notification LED is not flashing
     
  8. dathuynh148

    dathuynh148 New Member

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    Can you describe more clearly and give the link you follow?
     

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