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operating-system/Documentation/boards/hardkernel/odroid-xu4.md
Adam Griffiths 02836524ce Documentation (#769) 
* spelling correction

* Restuctured, added "features", "supported hardware", intro for developers and links to the developer documentation.

* Spelling correction

* URL correction

* Documentation restructure

* Moving developer documentation index from top level README to Documentation directory README

* fixing URLS

* Restructuring and adding to board config

* Improving navigation of docs oon github

* New line after first heading

(https://github.com/home-assistant/operating-system/pull/768#discussion_r453336692)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Update README.md

https://github.com/home-assistant/operating-system/pull/768#discussion_r453336871

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Update README.md

(https://github.com/home-assistant/operating-system/pull/768#discussion_r453336999)
- Surround headings with newlines
- ODROID
- Use dashes for unordered lists

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Update README.md

- new line after heading
(https://github.com/home-assistant/operating-system/pull/768#discussion_r453337043)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Update README.md

- \- for unordered lists
- new line after heading
(https://github.com/home-assistant/operating-system/pull/768#discussion_r453337101)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Update README.md

- new line after heading
- \- for unordered lists
(https://github.com/home-assistant/operating-system/pull/768#discussion_r453337183)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Spelling correction, to ensure /Dpcumentation/kernel.mdhas the correct spelling

* capitalisation

* using - for unordered lists

* Adding links to config files

* fixing links to _defconfig files

* fixing link for rpi0_w

* fixing link for rpi3_64 and rpi4_64

* making the ova README consistent with the others

* formmating

* fixing numbered list

* fixing indent for sub-bullets

* questions regarding Tinker S and OVA support

* resolving PR comment from fabaff

* resolving PR comment from fabaff

* https://github.com/home-assistant/operating-system/pull/769\#discussion_r456774209

* Changing uBoot to U-Boot (https://github.com/home-assistant/operating-system/pull/769#discussion_r456774290)

* s/boot sector/eMMC boot partition/ (See https://github.com/home-assistant/operating-system/pull/769#discussion_r456774329)

* As per comments here:
https://github.com/home-assistant/operating-system/pull/769#discussion_r456791491
https://github.com/home-assistant/operating-system/pull/769#discussion_r456791580

* HassOS is no longer the official name (https://github.com/home-assistant/operating-system/pull/769#discussion_r456791863)

* Should be Home Assistant Operating System (or OS) (see https://community.home-assistant.io/t/changing-the-home-assistant-brand/167500/16). See also commennts here https://github.com/home-assistant/operating-system/pull/769#discussion_r456793030, taken in to account along with previous comments about this paragraph.

* s/HassOS/Home Assistant Operating System/

* 8Gb Pi 4 will be supported soon (see comment https://github.com/home-assistant/operating-system/pull/769#discussion_r459768349)

* resolving conflict with main dev branch.

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
Co-authored-by: Pascal Vizeli <pvizeli@syshack.ch>
2020-08-03 16:31:36 +02:00

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ODROID-XU4

eMMC

The ODROID XU4 uses the eMMC boot partition to boot from. Typically eMMC readers can't write to this eMMC boot partition. There are a couple of possibilities:

  1. Working e.g. the eMMC already had a working image before flashing HassOS:
    • It will be booting to U-Boot (but no further).
      • If you have the serial adapter, you should be able to enter distro_bootcmd at the uboot prompt to continue booting.
      • If not, flash the HassOS image to an SD card and boot off that temporarily (while the eMMC is also plugged in).
    • Once booted, login at the prompts and then enter dd if=/dev/mmcblk0 of=/dev/mmcblk0boot0 bs=512 skip=63 seek=62 count=1440 at the linux prompt.
    • Reboot with eMMC (don't forget to flip the boot switch to eMMC)
  2. Not Working e.g. a clean/wiped/corruped eMMC boot partition:
    • You'll need to follow Hardkernel's instructions to get a working boot sector. Then flash HassOS and follow instructions above.
    • Alternatively, you can try flash HassOS to both an SD and eMMC, then boot off the SD with the eMMC also plugged in, then run dd if=/dev/mmcblk1 of=/dev/mmcblk0boot0 bs=512 skip=1 seek=0 count=16381 at the Linux prompt. Note that this is untested, but in theory should work..

If you are getting permissions issues when using the dd command, try disabling RO: echo 0 > /sys/block/mmcblk0boot0/force_ro to re-enable after running dd: echo 1 > /sys/block/mmcblk0boot0/force_ro

Console

By default, console access is granted over the serial header and over HDMI. Certain startup messages will only appear on the serial console by default. To show the messages on the HDMI console instead, swap the order of the two consoles in the cmdline.txt file on the boot partition. You can also delete the SAC2 console if you don't plan on using the serial adapter. eg. console=tty1 console=ttySAC2,115200

GPIO

Refer to the odroid wiki.

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