u-boot on the Vybrid tower board in a few commands

Document created by Vincent Stehle Employee on Jul 29, 2013Last modified by Vincent Stehle Employee on Jul 30, 2013
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Here is a quick summary at booting u-boot on the  TWR-VF65GS10 Vybrid tower board.

This is an adaptation of u-boot on the i.MX6 sabre sd platform in a few commands for Vybrid, now that mainline u-boot has proper support.


This assumes you already have a "working" Linux development environment with some ARM cross-compilers at hand (e.g. Debian + Emdebian).


Get u-boot sources


We will use git to fetch the U-Boot sources:


  $ git clone git://git.denx.de/u-boot.git


This should create a u-boot directory with all the latest sources.


Note that for more stability you might want to checkout a release instead of the latest version; to do so, list the available release tags with e.g. git tag -l 'v2*', and git checkout <the-desired-tag>.

Vybrid support in "mainline" u-boot is fairly recent so you will need a tag no older than v2013.07.




Assuming your cross compiler is called e.g. arm-linux-gnueabihf-gcc, you can compile by doing:


  $ cd u-boot

  $ export CROSS_COMPILE=arm-linux-gnueabihf-

  $ make vf610twr_config

  $ make


This should create a number of files, including u-boot.imx.

Put on SD


U-boot should reside at offset 1024B of your SD card. To put it there, do:


  $ dd if=u-boot.imx of=/dev/<your-sd-card> bs=1k seek=1

  $ sync


Your SD card device is typically something in /dev/sd<X> or /dev/mmcblk<X>. Note that you need write permissions on the SD card for the command to succeed, so you might need to su - as root, or use sudo, or do a chmod a+w as root on the SD card device node to grant permissions to users.




Your SD card is ready for booting. Insert it in the SD card slot of your Vybrid tower board, connect to the USB to UART port with a serial terminal set to 115200 baud, no parity, 8bit data, power up the platform and you should see something like:


U-Boot 2013.04-00300-g3d9138e (Jul 09 2013 - 11:57:02)



CPU:   Freescale Vybrid VF610 at 396 MHz

Reset cause: WDOG

Board: vf610twr

DRAM:  128 MiB

WARNING: Caches not enabled


In:    serial

Out:   serial

Err:   serial

Net:   Phy not found

PHY reset timed out


Warning: failed to set MAC address



Hit any key to stop autoboot:  0





See also...


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