Flashing u-boot on SD card

VIM3
1

Hi all.

I have been trying to get my distro to boot on the Vim3 for a while now and have concluded that I need to flash uboot on the SD card to make it boot it.

So, since there is no documentation on this part in the Khadas Docs, I am asking here.

I have a u-boot.bin.sd.bin file built. But I have no flashing info on this file.
Other boards usually have a dd if=uboot.bin of=/dev/mmcblkX seek=X command for this.
So what is the specific uboot flashing command for the Vim3?

Thanks for the help.

2

For directly boot from SD card, both VIM1,VIM2 and VIM3 are the same.

You can refer to this documentation:

https://docs.khadas.com/vim3/CreateBootableSDCard.html

Note: If you want to boot from SD card, you have to erase the eMMC storage

kvim3#store init 3
kbvi3#reset
1 Like
3

Thanks.

I think we got it now.

Found these DD commands for SD cards which seems to work:

dd if=/boot/u-boot.bin.sd.bin of=/dev/mmcblk1 bs=1 count=444
dd if=/boot/u-boot.bin.sd.bin of=/dev/mmcblk1 bs=512 skip=1 seek=1
1 Like