SK-AM62B-P1: Uboot in eMMC

Hi Prashant，

Now I can boot from SD card and I want to boot from eMMC. I followed the guide: https://dev.ti.com/tirex/explore/node?node=A__AdNWBqCVds4ZSqU9osT1tQ__AM62-ACADEMY__uiYMDcq__LATEST, but I meet some question as bellow:

1. As the guide mention:

# mkdir -p /mnt/temp
# mount -t ext4 /dev/mmcblk0p1 /mnt/temp
# cd /mnt/temp
# tar xf <Linux image file copied from the host>
# cd ..
# umount temp

I got the Linux image from https://www.ti.com/tool/PROCESSOR-SDK-AM62X, however it's WIC images. It seems the images couldn't use tar to untar. So how to do for this step?

2.  I couldn't use saveenv to save environment variables:

=> setenv mmcdev 0
=> saveenv
Unknown command 'saveenv' - try 'help'

=> version
U-Boot 2024.04-ti-gfda88f8bcea3 (Jul 26 2024 - 11:00:12 +0000)

The SD card  is created by using balenTtcher and image is tisdk-default-image-am62xx-evm.rootfs.wic.xz which is got from https://www.ti.com/tool/PROCESSOR-SDK-AM62X.

Hello,

Jacky Zhong said:

It seems the images couldn't use tar to untar. So how to do for this step?

The tar filesystems are part of the SDK installation:

❯ pwd
/home/p-shivhare/ti/psdk/am62x/10.00.07.04
❯ ls -1 filesystem/am62xx-evm
tisdk-base-image-am62xx-evm.rootfs.tar.xz
tisdk-thinlinux-image-am62xx-evm.rootfs.tar.xz
tisdk-tiny-initramfs-am62xx-evm.rootfs.cpio

Jacky Zhong said:

I couldn't use saveenv to save environment variables:

The `saveenv` command has been removed in the recent SDKs.

Please see the following for the alternate solution:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1405760/am625-sk-am62x-lp-flash-u-boot-to-emmc-cannot-boot-from-boot0/5384627#5384627

Regards,

Prashant

Hi Prashant,

Which SDK would have the tar filesystems? I use the start kit AM62B-P1.

I couldn't find tisdk-base-image-am62xx-evm.rootfs.tar.xz in my sdk(ti-processor-sdk-linux-am62xx-evm-10.00.07.04-Linux-x86-Install.bin) installed which is get from here named Processor SDK Linux for AM62x.

Besides, I want to confirm whether the SDK I got could run good for start kit AM62B-P1?  Beacause I found it's name ....linux-am62xx.....

Best regards,

Jacky

Hello,

Jacky Zhong said:

I couldn't find tisdk-base-image-am62xx-evm.rootfs.tar.xz in my sdk(ti-processor-sdk-linux-am62xx-evm-10.00.07.04-Linux-x86-Install.bin)

After installation, the tar filesystems can be found at: $PSDK_INSTALL_DIR/filesystem/am62xx-evm.

Jacky Zhong said:

Besides, I want to confirm whether the SDK I got could run good for start kit AM62B-P1?  Beacause I found it's name ....linux-am62xx.....

Yes, that is the correct SDK.

Regards,

Prashant