topic How to flash eMMC? in i.MX Processors

How to flash eMMC?

ozanunsal — Fri, 21 Sep 2018 14:40:53 GMT

Hi I am new to iMX8M and I got the iMX8M QUAD EVK in order to improve my skill. However, I had a problem in flashing the eMMC without using mfgtool. I can boot with SD card but I want to flash this to the eMMC. So, the system can boot without SD card. Can anyone help me how to do this?

Regards,

Ozan

Re: How to flash eMMC?

Bio_TICFSL — Tue, 25 Sep 2018 16:13:16 GMT

Hi Ozan,

Attached is the Linux User Guide that can help you on booting from eMMC.

Regards

Re: How to flash eMMC?

Bio_TICFSL — Tue, 25 Sep 2018 16:14:50 GMT

Forget the attachement

Re: How to flash eMMC?

dennis3 — Tue, 25 Sep 2018 16:29:00 GMT

I copied my SD card contents straight to the eMMC chip and it worked fine.

suppose SD card is /dev/sda and eMMC chip is /dev/sdd

> dd if=/dev/sda of=/dev/sdd bs=1k

Caveats:

* My eMMC chip was a different (smaller capacity) size.

So after copy I used

1) fdisk -> delete and recreate the ext4 partition so it matches the eMMC size.

2) resize2fs to shrink the ext4 file system to match the new partition.

After eMMC chip is populated with new file system, I just had to change the boot pins on the dev board to boot from eMMC.