topic Re: How to program u-boot in eMMC without kobs-ng on iMX in i.MX Processors

How to program u-boot in eMMC without kobs-ng on iMX

marcocavallini — Mon, 23 Feb 2015 12:06:14 GMT

Hello,

I'd like to know if exists a method to store in eMMC a bootolader without kobs-ng, so without using linux, but simply running a command from u-boot.

I booted my i.MX28 system (I have the same question for i.MX6 as well) using the u-boot.sb (u-boot-2015.01 with SPL) file loaded with mxsldr (or imx-bootlets).

Now I am trying to save it in eMMC with the following command

loady (load u-boot.sb with ymodem)
mmc write ${loadaddr} 0 ${filesize}

but at reboot nothing happens.

TIA

Marco

Re: How to program u-boot in eMMC without kobs-ng on iMX

alejandrolozan1 — Tue, 24 Feb 2015 15:27:07 GMT

Hi,

The .sb files are intented to be used for the imx23 and imx28 devices. The file contains the boo_prep and power_prep needed to configure the DDR and power management.

In the imx6 the .sb are not needed. If you want to store u-boot in eMMC you just need the u-boot binary file with the IVT header and the correct offset so the BootROM can fetch the image.

Best Regards,

Alejandro

Re: How to program u-boot in eMMC without kobs-ng on iMX

alejandrolozan1 — Tue, 24 Feb 2015 15:30:57 GMT

Also, I believe a very good choice to have a working system for the imx28 and imx6 is to use Yocto.

Please refer to this awesome training Yocto Training - HOME

And the documentation loaded from our BSPs. https://www.freescale.com/webapp/Download?colCode=L3.10.53_1.1.0_iMX6QDLS_Bundle&appType=license&location=null&WT_TYPE=B…

I hope that helps,

Alejandro

Re: How to program u-boot in eMMC without kobs-ng on iMX

marcocavallini — Thu, 26 Feb 2015 16:48:11 GMT

we successfully programmed .sb in the eMMC/iNAND of our custom i-MX28 using MfgTools and we used u-boot-2015 + SPL.