i.MX ProcessorsのトピックHow to flash uboot binary on iMX8MQ eMMC using dd command

How to flash uboot binary on iMX8MQ eMMC using dd command

haseeb_ashraf — Tue, 25 Feb 2020 06:46:27 GMT

I was able to flash the imx8mq uboot binary with uuu but I need to know the equivalent dd command to flash uboot binary to emmc.

I successfully flashed uboot environment on emmc with the following command

dd if=u-boot.env of=/dev/mmcblk0 bs=1k seek=4096 conv=fsync (the offset is same as sd-card)

but couldn't flash uboot binary with following dd commands (using same offset as for sd-card)

dd if=imx-boot-imx8mqevk-mel-emmc.bin of=/dev/mmcblk0 bs=1k seek=33 conv=fsync

dd if=imx-boot-imx8mqevk-mel-emmc.bin of=/dev/mmcblk0 bs=512 seek=66 conv=fsync

Though I was able to flash the same binary with uuu.

Is there a different offset for emmc ?

Re: How to flash uboot binary on iMX8MQ eMMC using dd command

joanxie — Fri, 28 Feb 2020 05:37:29 GMT

refer to the user guide, $ sudo dd if= of=/dev/sdx bs=1k seek= conv=fsync Where offset is: • 1 - for i.MX 6 or i.MX 7 • 33 - for i.MX 8QuadMax A0, i.MX 8QuadXPlus A0, i.MX 8M Quad, and i.MX 8M Mini • 32 - for i.MX 8QuadXPlus B0 and i.MX 8QuadMax B0 The first 16 KB of the SD/MMC card, which includes the partition table, is reserved. you also can refer to the 4.3.3 Partitioning the SD/MMC card of enclose file, don't forget fdisk your emmc

Re: How to flash uboot binary on iMX8MQ eMMC using dd command

vinothkumars — Fri, 29 Jan 2021 08:33:55 GMT

Hi @haseeb_ashraf

Did you find the solution

Re: How to flash uboot binary on iMX8MQ eMMC using dd command

thomasnam — Wed, 31 Mar 2021 11:29:19 GMT

Hello,
I'm working with iMX8MQ EVK board to make a product.

I need to program the flash.bin to eMMC by itself, so I need to know the equivalent method to dd command to flash bootloader binary to the eMMC.
The method in the kernel mode is better but U-Boot mode also good.

I think UUU can't self-programming.
I can flash the bootloader to SD card with dd command, but it is not working to the eMMC.
All documents describe how to program to SD/MMC card but the eMMC programming method is only the UUU.

Please guide me.

Re: How to flash uboot binary on iMX8MQ eMMC using dd command

BiyongSUN — Thu, 01 Apr 2021 05:37:24 GMT

Each and every binary BSP release contains the example for using Linux mode to flash the board.

Please check the <binary releas>/samples/example_kernel_emmc.uuu