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Help with the problem to download uboot img by dd commnd

Question asked by Tony Tang on Sep 3, 2015
Latest reply on Sep 4, 2015 by Tony Tang

We want to use dd command to download uboot image instead of MFGtool to fast debugging process as the following Freescale  documents  mention:

Although the steps can be finshed, the uboot remains the same as before. We made a special printf flag to verify this.  However, with the same uboot image, MFGtool can update it without problem.  Is there any extra step has to be done ?  security etc.


By the way, there is NO problem with dd recocery Image.


We are testing sabresd_6dq for smart devices and anroid 4.4.3.


Thanks for any suggestion.





2: Android user guide:


  1. 4.1.3 Downloading images with dd utility

The Linux utility "dd" on Linux computer can be used to download the images into the MMC/SD/TF card.

Before downloading, ensure that your MMC/SD/TF card partitions are created as described in Storage partitions.

All partitions can be recognized by the Linux computer. To download all images into the card, use the commands below:

Download the U-Boot image:

# sudo dd if=u-boot.imx of=/dev/sdx bs=1K seek=1; sync

Download the boot image:

# sudo dd if=boot.img of=/dev/sdx1; sync

Download the Android system root image:

# sudo dd if=system.img of=/dev/sdx5; sync

Download the Android recovery image:

# sudo dd if=recovery.img of=/dev/sdx2; sync