SK-AM62: Access boot area 2 and flash Linux image using USB DFU in eMMC

Lit Zhi Chee

Part Number: SK-AM62

Hi,

I have already downloaded the Linux image to boot partition 1 in eMMC using USB DFU method. How do I do the same with boot partition 2? There are 2 boot areas in the eMMC right?

over 3 years ago

0 Bin Liu over 3 years ago

TI__Guru**** 180656 points

Hi,

Our U-Boot expert is out of office this week, but I will take a look on this and will update in a few days.

0 Lit Zhi Chee over 3 years ago

Prodigy 170 points

Does the AM62x boot from the user area by default? Is it capable to boot from boot0 or boot1?

+1 Bin Liu over 3 years ago in reply to Lit Zhi Chee

TI__Guru**** 180656 points

Hi,

By default it boots from boot0 parition. It can be configured to boot from boot1 partition. Please see the following e2e thread for details.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1084875/faq-tda4vm-dra829-dra821-how-to-boot-from-emmc-boot1-partition

+1 Bin Liu over 3 years ago

TI__Guru**** 180656 points

Lit Zhi Chee said:
How do I do the same with boot partition 2?

I think you need to modify uboot env $dfu_alt_info_emmc to let DFU use boot1 partition. Here is its default value for using boot0 partition:

=> print dfu_alt_info_emmc
dfu_alt_info_emmc=rawemmc raw 0 0x800000 mmcpart 1;rootfs part 0 1 mmcpart 0;tiboot3.bin.raw raw 0x0 0x400 mmcpart 1;tispl.bin.raw raw 0x400 0x1000 mmcpart 1;u-boot.img.raw raw 0x1400 0x2000 mmcpart 1;u-env.raw raw 0x3400 0x100 mmcpart 1;sysfw.itb.raw raw 0x3600 0x800 mmcpart 1

0 Lit Zhi Chee over 3 years ago in reply to Bin Liu

Prodigy 170 points

From what I can see, I need to change the all the "mmcpart 1" to "mmcpart 2", does it make sense?

0 Bin Liu over 3 years ago in reply to Lit Zhi Chee

TI__Guru**** 180656 points

Yes, it sounds correct.

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SK-AM62: Access boot area 2 and flash Linux image using USB DFU in eMMC