11-28-2022, 06:41 PM
I guess you don't understand,, there are in effect 2 boots
The 1st is to uboot (boot order fixed),, THEN uboot changes the boot order (always, AFAIK)
As to your problem, unlike most other emmc provisioned devices,
the emmc is NOT soldered down, you can remove it
In, for example a TV box with soldered emmc, to disable emmc you have to short clock to gnd
Then, after SD boot, the emmc can be hot-plugged and the echo commands to enable it
OR,, buy a usb carrier and write OS image from other computer
OR write a different uboot to emmc (which can be done even from an emmc boot)
The 1st is to uboot (boot order fixed),, THEN uboot changes the boot order (always, AFAIK)
As to your problem, unlike most other emmc provisioned devices,
the emmc is NOT soldered down, you can remove it
In, for example a TV box with soldered emmc, to disable emmc you have to short clock to gnd
Then, after SD boot, the emmc can be hot-plugged and the echo commands to enable it
OR,, buy a usb carrier and write OS image from other computer
OR write a different uboot to emmc (which can be done even from an emmc boot)