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VIM4 OS Booting Priority

VIM4 booting in operating system in eMMC, TF Card, or SPI-Flash

In this page, you will know that Khadas SBC booting-up sequence for other medium, such as USB storage,NVMe,ect, depends on U-Boot configurations.

Default boot priority

We can swap the TF-card for the eMMC or SPI-Flash in U-Boot shell via KBI(Khadas Boot Instructions)

Change booting priority to SPI-Flash: TF-Card ⇒ eMMC ⇒ SPI-Flash

kvim4# kbi bootmode w emmc

Change booting priority to eMMC: TF-Card ⇒ SPI-Flash ⇒ eMMC

kvim4# kbi bootmode w spi

for apply setting for next boot, need reboot device by RESET button or re-plug power cable or power-off device or reboot via mcu

i2cset -f -y 6 0x18 0x20 1 # setup default eMMC boot-mode

i2cset -f -y 6 0x18 0x20 0 # setup SPI-flash boot-mode

i2cset -f -y 6 0x18 0x91 1

Hold FUNCTION and short press RESET to force boot OOWOW service from SPI-flash, and skip other boot sources

TF-card slot must be empty