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products:sbc:vim4:development:boot-sequence [2022/07/26 02:34] hyphop |
products:sbc:vim4:development:boot-sequence [2022/08/22 00:00] ruby [Default option] |
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+ | ~~tag> | ||
+ | |||
====== VIM4 OS Boot Priority ====== | ====== VIM4 OS Boot Priority ====== | ||
- | VIM4 is capable of booting | + | VIM4 is capable of boot-up |
<WRAP info > | <WRAP info > | ||
- | We talking there only about 1st stage SOC boot, next second stage os loading | + | This page mainly introduces |
</ | </ | ||
- | /* not sure its needed ? | + | ===== Default option ===== |
- | The OS image can be flased into the '' | + | |
- | */ | + | |
- | ===== Default boot priority ===== | + | |
- | + | ||
- | | + | |
- eMMC | - eMMC | ||
- SPI-Flash | - SPI-Flash | ||
+ | ===== U-boot shell usage ===== | ||
+ | We can swap the boot priority of the '' | ||
+ | Change boot priority to: '' | ||
+ | ```shell | ||
+ | kvim4# kbi bootmode w emmc | ||
+ | ``` | ||
- | You can also swap the boot priority | + | Change |
- | + | ||
- | * Setting the priority of '' | + | |
```shell | ```shell | ||
- | kvim4# kbi bootmode w emmc | + | kvim4# kbi bootmode w spi |
``` | ``` | ||
- | Then the boot priority | + | <WRAP important > |
+ | To make the booting | ||
+ | </ | ||
- | - TF Card | ||
- | - eMMC | ||
- | - SPI Flash | ||
- | * Setting the priority of '' | + | ===== Linux command-line usage ===== |
- | ```shell | + | ```sh |
- | kvim4# kbi bootmode w spi | + | i2cset -f -y 6 0x18 0x20 1 # setup default eMMC boot-mode |
``` | ``` | ||
- | Then the boot priority will become: | + | ```sh |
+ | i2cset -f -y 6 0x18 0x20 0 # setup SPI-flash | ||
+ | ``` | ||
+ | |||
+ | ==== Hot apply setting changes via mcu reboot ==== | ||
+ | |||
+ | ```sh | ||
+ | i2cset -f -y 6 0x18 0x91 1 | ||
+ | ``` | ||
+ | |||
+ | |||
+ | ===== OOWOW boot special shortcut ===== | ||
+ | |||
+ | Hold '' | ||
+ | |||
+ | <WRAP important> | ||
- | - TF Card | ||
- | - SPI Flash | ||
- | - eMMC |