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products:sbc:vim4:development:boot-sequence

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products:sbc:vim4:development:boot-sequence [2022/07/26 02:51]
hyphop [Hot apply change setting via mcu reboot] 		products:sbc:vim4:development:boot-sequence [2022/08/22 00:00]
ruby [Default option]
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 +~~tag>VIM4 boot-sequence MCU~~
 +
 ====== VIM4 OS Boot Priority ====== ====== VIM4 OS Boot Priority ======
  
-VIM4 is capable of booting from the following devices: ''eMMC'', ''TF Card'', ''SPI Flash''+VIM4 is capable of boot-up from: ''eMMC'', ''TF Card'', ''SPI-Flash''
  
 <WRAP info > <WRAP info >
-We talking there only about 1st stage SOC boot, next second stage os loading possible for any other diveices like USB storages, NVME etc ... and depends from ''u-boot'' +This page mainly introduces about the first-stage SoC boot. The second-stage OS flashing is possible for USB storage and NVMe, which depends on ''u-boot'' configurations
 </WRAP> </WRAP>
  
-/* not sure its needed ? +===== Default option =====
-The OS image can be flased into the ''eMMC'', ''TF Card'' or ''SPI Flash''. +
-*/+
  
-===== Default boot priority ===== +  - TF-Card <wrap important> top priority </wrap>
- +
-  - TF-Card <wrap important> TF-card will always take the highest priority. </wrap>+
   - eMMC   - eMMC
   - SPI-Flash   - SPI-Flash
  
 ===== U-boot shell usage ===== ===== U-boot shell usage =====
-We can swap the boot priority of the ''eMMC'' and ''SPI Flash'' via the [[products:sbc:vim4:development:kbi|KBI(Khadas Boot Instructions)]] from u-boot shell+We can swap the boot priority of the ''eMMC'' and ''SPI-Flash'' via the [[products:sbc:vim4:development:kbi|KBI(Khadas Boot Instructions)]] from u-boot shell
  
 Change boot priority to: ''TF-Card => eMMC => SPI-Flash'' Change boot priority to: ''TF-Card => eMMC => SPI-Flash''
Line 31: Line 29:
 kvim4# kbi bootmode w spi kvim4# kbi bootmode w spi
 ``` ```
 +
 +<WRAP important >
 +To make the booting priority swap take effect, you can [[#hot-apply-setting-changes-via-mcu-reboot|reboot via mcu]], or you can reboot the hardware by clicking the Reset button, or plugging the power supply or cable.
 +</WRAP>
 +
  
 ===== Linux command-line usage ===== ===== Linux command-line usage =====
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 i2cset -f -y 6 0x18 0x91 1 i2cset -f -y 6 0x18 0x91 1
 ``` ```
 +
 +
 +===== OOWOW boot special shortcut =====
 +
 +Hold ''FUNCTION'' and short press ''RESET'' to force boot [[:OOWOW]] service from SPI-flash, and skip other boot sources
 +
 +<WRAP important>TF-card slot must be empty</WRAP>
  
  
Last modified: 2022/08/22 03:33 by hyphop

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