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products:sbc:vim4:development:boot-sequence

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products:sbc:vim4:development:boot-sequence [2022/07/26 02:57]
hyphop [U-boot shell usage] 		products:sbc:vim4:development:boot-sequence [2022/08/22 03:07]
hyphop old revision restored (2022/08/22 14:00)
Line 1: Line 1:
 +~~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 have possibility 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'' configurations+We talking there only about 1st stage SOC boot,  
 +next second stage OS loading possible for any other devices like USB storage's, 
 +NVMe etc ... and depends from ''u-boot'' configurations
 </WRAP> </WRAP>
- 
-/* not sure its needed ? 
-The OS image can be flased into the ''eMMC'', ''TF Card'' or ''SPI Flash''. 
-*/ 
  
 ===== Default boot priority ===== ===== Default boot priority =====
  
-  - TF-Card <wrap important> TF-card will always take the highest priority. </wrap>+  - TF-Card <wrap important> higher 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 33: Line 33:
  
 <WRAP important > <WRAP important >
-for apply setting for next reboot, need reboot device by RESET button or re-plug power cable or power-off device or [[#hot-apply-setting-changes-via-mcu-reboot|reboot via mcu]]+for apply setting for next boot, need reboot device by ''RESET'' button or re-plug power cable or power-off device or [[#hot-apply-setting-changes-via-mcu-reboot|reboot via mcu]]
 </WRAP> </WRAP>
  
Line 52: Line 52:
 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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