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VIM1S Boot flow
VIM1S have advanced and flexible booting sequence… 
MCU ⇒ BROM ⇒ U-Boot ⇒ OS target
Next information actual for MCU ver: 0x0005
Hardware buttons
OOWOW boot led indication
OOWOW boot makes a red LED indication on the first boot seconds, it's looks like a short RED blinking 1-3 sec in success,
Red blink or permanent red LED means OOWOW failed
This indication common for VIM4, Edge2 and VIM1S
- Preparing for oowow
# red led hb mode i2c mw 0x18 0x89 3
- try to start
# red led off i2c mw 0x18 0x89 0
- oowow fail
# red led on mode i2c mw 0x18 0x89 1
dev-info
special pre-boot led indication
OOWOW mode
Exclusive special service mode: activated by hardware buttons or by software request
Ignore all boot sources like: USB removable stores , eMMC internal storage …
Boot fail service mode activated automatically as rescue mode for:
- internal eMMC storage is empty
- cant find any boot-able OS sources
- boot-up from other sources fail
Try at 1st boot from sources all sources: USB removable stores , eMMC internal storage …
Boot modes oowow shell usage
Set boot mode
~# bootmode spi ~# bootmode mmc [i] /opt/bootmode spi -> mmc(sd) ~# bootmode mmc ~# bootmode spi [i] /opt/bootmode mmc -> spi
Set oowow mode
Setup, check, or clean next OOWOW bootup…
~# mcu_oowow_mode set 1 [i] set with 1 ~# mcu_oowow_mode clean [i] set with 0 ~# mcu_oowow_mode && echo activated 0x01 activated ~# mcu_oowow_mode clean [i] set with 0 ~# mcu_oowow_mode || echo disabled disabled ~# i2cset -f -y 1 0x18 0x92 1 ~# i2cget -f -y 1 0x18 0x92 0x01
Reboot by MCU
Forced hardware reboot
~# mcu_reboot ~# i2cset -f -y 1 0x18 0x91 2
U-Boot stage
Current u-boot can start OS from USB ⇒ SD ⇒ eMMC ⇒ …
oowow spi uboot
- boot_targets
kvim1s# printenv boot_targets boot_targets=wow usb0 mmc0 mmc1 storeboot rescue fail pxe dhcp
mmc uboot
default eMMC u-boot log for Ubuntu images
- boot_targets
kvim1s# printenv boot_targets boot_targets=usb0 mmc0 mmc1 storeboot rescue fail pxe dhcp
MMC/SD boot areas
- MMC/SD boot areas
1STBLOB 0x00000200 0x0002a000 BL2E 0x0002a200 0x00013000 BL2X 0x0003d200 0x00011000 DDRFIP 0x0004e200 0x00040000 DEVFIP 0x0008e200 0x00300000
SPI-Flash boot areas
- SPI-Flash boot areas
1STBLOB 0x00000000 0x0002a000 BL2E 0x00054000 0x00013000 BL2X 0x0007a000 0x00011000 DDRFIP 0x0009c000 0x00040000 DEVFIP 0x0011c000 0x00300000