uboot
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found on eevBlog
To get a backup console access in case of fail – you need a RS232 accss to the unit
$>printenv bootargs $>bootargs=root=PARTUUID=24d1deac-3434-1a4e-98d1-68ee2945a5f1 rootwait ro console=ttyS2,115200 rfkill.default_state=0 $>setenv bootargs 'root=PARTUUID=24d1deac-3434-1a4e-98d1-68ee2945a5f1 rootwait ro console=ttyS2,115200 rfkill.default_state=0 single init=/bin/sh' $>boot $>mount -rw -o remount / $>passwd root $>reboot -f
To list mmc :
=> mmc list dwmmc@ff0f0000: 0 (eMMC)
to choose mmc dev :
=> mmc dev 0 switch to partitions #0, OK mmc0(part 0) is current device
uboot.1740422707.txt.gz · Last modified: 2025/02/24 19:45 by ounsatn